/*
* Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
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/*
*
*
*
*
*
* Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos
*
* All rights hg qreserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package java.time.format;
import static java.time.temporal.
ChronoField.
DAY_OF_MONTH;
import static java.time.temporal.
ChronoField.
HOUR_OF_DAY;
import static java.time.temporal.
ChronoField.
INSTANT_SECONDS;
import static java.time.temporal.
ChronoField.
MINUTE_OF_HOUR;
import static java.time.temporal.
ChronoField.
MONTH_OF_YEAR;
import static java.time.temporal.
ChronoField.
NANO_OF_SECOND;
import static java.time.temporal.
ChronoField.
OFFSET_SECONDS;
import static java.time.temporal.
ChronoField.
SECOND_OF_MINUTE;
import static java.time.temporal.
ChronoField.
YEAR;
import java.lang.ref.
SoftReference;
import java.math.
BigDecimal;
import java.math.
BigInteger;
import java.math.
RoundingMode;
import java.text.
ParsePosition;
import java.time.
DateTimeException;
import java.time.
Instant;
import java.time.
LocalDate;
import java.time.
LocalDateTime;
import java.time.
ZoneId;
import java.time.
ZoneOffset;
import java.time.chrono.
ChronoLocalDate;
import java.time.chrono.
Chronology;
import java.time.chrono.
IsoChronology;
import java.time.format.
DateTimeTextProvider.
LocaleStore;
import java.time.temporal.
ChronoField;
import java.time.temporal.
IsoFields;
import java.time.temporal.
TemporalAccessor;
import java.time.temporal.
TemporalField;
import java.time.temporal.
TemporalQueries;
import java.time.temporal.
TemporalQuery;
import java.time.temporal.
ValueRange;
import java.time.temporal.
WeekFields;
import java.time.zone.
ZoneRulesProvider;
import java.util.
AbstractMap.
SimpleImmutableEntry;
import java.util.
ArrayList;
import java.util.
Arrays;
import java.util.
Collections;
import java.util.
Comparator;
import java.util.
HashMap;
import java.util.
HashSet;
import java.util.
Iterator;
import java.util.
LinkedHashMap;
import java.util.
List;
import java.util.
Locale;
import java.util.
Map;
import java.util.
Map.
Entry;
import java.util.
Objects;
import java.util.
Set;
import java.util.
TimeZone;
import java.util.concurrent.
ConcurrentHashMap;
import java.util.concurrent.
ConcurrentMap;
import sun.util.locale.provider.
LocaleProviderAdapter;
import sun.util.locale.provider.
LocaleResources;
import sun.util.locale.provider.
TimeZoneNameUtility;
/**
* Builder to create date-time formatters.
* <p>
* This allows a {@code DateTimeFormatter} to be created.
* All date-time formatters are created ultimately using this builder.
* <p>
* The basic elements of date-time can all be added:
* <ul>
* <li>Value - a numeric value</li>
* <li>Fraction - a fractional value including the decimal place. Always use this when
* outputting fractions to ensure that the fraction is parsed correctly</li>
* <li>Text - the textual equivalent for the value</li>
* <li>OffsetId/Offset - the {@linkplain ZoneOffset zone offset}</li>
* <li>ZoneId - the {@linkplain ZoneId time-zone} id</li>
* <li>ZoneText - the name of the time-zone</li>
* <li>ChronologyId - the {@linkplain Chronology chronology} id</li>
* <li>ChronologyText - the name of the chronology</li>
* <li>Literal - a text literal</li>
* <li>Nested and Optional - formats can be nested or made optional</li>
* </ul>
* In addition, any of the elements may be decorated by padding, either with spaces or any other character.
* <p>
* Finally, a shorthand pattern, mostly compatible with {@code java.text.SimpleDateFormat SimpleDateFormat}
* can be used, see {@link #appendPattern(String)}.
* In practice, this simply parses the pattern and calls other methods on the builder.
*
* @implSpec
* This class is a mutable builder intended for use from a single thread.
*
* @since 1.8
*/
public final class
DateTimeFormatterBuilder {
/**
* Query for a time-zone that is region-only.
*/
private static final
TemporalQuery<
ZoneId>
QUERY_REGION_ONLY = (
temporal) -> {
ZoneId zone =
temporal.
query(
TemporalQueries.
zoneId());
return (
zone != null &&
zone instanceof
ZoneOffset == false ?
zone : null);
};
/**
* The currently active builder, used by the outermost builder.
*/
private
DateTimeFormatterBuilder active = this;
/**
* The parent builder, null for the outermost builder.
*/
private final
DateTimeFormatterBuilder parent;
/**
* The list of printers that will be used.
*/
private final
List<
DateTimePrinterParser>
printerParsers = new
ArrayList<>();
/**
* Whether this builder produces an optional formatter.
*/
private final boolean
optional;
/**
* The width to pad the next field to.
*/
private int
padNextWidth;
/**
* The character to pad the next field with.
*/
private char
padNextChar;
/**
* The index of the last variable width value parser.
*/
private int
valueParserIndex = -1;
/**
* Gets the formatting pattern for date and time styles for a locale and chronology.
* The locale and chronology are used to lookup the locale specific format
* for the requested dateStyle and/or timeStyle.
*
* @param dateStyle the FormatStyle for the date, null for time-only pattern
* @param timeStyle the FormatStyle for the time, null for date-only pattern
* @param chrono the Chronology, non-null
* @param locale the locale, non-null
* @return the locale and Chronology specific formatting pattern
* @throws IllegalArgumentException if both dateStyle and timeStyle are null
*/
public static
String getLocalizedDateTimePattern(
FormatStyle dateStyle,
FormatStyle timeStyle,
Chronology chrono,
Locale locale) {
Objects.
requireNonNull(
locale, "locale");
Objects.
requireNonNull(
chrono, "chrono");
if (
dateStyle == null &&
timeStyle == null) {
throw new
IllegalArgumentException("Either dateStyle or timeStyle must be non-null");
}
LocaleResources lr =
LocaleProviderAdapter.
getResourceBundleBased().
getLocaleResources(
locale);
String pattern =
lr.
getJavaTimeDateTimePattern(
convertStyle(
timeStyle),
convertStyle(
dateStyle),
chrono.
getCalendarType());
return
pattern;
}
/**
* Converts the given FormatStyle to the java.text.DateFormat style.
*
* @param style the FormatStyle style
* @return the int style, or -1 if style is null, indicating un-required
*/
private static int
convertStyle(
FormatStyle style) {
if (
style == null) {
return -1;
}
return
style.
ordinal(); // indices happen to align
}
/**
* Constructs a new instance of the builder.
*/
public
DateTimeFormatterBuilder() {
super();
parent = null;
optional = false;
}
/**
* Constructs a new instance of the builder.
*
* @param parent the parent builder, not null
* @param optional whether the formatter is optional, not null
*/
private
DateTimeFormatterBuilder(
DateTimeFormatterBuilder parent, boolean
optional) {
super();
this.
parent =
parent;
this.
optional =
optional;
}
//-----------------------------------------------------------------------
/**
* Changes the parse style to be case sensitive for the remainder of the formatter.
* <p>
* Parsing can be case sensitive or insensitive - by default it is case sensitive.
* This method allows the case sensitivity setting of parsing to be changed.
* <p>
* Calling this method changes the state of the builder such that all
* subsequent builder method calls will parse text in case sensitive mode.
* See {@link #parseCaseInsensitive} for the opposite setting.
* The parse case sensitive/insensitive methods may be called at any point
* in the builder, thus the parser can swap between case parsing modes
* multiple times during the parse.
* <p>
* Since the default is case sensitive, this method should only be used after
* a previous call to {@code #parseCaseInsensitive}.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder parseCaseSensitive() {
appendInternal(
SettingsParser.
SENSITIVE);
return this;
}
/**
* Changes the parse style to be case insensitive for the remainder of the formatter.
* <p>
* Parsing can be case sensitive or insensitive - by default it is case sensitive.
* This method allows the case sensitivity setting of parsing to be changed.
* <p>
* Calling this method changes the state of the builder such that all
* subsequent builder method calls will parse text in case insensitive mode.
* See {@link #parseCaseSensitive()} for the opposite setting.
* The parse case sensitive/insensitive methods may be called at any point
* in the builder, thus the parser can swap between case parsing modes
* multiple times during the parse.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder parseCaseInsensitive() {
appendInternal(
SettingsParser.
INSENSITIVE);
return this;
}
//-----------------------------------------------------------------------
/**
* Changes the parse style to be strict for the remainder of the formatter.
* <p>
* Parsing can be strict or lenient - by default its strict.
* This controls the degree of flexibility in matching the text and sign styles.
* <p>
* When used, this method changes the parsing to be strict from this point onwards.
* As strict is the default, this is normally only needed after calling {@link #parseLenient()}.
* The change will remain in force until the end of the formatter that is eventually
* constructed or until {@code parseLenient} is called.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder parseStrict() {
appendInternal(
SettingsParser.
STRICT);
return this;
}
/**
* Changes the parse style to be lenient for the remainder of the formatter.
* Note that case sensitivity is set separately to this method.
* <p>
* Parsing can be strict or lenient - by default its strict.
* This controls the degree of flexibility in matching the text and sign styles.
* Applications calling this method should typically also call {@link #parseCaseInsensitive()}.
* <p>
* When used, this method changes the parsing to be lenient from this point onwards.
* The change will remain in force until the end of the formatter that is eventually
* constructed or until {@code parseStrict} is called.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder parseLenient() {
appendInternal(
SettingsParser.
LENIENT);
return this;
}
//-----------------------------------------------------------------------
/**
* Appends a default value for a field to the formatter for use in parsing.
* <p>
* This appends an instruction to the builder to inject a default value
* into the parsed result. This is especially useful in conjunction with
* optional parts of the formatter.
* <p>
* For example, consider a formatter that parses the year, followed by
* an optional month, with a further optional day-of-month. Using such a
* formatter would require the calling code to check whether a full date,
* year-month or just a year had been parsed. This method can be used to
* default the month and day-of-month to a sensible value, such as the
* first of the month, allowing the calling code to always get a date.
* <p>
* During formatting, this method has no effect.
* <p>
* During parsing, the current state of the parse is inspected.
* If the specified field has no associated value, because it has not been
* parsed successfully at that point, then the specified value is injected
* into the parse result. Injection is immediate, thus the field-value pair
* will be visible to any subsequent elements in the formatter.
* As such, this method is normally called at the end of the builder.
*
* @param field the field to default the value of, not null
* @param value the value to default the field to
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder parseDefaulting(
TemporalField field, long
value) {
Objects.
requireNonNull(
field, "field");
appendInternal(new
DefaultValueParser(
field,
value));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the value of a date-time field to the formatter using a normal
* output style.
* <p>
* The value of the field will be output during a format.
* If the value cannot be obtained then an exception will be thrown.
* <p>
* The value will be printed as per the normal format of an integer value.
* Only negative numbers will be signed. No padding will be added.
* <p>
* The parser for a variable width value such as this normally behaves greedily,
* requiring one digit, but accepting as many digits as possible.
* This behavior can be affected by 'adjacent value parsing'.
* See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
*
* @param field the field to append, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendValue(
TemporalField field) {
Objects.
requireNonNull(
field, "field");
appendValue(new
NumberPrinterParser(
field, 1, 19,
SignStyle.
NORMAL));
return this;
}
/**
* Appends the value of a date-time field to the formatter using a fixed
* width, zero-padded approach.
* <p>
* The value of the field will be output during a format.
* If the value cannot be obtained then an exception will be thrown.
* <p>
* The value will be zero-padded on the left. If the size of the value
* means that it cannot be printed within the width then an exception is thrown.
* If the value of the field is negative then an exception is thrown during formatting.
* <p>
* This method supports a special technique of parsing known as 'adjacent value parsing'.
* This technique solves the problem where a value, variable or fixed width, is followed by one or more
* fixed length values. The standard parser is greedy, and thus it would normally
* steal the digits that are needed by the fixed width value parsers that follow the
* variable width one.
* <p>
* No action is required to initiate 'adjacent value parsing'.
* When a call to {@code appendValue} is made, the builder
* enters adjacent value parsing setup mode. If the immediately subsequent method
* call or calls on the same builder are for a fixed width value, then the parser will reserve
* space so that the fixed width values can be parsed.
* <p>
* For example, consider {@code builder.appendValue(YEAR).appendValue(MONTH_OF_YEAR, 2);}
* The year is a variable width parse of between 1 and 19 digits.
* The month is a fixed width parse of 2 digits.
* Because these were appended to the same builder immediately after one another,
* the year parser will reserve two digits for the month to parse.
* Thus, the text '201106' will correctly parse to a year of 2011 and a month of 6.
* Without adjacent value parsing, the year would greedily parse all six digits and leave
* nothing for the month.
* <p>
* Adjacent value parsing applies to each set of fixed width not-negative values in the parser
* that immediately follow any kind of value, variable or fixed width.
* Calling any other append method will end the setup of adjacent value parsing.
* Thus, in the unlikely event that you need to avoid adjacent value parsing behavior,
* simply add the {@code appendValue} to another {@code DateTimeFormatterBuilder}
* and add that to this builder.
* <p>
* If adjacent parsing is active, then parsing must match exactly the specified
* number of digits in both strict and lenient modes.
* In addition, no positive or negative sign is permitted.
*
* @param field the field to append, not null
* @param width the width of the printed field, from 1 to 19
* @return this, for chaining, not null
* @throws IllegalArgumentException if the width is invalid
*/
public
DateTimeFormatterBuilder appendValue(
TemporalField field, int
width) {
Objects.
requireNonNull(
field, "field");
if (
width < 1 ||
width > 19) {
throw new
IllegalArgumentException("The width must be from 1 to 19 inclusive but was " +
width);
}
NumberPrinterParser pp = new
NumberPrinterParser(
field,
width,
width,
SignStyle.
NOT_NEGATIVE);
appendValue(
pp);
return this;
}
/**
* Appends the value of a date-time field to the formatter providing full
* control over formatting.
* <p>
* The value of the field will be output during a format.
* If the value cannot be obtained then an exception will be thrown.
* <p>
* This method provides full control of the numeric formatting, including
* zero-padding and the positive/negative sign.
* <p>
* The parser for a variable width value such as this normally behaves greedily,
* accepting as many digits as possible.
* This behavior can be affected by 'adjacent value parsing'.
* See {@link #appendValue(java.time.temporal.TemporalField, int)} for full details.
* <p>
* In strict parsing mode, the minimum number of parsed digits is {@code minWidth}
* and the maximum is {@code maxWidth}.
* In lenient parsing mode, the minimum number of parsed digits is one
* and the maximum is 19 (except as limited by adjacent value parsing).
* <p>
* If this method is invoked with equal minimum and maximum widths and a sign style of
* {@code NOT_NEGATIVE} then it delegates to {@code appendValue(TemporalField,int)}.
* In this scenario, the formatting and parsing behavior described there occur.
*
* @param field the field to append, not null
* @param minWidth the minimum field width of the printed field, from 1 to 19
* @param maxWidth the maximum field width of the printed field, from 1 to 19
* @param signStyle the positive/negative output style, not null
* @return this, for chaining, not null
* @throws IllegalArgumentException if the widths are invalid
*/
public
DateTimeFormatterBuilder appendValue(
TemporalField field, int
minWidth, int
maxWidth,
SignStyle signStyle) {
if (
minWidth ==
maxWidth &&
signStyle ==
SignStyle.
NOT_NEGATIVE) {
return
appendValue(
field,
maxWidth);
}
Objects.
requireNonNull(
field, "field");
Objects.
requireNonNull(
signStyle, "signStyle");
if (
minWidth < 1 ||
minWidth > 19) {
throw new
IllegalArgumentException("The minimum width must be from 1 to 19 inclusive but was " +
minWidth);
}
if (
maxWidth < 1 ||
maxWidth > 19) {
throw new
IllegalArgumentException("The maximum width must be from 1 to 19 inclusive but was " +
maxWidth);
}
if (
maxWidth <
minWidth) {
throw new
IllegalArgumentException("The maximum width must exceed or equal the minimum width but " +
maxWidth + " < " +
minWidth);
}
NumberPrinterParser pp = new
NumberPrinterParser(
field,
minWidth,
maxWidth,
signStyle);
appendValue(
pp);
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the reduced value of a date-time field to the formatter.
* <p>
* Since fields such as year vary by chronology, it is recommended to use the
* {@link #appendValueReduced(TemporalField, int, int, ChronoLocalDate)} date}
* variant of this method in most cases. This variant is suitable for
* simple fields or working with only the ISO chronology.
* <p>
* For formatting, the {@code width} and {@code maxWidth} are used to
* determine the number of characters to format.
* If they are equal then the format is fixed width.
* If the value of the field is within the range of the {@code baseValue} using
* {@code width} characters then the reduced value is formatted otherwise the value is
* truncated to fit {@code maxWidth}.
* The rightmost characters are output to match the width, left padding with zero.
* <p>
* For strict parsing, the number of characters allowed by {@code width} to {@code maxWidth} are parsed.
* For lenient parsing, the number of characters must be at least 1 and less than 10.
* If the number of digits parsed is equal to {@code width} and the value is positive,
* the value of the field is computed to be the first number greater than
* or equal to the {@code baseValue} with the same least significant characters,
* otherwise the value parsed is the field value.
* This allows a reduced value to be entered for values in range of the baseValue
* and width and absolute values can be entered for values outside the range.
* <p>
* For example, a base value of {@code 1980} and a width of {@code 2} will have
* valid values from {@code 1980} to {@code 2079}.
* During parsing, the text {@code "12"} will result in the value {@code 2012} as that
* is the value within the range where the last two characters are "12".
* By contrast, parsing the text {@code "1915"} will result in the value {@code 1915}.
*
* @param field the field to append, not null
* @param width the field width of the printed and parsed field, from 1 to 10
* @param maxWidth the maximum field width of the printed field, from 1 to 10
* @param baseValue the base value of the range of valid values
* @return this, for chaining, not null
* @throws IllegalArgumentException if the width or base value is invalid
*/
public
DateTimeFormatterBuilder appendValueReduced(
TemporalField field,
int
width, int
maxWidth, int
baseValue) {
Objects.
requireNonNull(
field, "field");
ReducedPrinterParser pp = new
ReducedPrinterParser(
field,
width,
maxWidth,
baseValue, null);
appendValue(
pp);
return this;
}
/**
* Appends the reduced value of a date-time field to the formatter.
* <p>
* This is typically used for formatting and parsing a two digit year.
* <p>
* The base date is used to calculate the full value during parsing.
* For example, if the base date is 1950-01-01 then parsed values for
* a two digit year parse will be in the range 1950-01-01 to 2049-12-31.
* Only the year would be extracted from the date, thus a base date of
* 1950-08-25 would also parse to the range 1950-01-01 to 2049-12-31.
* This behavior is necessary to support fields such as week-based-year
* or other calendar systems where the parsed value does not align with
* standard ISO years.
* <p>
* The exact behavior is as follows. Parse the full set of fields and
* determine the effective chronology using the last chronology if
* it appears more than once. Then convert the base date to the
* effective chronology. Then extract the specified field from the
* chronology-specific base date and use it to determine the
* {@code baseValue} used below.
* <p>
* For formatting, the {@code width} and {@code maxWidth} are used to
* determine the number of characters to format.
* If they are equal then the format is fixed width.
