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/*
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* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ENTITYINSTANCEFACTORY_H
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#define ENTITYINSTANCEFACTORY_H
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#include <QString>
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#include <QVariant>
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#include <QHash>
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namespace CuteEntityManager {
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class Entity;
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class EntityInstanceFactory {
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public:
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static Entity *createInstance(const char *className);
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static Entity *createInstance(const QString &className);
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static Entity *createInstance(int metaTypeId);
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static Entity *createInstance(const char *className,
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const QHash<QString, QVariant> &attributes);
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static Entity *setAttributes(Entity *&e,
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const QHash<QString, QVariant> &attributes,
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QHash<QString, QMetaProperty> metaprops);
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static Entity *setAttributes(Entity *&e,
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const QHash<QString, QVariant> &attributes);
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static const QString extractEntityType(const QString &s);
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static Entity *newSuperClassInstance(const Entity *e);
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static Entity *createInstance(const QMetaObject *object);
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static QList<QSharedPointer<Entity>> castQVariantList(QVariant &list);
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static QSharedPointer<Entity> castQVariant(QVariant &entity);
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static QStringList getRegisteredClasses();
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template<typename T>
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static Entity *createInstance() {
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return EntityInstanceFactory::createInstance(qMetaTypeId<T>());
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}
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//http://www.mimec.org/node/350
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template<typename T>
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static void registerClass() {
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if (!EntityInstanceFactory::instance.contains(
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T::staticMetaObject.className())) {
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EntityInstanceFactory::instance.insert( T::staticMetaObject.className(),
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&constructorHelper<T> );
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QString lName = "QList<QSharedPointer<";
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lName.append(T::staticMetaObject.className());
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lName.append(">>");
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qRegisterMetaType<QList<QSharedPointer<T>>>(lName.toLatin1().constData());
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}
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}
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static Entity *createObject( const QByteArray &className) {
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Constructor constructor = EntityInstanceFactory::instance.value( className );
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if ( constructor == nullptr ) {
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return nullptr;
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}
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return (*constructor)();
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}
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private:
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typedef Entity *(*Constructor)();
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template<typename T>
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static Entity *constructorHelper() {
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return new T();
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}
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static QHash<QByteArray, Constructor> instance;
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protected:
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EntityInstanceFactory();
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};
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}
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#endif // ENTITYINSTANCEFACTORY_H
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