/*
* Copyright 2002-2007 the original author or authors.
*
* 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.springframework.jms.support.converter;
import java.io.ByteArrayOutputStream;
import javax.jms.BytesMessage;
import javax.jms.JMSException;
/**
* A subclass of {@link SimpleMessageConverter} for the JMS 1.0.2 specification,
* not relying on JMS 1.1 methods like SimpleMessageConverter itself.
* This class can be used for JMS 1.0.2 providers, offering the same functionality
* as SimpleMessageConverter does for JMS 1.1 providers.
*
* <p>The only difference to the default SimpleMessageConverter is that BytesMessage
* is handled differently: namely, without using the <code>getBodyLength()</code>
* method which has been introduced in JMS 1.1 and is therefore not available on a
* JMS 1.0.2 provider.
*
* @author Juergen Hoeller
* @since 1.1.1
* @see javax.jms.BytesMessage#getBodyLength()
*/
public class SimpleMessageConverter102 extends SimpleMessageConverter {
public static final int BUFFER_SIZE = 4096;
/**
* Overrides superclass method to copy bytes from the message into a
* ByteArrayOutputStream, using a buffer, to avoid using the
* <code>getBodyLength()</code> method which has been introduced in
* JMS 1.1 and is therefore not available on a JMS 1.0.2 provider.
* @see javax.jms.BytesMessage#getBodyLength()
*/
protected byte[] extractByteArrayFromMessage(BytesMessage message) throws JMSException {
ByteArrayOutputStream baos = new ByteArrayOutputStream(BUFFER_SIZE);
byte[] buffer = new byte[BUFFER_SIZE];
int bufferCount = -1;
while ((bufferCount = message.readBytes(buffer)) >= 0) {
baos.write(buffer, 0, bufferCount);
if (bufferCount < BUFFER_SIZE) {
break;
}
}
return baos.toByteArray();
}
}