* If the value of the field is within the range of the {@code baseValue} using
* {@code width} characters then the reduced value is formatted otherwise the value is
* truncated to fit {@code maxWidth}.
* The rightmost characters are output to match the width, left padding with zero.
* <p>
* For strict parsing, the number of characters allowed by {@code width} to {@code maxWidth} are parsed.
* For lenient parsing, the number of characters must be at least 1 and less than 10.
* If the number of digits parsed is equal to {@code width} and the value is positive,
* the value of the field is computed to be the first number greater than
* or equal to the {@code baseValue} with the same least significant characters,
* otherwise the value parsed is the field value.
* This allows a reduced value to be entered for values in range of the baseValue
* and width and absolute values can be entered for values outside the range.
* <p>
* For example, a base value of {@code 1980} and a width of {@code 2} will have
* valid values from {@code 1980} to {@code 2079}.
* During parsing, the text {@code "12"} will result in the value {@code 2012} as that
* is the value within the range where the last two characters are "12".
* By contrast, parsing the text {@code "1915"} will result in the value {@code 1915}.
*
* @param field the field to append, not null
* @param width the field width of the printed and parsed field, from 1 to 10
* @param maxWidth the maximum field width of the printed field, from 1 to 10
* @param baseDate the base date used to calculate the base value for the range
* of valid values in the parsed chronology, not null
* @return this, for chaining, not null
* @throws IllegalArgumentException if the width or base value is invalid
*/
public
DateTimeFormatterBuilder appendValueReduced(
TemporalField field, int
width, int
maxWidth,
ChronoLocalDate baseDate) {
Objects.
requireNonNull(
field, "field");
Objects.
requireNonNull(
baseDate, "baseDate");
ReducedPrinterParser pp = new
ReducedPrinterParser(
field,
width,
maxWidth, 0,
baseDate);
appendValue(
pp);
return this;
}
/**
* Appends a fixed or variable width printer-parser handling adjacent value mode.
* If a PrinterParser is not active then the new PrinterParser becomes
* the active PrinterParser.
* Otherwise, the active PrinterParser is modified depending on the new PrinterParser.
* If the new PrinterParser is fixed width and has sign style {@code NOT_NEGATIVE}
* then its width is added to the active PP and
* the new PrinterParser is forced to be fixed width.
* If the new PrinterParser is variable width, the active PrinterParser is changed
* to be fixed width and the new PrinterParser becomes the active PP.
*
* @param pp the printer-parser, not null
* @return this, for chaining, not null
*/
private
DateTimeFormatterBuilder appendValue(
NumberPrinterParser pp) {
if (
active.
valueParserIndex >= 0) {
final int
activeValueParser =
active.
valueParserIndex;
// adjacent parsing mode, update setting in previous parsers
NumberPrinterParser basePP = (
NumberPrinterParser)
active.
printerParsers.
get(
activeValueParser);
if (
pp.
minWidth ==
pp.
maxWidth &&
pp.
signStyle ==
SignStyle.
NOT_NEGATIVE) {
// Append the width to the subsequentWidth of the active parser
basePP =
basePP.
withSubsequentWidth(
pp.
maxWidth);
// Append the new parser as a fixed width
appendInternal(
pp.
withFixedWidth());
// Retain the previous active parser
active.
valueParserIndex =
activeValueParser;
} else {
// Modify the active parser to be fixed width
basePP =
basePP.
withFixedWidth();
// The new parser becomes the mew active parser
active.
valueParserIndex =
appendInternal(
pp);
}
// Replace the modified parser with the updated one
active.
printerParsers.
set(
activeValueParser,
basePP);
} else {
// The new Parser becomes the active parser
active.
valueParserIndex =
appendInternal(
pp);
}
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the fractional value of a date-time field to the formatter.
* <p>
* The fractional value of the field will be output including the
* preceding decimal point. The preceding value is not output.
* For example, the second-of-minute value of 15 would be output as {@code .25}.
* <p>
* The width of the printed fraction can be controlled. Setting the
* minimum width to zero will cause no output to be generated.
* The printed fraction will have the minimum width necessary between
* the minimum and maximum widths - trailing zeroes are omitted.
* No rounding occurs due to the maximum width - digits are simply dropped.
* <p>
* When parsing in strict mode, the number of parsed digits must be between
* the minimum and maximum width. When parsing in lenient mode, the minimum
* width is considered to be zero and the maximum is nine.
* <p>
* If the value cannot be obtained then an exception will be thrown.
* If the value is negative an exception will be thrown.
* If the field does not have a fixed set of valid values then an
* exception will be thrown.
* If the field value in the date-time to be printed is invalid it
* cannot be printed and an exception will be thrown.
*
* @param field the field to append, not null
* @param minWidth the minimum width of the field excluding the decimal point, from 0 to 9
* @param maxWidth the maximum width of the field excluding the decimal point, from 1 to 9
* @param decimalPoint whether to output the localized decimal point symbol
* @return this, for chaining, not null
* @throws IllegalArgumentException if the field has a variable set of valid values or
* either width is invalid
*/
public
DateTimeFormatterBuilder appendFraction(
TemporalField field, int
minWidth, int
maxWidth, boolean
decimalPoint) {
appendInternal(new
FractionPrinterParser(
field,
minWidth,
maxWidth,
decimalPoint));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the text of a date-time field to the formatter using the full
* text style.
* <p>
* The text of the field will be output during a format.
* The value must be within the valid range of the field.
* If the value cannot be obtained then an exception will be thrown.
* If the field has no textual representation, then the numeric value will be used.
* <p>
* The value will be printed as per the normal format of an integer value.
* Only negative numbers will be signed. No padding will be added.
*
* @param field the field to append, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendText(
TemporalField field) {
return
appendText(
field,
TextStyle.
FULL);
}
/**
* Appends the text of a date-time field to the formatter.
* <p>
* The text of the field will be output during a format.
* The value must be within the valid range of the field.
* If the value cannot be obtained then an exception will be thrown.
* If the field has no textual representation, then the numeric value will be used.
* <p>
* The value will be printed as per the normal format of an integer value.
* Only negative numbers will be signed. No padding will be added.
*
* @param field the field to append, not null
* @param textStyle the text style to use, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendText(
TemporalField field,
TextStyle textStyle) {
Objects.
requireNonNull(
field, "field");
Objects.
requireNonNull(
textStyle, "textStyle");
appendInternal(new
TextPrinterParser(
field,
textStyle,
DateTimeTextProvider.
getInstance()));
return this;
}
/**
* Appends the text of a date-time field to the formatter using the specified
* map to supply the text.
* <p>
* The standard text outputting methods use the localized text in the JDK.
* This method allows that text to be specified directly.
* The supplied map is not validated by the builder to ensure that formatting or
* parsing is possible, thus an invalid map may throw an error during later use.
* <p>
* Supplying the map of text provides considerable flexibility in formatting and parsing.
* For example, a legacy application might require or supply the months of the
* year as "JNY", "FBY", "MCH" etc. These do not match the standard set of text
* for localized month names. Using this method, a map can be created which
* defines the connection between each value and the text:
* <pre>
* Map<Long, String> map = new HashMap<>();
* map.put(1L, "JNY");
* map.put(2L, "FBY");
* map.put(3L, "MCH");
* ...
* builder.appendText(MONTH_OF_YEAR, map);
* </pre>
* <p>
* Other uses might be to output the value with a suffix, such as "1st", "2nd", "3rd",
* or as Roman numerals "I", "II", "III", "IV".
* <p>
* During formatting, the value is obtained and checked that it is in the valid range.
* If text is not available for the value then it is output as a number.
* During parsing, the parser will match against the map of text and numeric values.
*
* @param field the field to append, not null
* @param textLookup the map from the value to the text
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendText(
TemporalField field,
Map<
Long,
String>
textLookup) {
Objects.
requireNonNull(
field, "field");
Objects.
requireNonNull(
textLookup, "textLookup");
Map<
Long,
String>
copy = new
LinkedHashMap<>(
textLookup);
Map<
TextStyle,
Map<
Long,
String>>
map =
Collections.
singletonMap(
TextStyle.
FULL,
copy);
final
LocaleStore store = new
LocaleStore(
map);
DateTimeTextProvider provider = new
DateTimeTextProvider() {
@
Override
public
String getText(
Chronology chrono,
TemporalField field,
long
value,
TextStyle style,
Locale locale) {
return
store.
getText(
value,
style);
}
@
Override
public
String getText(
TemporalField field, long
value,
TextStyle style,
Locale locale) {
return
store.
getText(
value,
style);
}
@
Override
public
Iterator<
Entry<
String,
Long>>
getTextIterator(
Chronology chrono,
TemporalField field,
TextStyle style,
Locale locale) {
return
store.
getTextIterator(
style);
}
@
Override
public
Iterator<
Entry<
String,
Long>>
getTextIterator(
TemporalField field,
TextStyle style,
Locale locale) {
return
store.
getTextIterator(
style);
}
};
appendInternal(new
TextPrinterParser(
field,
TextStyle.
FULL,
provider));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends an instant using ISO-8601 to the formatter, formatting fractional
* digits in groups of three.
* <p>
* Instants have a fixed output format.
* They are converted to a date-time with a zone-offset of UTC and formatted
* using the standard ISO-8601 format.
* With this method, formatting nano-of-second outputs zero, three, six
* or nine digits digits as necessary.
* The localized decimal style is not used.
* <p>
* The instant is obtained using {@link ChronoField#INSTANT_SECONDS INSTANT_SECONDS}
* and optionally (@code NANO_OF_SECOND). The value of {@code INSTANT_SECONDS}
* may be outside the maximum range of {@code LocalDateTime}.
* <p>
* The {@linkplain ResolverStyle resolver style} has no effect on instant parsing.
* The end-of-day time of '24:00' is handled as midnight at the start of the following day.
* The leap-second time of '23:59:59' is handled to some degree, see
* {@link DateTimeFormatter#parsedLeapSecond()} for full details.
* <p>
* An alternative to this method is to format/parse the instant as a single
* epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendInstant() {
appendInternal(new
InstantPrinterParser(-2));
return this;
}
/**
* Appends an instant using ISO-8601 to the formatter with control over
* the number of fractional digits.
* <p>
* Instants have a fixed output format, although this method provides some
* control over the fractional digits. They are converted to a date-time
* with a zone-offset of UTC and printed using the standard ISO-8601 format.
* The localized decimal style is not used.
* <p>
* The {@code fractionalDigits} parameter allows the output of the fractional
* second to be controlled. Specifying zero will cause no fractional digits
* to be output. From 1 to 9 will output an increasing number of digits, using
* zero right-padding if necessary. The special value -1 is used to output as
* many digits as necessary to avoid any trailing zeroes.
* <p>
* When parsing in strict mode, the number of parsed digits must match the
* fractional digits. When parsing in lenient mode, any number of fractional
* digits from zero to nine are accepted.
* <p>
* The instant is obtained using {@link ChronoField#INSTANT_SECONDS INSTANT_SECONDS}
* and optionally (@code NANO_OF_SECOND). The value of {@code INSTANT_SECONDS}
* may be outside the maximum range of {@code LocalDateTime}.
* <p>
* The {@linkplain ResolverStyle resolver style} has no effect on instant parsing.
* The end-of-day time of '24:00' is handled as midnight at the start of the following day.
* The leap-second time of '23:59:60' is handled to some degree, see
* {@link DateTimeFormatter#parsedLeapSecond()} for full details.
* <p>
* An alternative to this method is to format/parse the instant as a single
* epoch-seconds value. That is achieved using {@code appendValue(INSTANT_SECONDS)}.
*
* @param fractionalDigits the number of fractional second digits to format with,
* from 0 to 9, or -1 to use as many digits as necessary
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendInstant(int
fractionalDigits) {
if (
fractionalDigits < -1 ||
fractionalDigits > 9) {
throw new
IllegalArgumentException("The fractional digits must be from -1 to 9 inclusive but was " +
fractionalDigits);
}
appendInternal(new
InstantPrinterParser(
fractionalDigits));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the zone offset, such as '+01:00', to the formatter.
* <p>
* This appends an instruction to format/parse the offset ID to the builder.
* This is equivalent to calling {@code appendOffset("+HH:MM:ss", "Z")}.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendOffsetId() {
appendInternal(
OffsetIdPrinterParser.
INSTANCE_ID_Z);
return this;
}
/**
* Appends the zone offset, such as '+01:00', to the formatter.
* <p>
* This appends an instruction to format/parse the offset ID to the builder.
* <p>
* During formatting, the offset is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#offset()}.
* It will be printed using the format defined below.
* If the offset cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, the offset is parsed using the format defined below.
* If the offset cannot be parsed then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* The format of the offset is controlled by a pattern which must be one
* of the following:
* <ul>
* <li>{@code +HH} - hour only, ignoring minute and second
* <li>{@code +HHmm} - hour, with minute if non-zero, ignoring second, no colon
* <li>{@code +HH:mm} - hour, with minute if non-zero, ignoring second, with colon
* <li>{@code +HHMM} - hour and minute, ignoring second, no colon
* <li>{@code +HH:MM} - hour and minute, ignoring second, with colon
* <li>{@code +HHMMss} - hour and minute, with second if non-zero, no colon
* <li>{@code +HH:MM:ss} - hour and minute, with second if non-zero, with colon
* <li>{@code +HHMMSS} - hour, minute and second, no colon
* <li>{@code +HH:MM:SS} - hour, minute and second, with colon
* </ul>
* The "no offset" text controls what text is printed when the total amount of
* the offset fields to be output is zero.
* Example values would be 'Z', '+00:00', 'UTC' or 'GMT'.
* Three formats are accepted for parsing UTC - the "no offset" text, and the
* plus and minus versions of zero defined by the pattern.
*
* @param pattern the pattern to use, not null
* @param noOffsetText the text to use when the offset is zero, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendOffset(
String pattern,
String noOffsetText) {
appendInternal(new
OffsetIdPrinterParser(
pattern,
noOffsetText));
return this;
}
/**
* Appends the localized zone offset, such as 'GMT+01:00', to the formatter.
* <p>
* This appends a localized zone offset to the builder, the format of the
* localized offset is controlled by the specified {@link FormatStyle style}
* to this method:
* <ul>
* <li>{@link TextStyle#FULL full} - formats with localized offset text, such
* as 'GMT, 2-digit hour and minute field, optional second field if non-zero,
* and colon.
* <li>{@link TextStyle#SHORT short} - formats with localized offset text,
* such as 'GMT, hour without leading zero, optional 2-digit minute and
* second if non-zero, and colon.
* </ul>
* <p>
* During formatting, the offset is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#offset()}.
* If the offset cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, the offset is parsed using the format defined above.
* If the offset cannot be parsed then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* @param style the format style to use, not null
* @return this, for chaining, not null
* @throws IllegalArgumentException if style is neither {@link TextStyle#FULL
* full} nor {@link TextStyle#SHORT short}
*/
public
DateTimeFormatterBuilder appendLocalizedOffset(
TextStyle style) {
Objects.
requireNonNull(
style, "style");
if (
style !=
TextStyle.
FULL &&
style !=
TextStyle.
SHORT) {
throw new
IllegalArgumentException("Style must be either full or short");
}
appendInternal(new
LocalizedOffsetIdPrinterParser(
style));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to the formatter.
* <p>
* This appends an instruction to format/parse the zone ID to the builder.
* The zone ID is obtained in a strict manner suitable for {@code ZonedDateTime}.
* By contrast, {@code OffsetDateTime} does not have a zone ID suitable
* for use with this method, see {@link #appendZoneOrOffsetId()}.
* <p>
* During formatting, the zone is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#zoneId()}.
* It will be printed using the result of {@link ZoneId#getId()}.
* If the zone cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, the text must match a known zone or offset.
* There are two types of zone ID, offset-based, such as '+01:30' and
* region-based, such as 'Europe/London'. These are parsed differently.
* If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser
* expects an offset-based zone and will not match region-based zones.
* The offset ID, such as '+02:30', may be at the start of the parse,
* or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is
* equivalent to using {@link #appendOffset(String, String)} using the
* arguments 'HH:MM:ss' and the no offset string '0'.
* If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot
* match a following offset ID, then {@link ZoneOffset#UTC} is selected.
* In all other cases, the list of known region-based zones is used to
* find the longest available match. If no match is found, and the parse
* starts with 'Z', then {@code ZoneOffset.UTC} is selected.
* The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
* <p>
* For example, the following will parse:
* <pre>
* "Europe/London" -- ZoneId.of("Europe/London")
* "Z" -- ZoneOffset.UTC
* "UT" -- ZoneId.of("UT")
* "UTC" -- ZoneId.of("UTC")
* "GMT" -- ZoneId.of("GMT")
* "+01:30" -- ZoneOffset.of("+01:30")
* "UT+01:30" -- ZoneOffset.of("+01:30")
* "UTC+01:30" -- ZoneOffset.of("+01:30")
* "GMT+01:30" -- ZoneOffset.of("+01:30")
* </pre>
*
* @return this, for chaining, not null
* @see #appendZoneRegionId()
*/
public
DateTimeFormatterBuilder appendZoneId() {
appendInternal(new
ZoneIdPrinterParser(
TemporalQueries.
zoneId(), "ZoneId()"));
return this;
}
/**
* Appends the time-zone region ID, such as 'Europe/Paris', to the formatter,
* rejecting the zone ID if it is a {@code ZoneOffset}.
* <p>
* This appends an instruction to format/parse the zone ID to the builder
* only if it is a region-based ID.
* <p>
* During formatting, the zone is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#zoneId()}.
* If the zone is a {@code ZoneOffset} or it cannot be obtained then
* an exception is thrown unless the section of the formatter is optional.
* If the zone is not an offset, then the zone will be printed using
* the zone ID from {@link ZoneId#getId()}.
* <p>
* During parsing, the text must match a known zone or offset.
* There are two types of zone ID, offset-based, such as '+01:30' and
* region-based, such as 'Europe/London'. These are parsed differently.
* If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser
* expects an offset-based zone and will not match region-based zones.
* The offset ID, such as '+02:30', may be at the start of the parse,
* or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is
* equivalent to using {@link #appendOffset(String, String)} using the
* arguments 'HH:MM:ss' and the no offset string '0'.
* If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot
* match a following offset ID, then {@link ZoneOffset#UTC} is selected.
* In all other cases, the list of known region-based zones is used to
* find the longest available match. If no match is found, and the parse
* starts with 'Z', then {@code ZoneOffset.UTC} is selected.
* The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
* <p>
* For example, the following will parse:
* <pre>
* "Europe/London" -- ZoneId.of("Europe/London")
* "Z" -- ZoneOffset.UTC
* "UT" -- ZoneId.of("UT")
* "UTC" -- ZoneId.of("UTC")
* "GMT" -- ZoneId.of("GMT")
* "+01:30" -- ZoneOffset.of("+01:30")
* "UT+01:30" -- ZoneOffset.of("+01:30")
* "UTC+01:30" -- ZoneOffset.of("+01:30")
* "GMT+01:30" -- ZoneOffset.of("+01:30")
* </pre>
* <p>
* Note that this method is identical to {@code appendZoneId()} except
* in the mechanism used to obtain the zone.
* Note also that parsing accepts offsets, whereas formatting will never
* produce one.
