1 /*

     2 * Copyright (c) 2006 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 

    19 

    20 #ifndef _C_GLXDATASOURCETASKMDEATTRIBUTETASK_H_

    21 #define _C_GLXDATASOURCETASKMDEATTRIBUTETASK_H_

    22 

    23 /**

    24  * @author Simon Brooks, Alex Birkett

    25  */

    26 

    27 #include <e32std.h>

    28 #include "glxdatasourcetaskmde.h"

    29 

    30 

    31 // CLASS DECLARATION

    32 

    33 class CGlxGetRequest;    

    34 

    35 NONSHARABLE_CLASS(TGlxQueryAttribute)

    36     {

    37 public:

    38     TGlxQueryAttribute(

    39         TMPXAttribute aAttribute,

    40         CMPXMedia* aMedia,

    41         TGlxFilterProperties aFilterProperties

    42         ) : 

    43         iAttribute(aAttribute),

    44         iMedia(aMedia),

    45         iFilterProperties(aFilterProperties)

    46             {

    47             

    48             };

    49 public:

    50     TMPXAttribute iAttribute;

    51     CMPXMedia* iMedia;

    52     TGlxFilterProperties iFilterProperties;

    53     };

    54 

    55 /**

    56  * Attribute retrieval task.

    57  */

    58 NONSHARABLE_CLASS(CGlxDataSourceTaskMdeAttribute) : public CGlxDataSourceTaskMde

    59 	{

    60 public:

    61     /**

    62      * Constructor.

    63      * @param aRequest request to be executed.

    64      * @param aObserver observer to be informed when task has completed.

    65      * @param aDataSource data source to be used by this object.

    66      */

    67 	CGlxDataSourceTaskMdeAttribute(CGlxGetRequest* aRequest, MGlxDataSourceRequestObserver& aObserver, CGlxDataSource* aDataSource);

    68 	

    69     /**

    70      * Destructor.

    71      */

    72     ~CGlxDataSourceTaskMdeAttribute();

    73 	

    74 private: // From CGlxDataSourceTask     

    75     /**

    76      * See @ref CGlxDataSourceTask::ExecuteRequestL

    77      */ 

    78     void ExecuteRequestL();

    79 	

    80 private: // From CGlxDataSourceTaskMde

    81     /**

    82      * See @ref CGlxDataSourceTaskMde::DoHandleQueryCompletedL

    83      */ 

    84     void DoHandleQueryCompletedL(CMdEQuery& aQuery);

    85 

    86     /**

    87      * See @ref CGlxDataSourceTaskMde::DoNextQueryL

    88      */ 

    89     void DoNextQueryL();

    90     

    91 private:	

    92 

    93 	void AddAttributesL(CMdEObject& aObject, CMPXMedia* aEntry);

    94 

    95 	void AddCollectionAttributesL(CMPXMedia* aEntry);

    96 	

    97 	void AddContainerAttributesL(CMPXMedia* aEntry, CMdEObject* aContainer, CGlxDataSource::TContainerType aType);

    98 	

    99 	void AddItemAttributesL(CMPXMedia* aEntry, CMdEObject* aItem, CGlxDataSource::TItemType aType);

   100 	

   101     /**

   102      * Add location information to a media object from MDS.

   103      * @param aLocationId the id of a location object.

   104      * @param aMedia media object to add a location attribute to.

   105      */

   106     void AddLocationAttributeToMediaL(CMPXMedia& aMedia, const TItemId& aLocationId);

   107         

   108 

   109     void DoHandleAttributeQueryCompletedL();

   110     

   111     /**

   112 	 * Handles the completion of a query of type ELocationQuery.

   113 	 */

   114 	void DoHandleLocationQueryCompletedL();

   115 	

   116 

   117 	void DoHandleImageVideoQueryCompletedL();

   118 		

   119     /**

   120      * Creates a location query and adds it to the queue of queries.

   121      */

   122     void QueueLocaitonQueryL();

   123 

   124     /**

   125      * @param aObjectDef object definition which defines objects which will be queried

   126      * @param aIsContent If ETrue, the definition of the objects being queried is set by the item type filter property, if EFalse, the definition

   127      * of the object being queried is provided by the aObjectDef parameter

   128      *  

   129      */

   130     void QueueObjectQueryL(CMdEObjectDef& aObjectDef, TBool aIsContent, TGlxQueryType aQueryType, TQueryResultMode aResultMode, 

   131                           const TGlxMediaId& aContainerId, TMPXAttribute aAttribute, CMPXMedia* aEntry, 

   132                           const TGlxFilterProperties& aFilterProperties);

   133     

   134 

   135 	void DoHandleAttributeResponseCompleteL();

   136 

   137 	

   138     /**

   139      * Determines if the request contains the KGlxMediaGeneralLocation attribtue.

   140      * @return ETrue if the the KGlxMediaGeneralLocation attribute is requrested else EFalse

   141      */

   142     TBool LocationAttributeRequested();

   143     

   144     /**

   145      * Executes the next query in the queue of queries.

   146      */

   147     void ExecuteQueryL(); 

   148 

   149 private:

   150     /**

   151      * Results media array (owned)

   152      */

   153     CMPXMediaArray* iMediaArray;

   154     

   155     /**

   156      * Attributes associated with outstanding queries

   157      */

   158     RArray< TGlxQueryAttribute > iQueryAttributes;

   159 	};

   160 

   161 

   162 #endif // _C_GLXDATASOURCETASKMDEATTRIBUTETASK_H_