org.eclipse.jetty.websocket.api.extensions.Extension Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.api.extensions;
/**
* Interface for WebSocket Extensions.
*
* That work is performed by the two {@link FrameHandler} implementations for incoming and outgoing frame handling.
*/
public interface Extension extends IncomingFrames, OutgoingFrames
{
/**
* The active configuration for this extension.
*
* @return the configuration for this extension. never null.
*/
public ExtensionConfig getConfig();
/**
* The Sec-WebSocket-Extensions name for this extension.
*
* Also known as the extension-token per Section 9.1. Negotiating Extensions.
*/
public String getName();
/**
* Used to indicate that the extension makes use of the RSV1 bit of the base websocket framing.
*
* This is used to adjust validation during parsing, as well as a checkpoint against 2 or more extensions all simultaneously claiming ownership of RSV1.
*
* @return true if extension uses RSV1 for its own purposes.
*/
public abstract boolean isRsv1User();
/**
* Used to indicate that the extension makes use of the RSV2 bit of the base websocket framing.
*
* This is used to adjust validation during parsing, as well as a checkpoint against 2 or more extensions all simultaneously claiming ownership of RSV2.
*
* @return true if extension uses RSV2 for its own purposes.
*/
public abstract boolean isRsv2User();
/**
* Used to indicate that the extension makes use of the RSV3 bit of the base websocket framing.
*
* This is used to adjust validation during parsing, as well as a checkpoint against 2 or more extensions all simultaneously claiming ownership of RSV3.
*
* @return true if extension uses RSV3 for its own purposes.
*/
public abstract boolean isRsv3User();
/**
* Used to indicate that the extension works as a decoder of TEXT Data Frames.
*
* This is used to adjust validation during parsing/generating, as per spec TEXT Data Frames can only contain UTF8 encoded String data.
*
* Example: a compression extension will process a compressed set of text data, the parser/generator should no longer be concerned about the validity of the
* TEXT Data Frames as this is now the responsibility of the extension.
*
* @return true if extension will process TEXT Data Frames, false if extension makes no modifications of TEXT Data Frames. If false, the parser/generator is
* now free to validate the conformance to spec of TEXT Data Frames.
*/
public abstract boolean isTextDataDecoder();
/**
* Set the next {@link IncomingFrames} to call in the chain.
*
* @param nextIncoming
* the next incoming extension
*/
public void setNextIncomingFrames(IncomingFrames nextIncoming);
/**
* Set the next {@link OutgoingFrames} to call in the chain.
*
* @param nextOutgoing
* the next outgoing extension
*/
public void setNextOutgoingFrames(OutgoingFrames nextOutgoing);
}