/* Copyright (c) 2001-2014, The HSQL Development Group
* 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 the HSQL Development Group 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 HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* 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;
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* 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 org.hsqldb.lib;
import java.io.
IOException;
import java.io.
LineNumberReader;
import org.hsqldb.map.
ValuePool;
/**
* Uses a LineNumberReader and returns multiple consecutive lines which conform
* to the specified group demarcation characteristics. Any {@link IOException}
* thrown while reading from the reader is handled internally.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class
LineGroupReader {
private static final
String[]
defaultContinuations = new
String[] {
" ", "*"
};
private static final
String[]
defaultIgnoredStarts = new
String[]{ "--" };
static final
String LS =
System.
getProperty("line.separator", "\n");
//
LineNumberReader reader;
String nextStartLine = null;
int
startLineNumber = 0;
int
nextStartLineNumber = 0;
//
final
String[]
sectionContinuations;
final
String[]
sectionStarts;
final
String[]
ignoredStarts;
/**
* Default constructor for TestUtil usage.
* Sections start at lines beginning with any non-space character.
* SQL comment lines are ignored.
*/
public
LineGroupReader(
LineNumberReader reader) {
this.
sectionContinuations =
defaultContinuations;
this.
sectionStarts =
ValuePool.
emptyStringArray;
this.
ignoredStarts =
defaultIgnoredStarts;
this.
reader =
reader;
try {
getSection();
} catch (
Exception e) {}
}
/**
* Constructor for sections starting with specified strings.
*/
public
LineGroupReader(
LineNumberReader reader,
String[]
sectionStarts) {
this.
sectionStarts =
sectionStarts;
this.
sectionContinuations =
ValuePool.
emptyStringArray;
this.
ignoredStarts =
ValuePool.
emptyStringArray;
this.
reader =
reader;
try {
getSection();
} catch (
Exception e) {}
}
public
HsqlArrayList getSection() {
String line;
HsqlArrayList list = new
HsqlArrayList(new
String[8], 0);
if (
nextStartLine != null) {
list.
add(
nextStartLine);
startLineNumber =
nextStartLineNumber;
}
while (true) {
boolean
newSection = false;
line = null;
try {
line =
reader.
readLine();
} catch (
Exception e) {}
if (
line == null) {
nextStartLine = null;
return
list;
}
line =
line.
substring(0,
StringUtil.
rightTrimSize(
line));
//if the line is blank or a comment, then ignore it
if (
line.
length() == 0 ||
isIgnoredLine(
line)) {
continue;
}
if (
isNewSectionLine(
line)) {
newSection = true;
}
if (
newSection) {
nextStartLine =
line;
nextStartLineNumber =
reader.
getLineNumber();
return
list;
}
list.
add(
line);
}
}
/**
* Returns a map/list which contains the first line of each line group
* as key and the rest of the lines as a String value.
*/
public
HashMappedList getAsMap() {
HashMappedList map = new
HashMappedList();
while (true) {
HsqlArrayList list =
getSection();
if (
list.
size() < 1) {
break;
}
String key = (
String)
list.
get(0);
String value =
LineGroupReader.
convertToString(
list, 1);
map.
put(
key,
value);
}
return
map;
}
private boolean
isNewSectionLine(
String line) {
if (
sectionStarts.length == 0) {
for (int
i = 0;
i <
sectionContinuations.length;
i++) {
if (
line.
startsWith(
sectionContinuations[
i])) {
return false;
}
}
return true;
} else {
for (int
i = 0;
i <
sectionStarts.length;
i++) {
if (
line.
startsWith(
sectionStarts[
i])) {
return true;
}
}
return false;
}
}
private boolean
isIgnoredLine(
String line) {
for (int
i = 0;
i <
ignoredStarts.length;
i++) {
if (
line.
startsWith(
ignoredStarts[
i])) {
return true;
}
}
return false;
}
public int
getStartLineNumber() {
return
startLineNumber;
}
public void
close() {
try {
reader.
close();
} catch (
Exception e) {}
}
public static
String convertToString(
HsqlArrayList list, int
offset) {
StringBuffer sb = new
StringBuffer();
for (int
i =
offset;
i <
list.
size();
i++) {
sb.
append(
list.
get(
i)).
append(
LS);
}
return
sb.
toString();
}
}