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/*
*
* 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.message;
import java.io.IOException;
import java.nio.charset.Charset;
import javax.jms.JMSException;
import javax.jms.MessageEOFException;
import org.apache.mina.common.ByteBuffer;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.BasicContentHeaderProperties;
import org.apache.qpid.transport.util.Functions;
/**
* @author Apache Software Foundation
*/
public abstract class AbstractBytesMessage extends AbstractJMSMessage
{
/**
* The default initial size of the buffer. The buffer expands automatically.
*/
private static final int DEFAULT_BUFFER_INITIAL_SIZE = 1024;
AbstractBytesMessage(AMQMessageDelegateFactory delegateFactory)
{
this(delegateFactory, null);
}
/**
* Construct a bytes message with existing data.
*
* @param delegateFactory
* @param data the data that comprises this message. If data is null, you get a 1024 byte buffer that is
*/
AbstractBytesMessage(AMQMessageDelegateFactory delegateFactory, ByteBuffer data)
{
super(delegateFactory, data); // this instanties a content header
setContentType(getMimeType());
if (_data == null)
{
allocateInitialBuffer();
}
}
protected void allocateInitialBuffer()
{
_data = ByteBuffer.allocate(DEFAULT_BUFFER_INITIAL_SIZE);
_data.setAutoExpand(true);
}
AbstractBytesMessage(AMQMessageDelegate delegate, ByteBuffer data) throws AMQException
{
super(delegate, data);
setContentType(getMimeType());
}
public void clearBodyImpl() throws JMSException
{
allocateInitialBuffer();
}
public String toBodyString() throws JMSException
{
try
{
if (_data != null)
{
return Functions.str(_data.buf(), 100,0);
}
else
{
return "";
}
}
catch (Exception e)
{
JMSException jmse = new JMSException(e.toString());
jmse.setLinkedException(e);
throw jmse;
}
}
/**
* Check that there is at least a certain number of bytes available to read
*
* @param len the number of bytes
* @throws javax.jms.MessageEOFException if there are less than len bytes available to read
*/
protected void checkAvailable(int len) throws MessageEOFException
{
if (_data.remaining() < len)
{
throw new MessageEOFException("Unable to read " + len + " bytes");
}
}
}
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