/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 as published by the Free Software Foundation** and appearing in the file LICENSE.GPL included in the packaging of** this file.  Please review the following information to ensure GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#include "qfactoryloader_p.h"#ifndef QT_NO_LIBRARY#include "qfactoryinterface.h"#include "qmap.h"#include <qdir.h>#include <qsettings.h>#include <qdebug.h>#include "qmutex.h"#include "qplugin.h"#include "qpluginloader.h"#include "private/qobject_p.h"#include "private/qcoreapplication_p.h"class QFactoryLoaderPrivate : public QObjectPrivate{    Q_DECLARE_PUBLIC(QFactoryLoader)public:    QFactoryLoaderPrivate(){}    mutable QMutex mutex;    QByteArray iid;    QList<QLibraryPrivate*> libraryList;    QMap<QString,QLibraryPrivate*> keyMap;    QStringList keyList;};QFactoryLoader::QFactoryLoader(const char *iid,                               const QStringList &paths, const QString &suffix,                               Qt::CaseSensitivity cs)    : QObject(*new QFactoryLoaderPrivate){    moveToThread(QCoreApplicationPrivate::mainThread());    Q_D(QFactoryLoader);    d->iid = iid;    QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));    for (int i = 0; i < paths.count(); ++i) {        QString path = paths.at(i) + suffix;        if (!QDir(path).exists(QLatin1String(".")))            continue;        QStringList plugins = QDir(path).entryList(QDir::Files);        QLibraryPrivate *library = 0;        for (int j = 0; j < plugins.count(); ++j) {            QString fileName = QDir::cleanPath(path + QLatin1Char('/') + plugins.at(j));            if (qt_debug_component()) {                qDebug() << "QFactoryLoader::QFactoryLoader() looking at" << fileName;            }            library = QLibraryPrivate::findOrCreate(QFileInfo(fileName).canonicalFilePath());            if (!library->isPlugin()) {                library->release();                if (qt_debug_component()) {                    qDebug() << "         not a plugin";                }                continue;            }            QString regkey = QString::fromLatin1("Qt Factory Cache %1.%2/%3:/%4")                             .arg((QT_VERSION & 0xff0000) >> 16)                             .arg((QT_VERSION & 0xff00) >> 8)                             .arg(QLatin1String(iid))                             .arg(fileName);            QStringList reg, keys;            reg = settings.value(regkey).toStringList();            if (reg.count() && library->lastModified == reg[0]) {                keys = reg;                keys.removeFirst();            } else {                if (!library->loadPlugin()) {                    if (qt_debug_component()) {                        qDebug() << "           could not load";                    }                    library->release();                    continue;                }                QObject *instance = library->instance();                if (!instance)                    // ignore plugins that have a valid signature but cannot be loaded.                    continue;                QFactoryInterface *factory = qobject_cast<QFactoryInterface*>(instance);                if (instance && factory && instance->qt_metacast(iid))                    keys = factory->keys();                if (keys.isEmpty())                    library->unload();                reg.clear();                reg << library->lastModified;                reg += keys;                settings.setValue(regkey, reg);            }            if (qt_debug_component()) {                qDebug() << "keys" << keys;            }            if (keys.isEmpty()) {                library->release();                continue;            }            d->libraryList += library;            for (int k = 0; k < keys.count(); ++k) {                // first come first serve, unless the first                // library was built with a future Qt version,                // whereas the new one has a Qt version that fits                // better                QString key = keys.at(k);                if (!cs)                    key = key.toLower();                QLibraryPrivate *previous = d->keyMap.value(key);                if (!previous || (previous->qt_version > QT_VERSION && library->qt_version <= QT_VERSION)) {                    d->keyMap[key] = library;                    d->keyList += keys.at(k);                }            }        }    }}QFactoryLoader::~QFactoryLoader(){    Q_D(QFactoryLoader);    for (int i = 0; i < d->libraryList.count(); ++i)        d->libraryList.at(i)->release();}QStringList QFactoryLoader::keys() const{    Q_D(const QFactoryLoader);    QMutexLocker locker(&d->mutex);    QStringList keys = d->keyList;    QObjectList instances = QPluginLoader::staticInstances();    for (int i = 0; i < instances.count(); ++i)        if (QFactoryInterface *factory = qobject_cast<QFactoryInterface*>(instances.at(i)))            if (instances.at(i)->qt_metacast(d->iid))                    keys += factory->keys();    return keys;}QObject *QFactoryLoader::instance(const QString &key) const{    Q_D(const QFactoryLoader);    QMutexLocker locker(&d->mutex);    QObjectList instances = QPluginLoader::staticInstances();    for (int i = 0; i < instances.count(); ++i)        if (QFactoryInterface *factory = qobject_cast<QFactoryInterface*>(instances.at(i)))            if (instances.at(i)->qt_metacast(d->iid) && factory->keys().contains(key, Qt::CaseInsensitive))                return instances.at(i);    if (QLibraryPrivate* library = d->keyMap.value(key)) {        if (library->instance || library->loadPlugin()) {            if (QObject *obj = library->instance()) {                if (obj && !obj->parent())                    obj->moveToThread(QCoreApplicationPrivate::mainThread());                return obj;            }        }    }    return 0;}#endif // QT_NO_LIBRARY