*
* @return this, for chaining, not null
* @see #appendZoneId()
*/
public
DateTimeFormatterBuilder appendZoneRegionId() {
appendInternal(new
ZoneIdPrinterParser(
QUERY_REGION_ONLY, "ZoneRegionId()"));
return this;
}
/**
* Appends the time-zone ID, such as 'Europe/Paris' or '+02:00', to
* the formatter, using the best available zone ID.
* <p>
* This appends an instruction to format/parse the best available
* zone or offset ID to the builder.
* The zone ID is obtained in a lenient manner that first attempts to
* find a true zone ID, such as that on {@code ZonedDateTime}, and
* then attempts to find an offset, such as that on {@code OffsetDateTime}.
* <p>
* During formatting, the zone is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#zone()}.
* It will be printed using the result of {@link ZoneId#getId()}.
* If the zone cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, the text must match a known zone or offset.
* There are two types of zone ID, offset-based, such as '+01:30' and
* region-based, such as 'Europe/London'. These are parsed differently.
* If the parse starts with '+', '-', 'UT', 'UTC' or 'GMT', then the parser
* expects an offset-based zone and will not match region-based zones.
* The offset ID, such as '+02:30', may be at the start of the parse,
* or prefixed by 'UT', 'UTC' or 'GMT'. The offset ID parsing is
* equivalent to using {@link #appendOffset(String, String)} using the
* arguments 'HH:MM:ss' and the no offset string '0'.
* If the parse starts with 'UT', 'UTC' or 'GMT', and the parser cannot
* match a following offset ID, then {@link ZoneOffset#UTC} is selected.
* In all other cases, the list of known region-based zones is used to
* find the longest available match. If no match is found, and the parse
* starts with 'Z', then {@code ZoneOffset.UTC} is selected.
* The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
* <p>
* For example, the following will parse:
* <pre>
* "Europe/London" -- ZoneId.of("Europe/London")
* "Z" -- ZoneOffset.UTC
* "UT" -- ZoneId.of("UT")
* "UTC" -- ZoneId.of("UTC")
* "GMT" -- ZoneId.of("GMT")
* "+01:30" -- ZoneOffset.of("+01:30")
* "UT+01:30" -- ZoneOffset.of("UT+01:30")
* "UTC+01:30" -- ZoneOffset.of("UTC+01:30")
* "GMT+01:30" -- ZoneOffset.of("GMT+01:30")
* </pre>
* <p>
* Note that this method is identical to {@code appendZoneId()} except
* in the mechanism used to obtain the zone.
*
* @return this, for chaining, not null
* @see #appendZoneId()
*/
public
DateTimeFormatterBuilder appendZoneOrOffsetId() {
appendInternal(new
ZoneIdPrinterParser(
TemporalQueries.
zone(), "ZoneOrOffsetId()"));
return this;
}
/**
* Appends the time-zone name, such as 'British Summer Time', to the formatter.
* <p>
* This appends an instruction to format/parse the textual name of the zone to
* the builder.
* <p>
* During formatting, the zone is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#zoneId()}.
* If the zone is a {@code ZoneOffset} it will be printed using the
* result of {@link ZoneOffset#getId()}.
* If the zone is not an offset, the textual name will be looked up
* for the locale set in the {@link DateTimeFormatter}.
* If the temporal object being printed represents an instant, then the text
* will be the summer or winter time text as appropriate.
* If the lookup for text does not find any suitable result, then the
* {@link ZoneId#getId() ID} will be printed instead.
* If the zone cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, either the textual zone name, the zone ID or the offset
* is accepted. Many textual zone names are not unique, such as CST can be
* for both "Central Standard Time" and "China Standard Time". In this
* situation, the zone id will be determined by the region information from
* formatter's {@link DateTimeFormatter#getLocale() locale} and the standard
* zone id for that area, for example, America/New_York for the America Eastern
* zone. The {@link #appendZoneText(TextStyle, Set)} may be used
* to specify a set of preferred {@link ZoneId} in this situation.
*
* @param textStyle the text style to use, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendZoneText(
TextStyle textStyle) {
appendInternal(new
ZoneTextPrinterParser(
textStyle, null));
return this;
}
/**
* Appends the time-zone name, such as 'British Summer Time', to the formatter.
* <p>
* This appends an instruction to format/parse the textual name of the zone to
* the builder.
* <p>
* During formatting, the zone is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#zoneId()}.
* If the zone is a {@code ZoneOffset} it will be printed using the
* result of {@link ZoneOffset#getId()}.
* If the zone is not an offset, the textual name will be looked up
* for the locale set in the {@link DateTimeFormatter}.
* If the temporal object being printed represents an instant, then the text
* will be the summer or winter time text as appropriate.
* If the lookup for text does not find any suitable result, then the
* {@link ZoneId#getId() ID} will be printed instead.
* If the zone cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, either the textual zone name, the zone ID or the offset
* is accepted. Many textual zone names are not unique, such as CST can be
* for both "Central Standard Time" and "China Standard Time". In this
* situation, the zone id will be determined by the region information from
* formatter's {@link DateTimeFormatter#getLocale() locale} and the standard
* zone id for that area, for example, America/New_York for the America Eastern
* zone. This method also allows a set of preferred {@link ZoneId} to be
* specified for parsing. The matched preferred zone id will be used if the
* textural zone name being parsed is not unique.
* <p>
* If the zone cannot be parsed then an exception is thrown unless the
* section of the formatter is optional.
*
* @param textStyle the text style to use, not null
* @param preferredZones the set of preferred zone ids, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendZoneText(
TextStyle textStyle,
Set<
ZoneId>
preferredZones) {
Objects.
requireNonNull(
preferredZones, "preferredZones");
appendInternal(new
ZoneTextPrinterParser(
textStyle,
preferredZones));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the chronology ID, such as 'ISO' or 'ThaiBuddhist', to the formatter.
* <p>
* This appends an instruction to format/parse the chronology ID to the builder.
* <p>
* During formatting, the chronology is obtained using a mechanism equivalent
* to querying the temporal with {@link TemporalQueries#chronology()}.
* It will be printed using the result of {@link Chronology#getId()}.
* If the chronology cannot be obtained then an exception is thrown unless the
* section of the formatter is optional.
* <p>
* During parsing, the chronology is parsed and must match one of the chronologies
* in {@link Chronology#getAvailableChronologies()}.
* If the chronology cannot be parsed then an exception is thrown unless the
* section of the formatter is optional.
* The parser uses the {@linkplain #parseCaseInsensitive() case sensitive} setting.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendChronologyId() {
appendInternal(new
ChronoPrinterParser(null));
return this;
}
/**
* Appends the chronology name to the formatter.
* <p>
* The calendar system name will be output during a format.
* If the chronology cannot be obtained then an exception will be thrown.
*
* @param textStyle the text style to use, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendChronologyText(
TextStyle textStyle) {
Objects.
requireNonNull(
textStyle, "textStyle");
appendInternal(new
ChronoPrinterParser(
textStyle));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends a localized date-time pattern to the formatter.
* <p>
* This appends a localized section to the builder, suitable for outputting
* a date, time or date-time combination. The format of the localized
* section is lazily looked up based on four items:
* <ul>
* <li>the {@code dateStyle} specified to this method
* <li>the {@code timeStyle} specified to this method
* <li>the {@code Locale} of the {@code DateTimeFormatter}
* <li>the {@code Chronology}, selecting the best available
* </ul>
* During formatting, the chronology is obtained from the temporal object
* being formatted, which may have been overridden by
* {@link DateTimeFormatter#withChronology(Chronology)}.
* <p>
* During parsing, if a chronology has already been parsed, then it is used.
* Otherwise the default from {@code DateTimeFormatter.withChronology(Chronology)}
* is used, with {@code IsoChronology} as the fallback.
* <p>
* Note that this method provides similar functionality to methods on
* {@code DateFormat} such as {@link java.text.DateFormat#getDateTimeInstance(int, int)}.
*
* @param dateStyle the date style to use, null means no date required
* @param timeStyle the time style to use, null means no time required
* @return this, for chaining, not null
* @throws IllegalArgumentException if both the date and time styles are null
*/
public
DateTimeFormatterBuilder appendLocalized(
FormatStyle dateStyle,
FormatStyle timeStyle) {
if (
dateStyle == null &&
timeStyle == null) {
throw new
IllegalArgumentException("Either the date or time style must be non-null");
}
appendInternal(new
LocalizedPrinterParser(
dateStyle,
timeStyle));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends a character literal to the formatter.
* <p>
* This character will be output during a format.
*
* @param literal the literal to append, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendLiteral(char
literal) {
appendInternal(new
CharLiteralPrinterParser(
literal));
return this;
}
/**
* Appends a string literal to the formatter.
* <p>
* This string will be output during a format.
* <p>
* If the literal is empty, nothing is added to the formatter.
*
* @param literal the literal to append, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendLiteral(
String literal) {
Objects.
requireNonNull(
literal, "literal");
if (
literal.
length() > 0) {
if (
literal.
length() == 1) {
appendInternal(new
CharLiteralPrinterParser(
literal.
charAt(0)));
} else {
appendInternal(new
StringLiteralPrinterParser(
literal));
}
}
return this;
}
//-----------------------------------------------------------------------
/**
* Appends all the elements of a formatter to the builder.
* <p>
* This method has the same effect as appending each of the constituent
* parts of the formatter directly to this builder.
*
* @param formatter the formatter to add, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder append(
DateTimeFormatter formatter) {
Objects.
requireNonNull(
formatter, "formatter");
appendInternal(
formatter.
toPrinterParser(false));
return this;
}
/**
* Appends a formatter to the builder which will optionally format/parse.
* <p>
* This method has the same effect as appending each of the constituent
* parts directly to this builder surrounded by an {@link #optionalStart()} and
* {@link #optionalEnd()}.
* <p>
* The formatter will format if data is available for all the fields contained within it.
* The formatter will parse if the string matches, otherwise no error is returned.
*
* @param formatter the formatter to add, not null
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder appendOptional(
DateTimeFormatter formatter) {
Objects.
requireNonNull(
formatter, "formatter");
appendInternal(
formatter.
toPrinterParser(true));
return this;
}
//-----------------------------------------------------------------------
/**
* Appends the elements defined by the specified pattern to the builder.
* <p>
* All letters 'A' to 'Z' and 'a' to 'z' are reserved as pattern letters.
* The characters '#', '{' and '}' are reserved for future use.
* The characters '[' and ']' indicate optional patterns.
* The following pattern letters are defined:
* <pre>
* Symbol Meaning Presentation Examples
* ------ ------- ------------ -------
* G era text AD; Anno Domini; A
* u year year 2004; 04
* y year-of-era year 2004; 04
* D day-of-year number 189
* M/L month-of-year number/text 7; 07; Jul; July; J
* d day-of-month number 10
*
* Q/q quarter-of-year number/text 3; 03; Q3; 3rd quarter
* Y week-based-year year 1996; 96
* w week-of-week-based-year number 27
* W week-of-month number 4
* E day-of-week text Tue; Tuesday; T
* e/c localized day-of-week number/text 2; 02; Tue; Tuesday; T
* F week-of-month number 3
*
* a am-pm-of-day text PM
* h clock-hour-of-am-pm (1-12) number 12
* K hour-of-am-pm (0-11) number 0
* k clock-hour-of-am-pm (1-24) number 0
*
* H hour-of-day (0-23) number 0
* m minute-of-hour number 30
* s second-of-minute number 55
* S fraction-of-second fraction 978
* A milli-of-day number 1234
* n nano-of-second number 987654321
* N nano-of-day number 1234000000
*
* V time-zone ID zone-id America/Los_Angeles; Z; -08:30
* z time-zone name zone-name Pacific Standard Time; PST
* O localized zone-offset offset-O GMT+8; GMT+08:00; UTC-08:00;
* X zone-offset 'Z' for zero offset-X Z; -08; -0830; -08:30; -083015; -08:30:15;
* x zone-offset offset-x +0000; -08; -0830; -08:30; -083015; -08:30:15;
* Z zone-offset offset-Z +0000; -0800; -08:00;
*
* p pad next pad modifier 1
*
* ' escape for text delimiter
* '' single quote literal '
* [ optional section start
* ] optional section end
* # reserved for future use
* { reserved for future use
* } reserved for future use
* </pre>
* <p>
* The count of pattern letters determine the format.
* See <a href="DateTimeFormatter.html#patterns">DateTimeFormatter</a> for a user-focused description of the patterns.
* The following tables define how the pattern letters map to the builder.
* <p>
* <b>Date fields</b>: Pattern letters to output a date.
* <pre>
* Pattern Count Equivalent builder methods
* ------- ----- --------------------------
* G 1 appendText(ChronoField.ERA, TextStyle.SHORT)
* GG 2 appendText(ChronoField.ERA, TextStyle.SHORT)
* GGG 3 appendText(ChronoField.ERA, TextStyle.SHORT)
* GGGG 4 appendText(ChronoField.ERA, TextStyle.FULL)
* GGGGG 5 appendText(ChronoField.ERA, TextStyle.NARROW)
*
* u 1 appendValue(ChronoField.YEAR, 1, 19, SignStyle.NORMAL);
* uu 2 appendValueReduced(ChronoField.YEAR, 2, 2000);
* uuu 3 appendValue(ChronoField.YEAR, 3, 19, SignStyle.NORMAL);
* u..u 4..n appendValue(ChronoField.YEAR, n, 19, SignStyle.EXCEEDS_PAD);
* y 1 appendValue(ChronoField.YEAR_OF_ERA, 1, 19, SignStyle.NORMAL);
* yy 2 appendValueReduced(ChronoField.YEAR_OF_ERA, 2, 2000);
* yyy 3 appendValue(ChronoField.YEAR_OF_ERA, 3, 19, SignStyle.NORMAL);
* y..y 4..n appendValue(ChronoField.YEAR_OF_ERA, n, 19, SignStyle.EXCEEDS_PAD);
* Y 1 append special localized WeekFields element for numeric week-based-year
* YY 2 append special localized WeekFields element for reduced numeric week-based-year 2 digits;
* YYY 3 append special localized WeekFields element for numeric week-based-year (3, 19, SignStyle.NORMAL);
* Y..Y 4..n append special localized WeekFields element for numeric week-based-year (n, 19, SignStyle.EXCEEDS_PAD);
*
* Q 1 appendValue(IsoFields.QUARTER_OF_YEAR);
* QQ 2 appendValue(IsoFields.QUARTER_OF_YEAR, 2);
* QQQ 3 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.SHORT)
* QQQQ 4 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.FULL)
* QQQQQ 5 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.NARROW)
* q 1 appendValue(IsoFields.QUARTER_OF_YEAR);
* qq 2 appendValue(IsoFields.QUARTER_OF_YEAR, 2);
* qqq 3 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.SHORT_STANDALONE)
* qqqq 4 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.FULL_STANDALONE)
* qqqqq 5 appendText(IsoFields.QUARTER_OF_YEAR, TextStyle.NARROW_STANDALONE)
*
* M 1 appendValue(ChronoField.MONTH_OF_YEAR);
* MM 2 appendValue(ChronoField.MONTH_OF_YEAR, 2);
* MMM 3 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.SHORT)
* MMMM 4 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.FULL)
* MMMMM 5 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.NARROW)
* L 1 appendValue(ChronoField.MONTH_OF_YEAR);
* LL 2 appendValue(ChronoField.MONTH_OF_YEAR, 2);
* LLL 3 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.SHORT_STANDALONE)
* LLLL 4 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.FULL_STANDALONE)
* LLLLL 5 appendText(ChronoField.MONTH_OF_YEAR, TextStyle.NARROW_STANDALONE)
*
* w 1 append special localized WeekFields element for numeric week-of-year
* ww 2 append special localized WeekFields element for numeric week-of-year, zero-padded
* W 1 append special localized WeekFields element for numeric week-of-month
* d 1 appendValue(ChronoField.DAY_OF_MONTH)
* dd 2 appendValue(ChronoField.DAY_OF_MONTH, 2)
* D 1 appendValue(ChronoField.DAY_OF_YEAR)
* DD 2 appendValue(ChronoField.DAY_OF_YEAR, 2)
* DDD 3 appendValue(ChronoField.DAY_OF_YEAR, 3)
* F 1 appendValue(ChronoField.ALIGNED_DAY_OF_WEEK_IN_MONTH)
* E 1 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
* EE 2 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
* EEE 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
* EEEE 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL)
* EEEEE 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW)
* e 1 append special localized WeekFields element for numeric day-of-week
* ee 2 append special localized WeekFields element for numeric day-of-week, zero-padded
* eee 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT)
* eeee 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL)
* eeeee 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW)
* c 1 append special localized WeekFields element for numeric day-of-week
* ccc 3 appendText(ChronoField.DAY_OF_WEEK, TextStyle.SHORT_STANDALONE)
* cccc 4 appendText(ChronoField.DAY_OF_WEEK, TextStyle.FULL_STANDALONE)
* ccccc 5 appendText(ChronoField.DAY_OF_WEEK, TextStyle.NARROW_STANDALONE)
* </pre>
* <p>
* <b>Time fields</b>: Pattern letters to output a time.
* <pre>
* Pattern Count Equivalent builder methods
* ------- ----- --------------------------
* a 1 appendText(ChronoField.AMPM_OF_DAY, TextStyle.SHORT)
* h 1 appendValue(ChronoField.CLOCK_HOUR_OF_AMPM)
* hh 2 appendValue(ChronoField.CLOCK_HOUR_OF_AMPM, 2)
* H 1 appendValue(ChronoField.HOUR_OF_DAY)
* HH 2 appendValue(ChronoField.HOUR_OF_DAY, 2)
* k 1 appendValue(ChronoField.CLOCK_HOUR_OF_DAY)
* kk 2 appendValue(ChronoField.CLOCK_HOUR_OF_DAY, 2)
* K 1 appendValue(ChronoField.HOUR_OF_AMPM)
* KK 2 appendValue(ChronoField.HOUR_OF_AMPM, 2)
* m 1 appendValue(ChronoField.MINUTE_OF_HOUR)
* mm 2 appendValue(ChronoField.MINUTE_OF_HOUR, 2)
* s 1 appendValue(ChronoField.SECOND_OF_MINUTE)
* ss 2 appendValue(ChronoField.SECOND_OF_MINUTE, 2)
*
* S..S 1..n appendFraction(ChronoField.NANO_OF_SECOND, n, n, false)
* A 1 appendValue(ChronoField.MILLI_OF_DAY)
* A..A 2..n appendValue(ChronoField.MILLI_OF_DAY, n)
* n 1 appendValue(ChronoField.NANO_OF_SECOND)
* n..n 2..n appendValue(ChronoField.NANO_OF_SECOND, n)
* N 1 appendValue(ChronoField.NANO_OF_DAY)
* N..N 2..n appendValue(ChronoField.NANO_OF_DAY, n)
* </pre>
* <p>
* <b>Zone ID</b>: Pattern letters to output {@code ZoneId}.
* <pre>
* Pattern Count Equivalent builder methods
* ------- ----- --------------------------
* VV 2 appendZoneId()
* z 1 appendZoneText(TextStyle.SHORT)
* zz 2 appendZoneText(TextStyle.SHORT)
* zzz 3 appendZoneText(TextStyle.SHORT)
* zzzz 4 appendZoneText(TextStyle.FULL)
* </pre>
* <p>
* <b>Zone offset</b>: Pattern letters to output {@code ZoneOffset}.
