common/include/QtCore/5.5.0/QtCore/private/qfactoryloader_p.h

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#ifndef QFACTORYLOADER_P_H
#define QFACTORYLOADER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "QtCore/qobject.h"
#include "QtCore/qstringlist.h"
#include "QtCore/qjsonobject.h"
#include "QtCore/qmap.h"
#include "private/qlibrary_p.h"
#ifndef QT_NO_LIBRARY

QT_BEGIN_NAMESPACE

class QFactoryLoaderPrivate;

class Q_CORE_EXPORT QFactoryLoader : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QFactoryLoader)

public:
    explicit QFactoryLoader(const char *iid,
                   const QString &suffix = QString(),
                   Qt::CaseSensitivity = Qt::CaseSensitive);
    ~QFactoryLoader();

    QList<QJsonObject> metaData() const;
    QObject *instance(int index) const;

#if defined(Q_OS_UNIX) && !defined (Q_OS_MAC)
    QLibraryPrivate *library(const QString &key) const;
#endif

    QMultiMap<int, QString> keyMap() const;
    int indexOf(const QString &needle) const;

    void update();

    static void refreshAll();
};

template <class PluginInterface, class FactoryInterface>
    PluginInterface *qLoadPlugin(const QFactoryLoader *loader, const QString &key)
{
    const int index = loader->indexOf(key);
    if (index != -1) {
        QObject *factoryObject = loader->instance(index);
        if (FactoryInterface *factory = qobject_cast<FactoryInterface *>(factoryObject))
            if (PluginInterface *result = factory->create(key))
                return result;
    }
    return 0;
}

template <class PluginInterface, class FactoryInterface, class Parameter1>
PluginInterface *qLoadPlugin1(const QFactoryLoader *loader,
                              const QString &key,
                              const Parameter1 &parameter1)
{
    const int index = loader->indexOf(key);
    if (index != -1) {
        QObject *factoryObject = loader->instance(index);
        if (FactoryInterface *factory = qobject_cast<FactoryInterface *>(factoryObject))
            if (PluginInterface *result = factory->create(key, parameter1))
                return result;
    }
    return 0;
}

QT_END_NAMESPACE

#endif // QT_NO_LIBRARY

#endif // QFACTORYLOADER_P_H