/* Licensed to the Apache Software Foundation (ASF) under one
* 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.
*/
package org.apache.qpid.client.filter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.qpid.AMQInternalException;
import org.apache.qpid.client.message.AbstractJMSMessage;
import org.apache.qpid.filter.FilterableMessage;
import org.apache.qpid.filter.SelectorParsingException;
import org.apache.qpid.filter.selector.ParseException;
import org.apache.qpid.filter.selector.SelectorParser;
import org.apache.qpid.filter.BooleanExpression;
import org.apache.qpid.filter.selector.TokenMgrError;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
public class JMSSelectorFilter implements MessageFilter
{
private static final Logger _logger = LoggerFactory.getLogger(JMSSelectorFilter.class);
private final String _selector;
private final BooleanExpression _matcher;
public JMSSelectorFilter(String selector) throws AMQInternalException
{
if (selector == null || "".equals(selector))
{
throw new IllegalArgumentException("Cannot create a JMSSelectorFilter with a null or empty selector string");
}
_selector = selector;
if (_logger.isDebugEnabled())
{
_logger.debug("Created JMSSelectorFilter with selector:" + _selector);
}
try
{
_matcher = new SelectorParser().parse(selector);
}
catch (ParseException e)
{
throw new AMQInternalException("Unable to parse selector \""+selector+"\"", e);
}
catch (SelectorParsingException e)
{
throw new AMQInternalException("Unable to parse selector \""+selector+"\"", e);
}
catch (TokenMgrError e)
{
throw new AMQInternalException("Unable to parse selector \""+selector+"\"", e);
}
}
public boolean matches(AbstractJMSMessage message)
{
try
{
boolean match = _matcher.matches(wrap(message));
if (_logger.isDebugEnabled())
{
_logger.debug(message + " match(" + match + ") selector(" + _selector + "): " + _selector);
}
return match;
}
catch (SelectorParsingException e)
{
_logger.warn("Caught exception when evaluating message selector for message " + message, e);
}
return false;
}
private FilterableMessage wrap(final AbstractJMSMessage message)
{
return new FilterableMessage()
{
public boolean isPersistent()
{
try
{
return message.getJMSDeliveryMode() == DeliveryMode.PERSISTENT;
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public boolean isRedelivered()
{
try
{
return message.getJMSRedelivered();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public Object getHeader(String name)
{
try
{
return message.getObjectProperty(name);
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public String getReplyTo()
{
return message.getReplyToString();
}
public String getType()
{
try
{
return message.getJMSType();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public byte getPriority()
{
try
{
return (byte) message.getJMSPriority();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public String getMessageId()
{
try
{
return message.getJMSMessageID();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public long getTimestamp()
{
try
{
return message.getJMSTimestamp();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public String getCorrelationId()
{
try
{
return message.getJMSCorrelationID();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
public long getExpiration()
{
try
{
return message.getJMSExpiration();
}
catch (JMSException e)
{
throw new SelectorParsingException(e);
}
}
};
}
public String getSelector()
{
return _selector;
}
}