emailservices/nmclientapi/src/nmapidatapluginfactory.cpp
author hgs
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permissions -rw-r--r--
201029
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/*
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 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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 * All rights reserved.
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 * This component and the accompanying materials are made available
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 * under the terms of "Eclipse Public License v1.0"
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 * which accompanies this distribution, and is available
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 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
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 *
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 * Initial Contributors:
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 * Nokia Corporation - initial contribution.
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 *
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 * Contributors:
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 *
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 * Description:
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 *
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 */
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#include "nmapiheaders.h"
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/*!
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 \class NmApiDataPluginFactory
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 \brief The NmApiDataPluginFactory class creates NmDataPlugin instance.
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 */
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NmApiDataPluginFactory *NmApiDataPluginFactory::mInstance = NULL;
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int NmApiDataPluginFactory::mReferenceCount = 0;
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QObject *NmApiDataPluginFactory::mPlugin = NULL;
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QPluginLoader *NmApiDataPluginFactory::mPluginLoader = NULL;
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/*!
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 */
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NmApiDataPluginFactory::NmApiDataPluginFactory()
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{
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    NM_FUNCTION;
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}
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/*!
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 */
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NmApiDataPluginFactory::~NmApiDataPluginFactory()
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{
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    NM_FUNCTION;
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    if (mPlugin) {
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        delete mPlugin;
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        mPlugin = NULL;
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    }
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    if(mPluginLoader){
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        delete mPluginLoader;
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        mPluginLoader = NULL;
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    }
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}
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/*!
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 */
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NmApiDataPluginFactory *NmApiDataPluginFactory::instance()
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{
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    NM_FUNCTION;
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    if (!mInstance) {
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        mInstance = new NmApiDataPluginFactory();
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    }
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    mReferenceCount++;
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    return mInstance;
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}
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/*!
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 */
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void NmApiDataPluginFactory::releaseInstance(NmApiDataPluginFactory *&instance)
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{
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    NM_FUNCTION;
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    //can't have passed out instances if we don't have any
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    if (mInstance) {
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        if (instance == mInstance) {
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            instance = NULL;
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            mReferenceCount--;
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        }
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        if (0 >= mReferenceCount) {
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            delete mInstance;
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            mInstance = NULL;
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        }
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    }
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}
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/*!
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 */
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NmDataPluginInterface *NmApiDataPluginFactory::interfaceInstance()
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{
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    NM_FUNCTION;
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    if (!mPlugin) {
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        mPlugin = loadPlugin();
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    }
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    return qobject_cast<NmDataPluginInterface*> (mPlugin);
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}
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/*!
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 */
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QObject *NmApiDataPluginFactory::loadPlugin()
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{
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    NM_FUNCTION;
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    if (!mPluginLoader) {
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        const QString KPluginDirectory = "c:\\resource\\plugins";
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        QDir pluginDir = QDir(KPluginDirectory);
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        const QString KFrameworkPluginName = "nmframeworkadapter.qtplugin";
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        /*!
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         This creates plugin entity.
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         */
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        mPluginLoader = new QPluginLoader(pluginDir.absoluteFilePath(KFrameworkPluginName));
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        mPlugin = mPluginLoader->instance();
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        if(!mPlugin){
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            // We don't have proper plugin instance, so we don't need it's loader.
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            delete mPluginLoader;
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            mPluginLoader = NULL;
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        }
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    }
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    return mPlugin;
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}
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QObject *NmApiDataPluginFactory::plugin()
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{
43
hgs
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    NM_FUNCTION;
hgs
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    if (!mPlugin) {
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        mPlugin = loadPlugin();
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    }
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    return mPlugin;
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   140
}