TopicMatcher.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services 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 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services 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 this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */
package org.granite.gravity.selector;

public class TopicMatcher {
    
    public static boolean matchesTopic(String destinationTopic, String messageTopic) {
    	String[] destSegments = destinationTopic.split("/");
    	String[] msgSegments = messageTopic.split("/");
    	
    	int msgSegmentIndex = 0;
    	for (String segment : destSegments) {
    		if (segment.equals("**"))
    			return true;
    		else if (segment.equals("*"))
    			msgSegmentIndex++;
    		else {
    			if (msgSegmentIndex < msgSegments.length && segment.equals(msgSegments[msgSegmentIndex]))
    				msgSegmentIndex++;
    			else
    				return false;
    		}
    	}
    	return msgSegmentIndex >= msgSegments.length;
    }

}