source: qutecom-coip/libs/owutil/util/src/IStateDPContext.cpp @ 125:d648f4cb122f

/*
 * QuteCom, a voice over Internet phone
 * Copyright (C) 2010 Mbdsys
 *
 * 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
 */

#include <util/IStateDPContext.h>

#include <util/IStateDPState.h>
#include <util/Logger.h>
#include <util/SafeDelete.h>
#include <util/String.h>

IStateDPContext::IStateDPContext()
        : NO_STATE_ID(-1) {
        _currentState = NULL;
        _stateDPMutex = new QMutex();
}

IStateDPContext::~IStateDPContext() {
        OWSAFE_DELETE(_stateDPMutex);

        for (StateMap::iterator it = _stateMap.begin();
                it != _stateMap.end();
                ++it) {
                delete (*it).second;
        }
}

void IStateDPContext::addState(int stateId, IStateDPState * state) {
        if (state) {
                StateMap::iterator it = _stateMap.find(stateId);
                if (it != _stateMap.end()) {
                        LOG_FATAL("id already in map. Cannot add this state.");
                        return;
                }

                _stateMap[stateId] = state;
        }
}

int IStateDPContext::getStateId() const {
        int result = NO_STATE_ID;

        if (_currentState) {
                for (StateMap::const_iterator it = _stateMap.begin();
                        it != _stateMap.end();
                        ++it) {
                        if ((*it).second == _currentState) {
                                result = (*it).first;
                                break;
                        }
                }
        }

        return result;
}

void IStateDPContext::setState(int stateId) {
        QMutexLocker lock(_stateDPMutex);

        StateMap::iterator it = _stateMap.find(stateId);
        if (it == _stateMap.end()) {
                LOG_FATAL("id not in map. Cannot set this state.");
                return;
        }

        LOG_DEBUG("switch state to " + String::fromNumber(stateId));
        _currentState = (*it).second;
}

void IStateDPContext::execute() {
        _stateDPMutex->lock();
        IStateDPState * state = _currentState;
        _stateDPMutex->unlock();

        if (state) {
                state->execute();
        }
}