1 /* 2 * libjingle 3 * Copyright 2011, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_XMPP_RECEIVETASK_H_ 29 #define TALK_XMPP_RECEIVETASK_H_ 30 31 #include "talk/xmpp/xmpptask.h" 32 33 namespace buzz { 34 35 // A base class for receiving stanzas. Override WantsStanza to 36 // indicate that a stanza should be received and ReceiveStanza to 37 // process it. Once started, ReceiveStanza will be called for all 38 // stanzas that return true when passed to WantsStanza. This saves 39 // you from having to remember how to setup the queueing and the task 40 // states, etc. 41 class ReceiveTask : public XmppTask { 42 public: 43 explicit ReceiveTask(XmppTaskParentInterface* parent) : 44 XmppTask(parent, XmppEngine::HL_TYPE) {} 45 virtual int ProcessStart(); 46 47 protected: 48 virtual bool HandleStanza(const XmlElement* stanza); 49 50 // Return true if the stanza should be received. 51 virtual bool WantsStanza(const XmlElement* stanza) = 0; 52 // Process the received stanza. 53 virtual void ReceiveStanza(const XmlElement* stanza) = 0; 54 }; 55 56 } // namespace buzz 57 58 #endif // TALK_XMPP_RECEIVETASK_H_ 59