* <pre>
* Pattern Count Equivalent builder methods
* ------- ----- --------------------------
* O 1 appendLocalizedOffsetPrefixed(TextStyle.SHORT);
* OOOO 4 appendLocalizedOffsetPrefixed(TextStyle.FULL);
* X 1 appendOffset("+HHmm","Z")
* XX 2 appendOffset("+HHMM","Z")
* XXX 3 appendOffset("+HH:MM","Z")
* XXXX 4 appendOffset("+HHMMss","Z")
* XXXXX 5 appendOffset("+HH:MM:ss","Z")
* x 1 appendOffset("+HHmm","+00")
* xx 2 appendOffset("+HHMM","+0000")
* xxx 3 appendOffset("+HH:MM","+00:00")
* xxxx 4 appendOffset("+HHMMss","+0000")
* xxxxx 5 appendOffset("+HH:MM:ss","+00:00")
* Z 1 appendOffset("+HHMM","+0000")
* ZZ 2 appendOffset("+HHMM","+0000")
* ZZZ 3 appendOffset("+HHMM","+0000")
* ZZZZ 4 appendLocalizedOffset(TextStyle.FULL);
* ZZZZZ 5 appendOffset("+HH:MM:ss","Z")
* </pre>
* <p>
* <b>Modifiers</b>: Pattern letters that modify the rest of the pattern:
* <pre>
* Pattern Count Equivalent builder methods
* ------- ----- --------------------------
* [ 1 optionalStart()
* ] 1 optionalEnd()
* p..p 1..n padNext(n)
* </pre>
* <p>
* Any sequence of letters not specified above, unrecognized letter or
* reserved character will throw an exception.
* Future versions may add to the set of patterns.
* It is recommended to use single quotes around all characters that you want
* to output directly to ensure that future changes do not break your application.
* <p>
* Note that the pattern string is similar, but not identical, to
* {@link java.text.SimpleDateFormat SimpleDateFormat}.
* The pattern string is also similar, but not identical, to that defined by the
* Unicode Common Locale Data Repository (CLDR/LDML).
* Pattern letters 'X' and 'u' are aligned with Unicode CLDR/LDML.
* By contrast, {@code SimpleDateFormat} uses 'u' for the numeric day of week.
* Pattern letters 'y' and 'Y' parse years of two digits and more than 4 digits differently.
* Pattern letters 'n', 'A', 'N', and 'p' are added.
* Number types will reject large numbers.
*
* @param pattern the pattern to add, not null
* @return this, for chaining, not null
* @throws IllegalArgumentException if the pattern is invalid
*/
public
DateTimeFormatterBuilder appendPattern(
String pattern) {
Objects.
requireNonNull(
pattern, "pattern");
parsePattern(
pattern);
return this;
}
private void
parsePattern(
String pattern) {
for (int
pos = 0;
pos <
pattern.
length();
pos++) {
char
cur =
pattern.
charAt(
pos);
if ((
cur >= 'A' &&
cur <= 'Z') || (
cur >= 'a' &&
cur <= 'z')) {
int
start =
pos++;
for ( ;
pos <
pattern.
length() &&
pattern.
charAt(
pos) ==
cur;
pos++); // short loop
int
count =
pos -
start;
// padding
if (
cur == 'p') {
int
pad = 0;
if (
pos <
pattern.
length()) {
cur =
pattern.
charAt(
pos);
if ((
cur >= 'A' &&
cur <= 'Z') || (
cur >= 'a' &&
cur <= 'z')) {
pad =
count;
start =
pos++;
for ( ;
pos <
pattern.
length() &&
pattern.
charAt(
pos) ==
cur;
pos++); // short loop
count =
pos -
start;
}
}
if (
pad == 0) {
throw new
IllegalArgumentException(
"Pad letter 'p' must be followed by valid pad pattern: " +
pattern);
}
padNext(
pad); // pad and continue parsing
}
// main rules
TemporalField field =
FIELD_MAP.
get(
cur);
if (
field != null) {
parseField(
cur,
count,
field);
} else if (
cur == 'z') {
if (
count > 4) {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
} else if (
count == 4) {
appendZoneText(
TextStyle.
FULL);
} else {
appendZoneText(
TextStyle.
SHORT);
}
} else if (
cur == 'V') {
if (
count != 2) {
throw new
IllegalArgumentException("Pattern letter count must be 2: " +
cur);
}
appendZoneId();
} else if (
cur == 'Z') {
if (
count < 4) {
appendOffset("+HHMM", "+0000");
} else if (
count == 4) {
appendLocalizedOffset(
TextStyle.
FULL);
} else if (
count == 5) {
appendOffset("+HH:MM:ss","Z");
} else {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
} else if (
cur == 'O') {
if (
count == 1) {
appendLocalizedOffset(
TextStyle.
SHORT);
} else if (
count == 4) {
appendLocalizedOffset(
TextStyle.
FULL);
} else {
throw new
IllegalArgumentException("Pattern letter count must be 1 or 4: " +
cur);
}
} else if (
cur == 'X') {
if (
count > 5) {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
appendOffset(
OffsetIdPrinterParser.
PATTERNS[
count + (
count == 1 ? 0 : 1)], "Z");
} else if (
cur == 'x') {
if (
count > 5) {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
String zero = (
count == 1 ? "+00" : (
count % 2 == 0 ? "+0000" : "+00:00"));
appendOffset(
OffsetIdPrinterParser.
PATTERNS[
count + (
count == 1 ? 0 : 1)],
zero);
} else if (
cur == 'W') {
// Fields defined by Locale
if (
count > 1) {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
appendInternal(new
WeekBasedFieldPrinterParser(
cur,
count));
} else if (
cur == 'w') {
// Fields defined by Locale
if (
count > 2) {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
appendInternal(new
WeekBasedFieldPrinterParser(
cur,
count));
} else if (
cur == 'Y') {
// Fields defined by Locale
appendInternal(new
WeekBasedFieldPrinterParser(
cur,
count));
} else {
throw new
IllegalArgumentException("Unknown pattern letter: " +
cur);
}
pos--;
} else if (
cur == '\'') {
// parse literals
int
start =
pos++;
for ( ;
pos <
pattern.
length();
pos++) {
if (
pattern.
charAt(
pos) == '\'') {
if (
pos + 1 <
pattern.
length() &&
pattern.
charAt(
pos + 1) == '\'') {
pos++;
} else {
break; // end of literal
}
}
}
if (
pos >=
pattern.
length()) {
throw new
IllegalArgumentException("Pattern ends with an incomplete string literal: " +
pattern);
}
String str =
pattern.
substring(
start + 1,
pos);
if (
str.
length() == 0) {
appendLiteral('\'');
} else {
appendLiteral(
str.
replace("''", "'"));
}
} else if (
cur == '[') {
optionalStart();
} else if (
cur == ']') {
if (
active.
parent == null) {
throw new
IllegalArgumentException("Pattern invalid as it contains ] without previous [");
}
optionalEnd();
} else if (
cur == '{' ||
cur == '}' ||
cur == '#') {
throw new
IllegalArgumentException("Pattern includes reserved character: '" +
cur + "'");
} else {
appendLiteral(
cur);
}
}
}
@
SuppressWarnings("fallthrough")
private void
parseField(char
cur, int
count,
TemporalField field) {
boolean
standalone = false;
switch (
cur) {
case 'u':
case 'y':
if (
count == 2) {
appendValueReduced(
field, 2, 2,
ReducedPrinterParser.
BASE_DATE);
} else if (
count < 4) {
appendValue(
field,
count, 19,
SignStyle.
NORMAL);
} else {
appendValue(
field,
count, 19,
SignStyle.
EXCEEDS_PAD);
}
break;
case 'c':
if (
count == 2) {
throw new
IllegalArgumentException("Invalid pattern \"cc\"");
}
/*fallthrough*/
case 'L':
case 'q':
standalone = true;
/*fallthrough*/
case 'M':
case 'Q':
case 'E':
case 'e':
switch (
count) {
case 1:
case 2:
if (
cur == 'c' ||
cur == 'e') {
appendInternal(new
WeekBasedFieldPrinterParser(
cur,
count));
} else if (
cur == 'E') {
appendText(
field,
TextStyle.
SHORT);
} else {
if (
count == 1) {
appendValue(
field);
} else {
appendValue(
field, 2);
}
}
break;
case 3:
appendText(
field,
standalone ?
TextStyle.
SHORT_STANDALONE :
TextStyle.
SHORT);
break;
case 4:
appendText(
field,
standalone ?
TextStyle.
FULL_STANDALONE :
TextStyle.
FULL);
break;
case 5:
appendText(
field,
standalone ?
TextStyle.
NARROW_STANDALONE :
TextStyle.
NARROW);
break;
default:
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
break;
case 'a':
if (
count == 1) {
appendText(
field,
TextStyle.
SHORT);
} else {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
break;
case 'G':
switch (
count) {
case 1:
case 2:
case 3:
appendText(
field,
TextStyle.
SHORT);
break;
case 4:
appendText(
field,
TextStyle.
FULL);
break;
case 5:
appendText(
field,
TextStyle.
NARROW);
break;
default:
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
break;
case 'S':
appendFraction(
NANO_OF_SECOND,
count,
count, false);
break;
case 'F':
if (
count == 1) {
appendValue(
field);
} else {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
break;
case 'd':
case 'h':
case 'H':
case 'k':
case 'K':
case 'm':
case 's':
if (
count == 1) {
appendValue(
field);
} else if (
count == 2) {
appendValue(
field,
count);
} else {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
break;
case 'D':
if (
count == 1) {
appendValue(
field);
} else if (
count <= 3) {
appendValue(
field,
count);
} else {
throw new
IllegalArgumentException("Too many pattern letters: " +
cur);
}
break;
default:
if (
count == 1) {
appendValue(
field);
} else {
appendValue(
field,
count);
}
break;
}
}
/** Map of letters to fields. */
private static final
Map<
Character,
TemporalField>
FIELD_MAP = new
HashMap<>();
static {
// SDF = SimpleDateFormat
FIELD_MAP.
put('G',
ChronoField.
ERA); // SDF, LDML (different to both for 1/2 chars)
FIELD_MAP.
put('y',
ChronoField.
YEAR_OF_ERA); // SDF, LDML
FIELD_MAP.
put('u',
ChronoField.
YEAR); // LDML (different in SDF)
FIELD_MAP.
put('Q',
IsoFields.
QUARTER_OF_YEAR); // LDML (removed quarter from 310)
FIELD_MAP.
put('q',
IsoFields.
QUARTER_OF_YEAR); // LDML (stand-alone)
FIELD_MAP.
put('M',
ChronoField.
MONTH_OF_YEAR); // SDF, LDML
FIELD_MAP.
put('L',
ChronoField.
MONTH_OF_YEAR); // SDF, LDML (stand-alone)
FIELD_MAP.
put('D',
ChronoField.
DAY_OF_YEAR); // SDF, LDML
FIELD_MAP.
put('d',
ChronoField.
DAY_OF_MONTH); // SDF, LDML
FIELD_MAP.
put('F',
ChronoField.
ALIGNED_DAY_OF_WEEK_IN_MONTH); // SDF, LDML
FIELD_MAP.
put('E',
ChronoField.
DAY_OF_WEEK); // SDF, LDML (different to both for 1/2 chars)
FIELD_MAP.
put('c',
ChronoField.
DAY_OF_WEEK); // LDML (stand-alone)
FIELD_MAP.
put('e',
ChronoField.
DAY_OF_WEEK); // LDML (needs localized week number)
FIELD_MAP.
put('a',
ChronoField.
AMPM_OF_DAY); // SDF, LDML
FIELD_MAP.
put('H',
ChronoField.
HOUR_OF_DAY); // SDF, LDML
FIELD_MAP.
put('k',
ChronoField.
CLOCK_HOUR_OF_DAY); // SDF, LDML
FIELD_MAP.
put('K',
ChronoField.
HOUR_OF_AMPM); // SDF, LDML
FIELD_MAP.
put('h',
ChronoField.
CLOCK_HOUR_OF_AMPM); // SDF, LDML
FIELD_MAP.
put('m',
ChronoField.
MINUTE_OF_HOUR); // SDF, LDML
FIELD_MAP.
put('s',
ChronoField.
SECOND_OF_MINUTE); // SDF, LDML
FIELD_MAP.
put('S',
ChronoField.
NANO_OF_SECOND); // LDML (SDF uses milli-of-second number)
FIELD_MAP.
put('A',
ChronoField.
MILLI_OF_DAY); // LDML
FIELD_MAP.
put('n',
ChronoField.
NANO_OF_SECOND); // 310 (proposed for LDML)
FIELD_MAP.
put('N',
ChronoField.
NANO_OF_DAY); // 310 (proposed for LDML)
// 310 - z - time-zone names, matches LDML and SimpleDateFormat 1 to 4
// 310 - Z - matches SimpleDateFormat and LDML
// 310 - V - time-zone id, matches LDML
// 310 - p - prefix for padding
// 310 - X - matches LDML, almost matches SDF for 1, exact match 2&3, extended 4&5
// 310 - x - matches LDML
// 310 - w, W, and Y are localized forms matching LDML
// LDML - U - cycle year name, not supported by 310 yet
// LDML - l - deprecated
// LDML - j - not relevant
// LDML - g - modified-julian-day
// LDML - v,V - extended time-zone names
}
//-----------------------------------------------------------------------
/**
* Causes the next added printer/parser to pad to a fixed width using a space.
* <p>
* This padding will pad to a fixed width using spaces.
* <p>
* During formatting, the decorated element will be output and then padded
* to the specified width. An exception will be thrown during formatting if
* the pad width is exceeded.
* <p>
* During parsing, the padding and decorated element are parsed.
* If parsing is lenient, then the pad width is treated as a maximum.
* The padding is parsed greedily. Thus, if the decorated element starts with
* the pad character, it will not be parsed.
*
* @param padWidth the pad width, 1 or greater
* @return this, for chaining, not null
* @throws IllegalArgumentException if pad width is too small
*/
public
DateTimeFormatterBuilder padNext(int
padWidth) {
return
padNext(
padWidth, ' ');
}
/**
* Causes the next added printer/parser to pad to a fixed width.
* <p>
* This padding is intended for padding other than zero-padding.
* Zero-padding should be achieved using the appendValue methods.
* <p>
* During formatting, the decorated element will be output and then padded
* to the specified width. An exception will be thrown during formatting if
* the pad width is exceeded.
* <p>
* During parsing, the padding and decorated element are parsed.
* If parsing is lenient, then the pad width is treated as a maximum.
* If parsing is case insensitive, then the pad character is matched ignoring case.
* The padding is parsed greedily. Thus, if the decorated element starts with
* the pad character, it will not be parsed.
*
* @param padWidth the pad width, 1 or greater
* @param padChar the pad character
* @return this, for chaining, not null
* @throws IllegalArgumentException if pad width is too small
*/
public
DateTimeFormatterBuilder padNext(int
padWidth, char
padChar) {
if (
padWidth < 1) {
throw new
IllegalArgumentException("The pad width must be at least one but was " +
padWidth);
}
active.
padNextWidth =
padWidth;
active.
padNextChar =
padChar;
active.
valueParserIndex = -1;
return this;
}
//-----------------------------------------------------------------------
/**
* Mark the start of an optional section.
* <p>
* The output of formatting can include optional sections, which may be nested.
* An optional section is started by calling this method and ended by calling
* {@link #optionalEnd()} or by ending the build process.
* <p>
* All elements in the optional section are treated as optional.
* During formatting, the section is only output if data is available in the
* {@code TemporalAccessor} for all the elements in the section.
* During parsing, the whole section may be missing from the parsed string.
* <p>
* For example, consider a builder setup as
* {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2)}.
* The optional section ends automatically at the end of the builder.
* During formatting, the minute will only be output if its value can be obtained from the date-time.
* During parsing, the input will be successfully parsed whether the minute is present or not.
*
* @return this, for chaining, not null
*/
public
DateTimeFormatterBuilder optionalStart() {
active.
valueParserIndex = -1;
active = new
DateTimeFormatterBuilder(
active, true);
return this;
}
/**
* Ends an optional section.
* <p>
* The output of formatting can include optional sections, which may be nested.
* An optional section is started by calling {@link #optionalStart()} and ended
* using this method (or at the end of the builder).
* <p>
* Calling this method without having previously called {@code optionalStart}
* will throw an exception.
* Calling this method immediately after calling {@code optionalStart} has no effect
* on the formatter other than ending the (empty) optional section.
* <p>
* All elements in the optional section are treated as optional.
* During formatting, the section is only output if data is available in the
* {@code TemporalAccessor} for all the elements in the section.
* During parsing, the whole section may be missing from the parsed string.
* <p>
* For example, consider a builder setup as
* {@code builder.appendValue(HOUR_OF_DAY,2).optionalStart().appendValue(MINUTE_OF_HOUR,2).optionalEnd()}.
* During formatting, the minute will only be output if its value can be obtained from the date-time.
* During parsing, the input will be successfully parsed whether the minute is present or not.
*
* @return this, for chaining, not null
* @throws IllegalStateException if there was no previous call to {@code optionalStart}
*/
public
DateTimeFormatterBuilder optionalEnd() {
if (
active.
parent == null) {
throw new
IllegalStateException("Cannot call optionalEnd() as there was no previous call to optionalStart()");
}
if (
active.
printerParsers.
size() > 0) {
CompositePrinterParser cpp = new
CompositePrinterParser(
active.
printerParsers,
active.
optional);
active =
active.
parent;
appendInternal(
cpp);
} else {
active =
active.
parent;
}
return this;
}
//-----------------------------------------------------------------------
/**
* Appends a printer and/or parser to the internal list handling padding.
*
* @param pp the printer-parser to add, not null
* @return the index into the active parsers list
*/
private int
appendInternal(
DateTimePrinterParser pp) {
Objects.
requireNonNull(
pp, "pp");
if (
active.
padNextWidth > 0) {
if (
pp != null) {
pp = new
PadPrinterParserDecorator(
pp,
active.
padNextWidth,
active.
padNextChar);
}
active.
padNextWidth = 0;
active.
padNextChar = 0;
}
active.
printerParsers.
add(
pp);
active.
valueParserIndex = -1;
return
active.
printerParsers.
size() - 1;
}
//-----------------------------------------------------------------------
/**
* Completes this builder by creating the {@code DateTimeFormatter}
* using the default locale.
* <p>
* This will create a formatter with the {@linkplain Locale#getDefault(Locale.Category) default FORMAT locale}.
* Numbers will be printed and parsed using the standard DecimalStyle.
* The resolver style will be {@link ResolverStyle#SMART SMART}.
* <p>
* Calling this method will end any open optional sections by repeatedly
* calling {@link #optionalEnd()} before creating the formatter.
* <p>
* This builder can still be used after creating the formatter if desired,
* although the state may have been changed by calls to {@code optionalEnd}.
*
* @return the created formatter, not null
*/
public
DateTimeFormatter toFormatter() {
return
toFormatter(
Locale.
getDefault(
Locale.
Category.
FORMAT));
}
/**
* Completes this builder by creating the {@code DateTimeFormatter}
* using the specified locale.
* <p>
* This will create a formatter with the specified locale.
* Numbers will be printed and parsed using the standard DecimalStyle.
* The resolver style will be {@link ResolverStyle#SMART SMART}.
* <p>
* Calling this method will end any open optional sections by repeatedly
* calling {@link #optionalEnd()} before creating the formatter.
* <p>
* This builder can still be used after creating the formatter if desired,
* although the state may have been changed by calls to {@code optionalEnd}.
