// The contents of this file are subject to the Mozilla Public License
// Version 1.1 (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.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.
//
// The Original Code is RabbitMQ.
//
// The Initial Developer of the Original Code is VMware, Inc.
// Copyright (c) 2007-2011 VMware, Inc. All rights reserved.
//
package com.rabbitmq.client;
/**
* Interface to a container for an AMQP method-and-arguments, with optional content header and body.
*/
public interface Command {
/**
* Retrieves the {@link Method} held within this Command. Downcast to
* concrete (implementation-specific!) subclasses as necessary.
*
* @return the command's method.
*/
Method getMethod();
/**
* Retrieves the ContentHeader subclass instance held as part of this Command, if any.
*
* Downcast to one of the inner classes of AMQP,
* for instance {@link AMQP.BasicProperties}, as appropriate.
*
* @return the Command's {@link ContentHeader}, or null if none
*/
ContentHeader getContentHeader();
/**
* Retrieves the body byte array that travelled as part of this
* Command, if any.
*
* @return the Command's content body, or null if none
*/
byte[] getContentBody();
}