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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 ContentHeaderBody extends AMQBody
{
public static final byte TYPE = 2;
public int classId;
public int weight;
/** unsigned long but java can't handle that anyway when allocating byte array */
public long bodySize;
/** must never be null */
public ContentHeaderProperties properties;
public ContentHeaderBody()
{
}
public ContentHeaderBody(ContentHeaderProperties props, int classId)
{
properties = props;
this.classId = classId;
}
public ContentHeaderBody(int classId, int weight, ContentHeaderProperties props, long bodySize)
{
this(props, classId);
this.weight = weight;
this.bodySize = bodySize;
}
protected byte getType()
{
return TYPE;
}
protected void populateFromBuffer(ByteBuffer buffer, long size) throws AMQFrameDecodingException
{
classId = buffer.getUnsignedShort();
weight = buffer.getUnsignedShort();
bodySize = buffer.getLong();
int propertyFlags = buffer.getUnsignedShort();
ContentHeaderPropertiesFactory factory = ContentHeaderPropertiesFactory.getInstance();
properties = factory.createContentHeaderProperties(classId, propertyFlags, buffer, (int)size - 14);
}
/**
* Helper method that is used currently by the persistence layer (by BDB at the moment).
* @param buffer
* @param size
* @return
* @throws AMQFrameDecodingException
*/
public static ContentHeaderBody createFromBuffer(ByteBuffer buffer, long size) throws AMQFrameDecodingException
{
ContentHeaderBody body = new ContentHeaderBody();
body.populateFromBuffer(buffer, size);
return body;
}
public int getSize()
{
return 2 + 2 + 8 + 2 + properties.getPropertyListSize();
}
public void writePayload(ByteBuffer buffer)
{
EncodingUtils.writeUnsignedShort(buffer, classId);
EncodingUtils.writeUnsignedShort(buffer, weight);
buffer.putLong(bodySize);
EncodingUtils.writeUnsignedShort(buffer, properties.getPropertyFlags());
properties.writePropertyListPayload(buffer);
}
public static AMQFrame createAMQFrame(int channelId, int classId, int weight, BasicContentHeaderProperties properties,
long bodySize)
{
final AMQFrame frame = new AMQFrame();
frame.channel = channelId;
frame.bodyFrame = new ContentHeaderBody(classId, weight, properties, bodySize);
return frame;
}
public static AMQFrame createAMQFrame(int channelId, ContentHeaderBody body)
{
final AMQFrame frame = new AMQFrame();
frame.channel = channelId;
frame.bodyFrame = body;
return frame;
}
}
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