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/*
* Request.h
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef MAD_COMMON_REQUEST_H_
#define MAD_COMMON_REQUEST_H_
#include "RequestBase.h"
#include "Exception.h"
#include <memory>
#include <sigc++/hide.h>
namespace Mad {
namespace Common {
template<typename T = void> class Request : public RequestBase {
private:
sigc::signal<void,const Request<T>&> finished;
std::auto_ptr<T> res;
Exception exp;
public:
typedef sigc::slot<void,const Request<T>&> slot_type;
protected:
Request(slot_type slot) : exp(Exception::NOT_FINISHED) {
finished.connect(slot);
finished.connect(sigc::hide(signalFinished().make_slot()));
}
void finish(std::auto_ptr<T> result) {res = result; finished(*this);}
void finish(const T& result) {res.reset(new T(result)); finished(*this);}
void finishWithError(const Exception &e) {exp = e; finished(*this);}
public:
const T& getResult() const throw(Exception) {
if(res.get())
return *res;
throw exp;
}
};
template<> class Request<void> : public RequestBase {
private:
sigc::signal<void,const Request<void>&> finished;
bool isFinished;
Exception exp;
public:
typedef sigc::slot<void,const Request<void>&> slot_type;
protected:
Request(slot_type slot) : isFinished(false), exp(Exception::NOT_FINISHED) {
finished.connect(slot);
finished.connect(sigc::hide(signalFinished().make_slot()));
}
void finish() {isFinished = true; finished(*this);}
void finishWithError(const Exception &e) {exp = e; finished(*this);}
public:
void getResult() const throw(Exception) {
if(isFinished)
return;
throw exp;
}
};
}
}
#endif /* MAD_COMMON_REQUEST_H_ */
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