author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 00:20:15 +0200 | |
changeset 6 | aba6b8104af3 |
parent 0 | ba25891c3a9e |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 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: Contains CNcdNodeDbManager class |
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* |
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*/ |
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#ifndef NCD_NODE_DB_MANAGER_H |
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#define NCD_NODE_DB_MANAGER_H |
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#include <e32base.h> |
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#include <f32file.h> |
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#include <e32cmn.h> |
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#include <bamdesca.h> |
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#include "ncdstoragedataitem.h" |
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#include "ncdnodeclassids.h" |
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#include "ncddatabaseitems.h" |
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class MNcdStorageManager; |
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class MNcdStorage; |
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class CNcdNodeIdentifier; |
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/** |
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* CNodeDbManager provides functions manage |
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* node db information. Functions to read, write and remove |
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* data are provided. |
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*/ |
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class CNcdNodeDbManager : public CBase |
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{ |
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public: |
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/** |
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* NewL |
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* |
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* @return CNcdNodeDbManager* Pointer to the created object |
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* of this class. |
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*/ |
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static CNcdNodeDbManager* NewL( |
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MNcdStorageManager& aStorageManager ); |
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/** |
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* NewLC |
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* |
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* @return CNcdNodeDbManager* Pointer to the created object |
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* of this class. |
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*/ |
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static CNcdNodeDbManager* NewLC( |
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MNcdStorageManager& aStorageManager ); |
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/** |
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* Destructor |
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* |
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* Deletes the nodes from the node cache. |
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*/ |
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virtual ~CNcdNodeDbManager(); |
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public: // Node db manager configuration functions |
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/** |
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* Adds the given identifier to the list of nodes that are never removed from DB. |
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* |
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* @param aIdentifier The node identifier. |
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*/ |
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void AddDoNotRemoveNodeIdentifierL( const CNcdNodeIdentifier& aNodeIdentifier ); |
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/** |
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* Adds the given identifiers to the list of nodes that are never removed from DB. |
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* |
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* @param aIdentifiers The node identifiers. |
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*/ |
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void AddDoNotRemoveNodeIdentifiersL( |
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const RPointerArray<CNcdNodeIdentifier>& aNodeIdentifiers ); |
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/** |
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* Removes the given identifier from the list of nodes that are never removed from DB. |
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* |
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* @param aIdentifier The node identifier. |
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*/ |
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void RemoveDoNotRemoveNodeIdentifier( const CNcdNodeIdentifier& aNodeIdentifier ); |
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public: // Database info functions |
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/** |
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* @param aClientUid The uid of the client whose storage is |
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* examined. |
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* @param aSkipNamespaces The sizes of these namespaces are ignored when |
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* the total size is calculated. Ownership is not transferred. |
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* @return TInt the size in bytes of the whole storage |
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* of the specified client. |
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*/ |
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TInt StorageSizeL( const TUid& aClientUid, |
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const MDesCArray& aSkipNamespaces ); |
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|
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|
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public: // Database read functions |
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|
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/** |
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* Reads binary data from the database |
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* @param aIdentifier Contains id information that is |
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* used to read right info from db. |
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* @param aClassType Type of the data. |
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* @return HBufC8* Data from db. |
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*/ |
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HBufC8* ReadDataFromDatabaseL( |
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const CNcdNodeIdentifier& aIdentifier, |
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const NcdNodeClassIds::TNcdNodeClassType aClassType ); |
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|
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/** |
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* @see CNcdNodeDbManager::ReadDataFromDatabaseL |
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*/ |
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HBufC8* ReadDataFromDatabaseLC( |
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const CNcdNodeIdentifier& aIdentifier, |
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const NcdNodeClassIds::TNcdNodeClassType aClassType ); |
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|
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|
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/** |
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* This function is used to start the database action |
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* that will get the data for some object from the |
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* storage database. |
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* After the data has been found from the storage, |
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* InternalizeL function of the given data item is called. |
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* |
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* @param aIdentifier Contains id information that is |
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* used to read right info from db. |
