/*

* 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:

*

*/

#include "nmuiengineheaders.h"

/*!

    \class NmDataPluginFactory

    \brief The NmDataPluginFactory class creates NmDataPlugin instance.

*/

NmDataPluginFactory *NmDataPluginFactory::mInstance;

int NmDataPluginFactory::mReferenceCount;

QList<QObject*> *NmDataPluginFactory::mPluginArray;

QList<QPluginLoader*> NmDataPluginFactory::mPluginLoaderArray;

static const quint32 TESTPLUGINID = 0x20026764;

static const int TESTPLUGININDEX = 0;

static const int INTERFACEPLUGININDEX = 1;

/*!

 */

NmDataPluginFactory::NmDataPluginFactory()

{

}

/*!

 */

NmDataPluginFactory::~NmDataPluginFactory()

{

    if (mPluginArray) {

        qDeleteAll(mPluginArray->begin(), mPluginArray->end());

        mPluginArray->clear();

        delete mPluginArray;

        mPluginArray = NULL;

    }

    qDeleteAll(mPluginLoaderArray.constBegin(), mPluginLoaderArray.constEnd());

    mPluginLoaderArray.clear();

}

/*!

 */

NmDataPluginFactory *NmDataPluginFactory::instance()

{

    if (!mInstance) {

        mInstance = new NmDataPluginFactory();

    }

    mReferenceCount++;

    return mInstance;

}

/*!

 */

void NmDataPluginFactory::releaseInstance(NmDataPluginFactory *&instance)

    {

    //can't have passed out instances if we don't have any

    if (mInstance) {

        if (instance == mInstance) {

            instance = NULL;

            mReferenceCount--;

        }

        if (0 >= mReferenceCount) {

            delete mInstance;

            mInstance = NULL;

            }

        }

    }

/*!

 */

NmDataPluginInterface *NmDataPluginFactory::interfaceInstance(QObject *plugin)

{

    NmDataPluginInterface *pluginInterface = NULL;

    if (plugin) {

        pluginInterface= qobject_cast<NmDataPluginInterface*>(plugin);

        }

    return pluginInterface;

}

/*!

 */

NmDataPluginInterface *NmDataPluginFactory::interfaceInstance(NmId mailboxId)

{

    return interfaceInstance(pluginInstance(mailboxId));

}

/*!

 */

QObject *NmDataPluginFactory::pluginInstance(NmId mailboxId)

{

    QObject *value(NULL);

    quint64 tmp = mailboxId.id();

    quint32 pluginId = tmp >> 32;

    if (pluginId == TESTPLUGINID || 

        pluginId == 0

#ifdef USE_POPIMAP_TESTPLUGIN

        || pluginId == POPTESTPLUGINID

        || pluginId == IMAPTESTPLUGINID

#endif        

        ) {

        //test plugin is always the first one

        value = pluginInstances()->at(TESTPLUGININDEX);

    }

    else {

        return pluginInstances()->at(INTERFACEPLUGININDEX);

    }

    return value;

}

/*!

 */

QList<QObject*> *NmDataPluginFactory::pluginInstances()

{

    //if plugins have not been already created, do it now.

    if (!mPluginArray) {

        mPluginArray = new QList<QObject*>();

    }

    if (mPluginArray->count() == 0) {

        //first, create testPlugin

#ifdef Q_OS_SYMBIAN

        const QString KTestPluginName = "nmtestplugin.qtplugin";

        const QString KPluginDirectory = "c:\\resource\\plugins";

        QDir pluginDir = QDir(KPluginDirectory);

#else

        const QString KTestPluginName = "nmtestplugin.dll";

        QDir pluginDir = QDir(QApplication::applicationDirPath());

#endif

        QObject *testPlugin = loadPlugin(pluginDir, KTestPluginName);

        mPluginArray->append(testPlugin);

        //then framework data plugin

#ifdef Q_OS_SYMBIAN

        const QString KFrameworkPluginName = "nmframeworkadapter.qtplugin";

        QObject *frameworkPlugin = loadPlugin(pluginDir, KFrameworkPluginName);

        mPluginArray->append(frameworkPlugin);

#endif

    }

    return mPluginArray;

}

/*!

 */

QObject *NmDataPluginFactory::loadPlugin(

    const QDir &pluginDir,

    const QString &pluginName )

{

    /*!

        This creates plugin entity.

     */

    QPluginLoader *loader = new QPluginLoader(pluginDir.absoluteFilePath(pluginName));

    QObject *pluginInstance = loader->instance();

    if (pluginInstance) {

        // Store QPluginLoader instances to keep plugins alive.

        // If QPluginLoader instance for a plugin is deleted, then there

        // is a risk that some component outside will load and unload

        // plugin, which will lead into situation where plugin is deleted.

        // This means that instance in mPluginArray will be invalid.

        mPluginLoaderArray.append(loader);

    } else {

        // We don't have proper plugin instance, so we don't need it's loader.

        delete loader;

        loader = NULL;

    }

    return pluginInstance;

}