001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 **/
018
019 package org.activemq.filter;
020
021 import org.activemq.message.ActiveMQDestination;
022
023 import javax.jms.Destination;
024 import javax.jms.JMSException;
025 import javax.jms.Message;
026
027
028 /**
029 * Represents a filter which only operates on Destinations
030 *
031 * @version $Revision: 1.1.1.1 $
032 */
033 public abstract class DestinationFilter implements Filter {
034 public static final String ANY_DESCENDENT = ">";
035 public static final String ANY_CHILD = "*";
036
037 public boolean matches(Message message) throws JMSException {
038 return matches(message.getJMSDestination());
039 }
040
041 public abstract boolean matches(Destination destination);
042
043 public static DestinationFilter parseFilter(Destination destination) {
044 if (destination instanceof ActiveMQDestination) {
045 ActiveMQDestination activeDestination = (ActiveMQDestination) destination;
046 if (activeDestination.isComposite()) {
047 return new CompositeDestinationFilter(activeDestination);
048 }
049 }
050 String[] paths = DestinationPath.getDestinationPaths(destination);
051 int idx = paths.length - 1;
052 if (idx >= 0) {
053 String lastPath = paths[idx];
054 if (lastPath.equals(ANY_DESCENDENT)) {
055 return new PrefixDestinationFilter(paths);
056 }
057 else {
058 while (idx >= 0) {
059 lastPath = paths[idx--];
060 if (lastPath.equals(ANY_CHILD)) {
061 return new WildcardDestinationFilter(paths);
062 }
063 }
064 }
065 }
066
067 // if none of the paths contain a wildcard then use equality
068 return new SimpleDestinationFilter(destination);
069 }
070 }