dependencymanager.hpp

/* Copyright (c) 2014, The Nuria Project
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *    1. The origin of this software must not be misrepresented; you must not
 *       claim that you wrote the original software. If you use this software
 *       in a product, an acknowledgment in the product documentation would be
 *       appreciated but is not required.
 *    2. Altered source versions must be plainly marked as such, and must not be
 *       misrepresented as being the original software.
 *    3. This notice may not be removed or altered from any source
 *       distribution.
 */

#ifndef NURIA_DEPEDENCYMANAGER_HPP
#define NURIA_DEPEDENCYMANAGER_HPP

#include "essentials.hpp"
#include <QObject>

namespace Nuria {
class DependencyManagerPrivate;

class NURIA_CORE_EXPORT DependencyManager : public QObject {
    Q_OBJECT
public:
    
    enum ThreadingPolicy {
        DefaultPolicy,
        
        ApplicationGlobal,
        
        SingleThread,
        
        ThreadLocal
    };
    
    ~DependencyManager ();
    
    static DependencyManager *instance ();
    
    ThreadingPolicy defaultThreadingPolicy () const;
    
    void setDefaultThreadingPolicy (ThreadingPolicy policy);
    
    void *objectByName (const QString &name, int type = -1, ThreadingPolicy policy = DefaultPolicy);
    
    int objectType (const QString &name, ThreadingPolicy policy = DefaultPolicy) const;
    
    inline bool hasObject (const QString &name, ThreadingPolicy policy = DefaultPolicy) const
    { return objectType (name, policy) != -1; }
    
    void storeObject (const QString &name, void *object, int type,
              ThreadingPolicy policy = DefaultPolicy);
    
    template< typename T >
    void storeObject (const QString &name, T *object)
    { storeObject (name, object, qMetaTypeId< T * > ()); }
    
    template< typename T >
    inline static T *get (const QString &name, ThreadingPolicy policy = DefaultPolicy) {
        return static_cast< T * > (instance ()->objectByName (name, qMetaTypeId< T * > (), policy));
    }
    
private slots:
    
    void freeAllObjects ();
    
private:
    explicit DependencyManager (QObject *parent = 0);
    
    DependencyManagerPrivate *d_ptr;
};

}

#define NURIA_DEPENDENCY(T) Nuria::DependencyManager::get< T > (#T)

#endif // NURIA_DEPEDENCYMANAGER_HPP