/* 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.filter;
import java.util.HashMap;
import javax.jms.JMSException;
import org.apache.qpid.AMQInternalException;
import org.apache.qpid.client.message.AbstractJMSMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Represents a property expression
*/
public class PropertyExpression implements Expression
{
// Constants - defined the same as JMS
private static final int NON_PERSISTENT = 1;
private static final int DEFAULT_PRIORITY = 4;
private static final Logger _logger = LoggerFactory.getLogger(PropertyExpression.class);
private static final HashMap<String, Expression> JMS_PROPERTY_EXPRESSIONS = new HashMap<String, Expression>();
static
{
JMS_PROPERTY_EXPRESSIONS.put("JMSDestination", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
//TODO
return null;
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSReplyTo", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
return message.getReplyToString();
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSType", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSType();
}
catch (JMSException e)
{
_logger.warn("Error evaluating property", e);
return null;
}
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSDeliveryMode", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
int mode = message.getJMSDeliveryMode();
if (_logger.isDebugEnabled())
{
_logger.debug("JMSDeliveryMode is :" + mode);
}
return mode;
}
catch (JMSException e)
{
_logger.warn("Error evaluating property",e);
}
return NON_PERSISTENT;
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSPriority", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSPriority();
}
catch (Exception e)
{
_logger.warn("Error evaluating property",e);
}
return DEFAULT_PRIORITY;
}
});
JMS_PROPERTY_EXPRESSIONS.put("AMQMessageID", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSMessageID();
}
catch (JMSException e)
{
_logger.warn("Error evaluating property",e);
return null;
}
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSTimestamp", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSTimestamp();
}
catch (Exception e)
{
_logger.warn("Error evaluating property",e);
return null;
}
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSCorrelationID", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSCorrelationID();
}
catch (JMSException e)
{
_logger.warn("Error evaluating property",e);
return null;
}
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSExpiration", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSExpiration();
}
catch (JMSException e)
{
_logger.warn("Error evaluating property",e);
return null;
}
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSRedelivered", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSRedelivered();
}
catch (JMSException e)
{
_logger.warn("Error evaluating property",e);
return null;
}
}
});
JMS_PROPERTY_EXPRESSIONS.put("JMSMessageID", new Expression()
{
public Object evaluate(AbstractJMSMessage message)
{
try
{
return message.getJMSMessageID();
}
catch (Exception e)
{
_logger.warn("Error evaluating property",e);
return null;
}
}
});
}
private final String name;
private final Expression jmsPropertyExpression;
public PropertyExpression(String name)
{
this.name = name;
jmsPropertyExpression = JMS_PROPERTY_EXPRESSIONS.get(name);
}
public Object evaluate(AbstractJMSMessage message) throws AMQInternalException
{
if (jmsPropertyExpression != null)
{
return jmsPropertyExpression.evaluate(message);
}
else
{
try
{
if (_logger.isDebugEnabled())
{
_logger.debug("Looking up property:" + name);
_logger.debug("Properties are:" + message.getPropertyNames());
}
return message.getObjectProperty(name);
}
catch(JMSException e)
{
throw new AMQInternalException("Exception evaluating properties for filter", e);
}
}
}
public String getName()
{
return name;
}
/**
* @see java.lang.Object#toString()
*/
public String toString()
{
return name;
}
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode()
{
return name.hashCode();
}
/**
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object o)
{
if ((o == null) || !this.getClass().equals(o.getClass()))
{
return false;
}
return name.equals(((PropertyExpression) o).name);
}
}