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/*
* Copyright (C) 2013 The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cyanogenmod.filemanager.ash;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A helper class for deal with patters
*/
public final class RegExpUtil {
/**
* A constant that is returned when the no expression matches.
*/
public static final int NO_MATCH = -1;
/**
* New line pattern
*/
public static final Pattern NEWLINE_PATTERN = Pattern.compile("(\r\n|\n|\r)"); //$NON-NLS-1$
/**
* Method that returns the last match position of a regexp,
*
* @param pattern The patter
* @param input The input
* @param withPattern Whether the return position should contains the pattern or not.
* @return int The matched position or -1
*/
public static int getLastMatch(Pattern pattern, CharSequence input, boolean withPattern) {
Matcher m = pattern.matcher(input);
int p = NO_MATCH;
while (m.find()) {
p = withPattern ? m.start() : m.end();
}
return p;
}
/**
* Method that returns the next match position of a regexp,
*
* @param pattern The patter
* @param input The input
* @param withPattern Whether the return position should contains the pattern or not.
* @return int The matched position or -1
*/
public static int getNextMatch(Pattern pattern, CharSequence input, boolean withPattern) {
Matcher m = pattern.matcher(input);
int p = NO_MATCH;
if (m.find()) {
return withPattern ? m.end() : m.start();
}
return p;
}
}
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