/*
* This file is part of FFMQ.
*
* FFMQ is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFMQ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFMQ; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.timewalker.ffmq3.common.message;
import javax.jms.JMSException;
import javax.jms.Message;
import net.timewalker.ffmq3.common.message.selector.MessageSelectorParser;
import net.timewalker.ffmq3.common.message.selector.expression.SelectorNode;
/**
* <p>Object implementation of a JMS message selector</p>
*/
public final class MessageSelector
{
// Parsed selector node tree
private SelectorNode selectorTree;
/**
* Constructor
*/
public MessageSelector( String selectorString ) throws JMSException
{
this.selectorTree = new MessageSelectorParser(selectorString).parse();
}
/**
* Test the selector against a given message
*/
public boolean matches( Message message ) throws JMSException
{
Boolean result = selectorTree != null ? selectorTree.evaluateBoolean(message) : null;
return result != null && result.booleanValue();
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
public String toString()
{
return selectorTree != null ? selectorTree.toString() : "";
}
}