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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.framing;
import org.apache.mina.common.ByteBuffer;
public class ContentBody extends AMQBody
{
public static final byte TYPE = 3;
public ByteBuffer payload;
protected byte getType()
{
return TYPE;
}
public int getSize()
{
return (payload == null ? 0 : payload.limit());
}
public void writePayload(ByteBuffer buffer)
{
if (payload != null)
{
ByteBuffer copy = payload.duplicate();
buffer.put(copy.rewind());
}
}
protected void populateFromBuffer(ByteBuffer buffer, long size) throws AMQFrameDecodingException
{
if (size > 0)
{
payload = buffer.slice();
payload.limit((int) size);
buffer.skip((int) size);
}
}
public void reduceBufferToFit()
{
if (payload != null && (payload.remaining() < payload.capacity() / 2))
{
int size = payload.limit();
ByteBuffer newPayload = ByteBuffer.allocate(size);
newPayload.put(payload);
newPayload.flip();
//reduce reference count on payload
payload.release();
payload = newPayload;
}
}
public static AMQFrame createAMQFrame(int channelId, ContentBody body)
{
final AMQFrame frame = new AMQFrame();
frame.channel = channelId;
frame.bodyFrame = body;
return frame;
}
}
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