*
* @param locale the locale to use for formatting, not null
* @return the created formatter, not null
*/
public
DateTimeFormatter toFormatter(
Locale locale) {
return
toFormatter(
locale,
ResolverStyle.
SMART, null);
}
/**
* Completes this builder by creating the formatter.
* This uses the default locale.
*
* @param resolverStyle the resolver style to use, not null
* @return the created formatter, not null
*/
DateTimeFormatter toFormatter(
ResolverStyle resolverStyle,
Chronology chrono) {
return
toFormatter(
Locale.
getDefault(
Locale.
Category.
FORMAT),
resolverStyle,
chrono);
}
/**
* Completes this builder by creating the formatter.
*
* @param locale the locale to use for formatting, not null
* @param chrono the chronology to use, may be null
* @return the created formatter, not null
*/
private
DateTimeFormatter toFormatter(
Locale locale,
ResolverStyle resolverStyle,
Chronology chrono) {
Objects.
requireNonNull(
locale, "locale");
while (
active.
parent != null) {
optionalEnd();
}
CompositePrinterParser pp = new
CompositePrinterParser(
printerParsers, false);
return new
DateTimeFormatter(
pp,
locale,
DecimalStyle.
STANDARD,
resolverStyle, null,
chrono, null);
}
//-----------------------------------------------------------------------
/**
* Strategy for formatting/parsing date-time information.
* <p>
* The printer may format any part, or the whole, of the input date-time object.
* Typically, a complete format is constructed from a number of smaller
* units, each outputting a single field.
* <p>
* The parser may parse any piece of text from the input, storing the result
* in the context. Typically, each individual parser will just parse one
* field, such as the day-of-month, storing the value in the context.
* Once the parse is complete, the caller will then resolve the parsed values
* to create the desired object, such as a {@code LocalDate}.
* <p>
* The parse position will be updated during the parse. Parsing will start at
* the specified index and the return value specifies the new parse position
* for the next parser. If an error occurs, the returned index will be negative
* and will have the error position encoded using the complement operator.
*
* @implSpec
* This interface must be implemented with care to ensure other classes operate correctly.
* All implementations that can be instantiated must be final, immutable and thread-safe.
* <p>
* The context is not a thread-safe object and a new instance will be created
* for each format that occurs. The context must not be stored in an instance
* variable or shared with any other threads.
*/
interface
DateTimePrinterParser {
/**
* Prints the date-time object to the buffer.
* <p>
* The context holds information to use during the format.
* It also contains the date-time information to be printed.
* <p>
* The buffer must not be mutated beyond the content controlled by the implementation.
*
* @param context the context to format using, not null
* @param buf the buffer to append to, not null
* @return false if unable to query the value from the date-time, true otherwise
* @throws DateTimeException if the date-time cannot be printed successfully
*/
boolean
format(
DateTimePrintContext context,
StringBuilder buf);
/**
* Parses text into date-time information.
* <p>
* The context holds information to use during the parse.
* It is also used to store the parsed date-time information.
*
* @param context the context to use and parse into, not null
* @param text the input text to parse, not null
* @param position the position to start parsing at, from 0 to the text length
* @return the new parse position, where negative means an error with the
* error position encoded using the complement ~ operator
* @throws NullPointerException if the context or text is null
* @throws IndexOutOfBoundsException if the position is invalid
*/
int
parse(
DateTimeParseContext context,
CharSequence text, int
position);
}
//-----------------------------------------------------------------------
/**
* Composite printer and parser.
*/
static final class
CompositePrinterParser implements
DateTimePrinterParser {
private final
DateTimePrinterParser[]
printerParsers;
private final boolean
optional;
CompositePrinterParser(
List<
DateTimePrinterParser>
printerParsers, boolean
optional) {
this(
printerParsers.
toArray(new
DateTimePrinterParser[
printerParsers.
size()]),
optional);
}
CompositePrinterParser(
DateTimePrinterParser[]
printerParsers, boolean
optional) {
this.
printerParsers =
printerParsers;
this.
optional =
optional;
}
/**
* Returns a copy of this printer-parser with the optional flag changed.
*
* @param optional the optional flag to set in the copy
* @return the new printer-parser, not null
*/
public
CompositePrinterParser withOptional(boolean
optional) {
if (
optional == this.
optional) {
return this;
}
return new
CompositePrinterParser(
printerParsers,
optional);
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
int
length =
buf.
length();
if (
optional) {
context.
startOptional();
}
try {
for (
DateTimePrinterParser pp :
printerParsers) {
if (
pp.
format(
context,
buf) == false) {
buf.
setLength(
length); // reset buffer
return true;
}
}
} finally {
if (
optional) {
context.
endOptional();
}
}
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
if (
optional) {
context.
startOptional();
int
pos =
position;
for (
DateTimePrinterParser pp :
printerParsers) {
pos =
pp.
parse(
context,
text,
pos);
if (
pos < 0) {
context.
endOptional(false);
return
position; // return original position
}
}
context.
endOptional(true);
return
pos;
} else {
for (
DateTimePrinterParser pp :
printerParsers) {
position =
pp.
parse(
context,
text,
position);
if (
position < 0) {
break;
}
}
return
position;
}
}
@
Override
public
String toString() {
StringBuilder buf = new
StringBuilder();
if (
printerParsers != null) {
buf.
append(
optional ? "[" : "(");
for (
DateTimePrinterParser pp :
printerParsers) {
buf.
append(
pp);
}
buf.
append(
optional ? "]" : ")");
}
return
buf.
toString();
}
}
//-----------------------------------------------------------------------
/**
* Pads the output to a fixed width.
*/
static final class
PadPrinterParserDecorator implements
DateTimePrinterParser {
private final
DateTimePrinterParser printerParser;
private final int
padWidth;
private final char
padChar;
/**
* Constructor.
*
* @param printerParser the printer, not null
* @param padWidth the width to pad to, 1 or greater
* @param padChar the pad character
*/
PadPrinterParserDecorator(
DateTimePrinterParser printerParser, int
padWidth, char
padChar) {
// input checked by DateTimeFormatterBuilder
this.
printerParser =
printerParser;
this.
padWidth =
padWidth;
this.
padChar =
padChar;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
int
preLen =
buf.
length();
if (
printerParser.
format(
context,
buf) == false) {
return false;
}
int
len =
buf.
length() -
preLen;
if (
len >
padWidth) {
throw new
DateTimeException(
"Cannot print as output of " +
len + " characters exceeds pad width of " +
padWidth);
}
for (int
i = 0;
i <
padWidth -
len;
i++) {
buf.
insert(
preLen,
padChar);
}
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
// cache context before changed by decorated parser
final boolean
strict =
context.
isStrict();
// parse
if (
position >
text.
length()) {
throw new
IndexOutOfBoundsException();
}
if (
position ==
text.
length()) {
return ~
position; // no more characters in the string
}
int
endPos =
position +
padWidth;
if (
endPos >
text.
length()) {
if (
strict) {
return ~
position; // not enough characters in the string to meet the parse width
}
endPos =
text.
length();
}
int
pos =
position;
while (
pos <
endPos &&
context.
charEquals(
text.
charAt(
pos),
padChar)) {
pos++;
}
text =
text.
subSequence(0,
endPos);
int
resultPos =
printerParser.
parse(
context,
text,
pos);
if (
resultPos !=
endPos &&
strict) {
return ~(
position +
pos); // parse of decorated field didn't parse to the end
}
return
resultPos;
}
@
Override
public
String toString() {
return "Pad(" +
printerParser + "," +
padWidth + (
padChar == ' ' ? ")" : ",'" +
padChar + "')");
}
}
//-----------------------------------------------------------------------
/**
* Enumeration to apply simple parse settings.
*/
static enum
SettingsParser implements
DateTimePrinterParser {
SENSITIVE,
INSENSITIVE,
STRICT,
LENIENT;
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
return true; // nothing to do here
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
// using ordinals to avoid javac synthetic inner class
switch (
ordinal()) {
case 0:
context.
setCaseSensitive(true); break;
case 1:
context.
setCaseSensitive(false); break;
case 2:
context.
setStrict(true); break;
case 3:
context.
setStrict(false); break;
}
return
position;
}
@
Override
public
String toString() {
// using ordinals to avoid javac synthetic inner class
switch (
ordinal()) {
case 0: return "ParseCaseSensitive(true)";
case 1: return "ParseCaseSensitive(false)";
case 2: return "ParseStrict(true)";
case 3: return "ParseStrict(false)";
}
throw new
IllegalStateException("Unreachable");
}
}
//-----------------------------------------------------------------------
/**
* Defaults a value into the parse if not currently present.
*/
static class
DefaultValueParser implements
DateTimePrinterParser {
private final
TemporalField field;
private final long
value;
DefaultValueParser(
TemporalField field, long
value) {
this.
field =
field;
this.
value =
value;
}
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
return true;
}
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
if (
context.
getParsed(
field) == null) {
context.
setParsedField(
field,
value,
position,
position);
}
return
position;
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a character literal.
*/
static final class
CharLiteralPrinterParser implements
DateTimePrinterParser {
private final char
literal;
CharLiteralPrinterParser(char
literal) {
this.
literal =
literal;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
buf.
append(
literal);
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
length =
text.
length();
if (
position ==
length) {
return ~
position;
}
char
ch =
text.
charAt(
position);
if (
ch !=
literal) {
if (
context.
isCaseSensitive() ||
(
Character.
toUpperCase(
ch) !=
Character.
toUpperCase(
literal) &&
Character.
toLowerCase(
ch) !=
Character.
toLowerCase(
literal))) {
return ~
position;
}
}
return
position + 1;
}
@
Override
public
String toString() {
if (
literal == '\'') {
return "''";
}
return "'" +
literal + "'";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a string literal.
*/
static final class
StringLiteralPrinterParser implements
DateTimePrinterParser {
private final
String literal;
StringLiteralPrinterParser(
String literal) {
this.
literal =
literal; // validated by caller
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
buf.
append(
literal);
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
length =
text.
length();
if (
position >
length ||
position < 0) {
throw new
IndexOutOfBoundsException();
}
if (
context.
subSequenceEquals(
text,
position,
literal, 0,
literal.
length()) == false) {
return ~
position;
}
return
position +
literal.
length();
}
@
Override
public
String toString() {
String converted =
literal.
replace("'", "''");
return "'" +
converted + "'";
}
}
//-----------------------------------------------------------------------
/**
* Prints and parses a numeric date-time field with optional padding.
*/
static class
NumberPrinterParser implements
DateTimePrinterParser {
/**
* Array of 10 to the power of n.
*/
static final long[]
EXCEED_POINTS = new long[] {
0L,
10L,
100L,
1000L,
10000L,
100000L,
1000000L,
10000000L,
100000000L,
1000000000L,
10000000000L,
};
final
TemporalField field;
final int
minWidth;
final int
maxWidth;
private final
SignStyle signStyle;
final int
subsequentWidth;
/**
* Constructor.
*
* @param field the field to format, not null
* @param minWidth the minimum field width, from 1 to 19
* @param maxWidth the maximum field width, from minWidth to 19
* @param signStyle the positive/negative sign style, not null
*/
NumberPrinterParser(
TemporalField field, int
minWidth, int
maxWidth,
SignStyle signStyle) {
// validated by caller
this.
field =
field;
this.
minWidth =
minWidth;
this.
maxWidth =
maxWidth;
this.
signStyle =
signStyle;
this.
subsequentWidth = 0;
}
/**
* Constructor.
*
* @param field the field to format, not null
* @param minWidth the minimum field width, from 1 to 19
* @param maxWidth the maximum field width, from minWidth to 19
* @param signStyle the positive/negative sign style, not null
* @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater,
* -1 if fixed width due to active adjacent parsing
*/
protected
NumberPrinterParser(
TemporalField field, int
minWidth, int
maxWidth,
SignStyle signStyle, int
subsequentWidth) {
// validated by caller
this.
field =
field;
this.
minWidth =
minWidth;
this.
maxWidth =
maxWidth;
this.
signStyle =
signStyle;
this.
subsequentWidth =
subsequentWidth;
}
/**
* Returns a new instance with fixed width flag set.
*
* @return a new updated printer-parser, not null
*/
NumberPrinterParser withFixedWidth() {
if (
subsequentWidth == -1) {
return this;
}
return new
NumberPrinterParser(
field,
minWidth,
maxWidth,
signStyle, -1);
}
/**
* Returns a new instance with an updated subsequent width.
*
* @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater
* @return a new updated printer-parser, not null
*/
NumberPrinterParser withSubsequentWidth(int
subsequentWidth) {
return new
NumberPrinterParser(
field,
minWidth,
maxWidth,
signStyle, this.
subsequentWidth +
subsequentWidth);
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Long valueLong =
context.
getValue(
field);
if (
valueLong == null) {
return false;
}
long
value =
getValue(
context,
valueLong);
DecimalStyle decimalStyle =
context.
getDecimalStyle();
String str = (
value ==
Long.
MIN_VALUE ? "9223372036854775808" :
Long.
toString(
Math.
abs(
value)));
if (
str.
length() >
maxWidth) {
throw new
DateTimeException("Field " +
field +
" cannot be printed as the value " +
value +
" exceeds the maximum print width of " +
maxWidth);
}
str =
decimalStyle.
convertNumberToI18N(
str);
if (
value >= 0) {
switch (
signStyle) {
case
EXCEEDS_PAD:
if (
minWidth < 19 &&
value >=
EXCEED_POINTS[
minWidth]) {
buf.
append(
decimalStyle.
getPositiveSign());
}
break;
case
ALWAYS:
buf.
append(
decimalStyle.
getPositiveSign());
break;
}
} else {
switch (
signStyle) {
case
NORMAL:
case
EXCEEDS_PAD:
case
ALWAYS:
buf.
append(
decimalStyle.
getNegativeSign());
break;
case
NOT_NEGATIVE:
throw new
DateTimeException("Field " +
field +
" cannot be printed as the value " +
value +
" cannot be negative according to the SignStyle");
}
}
for (int
i = 0;
i <
minWidth -
str.
length();
i++) {
buf.
append(
decimalStyle.
getZeroDigit());
}
buf.
append(
str);
return true;
}
/**
* Gets the value to output.
*
* @param context the context
* @param value the value of the field, not null
* @return the value
*/
long
getValue(
DateTimePrintContext context, long
value) {
return
value;
}
/**
* For NumberPrinterParser, the width is fixed depending on the
* minWidth, maxWidth, signStyle and whether subsequent fields are fixed.
* @param context the context
* @return true if the field is fixed width
* @see DateTimeFormatterBuilder#appendValue(java.time.temporal.TemporalField, int)
*/
boolean
isFixedWidth(
DateTimeParseContext context) {
return
subsequentWidth == -1 ||
(
subsequentWidth > 0 &&
minWidth ==
maxWidth &&
signStyle ==
SignStyle.
NOT_NEGATIVE);
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
length =
text.
length();
if (
position ==
length) {
return ~
position;
}
char
sign =
text.
charAt(
position); // IOOBE if invalid position
boolean
negative = false;
boolean
positive = false;
if (
sign ==
context.
getDecimalStyle().
getPositiveSign()) {
if (
signStyle.
parse(true,
context.
isStrict(),
minWidth ==
maxWidth) == false) {
return ~
position;
}
positive = true;
position++;
} else if (
sign ==
context.
getDecimalStyle().
getNegativeSign()) {
if (
signStyle.
parse(false,
context.
isStrict(),
minWidth ==
maxWidth) == false) {
return ~
position;
}
negative = true;
position++;
} else {
if (
signStyle ==
SignStyle.
ALWAYS &&
context.
isStrict()) {
return ~
position;
}
}
int
effMinWidth = (
context.
isStrict() ||
isFixedWidth(
context) ?
minWidth : 1);
int
minEndPos =
position +
effMinWidth;
if (
minEndPos >
length) {
return ~
position;
}
int
effMaxWidth = (
context.
isStrict() ||
isFixedWidth(
context) ?
maxWidth : 9) +
Math.
max(
subsequentWidth, 0);
long
total = 0;
BigInteger totalBig = null;
int
pos =
position;
for (int
pass = 0;
pass < 2;
pass++) {
int
maxEndPos =
Math.
min(
pos +
effMaxWidth,
length);
while (
pos <
maxEndPos) {
char
ch =
text.
charAt(
pos++);
int
digit =
context.
getDecimalStyle().
convertToDigit(
ch);
if (
digit < 0) {
pos--;
if (
pos <
minEndPos) {
return ~
position; // need at least min width digits
}
break;
}
if ((
pos -
position) > 18) {
if (
totalBig == null) {
totalBig =
BigInteger.
valueOf(
total);
}
totalBig =
totalBig.
multiply(
BigInteger.
TEN).
add(
BigInteger.
valueOf(
digit));
} else {
total =
total * 10 +
digit;
}
}
if (
subsequentWidth > 0 &&
pass == 0) {
// re-parse now we know the correct width
int
parseLen =
pos -
position;
effMaxWidth =
Math.
max(
effMinWidth,
parseLen -
subsequentWidth);
pos =
position;
total = 0;
totalBig = null;
} else {
break;
}
}
if (
negative) {
if (
totalBig != null) {
if (
totalBig.
equals(
BigInteger.
ZERO) &&
context.
isStrict()) {
return ~(
position - 1); // minus zero not allowed
}
totalBig =
totalBig.
negate();
} else {
if (
total == 0 &&
context.
isStrict()) {
return ~(
position - 1); // minus zero not allowed
}
total = -
total;
}
} else if (
signStyle ==
SignStyle.
EXCEEDS_PAD &&
context.
isStrict()) {
int
parseLen =
pos -
position;
if (
positive) {
if (
parseLen <=
minWidth) {
return ~(
position - 1); // '+' only parsed if minWidth exceeded
}
} else {
if (
parseLen >
minWidth) {
return ~
position; // '+' must be parsed if minWidth exceeded
}
}
}
if (
totalBig != null) {
if (
totalBig.
bitLength() > 63) {
// overflow, parse 1 less digit
totalBig =
totalBig.
divide(
BigInteger.
TEN);
pos--;
}
return
setValue(
context,
totalBig.
longValue(),
position,
pos);
}
return
setValue(
context,
total,
position,
pos);
}
/**
* Stores the value.
*
* @param context the context to store into, not null
* @param value the value
* @param errorPos the position of the field being parsed
* @param successPos the position after the field being parsed
* @return the new position
*/
int
setValue(
DateTimeParseContext context, long
value, int
errorPos, int
successPos) {
return
context.
setParsedField(
field,
value,
errorPos,
successPos);
}
@
Override
public
String toString() {
if (
minWidth == 1 &&
maxWidth == 19 &&
signStyle ==
SignStyle.
NORMAL) {
return "Value(" +
field + ")";
}
if (
minWidth ==
maxWidth &&
signStyle ==
SignStyle.
NOT_NEGATIVE) {
return "Value(" +
field + "," +
minWidth + ")";
}
return "Value(" +
field + "," +
minWidth + "," +
maxWidth + "," +
signStyle + ")";
}
}
//-----------------------------------------------------------------------
/**
* Prints and parses a reduced numeric date-time field.
*/
static final class
ReducedPrinterParser extends
NumberPrinterParser {
/**
* The base date for reduced value parsing.
*/
static final
LocalDate BASE_DATE =
LocalDate.
of(2000, 1, 1);
private final int
baseValue;
private final
ChronoLocalDate baseDate;
/**
* Constructor.
