bagetmodel/src/bagetfactory.cpp
changeset 60 f62f87b200ec
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bagetmodel/src/bagetfactory.cpp	Fri Mar 19 09:35:23 2010 +0200
@@ -0,0 +1,174 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+* 
+* Description:  Widget factory.
+*
+*/
+
+#include <QDebug>
+#include <QStringList>
+#include <QDir>
+#include <QPluginLoader>
+
+#include "bagetfactory.h"
+#include "bagetfactory_p.h"
+#include "baget.h"
+#include "ibagetprovider.h"
+
+/*!
+    \class BagetPluginUnloader
+    \brief Unloads plugin and deletes plugin loader.
+    
+    Holds plugin loader instance and unloads and destroys plugin
+    on it's destructor.
+ */
+
+/*!
+    Constructs a new BagetPluginUnloader with \a pluginLoader and \a parent.
+ */
+BagetPluginUnloader::BagetPluginUnloader(QPluginLoader *pluginLoader, QObject *parent) :
+    QObject(parent), mPluginLoader(pluginLoader)
+{
+}
+
+/*!
+    Destructs the class.
+ */
+BagetPluginUnloader::~BagetPluginUnloader()
+{
+    if (mPluginLoader) {
+        mPluginLoader->unload();
+        delete mPluginLoader;
+    }
+}
+
+/*!
+    \class BagetFactoryPrivate
+    \brief Private implementation of the BagetFactory.
+ */
+
+/*!
+    Constructs a new BagetFactoryPrivate with \a pluginDirectory and \a bagetFactoryPublic.
+ */
+BagetFactoryPrivate::BagetFactoryPrivate(const QString& pluginDirectory, 
+                                         BagetFactory *bagetFactoryPublic) :
+    m_q(bagetFactoryPublic), mPluginDirectory(pluginDirectory)
+{
+}
+
+/*!
+    Destructs the class.
+ */
+BagetFactoryPrivate::~BagetFactoryPrivate()
+{
+}
+
+/*!
+    Creates and returns a Baget based on the given token.
+    \param token Identifies the Baget to be created.
+    \return The created Baget.
+ */
+Baget *BagetFactoryPrivate::createBaget(const BagetToken &token)
+{
+    QStringList pluginPaths;
+
+    // check plugin dirs from root of different drives
+    QFileInfoList drives = QDir::drives();
+    for(int i=0; i < drives.count(); i++) {
+        QFileInfo drive = drives.at(i);
+        QString driveLetter = drive.absolutePath();
+        QString path = driveLetter + mPluginDirectory;
+        if (QDir(path).exists()) {
+            pluginPaths << path;
+        }
+    }
+
+    // check plugin dir relative to current dir
+    if (QDir(mPluginDirectory).exists() && 
+        !pluginPaths.contains(QDir(mPluginDirectory).absolutePath())) {
+        pluginPaths << mPluginDirectory;
+    }
+
+    IBagetProvider *provider(0);
+    QPluginLoader *loader = new QPluginLoader();
+    QObject *plugin(0);
+
+    for(int i=0; i < pluginPaths.count(); i++) {
+        QString path = pluginPaths.at(i);
+        QString fileName = QDir(path).absoluteFilePath(token.mLibrary);
+
+        loader->setFileName(fileName);
+        plugin = loader->instance();
+        provider = qobject_cast<IBagetProvider*>(plugin);
+        if (provider) {
+            break;
+        }
+    }
+
+    Baget *baget(0);
+
+    if (provider) {
+        baget = provider->createBaget(token);
+        if (!baget) {
+            qWarning() << "Baget creation failed.";
+            qWarning() << token.mLibrary << "cannot provide" << token.mUri;
+            loader->unload();
+            delete loader;
+        } else {
+            // unload plugin once baget gets deleted
+            BagetPluginUnloader *unloader = new BagetPluginUnloader(loader);
+            unloader->connect(baget, SIGNAL(destroyed()), SLOT(deleteLater()));
+        }
+    } else {
+        qDebug() << "Baget creation failed.";
+        qWarning() << token.mLibrary << "- provider not found";
+        loader->unload();
+        delete loader;
+    }
+
+    return baget;
+}
+
+/*!
+    \class BagetFactory
+    \brief Finds and creates baget widgets.
+
+    Baget factory creates an instance of a Baget
+    based on a BagetToken that is given to it.
+ */
+
+/*!
+    Constructs a new BagetFactory with \a pluginDirectory and \a parent.
+ */
+BagetFactory::BagetFactory(const QString& pluginDirectory, QObject *parent) :
+    QObject(parent), m_d(new BagetFactoryPrivate(pluginDirectory, this))
+{
+}
+
+/*!
+    Destructs the class.
+ */
+BagetFactory::~BagetFactory()
+{
+    delete m_d;
+}
+
+/*!
+    Creates and returns a Baget based on the given token.
+    \param token Identifies the Baget to be created.
+    \return The created Baget.
+ */
+Baget* BagetFactory::createBaget(const BagetToken &token)
+{
+    return m_d->createBaget(token);
+}