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 flex.messaging.messages.Message;
025    
026    /**
027     * @author William DRAI
028     */
029    public class GravityMessageSelector implements MessageSelector {
030    
031        private BooleanExpression expression;
032    
033    
034        public GravityMessageSelector(String selector) {
035            try {
036                this.expression = new SelectorParser().parse(selector);
037            }
038            catch (Exception e) {
039                throw new RuntimeException("Gravity SelectorParser error " + selector, e);
040            }
041        }
042    
043        public boolean accept(Message message) {
044            try {
045                MessageEvaluationContext context = new MessageEvaluationContext(message);
046    
047                return expression.matches(context);
048            }
049            catch (Exception e) {
050                throw new RuntimeException("Gravity selector accept error " + message, e);
051            }
052        }
053    }