src/versit/qversitcontactpluginloader_p.cpp
changeset 5 603d3f8b6302
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/versit/qversitcontactpluginloader_p.cpp	Mon Oct 04 01:37:06 2010 +0300
@@ -0,0 +1,125 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QPluginLoader>
+
+#include "qversitcontactpluginloader_p.h"
+#include "qmobilitypluginsearch.h"
+
+QTM_USE_NAMESPACE
+
+/*!
+   A less-than function for factory indices (see QVersitContactHandlerFactory::index()).
+   Positive values come first (ascendingly), then zero, then negative values (ascendingly).
+ */
+bool factoryLessThan(QVersitContactHandlerFactory* a, QVersitContactHandlerFactory* b) {
+    if ((a->index() > 0 && b->index() > 0)
+            || (a->index() < 0 && b->index() < 0))
+        // same sign
+        return a->index() < b->index();
+    else
+        // a is zero
+        // or b is zero
+        // or opposite sign
+        return b->index() < a->index();
+}
+
+QVersitContactPluginLoader* QVersitContactPluginLoader::mInstance = NULL;
+
+/*!
+ * \class QVersitContactPluginLoader
+ * This is a singleton class that loads Versit plugins for contacts processing
+ */
+
+QVersitContactPluginLoader::QVersitContactPluginLoader()
+{
+}
+
+/*!
+ * Returns the singleton instance of the QVersitContactPluginLoader.
+ */
+QVersitContactPluginLoader* QVersitContactPluginLoader::instance()
+{
+    if (!mInstance)
+        mInstance = new QVersitContactPluginLoader;
+    return mInstance;
+}
+
+void QVersitContactPluginLoader::loadPlugins() {
+    QStringList plugins = mobilityPlugins(QLatin1String("versit"));
+    if (plugins != mPluginPaths) {
+        mPluginPaths = plugins;
+
+        foreach (const QString& pluginPath, mPluginPaths) {
+            QPluginLoader qpl(pluginPath);
+            QObject* plugin = qpl.instance();
+            QVersitContactHandlerFactory* contactPlugin =
+                qobject_cast<QVersitContactHandlerFactory*>(plugin);
+            if (contactPlugin && !mLoadedFactories.contains(contactPlugin->name())) {
+                mLoadedFactories.insert(contactPlugin->name());
+                mContactHandlerFactories.append(contactPlugin);
+            }
+        }
+        qSort(mContactHandlerFactories.begin(), mContactHandlerFactories.end(), factoryLessThan);
+    }
+}
+
+/*!
+ * Creates and returns handlers from the plugin.  If \a profile is the empty string, only handlers
+ * with an empty profile list are returned.  If \a profile is nonempty, only handlers with either
+ * an empty profile list or a profile list that contains the given \a profile are returned.
+ *
+ * The caller is responsible for deleting all returned handlers.
+ */
+QList<QVersitContactHandler*> QVersitContactPluginLoader::createContactHandlers(const QString& profile)
+{
+    loadPlugins();
+
+    QList<QVersitContactHandler*> handlers;
+    foreach (const QVersitContactHandlerFactory* factory, mContactHandlerFactories) {
+        if (factory->profiles().isEmpty() ||
+                (!profile.isEmpty() && factory->profiles().contains(profile))) {
+            QVersitContactHandler* handler = factory->createHandler();
+            handlers.append(handler);
+        }
+    }
+    return handlers;
+}