RC9/qpid/java/broker/src/main/java/org/apache/qpid/server/filter/JMSSelectorFilter.java

/*
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 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.    
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package org.apache.qpid.server.filter;

import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.server.filter.jms.selector.SelectorParser;
import org.apache.qpid.server.queue.Filterable;


public class JMSSelectorFilter<E extends Exception> implements MessageFilter<E>
{
    private final static Logger _logger = org.apache.log4j.Logger.getLogger(JMSSelectorFilter.class);

    private String _selector;
    private BooleanExpression<E> _matcher;

    public JMSSelectorFilter(String selector) throws AMQException
    {
        _selector = selector;
        _matcher = new SelectorParser().parse(selector);
    }

    public boolean matches(Filterable<E> message) throws E
    {
        boolean match = _matcher.matches(message);
        if(_logger.isDebugEnabled())
        {
            _logger.debug(message + " match(" + match + ") selector(" + System.identityHashCode(_selector) + "):" + _selector);
        }
        return match;
    }

    public String getSelector()
    {
        return _selector;
    }
}