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.util.HashMap;
025    
026    import org.jboss.mq.selectors.Identifier;
027    import org.jboss.mq.selectors.Operator;
028    import org.jboss.mq.selectors.SelectorParser;
029    
030    import flex.messaging.messages.Message;
031    
032    /**
033     * @author William DRAI
034     */
035    public class JBossMQMessageSelector implements MessageSelector {
036    
037        private Object selector;
038        private HashMap<String, Identifier> identifierMap = new HashMap<String, Identifier>();
039    
040    
041        public JBossMQMessageSelector(String selector) {
042            try {
043                this.selector = SelectorParser.doParse(selector, identifierMap);
044            }
045            catch (Exception e) {
046                throw new RuntimeException("JBossMQ SelectorParser error " + selector, e);
047            }
048        }
049    
050        public synchronized boolean accept(Message message) {
051            try {
052                for (Identifier identifier : identifierMap.values()) {
053                    Object value = message.getHeader(identifier.getName());
054                    identifier.setValue(value);
055                }
056    
057                Object res = null;
058    
059                if (selector instanceof Identifier)
060                    res = ((Identifier)selector).getValue();
061                else if (selector instanceof Operator)
062                    res = ((Operator)selector).apply();
063                else
064                    res = selector;
065    
066                if (res == null)
067                    return false;
068    
069                if (!(res.getClass().equals(Boolean.class)))
070                   throw new Exception("Bad selector result type: " + res);
071    
072                return ((Boolean)res).booleanValue();
073            }
074            catch (Exception e) {
075                throw new RuntimeException("JBossMQ selector accept error " + message, e);
076            }
077        }
078    
079    }