001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.gravity.selector;
023
024 import java.io.IOException;
025
026 import javax.jms.JMSException;
027
028 import org.apache.activemq.command.Response;
029 import org.apache.activemq.filter.BooleanExpression;
030 import org.apache.activemq.filter.MessageEvaluationContext;
031 import org.apache.activemq.selector.SelectorParser;
032 import org.apache.activemq.state.CommandVisitor;
033
034 import flex.messaging.messages.Message;
035
036 /**
037 * @author William DRAI
038 */
039 public class ActiveMQMessageSelector implements MessageSelector {
040
041 private BooleanExpression expression;
042
043
044 public ActiveMQMessageSelector(String selector) {
045 try {
046 this.expression = SelectorParser.parse(selector);
047 }
048 catch (Exception e) {
049 throw new RuntimeException("ActiveMQ SelectorParser error " + selector, e);
050 }
051 }
052
053 public boolean accept(Message message) {
054 try {
055 MessageEvaluationContext context = new MessageEvaluationContext();
056 MessageAdapter ma = new MessageAdapter(message);
057 context.setMessageReference(ma);
058
059 return expression.matches(context);
060 }
061 catch (Exception e) {
062 throw new RuntimeException("ActiveMQ selector accept error " + message, e);
063 }
064 }
065
066
067 private static class MessageAdapter extends org.apache.activemq.command.Message {
068 private Message message = null;
069
070 public MessageAdapter(Message message) {
071 this.message = message;
072 }
073
074 @Override
075 public Object getProperty(String name) throws IOException {
076 return message.getHeader(name);
077 }
078
079 @Override
080 public org.apache.activemq.command.Message copy() {
081 return null;
082 }
083
084 public Response visit(CommandVisitor visitor) throws Exception {
085 return null;
086 }
087
088 public byte getDataStructureType() {
089 return 0;
090 }
091
092 @Override
093 public void clearBody() throws JMSException {
094 }
095
096 @Override
097 public void storeContent() { // Since ActiveMQ 5.7
098 }
099 }
100 }