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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.transport;
import java.nio.ByteBuffer;
import org.apache.qpid.transport.network.NetworkDelegate;
import org.apache.qpid.transport.network.NetworkEvent;
import org.apache.qpid.transport.network.Frame;
/**
* ProtocolHeader
*
* @author Rafael H. Schloming
*/
public final class ProtocolHeader implements NetworkEvent, ProtocolEvent
{
private static final byte[] AMQP = {'A', 'M', 'Q', 'P' };
private static final byte CLASS = 1;
final private byte protoClass;
final private byte instance;
final private byte major;
final private byte minor;
private int channel;
public ProtocolHeader(byte protoClass, byte instance, byte major, byte minor)
{
this.protoClass = protoClass;
this.instance = instance;
this.major = major;
this.minor = minor;
}
public ProtocolHeader(int instance, int major, int minor)
{
this(CLASS, (byte) instance, (byte) major, (byte) minor);
}
public byte getInstance()
{
return instance;
}
public byte getMajor()
{
return major;
}
public byte getMinor()
{
return minor;
}
public int getChannel()
{
return channel;
}
public void setChannel(int channel)
{
this.channel = channel;
}
public byte getEncodedTrack()
{
return Frame.L1;
}
public boolean isConnectionControl()
{
return false;
}
public ByteBuffer toByteBuffer()
{
ByteBuffer buf = ByteBuffer.allocate(8);
buf.put(AMQP);
buf.put(protoClass);
buf.put(instance);
buf.put(major);
buf.put(minor);
buf.flip();
return buf;
}
public <C> void delegate(C context, ProtocolDelegate<C> delegate)
{
delegate.init(context, this);
}
public void delegate(NetworkDelegate delegate)
{
delegate.init(this);
}
public String toString()
{
return String.format("AMQP.%d %d-%d", instance, major, minor);
}
}
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