/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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 java.util.regex;

import com.google.gwt.regexp.shared.RegExp;
import com.google.gwt.regexp.shared.MatchResult;

/** Emulation of the {@link Matcher} class, uses {@link RegExp} as internal implementation.
 * @author hneuer */
public class Matcher {
	private final RegExp regExp;
	private final String input;
	private final MatchResult matchResult;

	Matcher (Pattern pattern, CharSequence input) {
		this.regExp = pattern.regExp;
		this.input = String.valueOf(input);
		matchResult = regExp.exec(this.input);
	}

	public boolean find () {
		return regExp.test(input);
	}

	public boolean matches () {
		return regExp.test(input);
	}

	public String group (int group) {
		return matchResult.getGroup(group);
	}
}

@@ -1513,11 +1513,466 @@
 );%0D%0A%09%7D%0D%0A
+%0D%0A%0D%0A    public static String quoteReplacement(String s) %7B%0D%0A        if ((s.indexOf('%5C%5C') == -1) && (s.indexOf('$') == -1))%0D%0A            return s;%0D%0A        StringBuilder sb = new StringBuilder(s.length());%0D%0A        for (int i = 0; i %3C s.length(); i++) %7B%0D%0A            char c = s.charAt(i);%0D%0A            if (c == '%5C%5C' %7C%7C c == '$') %7B%0D%0A                sb.append('%5C%5C');%0D%0A            %7D%0D%0A            sb.append(c);%0D%0A        %7D%0D%0A        return sb.toString();%0D%0A    %7D%0D%0A
 %7D%0D%0A

Add useful method (#4093)