autoDoc/HTML/---libInvertedFile-include-CXEVCommunication-h

    /* -*- mode: c++ -*-
    */
    /*

        GIFT, a flexible content based image retrieval system.
        Copyright (C) 1998, 1999, 2000 CUI, University of Geneva

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program; if not, write to the Free Software
        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    */
    // -*- mode: c++ -*-
    #ifndef _CXEVCOMMUNICATION
    #define _CXEVCOMMUNICATION

    #include <string> //mSessionID

    #include "CXMLElementVisitor.h" //base class

    class CCommunicationHandler;

    /**

       A visitor visiting document trees built from
       the communication.

    */
    class CXEVCommunication:public CXMLElementVisitor{

     protected:
        /**
    	the session in which this message is sent
         */
        string mSessionID;
        /** CCommunicationHandler which will build the response from
    	our calls
         */
        CCommunicationHandler* mHandler;
     public:
        /** constructor.
    	When traversing the tree we need to
    	call member functions of
    	the communication handler with
    	subtrees of the tree we traverse.
         */
        CXEVCommunication(CCommunicationHandler* inHandler);
        /** actually carrying out the visit */
        virtual bool startVisit(const CXMLElement& inVisited);
        /** actually carrying out the visit */
        virtual void endVisit(const CXMLElement& inVisited);
    };

    #endif