*
* @param field the field to format, validated not null
* @param minWidth the minimum field width, from 1 to 10
* @param maxWidth the maximum field width, from 1 to 10
* @param baseValue the base value
* @param baseDate the base date
*/
ReducedPrinterParser(
TemporalField field, int
minWidth, int
maxWidth,
int
baseValue,
ChronoLocalDate baseDate) {
this(
field,
minWidth,
maxWidth,
baseValue,
baseDate, 0);
if (
minWidth < 1 ||
minWidth > 10) {
throw new
IllegalArgumentException("The minWidth must be from 1 to 10 inclusive but was " +
minWidth);
}
if (
maxWidth < 1 ||
maxWidth > 10) {
throw new
IllegalArgumentException("The maxWidth must be from 1 to 10 inclusive but was " +
minWidth);
}
if (
maxWidth <
minWidth) {
throw new
IllegalArgumentException("Maximum width must exceed or equal the minimum width but " +
maxWidth + " < " +
minWidth);
}
if (
baseDate == null) {
if (
field.
range().
isValidValue(
baseValue) == false) {
throw new
IllegalArgumentException("The base value must be within the range of the field");
}
if ((((long)
baseValue) +
EXCEED_POINTS[
maxWidth]) >
Integer.
MAX_VALUE) {
throw new
DateTimeException("Unable to add printer-parser as the range exceeds the capacity of an int");
}
}
}
/**
* Constructor.
* The arguments have already been checked.
*
* @param field the field to format, validated not null
* @param minWidth the minimum field width, from 1 to 10
* @param maxWidth the maximum field width, from 1 to 10
* @param baseValue the base value
* @param baseDate the base date
* @param subsequentWidth the subsequentWidth for this instance
*/
private
ReducedPrinterParser(
TemporalField field, int
minWidth, int
maxWidth,
int
baseValue,
ChronoLocalDate baseDate, int
subsequentWidth) {
super(
field,
minWidth,
maxWidth,
SignStyle.
NOT_NEGATIVE,
subsequentWidth);
this.
baseValue =
baseValue;
this.
baseDate =
baseDate;
}
@
Override
long
getValue(
DateTimePrintContext context, long
value) {
long
absValue =
Math.
abs(
value);
int
baseValue = this.
baseValue;
if (
baseDate != null) {
Chronology chrono =
Chronology.
from(
context.
getTemporal());
baseValue =
chrono.
date(
baseDate).
get(
field);
}
if (
value >=
baseValue &&
value <
baseValue +
EXCEED_POINTS[
minWidth]) {
// Use the reduced value if it fits in minWidth
return
absValue %
EXCEED_POINTS[
minWidth];
}
// Otherwise truncate to fit in maxWidth
return
absValue %
EXCEED_POINTS[
maxWidth];
}
@
Override
int
setValue(
DateTimeParseContext context, long
value, int
errorPos, int
successPos) {
int
baseValue = this.
baseValue;
if (
baseDate != null) {
Chronology chrono =
context.
getEffectiveChronology();
baseValue =
chrono.
date(
baseDate).
get(
field);
// In case the Chronology is changed later, add a callback when/if it changes
final long
initialValue =
value;
context.
addChronoChangedListener(
(
_unused) -> {
/* Repeat the set of the field using the current Chronology
* The success/error position is ignored because the value is
* intentionally being overwritten.
*/
setValue(
context,
initialValue,
errorPos,
successPos);
});
}
int
parseLen =
successPos -
errorPos;
if (
parseLen ==
minWidth &&
value >= 0) {
long
range =
EXCEED_POINTS[
minWidth];
long
lastPart =
baseValue %
range;
long
basePart =
baseValue -
lastPart;
if (
baseValue > 0) {
value =
basePart +
value;
} else {
value =
basePart -
value;
}
if (
value <
baseValue) {
value +=
range;
}
}
return
context.
setParsedField(
field,
value,
errorPos,
successPos);
}
/**
* Returns a new instance with fixed width flag set.
*
* @return a new updated printer-parser, not null
*/
@
Override
ReducedPrinterParser withFixedWidth() {
if (
subsequentWidth == -1) {
return this;
}
return new
ReducedPrinterParser(
field,
minWidth,
maxWidth,
baseValue,
baseDate, -1);
}
/**
* Returns a new instance with an updated subsequent width.
*
* @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater
* @return a new updated printer-parser, not null
*/
@
Override
ReducedPrinterParser withSubsequentWidth(int
subsequentWidth) {
return new
ReducedPrinterParser(
field,
minWidth,
maxWidth,
baseValue,
baseDate,
this.
subsequentWidth +
subsequentWidth);
}
/**
* For a ReducedPrinterParser, fixed width is false if the mode is strict,
* otherwise it is set as for NumberPrinterParser.
* @param context the context
* @return if the field is fixed width
* @see DateTimeFormatterBuilder#appendValueReduced(java.time.temporal.TemporalField, int, int, int)
*/
@
Override
boolean
isFixedWidth(
DateTimeParseContext context) {
if (
context.
isStrict() == false) {
return false;
}
return super.isFixedWidth(
context);
}
@
Override
public
String toString() {
return "ReducedValue(" +
field + "," +
minWidth + "," +
maxWidth + "," + (
baseDate != null ?
baseDate :
baseValue) + ")";
}
}
//-----------------------------------------------------------------------
/**
* Prints and parses a numeric date-time field with optional padding.
*/
static final class
FractionPrinterParser implements
DateTimePrinterParser {
private final
TemporalField field;
private final int
minWidth;
private final int
maxWidth;
private final boolean
decimalPoint;
/**
* Constructor.
*
* @param field the field to output, not null
* @param minWidth the minimum width to output, from 0 to 9
* @param maxWidth the maximum width to output, from 0 to 9
* @param decimalPoint whether to output the localized decimal point symbol
*/
FractionPrinterParser(
TemporalField field, int
minWidth, int
maxWidth, boolean
decimalPoint) {
Objects.
requireNonNull(
field, "field");
if (
field.
range().
isFixed() == false) {
throw new
IllegalArgumentException("Field must have a fixed set of values: " +
field);
}
if (
minWidth < 0 ||
minWidth > 9) {
throw new
IllegalArgumentException("Minimum width must be from 0 to 9 inclusive but was " +
minWidth);
}
if (
maxWidth < 1 ||
maxWidth > 9) {
throw new
IllegalArgumentException("Maximum width must be from 1 to 9 inclusive but was " +
maxWidth);
}
if (
maxWidth <
minWidth) {
throw new
IllegalArgumentException("Maximum width must exceed or equal the minimum width but " +
maxWidth + " < " +
minWidth);
}
this.
field =
field;
this.
minWidth =
minWidth;
this.
maxWidth =
maxWidth;
this.
decimalPoint =
decimalPoint;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Long value =
context.
getValue(
field);
if (
value == null) {
return false;
}
DecimalStyle decimalStyle =
context.
getDecimalStyle();
BigDecimal fraction =
convertToFraction(
value);
if (
fraction.
scale() == 0) { // scale is zero if value is zero
if (
minWidth > 0) {
if (
decimalPoint) {
buf.
append(
decimalStyle.
getDecimalSeparator());
}
for (int
i = 0;
i <
minWidth;
i++) {
buf.
append(
decimalStyle.
getZeroDigit());
}
}
} else {
int
outputScale =
Math.
min(
Math.
max(
fraction.
scale(),
minWidth),
maxWidth);
fraction =
fraction.
setScale(
outputScale,
RoundingMode.
FLOOR);
String str =
fraction.
toPlainString().
substring(2);
str =
decimalStyle.
convertNumberToI18N(
str);
if (
decimalPoint) {
buf.
append(
decimalStyle.
getDecimalSeparator());
}
buf.
append(
str);
}
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
effectiveMin = (
context.
isStrict() ?
minWidth : 0);
int
effectiveMax = (
context.
isStrict() ?
maxWidth : 9);
int
length =
text.
length();
if (
position ==
length) {
// valid if whole field is optional, invalid if minimum width
return (
effectiveMin > 0 ? ~
position :
position);
}
if (
decimalPoint) {
if (
text.
charAt(
position) !=
context.
getDecimalStyle().
getDecimalSeparator()) {
// valid if whole field is optional, invalid if minimum width
return (
effectiveMin > 0 ? ~
position :
position);
}
position++;
}
int
minEndPos =
position +
effectiveMin;
if (
minEndPos >
length) {
return ~
position; // need at least min width digits
}
int
maxEndPos =
Math.
min(
position +
effectiveMax,
length);
int
total = 0; // can use int because we are only parsing up to 9 digits
int
pos =
position;
while (
pos <
maxEndPos) {
char
ch =
text.
charAt(
pos++);
int
digit =
context.
getDecimalStyle().
convertToDigit(
ch);
if (
digit < 0) {
if (
pos <
minEndPos) {
return ~
position; // need at least min width digits
}
pos--;
break;
}
total =
total * 10 +
digit;
}
BigDecimal fraction = new
BigDecimal(
total).
movePointLeft(
pos -
position);
long
value =
convertFromFraction(
fraction);
return
context.
setParsedField(
field,
value,
position,
pos);
}
/**
* Converts a value for this field to a fraction between 0 and 1.
* <p>
* The fractional value is between 0 (inclusive) and 1 (exclusive).
* It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed.
* The fraction is obtained by calculation from the field range using 9 decimal
* places and a rounding mode of {@link RoundingMode#FLOOR FLOOR}.
* The calculation is inaccurate if the values do not run continuously from smallest to largest.
* <p>
* For example, the second-of-minute value of 15 would be returned as 0.25,
* assuming the standard definition of 60 seconds in a minute.
*
* @param value the value to convert, must be valid for this rule
* @return the value as a fraction within the range, from 0 to 1, not null
* @throws DateTimeException if the value cannot be converted to a fraction
*/
private
BigDecimal convertToFraction(long
value) {
ValueRange range =
field.
range();
range.
checkValidValue(
value,
field);
BigDecimal minBD =
BigDecimal.
valueOf(
range.
getMinimum());
BigDecimal rangeBD =
BigDecimal.
valueOf(
range.
getMaximum()).
subtract(
minBD).
add(
BigDecimal.
ONE);
BigDecimal valueBD =
BigDecimal.
valueOf(
value).
subtract(
minBD);
BigDecimal fraction =
valueBD.
divide(
rangeBD, 9,
RoundingMode.
FLOOR);
// stripTrailingZeros bug
return
fraction.
compareTo(
BigDecimal.
ZERO) == 0 ?
BigDecimal.
ZERO :
fraction.
stripTrailingZeros();
}
/**
* Converts a fraction from 0 to 1 for this field to a value.
* <p>
* The fractional value must be between 0 (inclusive) and 1 (exclusive).
* It can only be returned if the {@link java.time.temporal.TemporalField#range() value range} is fixed.
* The value is obtained by calculation from the field range and a rounding
* mode of {@link RoundingMode#FLOOR FLOOR}.
* The calculation is inaccurate if the values do not run continuously from smallest to largest.
* <p>
* For example, the fractional second-of-minute of 0.25 would be converted to 15,
* assuming the standard definition of 60 seconds in a minute.
*
* @param fraction the fraction to convert, not null
* @return the value of the field, valid for this rule
* @throws DateTimeException if the value cannot be converted
*/
private long
convertFromFraction(
BigDecimal fraction) {
ValueRange range =
field.
range();
BigDecimal minBD =
BigDecimal.
valueOf(
range.
getMinimum());
BigDecimal rangeBD =
BigDecimal.
valueOf(
range.
getMaximum()).
subtract(
minBD).
add(
BigDecimal.
ONE);
BigDecimal valueBD =
fraction.
multiply(
rangeBD).
setScale(0,
RoundingMode.
FLOOR).
add(
minBD);
return
valueBD.
longValueExact();
}
@
Override
public
String toString() {
String decimal = (
decimalPoint ? ",DecimalPoint" : "");
return "Fraction(" +
field + "," +
minWidth + "," +
maxWidth +
decimal + ")";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses field text.
*/
static final class
TextPrinterParser implements
DateTimePrinterParser {
private final
TemporalField field;
private final
TextStyle textStyle;
private final
DateTimeTextProvider provider;
/**
* The cached number printer parser.
* Immutable and volatile, so no synchronization needed.
*/
private volatile
NumberPrinterParser numberPrinterParser;
/**
* Constructor.
*
* @param field the field to output, not null
* @param textStyle the text style, not null
* @param provider the text provider, not null
*/
TextPrinterParser(
TemporalField field,
TextStyle textStyle,
DateTimeTextProvider provider) {
// validated by caller
this.
field =
field;
this.
textStyle =
textStyle;
this.
provider =
provider;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Long value =
context.
getValue(
field);
if (
value == null) {
return false;
}
String text;
Chronology chrono =
context.
getTemporal().
query(
TemporalQueries.
chronology());
if (
chrono == null ||
chrono ==
IsoChronology.
INSTANCE) {
text =
provider.
getText(
field,
value,
textStyle,
context.
getLocale());
} else {
text =
provider.
getText(
chrono,
field,
value,
textStyle,
context.
getLocale());
}
if (
text == null) {
return
numberPrinterParser().
format(
context,
buf);
}
buf.
append(
text);
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence parseText, int
position) {
int
length =
parseText.
length();
if (
position < 0 ||
position >
length) {
throw new
IndexOutOfBoundsException();
}
TextStyle style = (
context.
isStrict() ?
textStyle : null);
Chronology chrono =
context.
getEffectiveChronology();
Iterator<
Entry<
String,
Long>>
it;
if (
chrono == null ||
chrono ==
IsoChronology.
INSTANCE) {
it =
provider.
getTextIterator(
field,
style,
context.
getLocale());
} else {
it =
provider.
getTextIterator(
chrono,
field,
style,
context.
getLocale());
}
if (
it != null) {
while (
it.
hasNext()) {
Entry<
String,
Long>
entry =
it.
next();
String itText =
entry.
getKey();
if (
context.
subSequenceEquals(
itText, 0,
parseText,
position,
itText.
length())) {
return
context.
setParsedField(
field,
entry.
getValue(),
position,
position +
itText.
length());
}
}
if (
context.
isStrict()) {
return ~
position;
}
}
return
numberPrinterParser().
parse(
context,
parseText,
position);
}
/**
* Create and cache a number printer parser.
* @return the number printer parser for this field, not null
*/
private
NumberPrinterParser numberPrinterParser() {
if (
numberPrinterParser == null) {
numberPrinterParser = new
NumberPrinterParser(
field, 1, 19,
SignStyle.
NORMAL);
}
return
numberPrinterParser;
}
@
Override
public
String toString() {
if (
textStyle ==
TextStyle.
FULL) {
return "Text(" +
field + ")";
}
return "Text(" +
field + "," +
textStyle + ")";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses an ISO-8601 instant.
*/
static final class
InstantPrinterParser implements
DateTimePrinterParser {
// days in a 400 year cycle = 146097
// days in a 10,000 year cycle = 146097 * 25
// seconds per day = 86400
private static final long
SECONDS_PER_10000_YEARS = 146097L * 25L * 86400L;
private static final long
SECONDS_0000_TO_1970 = ((146097L * 5L) - (30L * 365L + 7L)) * 86400L;
private final int
fractionalDigits;
InstantPrinterParser(int
fractionalDigits) {
this.
fractionalDigits =
fractionalDigits;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
// use INSTANT_SECONDS, thus this code is not bound by Instant.MAX
Long inSecs =
context.
getValue(
INSTANT_SECONDS);
Long inNanos = null;
if (
context.
getTemporal().
isSupported(
NANO_OF_SECOND)) {
inNanos =
context.
getTemporal().
getLong(
NANO_OF_SECOND);
}
if (
inSecs == null) {
return false;
}
long
inSec =
inSecs;
int
inNano =
NANO_OF_SECOND.
checkValidIntValue(
inNanos != null ?
inNanos : 0);
// format mostly using LocalDateTime.toString
if (
inSec >= -
SECONDS_0000_TO_1970) {
// current era
long
zeroSecs =
inSec -
SECONDS_PER_10000_YEARS +
SECONDS_0000_TO_1970;
long
hi =
Math.
floorDiv(
zeroSecs,
SECONDS_PER_10000_YEARS) + 1;
long
lo =
Math.
floorMod(
zeroSecs,
SECONDS_PER_10000_YEARS);
LocalDateTime ldt =
LocalDateTime.
ofEpochSecond(
lo -
SECONDS_0000_TO_1970, 0,
ZoneOffset.
UTC);
if (
hi > 0) {
buf.
append('+').
append(
hi);
}
buf.
append(
ldt);
if (
ldt.
getSecond() == 0) {
buf.
append(":00");
}
} else {
// before current era
long
zeroSecs =
inSec +
SECONDS_0000_TO_1970;
long
hi =
zeroSecs /
SECONDS_PER_10000_YEARS;
long
lo =
zeroSecs %
SECONDS_PER_10000_YEARS;
LocalDateTime ldt =
LocalDateTime.
ofEpochSecond(
lo -
SECONDS_0000_TO_1970, 0,
ZoneOffset.
UTC);
int
pos =
buf.
length();
buf.
append(
ldt);
if (
ldt.
getSecond() == 0) {
buf.
append(":00");
}
if (
hi < 0) {
if (
ldt.
getYear() == -10_000) {
buf.
replace(
pos,
pos + 2,
Long.
toString(
hi - 1));
} else if (
lo == 0) {
buf.
insert(
pos,
hi);
} else {
buf.
insert(
pos + 1,
Math.
abs(
hi));
}
}
}
// add fraction
if ((
fractionalDigits < 0 &&
inNano > 0) ||
fractionalDigits > 0) {
buf.
append('.');
int
div = 100_000_000;
for (int
i = 0; ((
fractionalDigits == -1 &&
inNano > 0) ||
(
fractionalDigits == -2 && (
inNano > 0 || (
i % 3) != 0)) ||
i <
fractionalDigits);
i++) {
int
digit =
inNano /
div;
buf.
append((char) (
digit + '0'));
inNano =
inNano - (
digit *
div);
div =
div / 10;
}
}
buf.
append('Z');
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
// new context to avoid overwriting fields like year/month/day
int
minDigits = (
fractionalDigits < 0 ? 0 :
fractionalDigits);
int
maxDigits = (
fractionalDigits < 0 ? 9 :
fractionalDigits);
CompositePrinterParser parser = new
DateTimeFormatterBuilder()
.
append(
DateTimeFormatter.
