com.tek271.reverseProxy.utils.RegexTools.java Source code

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Here is the source code for com.tek271.reverseProxy.utils.RegexTools.java

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/*
This file is part of Tek271 Reverse Proxy Server.
    
Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
Tek271 Reverse Proxy Server is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.
    
You should have received a copy of the GNU Lesser General Public License
along with Tek271 Reverse Proxy Server.  If not, see http://www.gnu.org/licenses/
 */
package com.tek271.reverseProxy.utils;

import java.util.Collections;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

import com.google.common.collect.Lists;

public class RegexTools {

    /** Find all matches in a string */
    public static List<Tuple3<Integer, Integer, String>> findAll(Pattern pattern, String text,
            boolean matchGroups) {
        if (StringUtils.isEmpty(text))
            return Collections.emptyList();

        Matcher matcher = pattern.matcher(text);
        List<Tuple3<Integer, Integer, String>> r = Lists.newArrayList();
        while (matcher.find()) {
            int groupCount = matcher.groupCount();
            if (groupCount == 0 || !matchGroups) {
                r.add(getMatch(matcher, 0));
            } else {
                for (int i = 1; i <= groupCount; i++) {
                    r.add(getMatch(matcher, i));
                }
            }
        }
        return r;
    }

    private static Tuple3<Integer, Integer, String> getMatch(Matcher matcher, int groupIndex) {
        return Tuple3.tuple3(matcher.start(groupIndex), matcher.end(groupIndex), matcher.group(groupIndex));
    }

    public static List<Tuple3<Integer, Integer, String>> findAll(String pattern, String text, boolean matchGroups,
            RegexFlagsEnum... flags) {
        int codes = RegexFlagsEnum.addCodes(flags);
        Pattern pat = Pattern.compile(pattern, codes);
        return findAll(pat, text, matchGroups);
    }

}