/*
* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*/
/*
*
*
*
*
*
* Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos
*
* All rights reserved.
*
* 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.
*
* * 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.
*
* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package java.time.format;
import java.text.
DecimalFormatSymbols;
import java.util.
Collections;
import java.util.
HashSet;
import java.util.
Locale;
import java.util.
Objects;
import java.util.
Set;
import java.util.concurrent.
ConcurrentHashMap;
import java.util.concurrent.
ConcurrentMap;
/**
* Localized decimal style used in date and time formatting.
* <p>
* A significant part of dealing with dates and times is the localization.
* This class acts as a central point for accessing the information.
*
* @implSpec
* This class is immutable and thread-safe.
*
* @since 1.8
*/
public final class
DecimalStyle {
/**
* The standard set of non-localized decimal style symbols.
* <p>
* This uses standard ASCII characters for zero, positive, negative and a dot for the decimal point.
*/
public static final
DecimalStyle STANDARD = new
DecimalStyle('0', '+', '-', '.');
/**
* The cache of DecimalStyle instances.
*/
private static final
ConcurrentMap<
Locale,
DecimalStyle>
CACHE = new
ConcurrentHashMap<>(16, 0.75f, 2);
/**
* The zero digit.
*/
private final char
zeroDigit;
/**
* The positive sign.
*/
private final char
positiveSign;
/**
* The negative sign.
*/
private final char
negativeSign;
/**
* The decimal separator.
*/
private final char
decimalSeparator;
//-----------------------------------------------------------------------
/**
* Lists all the locales that are supported.
* <p>
* The locale 'en_US' will always be present.
*
* @return a Set of Locales for which localization is supported
*/
public static
Set<
Locale>
getAvailableLocales() {
Locale[]
l =
DecimalFormatSymbols.
getAvailableLocales();
Set<
Locale>
locales = new
HashSet<>(
l.length);
Collections.
addAll(
locales,
l);
return
locales;
}
/**
* Obtains the DecimalStyle for the default
* {@link java.util.Locale.Category#FORMAT FORMAT} locale.
* <p>
* This method provides access to locale sensitive decimal style symbols.
* <p>
* This is equivalent to calling
* {@link #of(Locale)
* of(Locale.getDefault(Locale.Category.FORMAT))}.
*
* @see java.util.Locale.Category#FORMAT
* @return the decimal style, not null
*/
public static
DecimalStyle ofDefaultLocale() {
return
of(
Locale.
getDefault(
Locale.
Category.
FORMAT));
}
/**
* Obtains the DecimalStyle for the specified locale.
* <p>
* This method provides access to locale sensitive decimal style symbols.
*
* @param locale the locale, not null
* @return the decimal style, not null
*/
public static
DecimalStyle of(
Locale locale) {
Objects.
requireNonNull(
locale, "locale");
DecimalStyle info =
CACHE.
get(
locale);
if (
info == null) {
info =
create(
locale);
CACHE.
putIfAbsent(
locale,
info);
info =
CACHE.
get(
locale);
}
return
info;
}
private static
DecimalStyle create(
Locale locale) {
DecimalFormatSymbols oldSymbols =
DecimalFormatSymbols.
getInstance(
locale);
char
zeroDigit =
oldSymbols.
getZeroDigit();
char
positiveSign = '+';
char
negativeSign =
oldSymbols.
getMinusSign();
char
decimalSeparator =
oldSymbols.
getDecimalSeparator();
if (
zeroDigit == '0' &&
negativeSign == '-' &&
decimalSeparator == '.') {
return
STANDARD;
}
return new
DecimalStyle(
zeroDigit,
positiveSign,
negativeSign,
decimalSeparator);
}
//-----------------------------------------------------------------------
/**
* Restricted constructor.
*
* @param zeroChar the character to use for the digit of zero
* @param positiveSignChar the character to use for the positive sign
* @param negativeSignChar the character to use for the negative sign
* @param decimalPointChar the character to use for the decimal point
*/
private
DecimalStyle(char
zeroChar, char
positiveSignChar, char
negativeSignChar, char
decimalPointChar) {
this.
zeroDigit =
zeroChar;
this.
positiveSign =
positiveSignChar;
this.
negativeSign =
negativeSignChar;
this.
decimalSeparator =
decimalPointChar;
}
//-----------------------------------------------------------------------
/**
* Gets the character that represents zero.
* <p>
* The character used to represent digits may vary by culture.
* This method specifies the zero character to use, which implies the characters for one to nine.
*
* @return the character for zero
*/
public char
getZeroDigit() {
return
zeroDigit;
}
/**
* Returns a copy of the info with a new character that represents zero.
* <p>
* The character used to represent digits may vary by culture.
* This method specifies the zero character to use, which implies the characters for one to nine.
