1 /*

     2  * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  *

    12  * Contributors:

    13  *

    14  * Description:

    15  *

    16  */

    17 

    18 #include "nmapiheaders.h"

    19 

    20 

    21 

    22 /*!

    23  \class NmApiDataPluginFactory

    24  \brief The NmApiDataPluginFactory class creates NmDataPlugin instance.

    25 

    26  */

    27 NmApiDataPluginFactory *NmApiDataPluginFactory::mInstance = NULL;

    28 int NmApiDataPluginFactory::mReferenceCount = 0;

    29 QObject *NmApiDataPluginFactory::mPlugin = NULL;

    30 QPluginLoader *NmApiDataPluginFactory::mPluginLoader = NULL;

    31 

    32 /*!

    33 

    34  */

    35 NmApiDataPluginFactory::NmApiDataPluginFactory()

    36 {

    37     NM_FUNCTION;

    38 }

    39 

    40 /*!

    41 

    42  */

    43 NmApiDataPluginFactory::~NmApiDataPluginFactory()

    44 {

    45     NM_FUNCTION;

    46     

    47     if (mPlugin) {

    48         delete mPlugin;

    49         mPlugin = NULL;

    50     }

    51     

    52     if(mPluginLoader){

    53         delete mPluginLoader;

    54         mPluginLoader = NULL;

    55     }

    56 }

    57 

    58 /*!

    59 

    60  */

    61 NmApiDataPluginFactory *NmApiDataPluginFactory::instance()

    62 {

    63     NM_FUNCTION;

    64     

    65     if (!mInstance) {

    66         mInstance = new NmApiDataPluginFactory();

    67     }

    68     mReferenceCount++;

    69     return mInstance;

    70 }

    71 

    72 /*!

    73 

    74  */

    75 void NmApiDataPluginFactory::releaseInstance(NmApiDataPluginFactory *&instance)

    76 {

    77     NM_FUNCTION;

    78     

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

    80     if (mInstance) {

    81         if (instance == mInstance) {

    82             instance = NULL;

    83             mReferenceCount--;

    84         }

    85         if (0 >= mReferenceCount) {

    86             delete mInstance;

    87             mInstance = NULL;

    88         }

    89     }

    90 }

    91 

    92 

    93 /*!

    94 

    95  */

    96 NmDataPluginInterface *NmApiDataPluginFactory::interfaceInstance()

    97 {

    98     NM_FUNCTION;

    99     

   100     if (!mPlugin) {

   101         mPlugin = loadPlugin();

   102     }

   103     return qobject_cast<NmDataPluginInterface*> (mPlugin);

   104 }

   105 

   106 /*!

   107 

   108  */

   109 QObject *NmApiDataPluginFactory::loadPlugin()

   110 {

   111     NM_FUNCTION;

   112     

   113     if (!mPluginLoader) {

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

   115         QDir pluginDir = QDir(KPluginDirectory);

   116         const QString KFrameworkPluginName = "nmframeworkadapter.qtplugin";

   117         /*!

   118          This creates plugin entity.

   119          */

   120         mPluginLoader = new QPluginLoader(pluginDir.absoluteFilePath(KFrameworkPluginName));

   121 

   122         mPlugin = mPluginLoader->instance();

   123         if(!mPlugin){

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

   125             delete mPluginLoader;

   126             mPluginLoader = NULL;

   127         }

   128     }

   129     return mPlugin;

   130 }

   131 

   132 QObject *NmApiDataPluginFactory::plugin()

   133 {

   134     NM_FUNCTION;

   135     

   136     if (!mPlugin) {

   137         mPlugin = loadPlugin();

   138     }

   139     return mPlugin;

   140 }