001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.gravity.selector;
022    
023    import flex.messaging.messages.Message;
024    
025    /**
026     * @author William DRAI
027     */
028    public class GravityMessageSelector implements MessageSelector {
029    
030        private BooleanExpression expression;
031    
032    
033        public GravityMessageSelector(String selector) {
034            try {
035                this.expression = new SelectorParser().parse(selector);
036            }
037            catch (Exception e) {
038                throw new RuntimeException("Gravity SelectorParser error " + selector, e);
039            }
040        }
041    
042        public boolean accept(Message message) {
043            try {
044                MessageEvaluationContext context = new MessageEvaluationContext(message);
045    
046                return expression.matches(context);
047            }
048            catch (Exception e) {
049                throw new RuntimeException("Gravity selector accept error " + message, e);
050            }
051        }
052    }