*
* @param zeroDigit the character for zero
* @return a copy with a new character that represents zero, not null
*/
public
DecimalStyle withZeroDigit(char
zeroDigit) {
if (
zeroDigit == this.
zeroDigit) {
return this;
}
return new
DecimalStyle(
zeroDigit,
positiveSign,
negativeSign,
decimalSeparator);
}
//-----------------------------------------------------------------------
/**
* Gets the character that represents the positive sign.
* <p>
* The character used to represent a positive number may vary by culture.
* This method specifies the character to use.
*
* @return the character for the positive sign
*/
public char
getPositiveSign() {
return
positiveSign;
}
/**
* Returns a copy of the info with a new character that represents the positive sign.
* <p>
* The character used to represent a positive number may vary by culture.
* This method specifies the character to use.
*
* @param positiveSign the character for the positive sign
* @return a copy with a new character that represents the positive sign, not null
*/
public
DecimalStyle withPositiveSign(char
positiveSign) {
if (
positiveSign == this.
positiveSign) {
return this;
}
return new
DecimalStyle(
zeroDigit,
positiveSign,
negativeSign,
decimalSeparator);
}
//-----------------------------------------------------------------------
/**
* Gets the character that represents the negative sign.
* <p>
* The character used to represent a negative number may vary by culture.
* This method specifies the character to use.
*
* @return the character for the negative sign
*/
public char
getNegativeSign() {
return
negativeSign;
}
/**
* Returns a copy of the info with a new character that represents the negative sign.
* <p>
* The character used to represent a negative number may vary by culture.
* This method specifies the character to use.
*
* @param negativeSign the character for the negative sign
* @return a copy with a new character that represents the negative sign, not null
*/
public
DecimalStyle withNegativeSign(char
negativeSign) {
if (
negativeSign == this.
negativeSign) {
return this;
}
return new
DecimalStyle(
zeroDigit,
positiveSign,
negativeSign,
decimalSeparator);
}
//-----------------------------------------------------------------------
/**
* Gets the character that represents the decimal point.
* <p>
* The character used to represent a decimal point may vary by culture.
* This method specifies the character to use.
*
* @return the character for the decimal point
*/
public char
getDecimalSeparator() {
return
decimalSeparator;
}
/**
* Returns a copy of the info with a new character that represents the decimal point.
* <p>
* The character used to represent a decimal point may vary by culture.
* This method specifies the character to use.
*
* @param decimalSeparator the character for the decimal point
* @return a copy with a new character that represents the decimal point, not null
*/
public
DecimalStyle withDecimalSeparator(char
decimalSeparator) {
if (
decimalSeparator == this.
decimalSeparator) {
return this;
}
return new
DecimalStyle(
zeroDigit,
positiveSign,
negativeSign,
decimalSeparator);
}
//-----------------------------------------------------------------------
/**
* Checks whether the character is a digit, based on the currently set zero character.
*
* @param ch the character to check
* @return the value, 0 to 9, of the character, or -1 if not a digit
*/
int
convertToDigit(char
ch) {
int
val =
ch -
zeroDigit;
return (
val >= 0 &&
val <= 9) ?
val : -1;
}
/**
* Converts the input numeric text to the internationalized form using the zero character.
*
* @param numericText the text, consisting of digits 0 to 9, to convert, not null
* @return the internationalized text, not null
*/
String convertNumberToI18N(
String numericText) {
if (
zeroDigit == '0') {
return
numericText;
}
int
diff =
zeroDigit - '0';
char[]
array =
numericText.
toCharArray();
for (int
i = 0;
i <
array.length;
i++) {
array[
i] = (char) (
array[
i] +
diff);
}
return new
String(
array);
}
//-----------------------------------------------------------------------
/**
* Checks if this DecimalStyle is equal to another DecimalStyle.
*
* @param obj the object to check, null returns false
* @return true if this is equal to the other date
*/
@
Override
public boolean
equals(
Object obj) {
if (this ==
obj) {
return true;
}
if (
obj instanceof
DecimalStyle) {
DecimalStyle other = (
DecimalStyle)
obj;
return (
zeroDigit ==
other.
zeroDigit &&
positiveSign ==
other.
positiveSign &&
negativeSign ==
other.
negativeSign &&
decimalSeparator ==
other.
decimalSeparator);
}
return false;
}
/**
* A hash code for this DecimalStyle.
*
* @return a suitable hash code
*/
@
Override
public int
hashCode() {
return
zeroDigit +
positiveSign +
negativeSign +
decimalSeparator;
}
//-----------------------------------------------------------------------
/**
* Returns a string describing this DecimalStyle.
*
* @return a string description, not null
*/
@
Override
public
String toString() {
return "DecimalStyle[" +
zeroDigit +
positiveSign +
negativeSign +
decimalSeparator + "]";
}
}