/*
* $Id: JMSMessageToObject.java 20321 2010-11-24 15:21:24Z dfeist $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.transport.jms.transformers;
import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.types.DataTypeFactory;
import org.mule.util.ClassUtils;
import javax.jms.BytesMessage;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.ObjectMessage;
import javax.jms.StreamMessage;
import javax.jms.TextMessage;
/**
* <code>JMSMessageToObject</code> Will convert a <code>javax.jms.Message</code>
* or sub-type into an object by extracting the message payload. Users of this
* transformer can set different return types on the transform to control the way it
* behaves.
* <ul>
* <li>javax.jms.TextMessage - java.lang.String</li>
* <li>javax.jms.ObjectMessage - java.lang.Object</li>
* <li>javax.jms.BytesMessage - Byte[]. Note that the transformer will check if the
* payload is compressed and automatically uncompress the message.</li>
* <li>javax.jms.MapMessage - java.util.Map</li>
* <li>javax.jms.StreamMessage - java.util.Vector of objects from the Stream
* Message.</li>
* </ul>
*/
public class JMSMessageToObject extends AbstractJmsTransformer
{
public JMSMessageToObject()
{
super();
}
@Override
protected void declareInputOutputClasses()
{
registerSourceType(DataTypeFactory.create(Message.class));
registerSourceType(DataTypeFactory.create(TextMessage.class));
registerSourceType(DataTypeFactory.create(ObjectMessage.class));
registerSourceType(DataTypeFactory.create(BytesMessage.class));
registerSourceType(DataTypeFactory.create(MapMessage.class));
registerSourceType(DataTypeFactory.create(StreamMessage.class));
}
@Override
public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException
{
try
{
if (logger.isDebugEnabled())
{
logger.debug("Source object is " + ClassUtils.getSimpleName(message.getPayload().getClass()));
}
Object result = transformFromMessage((Message) message.getPayload(), outputEncoding);
// We need to handle String / byte[] explicitly since this transformer does not define
// a single return type
if (returnType.getType().equals(byte[].class) && result instanceof String)
{
result = result.toString().getBytes(outputEncoding);
}
else if (returnType.getType().equals(String.class) && result instanceof byte[])
{
result = new String((byte[]) result, outputEncoding);
}
if (logger.isDebugEnabled())
{
logger.debug("Resulting object is " + ClassUtils.getSimpleName(result.getClass()));
}
return result;
}
catch (Exception e)
{
throw new TransformerException(this, e);
}
}
}