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39
40#ifndef QFACTORYLOADER_P_H
41#define QFACTORYLOADER_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "QtCore/qglobal.h"
55#ifndef QT_NO_QOBJECT
56
57#include "QtCore/qobject.h"
58#include "QtCore/qstringlist.h"
59#include "QtCore/qcborvalue.h"
60#include "QtCore/qjsonobject.h"
61#include "QtCore/qjsondocument.h"
62#include "QtCore/qmap.h"
63#include "QtCore/qendian.h"
64#if QT_CONFIG(library)
65#include "private/qlibrary_p.h"
66#endif
67
68QT_BEGIN_NAMESPACE
69
70QJsonDocument qJsonFromRawLibraryMetaData(const char *raw, qsizetype size, QString *errMsg);
71
72class QFactoryLoaderPrivate;
73class Q_CORE_EXPORT QFactoryLoader : public QObject
74{
75 Q_OBJECT
76 Q_DECLARE_PRIVATE(QFactoryLoader)
77
78public:
79 explicit QFactoryLoader(const char *iid,
80 const QString &suffix = QString(),
81 Qt::CaseSensitivity = Qt::CaseSensitive);
82
83#if QT_CONFIG(library)
84 ~QFactoryLoader();
85
86 void update();
87 static void refreshAll();
88
89#if defined(Q_OS_UNIX) && !defined (Q_OS_MAC)
90 QLibraryPrivate *library(const QString &key) const;
91#endif // Q_OS_UNIX && !Q_OS_MAC
92#endif // QT_CONFIG(library)
93
94 QMultiMap<int, QString> keyMap() const;
95 int indexOf(const QString &needle) const;
96
97 QList<QJsonObject> metaData() const;
98 QObject *instance(int index) const;
99};
100
101template <class PluginInterface, class FactoryInterface, typename ...Args>
102PluginInterface *qLoadPlugin(const QFactoryLoader *loader, const QString &key, Args &&...args)
103{
104 const int index = loader->indexOf(key);
105 if (index != -1) {
106 QObject *factoryObject = loader->instance(index);
107 if (FactoryInterface *factory = qobject_cast<FactoryInterface *>(factoryObject))
108 if (PluginInterface *result = factory->create(key, std::forward<Args>(args)...))
109 return result;
110 }
111 return nullptr;
112}
113
114template <class PluginInterface, class FactoryInterface, typename Arg>
115Q_DECL_DEPRECATED PluginInterface *qLoadPlugin1(const QFactoryLoader *loader, const QString &key, Arg &&arg)
116{ return qLoadPlugin<PluginInterface, FactoryInterface>(loader, key, std::forward<Arg>(arg)); }
117
118QT_END_NAMESPACE
119
120#endif // QT_NO_QOBJECT
121
122#endif // QFACTORYLOADER_P_H
123

source code of qtbase/src/corelib/plugin/qfactoryloader_p.h