ISO_LOCAL_DATE).
appendLiteral('T')
.
appendValue(
HOUR_OF_DAY, 2).
appendLiteral(':')
.
appendValue(
MINUTE_OF_HOUR, 2).
appendLiteral(':')
.
appendValue(
SECOND_OF_MINUTE, 2)
.
appendFraction(
NANO_OF_SECOND,
minDigits,
maxDigits, true)
.
appendLiteral('Z')
.
toFormatter().
toPrinterParser(false);
DateTimeParseContext newContext =
context.
copy();
int
pos =
parser.
parse(
newContext,
text,
position);
if (
pos < 0) {
return
pos;
}
// parser restricts most fields to 2 digits, so definitely int
// correctly parsed nano is also guaranteed to be valid
long
yearParsed =
newContext.
getParsed(
YEAR);
int
month =
newContext.
getParsed(
MONTH_OF_YEAR).
intValue();
int
day =
newContext.
getParsed(
DAY_OF_MONTH).
intValue();
int
hour =
newContext.
getParsed(
HOUR_OF_DAY).
intValue();
int
min =
newContext.
getParsed(
MINUTE_OF_HOUR).
intValue();
Long secVal =
newContext.
getParsed(
SECOND_OF_MINUTE);
Long nanoVal =
newContext.
getParsed(
NANO_OF_SECOND);
int
sec = (
secVal != null ?
secVal.
intValue() : 0);
int
nano = (
nanoVal != null ?
nanoVal.
intValue() : 0);
int
days = 0;
if (
hour == 24 &&
min == 0 &&
sec == 0 &&
nano == 0) {
hour = 0;
days = 1;
} else if (
hour == 23 &&
min == 59 &&
sec == 60) {
context.
setParsedLeapSecond();
sec = 59;
}
int
year = (int)
yearParsed % 10_000;
long
instantSecs;
try {
LocalDateTime ldt =
LocalDateTime.
of(
year,
month,
day,
hour,
min,
sec, 0).
plusDays(
days);
instantSecs =
ldt.
toEpochSecond(
ZoneOffset.
UTC);
instantSecs +=
Math.
multiplyExact(
yearParsed / 10_000L,
SECONDS_PER_10000_YEARS);
} catch (
RuntimeException ex) {
return ~
position;
}
int
successPos =
pos;
successPos =
context.
setParsedField(
INSTANT_SECONDS,
instantSecs,
position,
successPos);
return
context.
setParsedField(
NANO_OF_SECOND,
nano,
position,
successPos);
}
@
Override
public
String toString() {
return "Instant()";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses an offset ID.
*/
static final class
OffsetIdPrinterParser implements
DateTimePrinterParser {
static final
String[]
PATTERNS = new
String[] {
"+HH", "+HHmm", "+HH:mm", "+HHMM", "+HH:MM", "+HHMMss", "+HH:MM:ss", "+HHMMSS", "+HH:MM:SS",
}; // order used in pattern builder
static final
OffsetIdPrinterParser INSTANCE_ID_Z = new
OffsetIdPrinterParser("+HH:MM:ss", "Z");
static final
OffsetIdPrinterParser INSTANCE_ID_ZERO = new
OffsetIdPrinterParser("+HH:MM:ss", "0");
private final
String noOffsetText;
private final int
type;
/**
* Constructor.
*
* @param pattern the pattern
* @param noOffsetText the text to use for UTC, not null
*/
OffsetIdPrinterParser(
String pattern,
String noOffsetText) {
Objects.
requireNonNull(
pattern, "pattern");
Objects.
requireNonNull(
noOffsetText, "noOffsetText");
this.
type =
checkPattern(
pattern);
this.
noOffsetText =
noOffsetText;
}
private int
checkPattern(
String pattern) {
for (int
i = 0;
i <
PATTERNS.length;
i++) {
if (
PATTERNS[
i].
equals(
pattern)) {
return
i;
}
}
throw new
IllegalArgumentException("Invalid zone offset pattern: " +
pattern);
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Long offsetSecs =
context.
getValue(
OFFSET_SECONDS);
if (
offsetSecs == null) {
return false;
}
int
totalSecs =
Math.
toIntExact(
offsetSecs);
if (
totalSecs == 0) {
buf.
append(
noOffsetText);
} else {
int
absHours =
Math.
abs((
totalSecs / 3600) % 100); // anything larger than 99 silently dropped
int
absMinutes =
Math.
abs((
totalSecs / 60) % 60);
int
absSeconds =
Math.
abs(
totalSecs % 60);
int
bufPos =
buf.
length();
int
output =
absHours;
buf.
append(
totalSecs < 0 ? "-" : "+")
.
append((char) (
absHours / 10 + '0')).
append((char) (
absHours % 10 + '0'));
if (
type >= 3 || (
type >= 1 &&
absMinutes > 0)) {
buf.
append((
type % 2) == 0 ? ":" : "")
.
append((char) (
absMinutes / 10 + '0')).
append((char) (
absMinutes % 10 + '0'));
output +=
absMinutes;
if (
type >= 7 || (
type >= 5 &&
absSeconds > 0)) {
buf.
append((
type % 2) == 0 ? ":" : "")
.
append((char) (
absSeconds / 10 + '0')).
append((char) (
absSeconds % 10 + '0'));
output +=
absSeconds;
}
}
if (
output == 0) {
buf.
setLength(
bufPos);
buf.
append(
noOffsetText);
}
}
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
length =
text.
length();
int
noOffsetLen =
noOffsetText.
length();
if (
noOffsetLen == 0) {
if (
position ==
length) {
return
context.
setParsedField(
OFFSET_SECONDS, 0,
position,
position);
}
} else {
if (
position ==
length) {
return ~
position;
}
if (
context.
subSequenceEquals(
text,
position,
noOffsetText, 0,
noOffsetLen)) {
return
context.
setParsedField(
OFFSET_SECONDS, 0,
position,
position +
noOffsetLen);
}
}
// parse normal plus/minus offset
char
sign =
text.
charAt(
position); // IOOBE if invalid position
if (
sign == '+' ||
sign == '-') {
// starts
int
negative = (
sign == '-' ? -1 : 1);
int[]
array = new int[4];
array[0] =
position + 1;
if ((
parseNumber(
array, 1,
text, true) ||
parseNumber(
array, 2,
text,
type >=3) ||
parseNumber(
array, 3,
text, false)) == false) {
// success
long
offsetSecs =
negative * (
array[1] * 3600L +
array[2] * 60L +
array[3]);
return
context.
setParsedField(
OFFSET_SECONDS,
offsetSecs,
position,
array[0]);
}
}
// handle special case of empty no offset text
if (
noOffsetLen == 0) {
return
context.
setParsedField(
OFFSET_SECONDS, 0,
position,
position +
noOffsetLen);
}
return ~
position;
}
/**
* Parse a two digit zero-prefixed number.
*
* @param array the array of parsed data, 0=pos,1=hours,2=mins,3=secs, not null
* @param arrayIndex the index to parse the value into
* @param parseText the offset ID, not null
* @param required whether this number is required
* @return true if an error occurred
*/
private boolean
parseNumber(int[]
array, int
arrayIndex,
CharSequence parseText, boolean
required) {
if ((
type + 3) / 2 <
arrayIndex) {
return false; // ignore seconds/minutes
}
int
pos =
array[0];
if ((
type % 2) == 0 &&
arrayIndex > 1) {
if (
pos + 1 >
parseText.
length() ||
parseText.
charAt(
pos) != ':') {
return
required;
}
pos++;
}
if (
pos + 2 >
parseText.
length()) {
return
required;
}
char
ch1 =
parseText.
charAt(
pos++);
char
ch2 =
parseText.
charAt(
pos++);
if (
ch1 < '0' ||
ch1 > '9' ||
ch2 < '0' ||
ch2 > '9') {
return
required;
}
int
value = (
ch1 - 48) * 10 + (
ch2 - 48);
if (
value < 0 ||
value > 59) {
return
required;
}
array[
arrayIndex] =
value;
array[0] =
pos;
return false;
}
@
Override
public
String toString() {
String converted =
noOffsetText.
replace("'", "''");
return "Offset(" +
PATTERNS[
type] + ",'" +
converted + "')";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses an offset ID.
*/
static final class
LocalizedOffsetIdPrinterParser implements
DateTimePrinterParser {
private final
TextStyle style;
/**
* Constructor.
*
* @param style the style, not null
*/
LocalizedOffsetIdPrinterParser(
TextStyle style) {
this.
style =
style;
}
private static
StringBuilder appendHMS(
StringBuilder buf, int
t) {
return
buf.
append((char)(
t / 10 + '0'))
.
append((char)(
t % 10 + '0'));
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Long offsetSecs =
context.
getValue(
OFFSET_SECONDS);
if (
offsetSecs == null) {
return false;
}
String gmtText = "GMT"; // TODO: get localized version of 'GMT'
if (
gmtText != null) {
buf.
append(
gmtText);
}
int
totalSecs =
Math.
toIntExact(
offsetSecs);
if (
totalSecs != 0) {
int
absHours =
Math.
abs((
totalSecs / 3600) % 100); // anything larger than 99 silently dropped
int
absMinutes =
Math.
abs((
totalSecs / 60) % 60);
int
absSeconds =
Math.
abs(
totalSecs % 60);
buf.
append(
totalSecs < 0 ? "-" : "+");
if (
style ==
TextStyle.
FULL) {
appendHMS(
buf,
absHours);
buf.
append(':');
appendHMS(
buf,
absMinutes);
if (
absSeconds != 0) {
buf.
append(':');
appendHMS(
buf,
absSeconds);
}
} else {
if (
absHours >= 10) {
buf.
append((char)(
absHours / 10 + '0'));
}
buf.
append((char)(
absHours % 10 + '0'));
if (
absMinutes != 0 ||
absSeconds != 0) {
buf.
append(':');
appendHMS(
buf,
absMinutes);
if (
absSeconds != 0) {
buf.
append(':');
appendHMS(
buf,
absSeconds);
}
}
}
}
return true;
}
int
getDigit(
CharSequence text, int
position) {
char
c =
text.
charAt(
position);
if (
c < '0' ||
c > '9') {
return -1;
}
return
c - '0';
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
pos =
position;
int
end =
pos +
text.
length();
String gmtText = "GMT"; // TODO: get localized version of 'GMT'
if (
gmtText != null) {
if (!
context.
subSequenceEquals(
text,
pos,
gmtText, 0,
gmtText.
length())) {
return ~
position;
}
pos +=
gmtText.
length();
}
// parse normal plus/minus offset
int
negative = 0;
if (
pos ==
end) {
return
context.
setParsedField(
OFFSET_SECONDS, 0,
position,
pos);
}
char
sign =
text.
charAt(
pos); // IOOBE if invalid position
if (
sign == '+') {
negative = 1;
} else if (
sign == '-') {
negative = -1;
} else {
return
context.
setParsedField(
OFFSET_SECONDS, 0,
position,
pos);
}
pos++;
int
h = 0;
int
m = 0;
int
s = 0;
if (
style ==
TextStyle.
FULL) {
int
h1 =
getDigit(
text,
pos++);
int
h2 =
getDigit(
text,
pos++);
if (
h1 < 0 ||
h2 < 0 ||
text.
charAt(
pos++) != ':') {
return ~
position;
}
h =
h1 * 10 +
h2;
int
m1 =
getDigit(
text,
pos++);
int
m2 =
getDigit(
text,
pos++);
if (
m1 < 0 ||
m2 < 0) {
return ~
position;
}
m =
m1 * 10 +
m2;
if (
pos + 2 <
end &&
text.
charAt(
pos) == ':') {
int
s1 =
getDigit(
text,
pos + 1);
int
s2 =
getDigit(
text,
pos + 2);
if (
s1 >= 0 &&
s2 >= 0) {
s =
s1 * 10 +
s2;
pos += 3;
}
}
} else {
h =
getDigit(
text,
pos++);
if (
h < 0) {
return ~
position;
}
if (
pos <
end) {
int
h2 =
getDigit(
text,
pos);
if (
h2 >=0) {
h =
h * 10 +
h2;
pos++;
}
if (
pos + 2 <
end &&
text.
charAt(
pos) == ':') {
if (
pos + 2 <
end &&
text.
charAt(
pos) == ':') {
int
m1 =
getDigit(
text,
pos + 1);
int
m2 =
getDigit(
text,
pos + 2);
if (
m1 >= 0 &&
m2 >= 0) {
m =
m1 * 10 +
m2;
pos += 3;
if (
pos + 2 <
end &&
text.
charAt(
pos) == ':') {
int
s1 =
getDigit(
text,
pos + 1);
int
s2 =
getDigit(
text,
pos + 2);
if (
s1 >= 0 &&
s2 >= 0) {
s =
s1 * 10 +
s2;
pos += 3;
}
}
}
}
}
}
}
long
offsetSecs =
negative * (
h * 3600L +
m * 60L +
s);
return
context.
setParsedField(
OFFSET_SECONDS,
offsetSecs,
position,
pos);
}
@
Override
public
String toString() {
return "LocalizedOffset(" +
style + ")";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a zone ID.
*/
static final class
ZoneTextPrinterParser extends
ZoneIdPrinterParser {
/** The text style to output. */
private final
TextStyle textStyle;
/** The preferred zoneid map */
private
Set<
String>
preferredZones;
ZoneTextPrinterParser(
TextStyle textStyle,
Set<
ZoneId>
preferredZones) {
super(
TemporalQueries.
zone(), "ZoneText(" +
textStyle + ")");
this.
textStyle =
Objects.
requireNonNull(
textStyle, "textStyle");
if (
preferredZones != null &&
preferredZones.
size() != 0) {
this.
preferredZones = new
HashSet<>();
for (
ZoneId id :
preferredZones) {
this.
preferredZones.
add(
id.
getId());
}
}
}
private static final int
STD = 0;
private static final int
DST = 1;
private static final int
GENERIC = 2;
private static final
Map<
String,
SoftReference<
Map<
Locale,
String[]>>>
cache =
new
ConcurrentHashMap<>();
private
String getDisplayName(
String id, int
type,
Locale locale) {
if (
textStyle ==
TextStyle.
NARROW) {
return null;
}
String[]
names;
SoftReference<
Map<
Locale,
String[]>>
ref =
cache.
get(
id);
Map<
Locale,
String[]>
perLocale = null;
if (
ref == null || (
perLocale =
ref.
get()) == null ||
(
names =
perLocale.
get(
locale)) == null) {
names =
TimeZoneNameUtility.
retrieveDisplayNames(
id,
locale);
if (
names == null) {
return null;
}
names =
Arrays.
copyOfRange(
names, 0, 7);
names[5] =
TimeZoneNameUtility.
retrieveGenericDisplayName(
id,
TimeZone.
LONG,
locale);
if (
names[5] == null) {
names[5] =
names[0]; // use the id
}
names[6] =
TimeZoneNameUtility.
retrieveGenericDisplayName(
id,
TimeZone.
SHORT,
locale);
if (
names[6] == null) {
names[6] =
names[0];
}
if (
perLocale == null) {
perLocale = new
ConcurrentHashMap<>();
}
perLocale.
put(
locale,
names);
cache.
put(
id, new
SoftReference<>(
perLocale));
}
switch (
type) {
case
STD:
return
names[
textStyle.
zoneNameStyleIndex() + 1];
case
DST:
return
names[
textStyle.
zoneNameStyleIndex() + 3];
}
return
names[
textStyle.
zoneNameStyleIndex() + 5];
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
ZoneId zone =
context.
getValue(
TemporalQueries.
zoneId());
if (
zone == null) {
return false;
}
String zname =
zone.
getId();
if (!(
zone instanceof
ZoneOffset)) {
TemporalAccessor dt =
context.
getTemporal();
String name =
getDisplayName(
zname,
dt.
isSupported(
ChronoField.
INSTANT_SECONDS)
? (
zone.
getRules().
isDaylightSavings(
Instant.
from(
dt)) ?
DST :
STD)
:
GENERIC,
context.
getLocale());
if (
name != null) {
zname =
name;
}
}
buf.
append(
zname);
return true;
}
// cache per instance for now
private final
Map<
Locale,
Entry<
Integer,
SoftReference<
PrefixTree>>>
cachedTree = new
HashMap<>();
private final
Map<
Locale,
Entry<
Integer,
SoftReference<
PrefixTree>>>
cachedTreeCI = new
HashMap<>();
@
Override
protected
PrefixTree getTree(
DateTimeParseContext context) {
if (
textStyle ==
TextStyle.
NARROW) {
return super.getTree(
context);
}
Locale locale =
context.
getLocale();
boolean
isCaseSensitive =
context.
isCaseSensitive();
Set<
String>
regionIds =
ZoneRulesProvider.
getAvailableZoneIds();
int
regionIdsSize =
regionIds.
size();
Map<
Locale,
Entry<
Integer,
SoftReference<
PrefixTree>>>
cached =
isCaseSensitive ?
cachedTree :
cachedTreeCI;
Entry<
Integer,
SoftReference<
PrefixTree>>
entry = null;
PrefixTree tree = null;
String[][]
zoneStrings = null;
if ((
entry =
cached.
get(
locale)) == null ||
(
entry.
getKey() !=
regionIdsSize ||
(
tree =
entry.
getValue().
get()) == null)) {
tree =
PrefixTree.
newTree(
context);
zoneStrings =
TimeZoneNameUtility.
getZoneStrings(
locale);
for (
String[]
names :
zoneStrings) {
String zid =
names[0];
if (!
regionIds.
contains(
zid)) {
continue;
}
tree.
add(
zid,
zid); // don't convert zid -> metazone
zid =
ZoneName.
toZid(
zid,
locale);
int
i =
textStyle ==
TextStyle.
FULL ? 1 : 2;
for (;
i <
names.length;
i += 2) {
tree.
add(
names[
i],
zid);
}
}
// if we have a set of preferred zones, need a copy and
// add the preferred zones again to overwrite
if (
preferredZones != null) {
for (
String[]
names :
zoneStrings) {
String zid =
names[0];
if (!
preferredZones.
contains(
zid) || !
regionIds.
contains(
zid)) {
continue;
}
int
i =
textStyle ==
TextStyle.
FULL ? 1 : 2;
for (;
i <
names.length;
i += 2) {
tree.
add(
names[
i],
zid);
}
}
}
cached.
put(
locale, new
SimpleImmutableEntry<>(
regionIdsSize, new
SoftReference<>(
tree)));
}
return
tree;
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a zone ID.
*/
static class
ZoneIdPrinterParser implements
DateTimePrinterParser {
private final
TemporalQuery<
ZoneId>
query;
private final
String description;
ZoneIdPrinterParser(
TemporalQuery<
ZoneId>
query,
String description) {
this.
query =
query;
this.
description =
description;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
ZoneId zone =
context.
getValue(
query);
if (
zone == null) {
return false;
}
buf.
append(
zone.
getId());
return true;
}
/**
* The cached tree to speed up parsing.
*/
private static volatile
Entry<
Integer,
PrefixTree>
cachedPrefixTree;
private static volatile
Entry<
Integer,
PrefixTree>
cachedPrefixTreeCI;
protected
PrefixTree getTree(
DateTimeParseContext context) {
// prepare parse tree
Set<
String>
regionIds =
ZoneRulesProvider.
getAvailableZoneIds();
final int
regionIdsSize =
regionIds.
size();
Entry<
Integer,
PrefixTree>
cached =
context.
isCaseSensitive()
?
cachedPrefixTree :
cachedPrefixTreeCI;
if (
cached == null ||
cached.
getKey() !=
regionIdsSize) {
synchronized (this) {
cached =
context.
isCaseSensitive() ?
cachedPrefixTree :
cachedPrefixTreeCI;
if (
cached == null ||
cached.
getKey() !=
regionIdsSize) {
cached = new
SimpleImmutableEntry<>(
regionIdsSize,
PrefixTree.
newTree(
regionIds,
context));
if (
context.
isCaseSensitive()) {
cachedPrefixTree =
cached;
} else {
cachedPrefixTreeCI =
cached;
}
}
}
}
return
cached.
getValue();
}
/**
* This implementation looks for the longest matching string.
* For example, parsing Etc/GMT-2 will return Etc/GMC-2 rather than just
* Etc/GMC although both are valid.
