File indexing completed on 2024-06-16 04:50:11

 /*
     SPDX-FileCopyrightText: 2007-2008 Volker Krause <vkrause@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #pragma once
 
 #include "akonadicore_export.h"
 #include "attribute.h"
 
 #include <memory>
 
 namespace Akonadi
 {
 class AttributeFactoryPrivate;
 
 /**
  * @short Provides the functionality of registering and creating arbitrary
  *        entity attributes.
  *
  * This class provides the functionality of registering and creating arbitrary Attributes for Entity
  * and its subclasses (e.g. Item and Collection).
  *
  * @code
  *
  * // register the type first
  * Akonadi::AttributeFactory::registerAttribute<SecrecyAttribute>();
  *
  * ...
  *
  * // use it anywhere else in the application
  * SecrecyAttribute *attr = Akonadi::AttributeFactory::createAttribute( "secrecy" );
  *
  * @endcode
  *
  * @author Volker Krause <vkrause@kde.org>
  */
 class AKONADICORE_EXPORT AttributeFactory
 {
 public:
     /// @cond PRIVATE
     ~AttributeFactory();
     /// @endcond
 
     /**
      * Registers a custom attribute of type T.
      * The same attribute cannot be registered more than once.
      */
     template<typename T>
     inline static void registerAttribute()
     {
         static_assert(std::is_default_constructible<T>::value, "An Attribute must be default-constructible.");
         AttributeFactory::self()->registerAttribute(std::unique_ptr<T>{new T{}});
     }
 
     /**
      * Creates an entity attribute object of the given type.
      * If the type has not been registered, creates a DefaultAttribute.
      *
      * @param type The attribute type.
      */
     static Attribute *createAttribute(const QByteArray &type);
 
 protected:
     /// @cond PRIVATE
     explicit AttributeFactory();
 
 private:
     Q_DISABLE_COPY(AttributeFactory)
     static AttributeFactory *self();
     void registerAttribute(std::unique_ptr<Attribute> attribute);
 
     const std::unique_ptr<AttributeFactoryPrivate> d;
     /// @endcond
 };
 
 } // namespace Akonadi