MsgRetrievingFunction.h

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/****************************************************************************/
// Encapsulates an object's method for using it as a message retriever
/****************************************************************************/
// SUMO, Simulation of Urban MObility; see http://sumo.sourceforge.net/
// Copyright 2001-2010 DLR (http://www.dlr.de/) and contributors
/****************************************************************************/
//
//   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.
//
/****************************************************************************/
#ifndef MsgRetrievingFunction_h
#define MsgRetrievingFunction_h


// ===========================================================================
// included modules
// ===========================================================================
#ifdef _MSC_VER
#include <windows_config.h>
#else
#include <config.h>
#endif

#include <string>
#include <sstream>
#include <utils/iodevices/OutputDevice.h>
#include "MsgHandler.h"


// ===========================================================================
// class definitions
// ===========================================================================
template< class T >
class MsgRetrievingFunction : public OutputDevice {
public:
    typedef void(T::* Operation)(const MsgHandler::MsgType, const std::string &);


    MsgRetrievingFunction(T* object, Operation operation, MsgHandler::MsgType type) :
            myObject(object),
            myOperation(operation),
            myMsgType(type) {}


    ~MsgRetrievingFunction() throw() {}


protected:

    std::ostream &getOStream() throw() {
        return myMessage;
    }


    virtual void postWriteHook() throw() {
        (myObject->*myOperation)(myMsgType, myMessage.str());
        myMessage.str("");
    }


private:
    T* myObject;

    Operation myOperation;

    MsgHandler::MsgType myMsgType;

    std::ostringstream myMessage;

};


#endif

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