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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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.message;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.BasicContentHeaderProperties;
import org.apache.qpid.framing.ContentHeaderBody;
import javax.jms.JMSException;
import java.util.HashMap;
import java.util.Map;
import java.util.List;
public class MessageFactoryRegistry
{
private final Map _mimeToFactoryMap = new HashMap();
public void registerFactory(String mimeType, MessageFactory mf)
{
if (mf == null)
{
throw new IllegalArgumentException("Message factory must not be null");
}
_mimeToFactoryMap.put(mimeType, mf);
}
public MessageFactory deregisterFactory(String mimeType)
{
return (MessageFactory) _mimeToFactoryMap.remove(mimeType);
}
/**
* Create a message. This looks up the MIME type from the content header and instantiates the appropriate
* concrete message type.
* @param deliveryTag the AMQ message id
* @param redelivered true if redelivered
* @param contentHeader the content header that was received
* @param bodies a list of ContentBody instances
* @return the message.
* @throws AMQException
* @throws JMSException
*/
public AbstractJMSMessage createMessage(long deliveryTag, boolean redelivered,
ContentHeaderBody contentHeader,
List bodies) throws AMQException, JMSException
{
BasicContentHeaderProperties properties = (BasicContentHeaderProperties) contentHeader.properties;
MessageFactory mf = (MessageFactory) _mimeToFactoryMap.get(properties.getContentType());
if (mf == null)
{
throw new AMQException("Unsupport MIME type of " + properties.getContentType());
}
else
{
return mf.createMessage(deliveryTag, redelivered, contentHeader, bodies);
}
}
public AbstractJMSMessage createMessage(String mimeType) throws AMQException, JMSException
{
if (mimeType == null)
{
throw new IllegalArgumentException("Mime type must not be null");
}
MessageFactory mf = (MessageFactory) _mimeToFactoryMap.get(mimeType);
if (mf == null)
{
throw new AMQException("Unsupport MIME type of " + mimeType);
}
else
{
return mf.createMessage();
}
}
/**
* Construct a new registry with the default message factories registered
* @return a message factory registry
*/
public static MessageFactoryRegistry newDefaultRegistry()
{
MessageFactoryRegistry mf = new MessageFactoryRegistry();
mf.registerFactory("text/plain", new JMSTextMessageFactory());
mf.registerFactory("text/xml", new JMSTextMessageFactory());
mf.registerFactory("application/octet-stream", new JMSBytesMessageFactory());
mf.registerFactory(JMSObjectMessage.MIME_TYPE, new JMSObjectMessageFactory());
mf.registerFactory(null, new JMSBytesMessageFactory());
return mf;
}
}
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