lazyconditionwalker.hpp

/* Copyright (c) 2014-2015, The Nuria Project
 * The NuriaProject Framework is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * The NuriaProject Framework 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with The NuriaProject Framework.
 * If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef NURIA_LAZYCONDITIONWALKER_HPP
#define NURIA_LAZYCONDITIONWALKER_HPP

#include <QSharedData>

#include "lazyevaluation.hpp"
#include "essentials.hpp"
#include "callback.hpp"

namespace Nuria {

class LazyConditionWalkerPrivate;

class NURIA_CORE_EXPORT LazyConditionWalker {
public:
        
        LazyConditionWalker ();
        
        LazyConditionWalker (const LazyConditionWalker &other);
        
        ~LazyConditionWalker ();
        
        LazyConditionWalker &operator= (const LazyConditionWalker &other);
        
        void onCondition (LazyCondition::Type type, const Callback &method);
        
        void onField (int fieldType, const Callback &method);
        
        void onVariant (int userType, const Callback &method);
        
        LazyCondition walk (const LazyCondition &condition, bool walkArguments = false);
        
private:
        bool walkVariant (QVariant &variant, QVariantList &stack, bool walkArguments);
        bool walkCondition (QVariant &conditionVariant, QVariantList &stack, bool walkArguments);
        bool walkField (QVariant &fieldVariant, QVariantList &stack, bool walkArguments);
        bool walkTestCall (QVariant &callVariant, QVariantList &stack, bool walkArguments);
        
        QSharedDataPointer< LazyConditionWalkerPrivate > d;
        
};

}

#endif // NURIA_LAZYCONDITIONWALKER_HPP