001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  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 */
017package org.apache.activemq.broker.region.virtual;
018
019import javax.jms.InvalidSelectorException;
020import javax.jms.JMSException;
021
022import org.apache.activemq.command.ActiveMQDestination;
023import org.apache.activemq.filter.BooleanExpression;
024import org.apache.activemq.filter.MessageEvaluationContext;
025import org.apache.activemq.selector.SelectorParser;
026
027/**
028 * Represents a destination which is filtered using some predicate such as a selector
029 * so that messages are only dispatched to the destination if they match the filter.
030 *
031 * @org.apache.xbean.XBean
032 *
033 * 
034 */
035public class FilteredDestination {
036    
037    private ActiveMQDestination destination;
038    private String selector;
039    private BooleanExpression filter;
040
041    public boolean matches(MessageEvaluationContext context) throws JMSException {
042        BooleanExpression booleanExpression = getFilter();
043        if (booleanExpression == null) {
044            return false;
045        }
046        return booleanExpression.matches(context);
047    }
048
049    public ActiveMQDestination getDestination() {
050        return destination;
051    }
052
053    /**
054     * The destination to send messages to if they match the filter
055     */
056    public void setDestination(ActiveMQDestination destination) {
057        this.destination = destination;
058    }
059
060    public String getSelector() {
061        return selector;
062    }
063
064    /**
065     * Sets the JMS selector used to filter messages before forwarding them to this destination
066     */
067    public void setSelector(String selector) throws InvalidSelectorException {
068        this.selector = selector;
069        setFilter(SelectorParser.parse(selector));
070    }
071
072    public BooleanExpression getFilter() {
073        return filter;
074    }
075
076    public void setFilter(BooleanExpression filter) {
077        this.filter = filter;
078    }
079
080
081    /**
082     * Sets the destination property to the given queue name
083     */
084    public void setQueue(String queue) {
085        setDestination(ActiveMQDestination.createDestination(queue, ActiveMQDestination.QUEUE_TYPE));
086    }
087
088    /**
089     * Sets the destination property to the given topic name
090     */
091    public void setTopic(String topic) {
092        setDestination(ActiveMQDestination.createDestination(topic, ActiveMQDestination.TOPIC_TYPE));
093    }
094}