77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
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/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_LIBJINGLE_XMPP_MODULEIMPL_H_
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#define WEBRTC_LIBJINGLE_XMPP_MODULEIMPL_H_
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#include "webrtc/libjingle/xmpp/module.h"
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#include "webrtc/libjingle/xmpp/xmppengine.h"
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namespace buzz {
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//! This is the base implementation class for extension modules.
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//! An engine is registered with the module and the module then hooks the
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//! appropriate parts of the engine to implement that set of features. It is
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//! important to unregister modules before destructing the engine.
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class XmppModuleImpl {
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protected:
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XmppModuleImpl();
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virtual ~XmppModuleImpl();
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//! Register the engine with the module. Only one engine can be associated
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//! with a module at a time. This method will return an error if there is
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//! already an engine registered.
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XmppReturnStatus RegisterEngine(XmppEngine* engine);
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//! Gets the engine that this module is attached to.
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XmppEngine* engine();
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//! Process the given stanza.
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//! The module must return true if it has handled the stanza.
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//! A false return value causes the stanza to be passed on to
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//! the next registered handler.
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virtual bool HandleStanza(const XmlElement *) { return false; };
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private:
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//! The ModuleSessionHelper nested class allows the Module
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//! to hook into and get stanzas and events from the engine.
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class ModuleStanzaHandler : public XmppStanzaHandler {
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friend class XmppModuleImpl;
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ModuleStanzaHandler(XmppModuleImpl* module) :
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module_(module) {
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}
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bool HandleStanza(const XmlElement* stanza) {
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return module_->HandleStanza(stanza);
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}
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XmppModuleImpl* module_;
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};
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friend class ModuleStanzaHandler;
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XmppEngine* engine_;
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ModuleStanzaHandler stanza_handler_;
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};
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// This macro will implement the XmppModule interface for a class
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// that derives from both XmppModuleImpl and XmppModule
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#define IMPLEMENT_XMPPMODULE \
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XmppReturnStatus RegisterEngine(XmppEngine* engine) { \
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return XmppModuleImpl::RegisterEngine(engine); \
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}
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}
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#endif // WEBRTC_LIBJINGLE_XMPP_MODULEIMPL_H_
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