*/
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
int
length =
text.
length();
if (
position >
length) {
throw new
IndexOutOfBoundsException();
}
if (
position ==
length) {
return ~
position;
}
// handle fixed time-zone IDs
char
nextChar =
text.
charAt(
position);
if (
nextChar == '+' ||
nextChar == '-') {
return
parseOffsetBased(
context,
text,
position,
position,
OffsetIdPrinterParser.
INSTANCE_ID_Z);
} else if (
length >=
position + 2) {
char
nextNextChar =
text.
charAt(
position + 1);
if (
context.
charEquals(
nextChar, 'U') &&
context.
charEquals(
nextNextChar, 'T')) {
if (
length >=
position + 3 &&
context.
charEquals(
text.
charAt(
position + 2), 'C')) {
return
parseOffsetBased(
context,
text,
position,
position + 3,
OffsetIdPrinterParser.
INSTANCE_ID_ZERO);
}
return
parseOffsetBased(
context,
text,
position,
position + 2,
OffsetIdPrinterParser.
INSTANCE_ID_ZERO);
} else if (
context.
charEquals(
nextChar, 'G') &&
length >=
position + 3 &&
context.
charEquals(
nextNextChar, 'M') &&
context.
charEquals(
text.
charAt(
position + 2), 'T')) {
return
parseOffsetBased(
context,
text,
position,
position + 3,
OffsetIdPrinterParser.
INSTANCE_ID_ZERO);
}
}
// parse
PrefixTree tree =
getTree(
context);
ParsePosition ppos = new
ParsePosition(
position);
String parsedZoneId =
tree.
match(
text,
ppos);
if (
parsedZoneId == null) {
if (
context.
charEquals(
nextChar, 'Z')) {
context.
setParsed(
ZoneOffset.
UTC);
return
position + 1;
}
return ~
position;
}
context.
setParsed(
ZoneId.
of(
parsedZoneId));
return
ppos.
getIndex();
}
/**
* Parse an offset following a prefix and set the ZoneId if it is valid.
* To matching the parsing of ZoneId.of the values are not normalized
* to ZoneOffsets.
*
* @param context the parse context
* @param text the input text
* @param prefixPos start of the prefix
* @param position start of text after the prefix
* @param parser parser for the value after the prefix
* @return the position after the parse
*/
private int
parseOffsetBased(
DateTimeParseContext context,
CharSequence text, int
prefixPos, int
position,
OffsetIdPrinterParser parser) {
String prefix =
text.
toString().
substring(
prefixPos,
position).
toUpperCase();
if (
position >=
text.
length()) {
context.
setParsed(
ZoneId.
of(
prefix));
return
position;
}
// '0' or 'Z' after prefix is not part of a valid ZoneId; use bare prefix
if (
text.
charAt(
position) == '0' ||
context.
charEquals(
text.
charAt(
position), 'Z')) {
context.
setParsed(
ZoneId.
of(
prefix));
return
position;
}
DateTimeParseContext newContext =
context.
copy();
int
endPos =
parser.
parse(
newContext,
text,
position);
try {
if (
endPos < 0) {
if (
parser ==
OffsetIdPrinterParser.
INSTANCE_ID_Z) {
return ~
prefixPos;
}
context.
setParsed(
ZoneId.
of(
prefix));
return
position;
}
int
offset = (int)
newContext.
getParsed(
OFFSET_SECONDS).
longValue();
ZoneOffset zoneOffset =
ZoneOffset.
ofTotalSeconds(
offset);
context.
setParsed(
ZoneId.
ofOffset(
prefix,
zoneOffset));
return
endPos;
} catch (
DateTimeException dte) {
return ~
prefixPos;
}
}
@
Override
public
String toString() {
return
description;
}
}
//-----------------------------------------------------------------------
/**
* A String based prefix tree for parsing time-zone names.
*/
static class
PrefixTree {
protected
String key;
protected
String value;
protected char
c0; // performance optimization to avoid the
// boundary check cost of key.charat(0)
protected
PrefixTree child;
protected
PrefixTree sibling;
private
PrefixTree(
String k,
String v,
PrefixTree child) {
this.
key =
k;
this.
value =
v;
this.
child =
child;
if (
k.
length() == 0){
c0 = 0xffff;
} else {
c0 =
key.
charAt(0);
}
}
/**
* Creates a new prefix parsing tree based on parse context.
*
* @param context the parse context
* @return the tree, not null
*/
public static
PrefixTree newTree(
DateTimeParseContext context) {
//if (!context.isStrict()) {
// return new LENIENT("", null, null);
//}
if (
context.
isCaseSensitive()) {
return new
PrefixTree("", null, null);
}
return new
CI("", null, null);
}
/**
* Creates a new prefix parsing tree.
*
* @param keys a set of strings to build the prefix parsing tree, not null
* @param context the parse context
* @return the tree, not null
*/
public static
PrefixTree newTree(
Set<
String>
keys,
DateTimeParseContext context) {
PrefixTree tree =
newTree(
context);
for (
String k :
keys) {
tree.
add0(
k,
k);
}
return
tree;
}
/**
* Clone a copy of this tree
*/
public
PrefixTree copyTree() {
PrefixTree copy = new
PrefixTree(
key,
value, null);
if (
child != null) {
copy.
child =
child.
copyTree();
}
if (
sibling != null) {
copy.
sibling =
sibling.
copyTree();
}
return
copy;
}
/**
* Adds a pair of {key, value} into the prefix tree.
*
* @param k the key, not null
* @param v the value, not null
* @return true if the pair is added successfully
*/
public boolean
add(
String k,
String v) {
return
add0(
k,
v);
}
private boolean
add0(
String k,
String v) {
k =
toKey(
k);
int
prefixLen =
prefixLength(
k);
if (
prefixLen ==
key.
length()) {
if (
prefixLen <
k.
length()) { // down the tree
String subKey =
k.
substring(
prefixLen);
PrefixTree c =
child;
while (
c != null) {
if (
isEqual(
c.
c0,
subKey.
charAt(0))) {
return
c.
add0(
subKey,
v);
}
c =
c.
sibling;
}
// add the node as the child of the current node
c =
newNode(
subKey,
v, null);
c.
sibling =
child;
child =
c;
return true;
}
// have an existing <key, value> already, overwrite it
// if (value != null) {
// return false;
//}
value =
v;
return true;
}
// split the existing node
PrefixTree n1 =
newNode(
key.
substring(
prefixLen),
value,
child);
key =
k.
substring(0,
prefixLen);
child =
n1;
if (
prefixLen <
k.
length()) {
PrefixTree n2 =
newNode(
k.
substring(
prefixLen),
v, null);
child.
sibling =
n2;
value = null;
} else {
value =
v;
}
return true;
}
/**
* Match text with the prefix tree.
*
* @param text the input text to parse, not null
* @param off the offset position to start parsing at
* @param end the end position to stop parsing
* @return the resulting string, or null if no match found.
*/
public
String match(
CharSequence text, int
off, int
end) {
if (!
prefixOf(
text,
off,
end)){
return null;
}
if (
child != null && (
off +=
key.
length()) !=
end) {
PrefixTree c =
child;
do {
if (
isEqual(
c.
c0,
text.
charAt(
off))) {
String found =
c.
match(
text,
off,
end);
if (
found != null) {
return
found;
}
return
value;
}
c =
c.
sibling;
} while (
c != null);
}
return
value;
}
/**
* Match text with the prefix tree.
*
* @param text the input text to parse, not null
* @param pos the position to start parsing at, from 0 to the text
* length. Upon return, position will be updated to the new parse
* position, or unchanged, if no match found.
* @return the resulting string, or null if no match found.
*/
public
String match(
CharSequence text,
ParsePosition pos) {
int
off =
pos.
getIndex();
int
end =
text.
length();
if (!
prefixOf(
text,
off,
end)){
return null;
}
off +=
key.
length();
if (
child != null &&
off !=
end) {
PrefixTree c =
child;
do {
if (
isEqual(
c.
c0,
text.
charAt(
off))) {
pos.
setIndex(
off);
String found =
c.
match(
text,
pos);
if (
found != null) {
return
found;
}
break;
}
c =
c.
sibling;
} while (
c != null);
}
pos.
setIndex(
off);
return
value;
}
protected
String toKey(
String k) {
return
k;
}
protected
PrefixTree newNode(
String k,
String v,
PrefixTree child) {
return new
PrefixTree(
k,
v,
child);
}
protected boolean
isEqual(char
c1, char
c2) {
return
c1 ==
c2;
}
protected boolean
prefixOf(
CharSequence text, int
off, int
end) {
if (
text instanceof
String) {
return ((
String)
text).
startsWith(
key,
off);
}
int
len =
key.
length();
if (
len >
end -
off) {
return false;
}
int
off0 = 0;
while (
len-- > 0) {
if (!
isEqual(
key.
charAt(
off0++),
text.
charAt(
off++))) {
return false;
}
}
return true;
}
private int
prefixLength(
String k) {
int
off = 0;
while (
off <
k.
length() &&
off <
key.
length()) {
if (!
isEqual(
k.
charAt(
off),
key.
charAt(
off))) {
return
off;
}
off++;
}
return
off;
}
/**
* Case Insensitive prefix tree.
*/
private static class
CI extends
PrefixTree {
private
CI(
String k,
String v,
PrefixTree child) {
super(
k,
v,
child);
}
@
Override
protected
CI newNode(
String k,
String v,
PrefixTree child) {
return new
CI(
k,
v,
child);
}
@
Override
protected boolean
isEqual(char
c1, char
c2) {
return
DateTimeParseContext.
charEqualsIgnoreCase(
c1,
c2);
}
@
Override
protected boolean
prefixOf(
CharSequence text, int
off, int
end) {
int
len =
key.
length();
if (
len >
end -
off) {
return false;
}
int
off0 = 0;
while (
len-- > 0) {
if (!
isEqual(
key.
charAt(
off0++),
text.
charAt(
off++))) {
return false;
}
}
return true;
}
}
/**
* Lenient prefix tree. Case insensitive and ignores characters
* like space, underscore and slash.
*/
private static class
LENIENT extends
CI {
private
LENIENT(
String k,
String v,
PrefixTree child) {
super(
k,
v,
child);
}
@
Override
protected
CI newNode(
String k,
String v,
PrefixTree child) {
return new
LENIENT(
k,
v,
child);
}
private boolean
isLenientChar(char
c) {
return
c == ' ' ||
c == '_' ||
c == '/';
}
protected
String toKey(
String k) {
for (int
i = 0;
i <
k.
length();
i++) {
if (
isLenientChar(
k.
charAt(
i))) {
StringBuilder sb = new
StringBuilder(
k.
length());
sb.
append(
k, 0,
i);
i++;
while (
i <
k.
length()) {
if (!
isLenientChar(
k.
charAt(
i))) {
sb.
append(
k.
charAt(
i));
}
i++;
}
return
sb.
toString();
}
}
return
k;
}
@
Override
public
String match(
CharSequence text,
ParsePosition pos) {
int
off =
pos.
getIndex();
int
end =
text.
length();
int
len =
key.
length();
int
koff = 0;
while (
koff <
len &&
off <
end) {
if (
isLenientChar(
text.
charAt(
off))) {
off++;
continue;
}
if (!
isEqual(
key.
charAt(
koff++),
text.
charAt(
off++))) {
return null;
}
}
if (
koff !=
len) {
return null;
}
if (
child != null &&
off !=
end) {
int
off0 =
off;
while (
off0 <
end &&
isLenientChar(
text.
charAt(
off0))) {
off0++;
}
if (
off0 <
end) {
PrefixTree c =
child;
do {
if (
isEqual(
c.
c0,
text.
charAt(
off0))) {
pos.
setIndex(
off0);
String found =
c.
match(
text,
pos);
if (
found != null) {
return
found;
}
break;
}
c =
c.
sibling;
} while (
c != null);
}
}
pos.
setIndex(
off);
return
value;
}
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a chronology.
*/
static final class
ChronoPrinterParser implements
DateTimePrinterParser {
/** The text style to output, null means the ID. */
private final
TextStyle textStyle;
ChronoPrinterParser(
TextStyle textStyle) {
// validated by caller
this.
textStyle =
textStyle;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Chronology chrono =
context.
getValue(
TemporalQueries.
chronology());
if (
chrono == null) {
return false;
}
if (
textStyle == null) {
buf.
append(
chrono.
getId());
} else {
buf.
append(
getChronologyName(
chrono,
context.
getLocale()));
}
return true;
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
// simple looping parser to find the chronology
if (
position < 0 ||
position >
text.
length()) {
throw new
IndexOutOfBoundsException();
}
Set<
Chronology>
chronos =
Chronology.
getAvailableChronologies();
Chronology bestMatch = null;
int
matchLen = -1;
for (
Chronology chrono :
chronos) {
String name;
if (
textStyle == null) {
name =
chrono.
getId();
} else {
name =
getChronologyName(
chrono,
context.
getLocale());
}
int
nameLen =
name.
length();
if (
nameLen >
matchLen &&
context.
subSequenceEquals(
text,
position,
name, 0,
nameLen)) {
bestMatch =
chrono;
matchLen =
nameLen;
}
}
if (
bestMatch == null) {
return ~
position;
}
context.
setParsed(
bestMatch);
return
position +
matchLen;
}
/**
* Returns the chronology name of the given chrono in the given locale
* if available, or the chronology Id otherwise. The regular ResourceBundle
* search path is used for looking up the chronology name.
*
* @param chrono the chronology, not null
* @param locale the locale, not null
* @return the chronology name of chrono in locale, or the id if no name is available
* @throws NullPointerException if chrono or locale is null
*/
private
String getChronologyName(
Chronology chrono,
Locale locale) {
String key = "calendarname." +
chrono.
getCalendarType();
String name =
DateTimeTextProvider.
getLocalizedResource(
key,
locale);
return
name != null ?
name :
chrono.
getId();
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a localized pattern.
*/
static final class
LocalizedPrinterParser implements
DateTimePrinterParser {
/** Cache of formatters. */
private static final
ConcurrentMap<
String,
DateTimeFormatter>
FORMATTER_CACHE = new
ConcurrentHashMap<>(16, 0.75f, 2);
private final
FormatStyle dateStyle;
private final
FormatStyle timeStyle;
/**
* Constructor.
*
* @param dateStyle the date style to use, may be null
* @param timeStyle the time style to use, may be null
*/
LocalizedPrinterParser(
FormatStyle dateStyle,
FormatStyle timeStyle) {
// validated by caller
this.
dateStyle =
dateStyle;
this.
timeStyle =
timeStyle;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
Chronology chrono =
Chronology.
from(
context.
getTemporal());
return
formatter(
context.
getLocale(),
chrono).
toPrinterParser(false).
format(
context,
buf);
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
Chronology chrono =
context.
getEffectiveChronology();
return
formatter(
context.
getLocale(),
chrono).
toPrinterParser(false).
parse(
context,
text,
position);
}
/**
* Gets the formatter to use.
* <p>
* The formatter will be the most appropriate to use for the date and time style in the locale.
* For example, some locales will use the month name while others will use the number.
*
* @param locale the locale to use, not null
* @param chrono the chronology to use, not null
* @return the formatter, not null
* @throws IllegalArgumentException if the formatter cannot be found
*/
private
DateTimeFormatter formatter(
Locale locale,
Chronology chrono) {
String key =
chrono.
getId() + '|' +
locale.
toString() + '|' +
dateStyle +
timeStyle;
DateTimeFormatter formatter =
FORMATTER_CACHE.
get(
key);
if (
formatter == null) {
String pattern =
getLocalizedDateTimePattern(
dateStyle,
timeStyle,
chrono,
locale);
formatter = new
DateTimeFormatterBuilder().
appendPattern(
pattern).
toFormatter(
locale);
DateTimeFormatter old =
FORMATTER_CACHE.
putIfAbsent(
key,
formatter);
if (
old != null) {
formatter =
old;
}
}
return
formatter;
}
@
Override
public
String toString() {
return "Localized(" + (
dateStyle != null ?
dateStyle : "") + "," +
(
timeStyle != null ?
timeStyle : "") + ")";
}
}
//-----------------------------------------------------------------------
/**
* Prints or parses a localized pattern from a localized field.
* The specific formatter and parameters is not selected until the
* the field is to be printed or parsed.
* The locale is needed to select the proper WeekFields from which
* the field for day-of-week, week-of-month, or week-of-year is selected.
*/
static final class
WeekBasedFieldPrinterParser implements
DateTimePrinterParser {
private char
chr;
private int
count;
/**
* Constructor.
*
* @param chr the pattern format letter that added this PrinterParser.
* @param count the repeat count of the format letter
*/
WeekBasedFieldPrinterParser(char
chr, int
count) {
this.
chr =
chr;
this.
count =
count;
}
@
Override
public boolean
format(
DateTimePrintContext context,
StringBuilder buf) {
return
printerParser(
context.
getLocale()).
format(
context,
buf);
}
@
Override
public int
parse(
DateTimeParseContext context,
CharSequence text, int
position) {
return
printerParser(
context.
getLocale()).
parse(
context,
text,
position);
}
/**
* Gets the printerParser to use based on the field and the locale.
*
* @param locale the locale to use, not null
* @return the formatter, not null
* @throws IllegalArgumentException if the formatter cannot be found
*/
private
DateTimePrinterParser printerParser(
Locale locale) {
WeekFields weekDef =
WeekFields.
of(
locale);
TemporalField field = null;
switch (
chr) {
case 'Y':
field =
weekDef.
weekBasedYear();
if (
count == 2) {
return new
ReducedPrinterParser(
field, 2, 2, 0,
ReducedPrinterParser.
BASE_DATE, 0);
} else {
return new
NumberPrinterParser(
field,
count, 19,
(
count < 4) ?
SignStyle.
NORMAL :
SignStyle.
EXCEEDS_PAD, -1);
}
case 'e':
case 'c':
field =
weekDef.
dayOfWeek();
break;
case 'w':
field =
weekDef.
weekOfWeekBasedYear();
break;
case 'W':
field =
weekDef.
weekOfMonth();
break;
default:
throw new
IllegalStateException("unreachable");
}
return new
NumberPrinterParser(
field, (
count == 2 ? 2 : 1), 2,
SignStyle.
NOT_NEGATIVE);
}
@
Override
public
String toString() {
StringBuilder sb = new
StringBuilder(30);
sb.
append("Localized(");
if (
chr == 'Y') {
if (
count == 1) {
sb.
append("WeekBasedYear");
} else if (
count == 2) {
sb.
append("ReducedValue(WeekBasedYear,2,2,2000-01-01)");
} else {
sb.
append("WeekBasedYear,").
append(
count).
append(",")
.
append(19).
append(",")
.
append((
count < 4) ?
SignStyle.
NORMAL :
SignStyle.
EXCEEDS_PAD);
}
} else {
switch (
chr) {
case 'c':
case 'e':
sb.
append("DayOfWeek");
break;
case 'w':
sb.
append("WeekOfWeekBasedYear");
break;
case 'W':
sb.
append("WeekOfMonth");
break;
default:
break;
}
sb.
append(",");
sb.
append(
count);
}
sb.
append(")");
return
sb.
toString();
}
}
//-------------------------------------------------------------------------
/**
* Length comparator.
*/
static final
Comparator<
String>
LENGTH_SORT = new
Comparator<
String>() {
@
Override
public int
compare(
String str1,
String str2) {
return
str1.
length() ==
str2.
length() ?
str1.
compareTo(
str2) :
str1.
length() -
str2.
length();
}
};
}