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* @param aDataItem InternalizeL of this object is called |
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* when the data is read from db. |
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* @param aClassType Type of the data. |
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*/ |
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void StartStorageLoadActionL( |
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const CNcdNodeIdentifier& aIdentifier, |
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MNcdStorageDataItem& aDataItem, |
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const NcdNodeClassIds::TNcdNodeClassType aClassType ); |
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|
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|
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/** |
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* This function will return the array about the identifiers found from |
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* the database. Parameters provide ways to limit what identifiers |
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* should be included in return array. |
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* |
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* @note Identifiers are included into the array only once. So, if |
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* multiple db items with different types are having same identifier, |
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* the identifier will be added to target array only once. |
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* |
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* @param RPointerArray<CNcdNodeIdentifier> Array that will contain |
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* identifiers of the database items. Ownership of the identifiers |
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* are transmitted for the user of the array. |
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* @param aClientUid Identifies the client whose data is searched. |
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* @param aSkipNamespaces This array contains the namespaces whose |
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* data should not be returned. |
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* @param aAcceptClassType This array contains the class types that |
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* are accepted for the items. The items of the class types |
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* that are not included in this array will not be included into |
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* the return array. |
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*/ |
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void GetAllClientItemIdentifiersL( |
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RPointerArray<CNcdNodeIdentifier>& aItemIdentifiers, |
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const TUid& aClientUid, |
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const MDesCArray& aSkipNamespaces, |
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const RArray<NcdNodeClassIds::TNcdNodeClassType>& aAcceptClassTypes ); |
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|
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|
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public: // Database write functions |
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|
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/** |
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* This function is used to start the database action |
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* that will save the data of the data item into the db. |
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* The ExternalizeL function of the data item is called. |
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* So, the item may insert its data into the given stream. |
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* |
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* @param aIdentifier Contains id information that is |
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* used to read right info from db. |
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* @param aDataItem ExternalizeL of this object is called |
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* when the data is written into db. |
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* @param aClassType Type of the data. |
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*/ |
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void SaveDataIntoDatabaseL( |
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const CNcdNodeIdentifier& aIdentifier, |
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MNcdStorageDataItem& aDataItem, |
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const NcdNodeClassIds::TNcdNodeClassType aClassType ); |
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|
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|
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public: // Database remove functions |
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|
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/** |
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* Removes certain data row from the db table according |
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* to the given values that are used as the key values. |
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* |
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* @param aIdentifier The identifier that contains key values. |
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* @param aClassType The class type tells the general type of the data |
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* that should be removed. |
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*/ |
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void RemoveDataFromDatabaseL( |
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const CNcdNodeIdentifier& aIdentifier, |
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const NcdNodeClassIds::TNcdNodeClassType aClassType ); |
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/** |
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* Removes certain data rows from the db table according |
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* to the given values that are used as the key values. |
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* This works like the function above, but commits the |
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* removal operation rarely. This should speed |
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* up the removal process. |
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* |
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* @see CNcdNodeDbManager::RemoveDataFromDatabaseL |
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* |
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* @param aIdentifiers The identifier array that contains key values. |
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* Ownership is not tranferred. |
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* @param aClassTypes The class type array tells the general types of the data |
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* that should be removed. Ownership is not transferred. |
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*/ |
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void RemoveDataFromDatabaseL( |
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const RPointerArray<CNcdNodeIdentifier>& aIdentifiers, |
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const RArray<NcdNodeClassIds::TNcdNodeClassType>& aClassTypes, |
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TBool aCompact = ETrue ); |
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/** |
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* Removes everything except identifiers that are in the do not remove list |
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* |
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* @param aNodeIdentifier Used to get the correct storage |
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*/ |
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void RemoveDataFromDatabaseL( |
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const CNcdNodeIdentifier& aNodeIdentifier, |
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const RArray<RNcdDatabaseItems>& aDoNotRemoveItems ); |
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/** |
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* Clears client's storage |
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* |
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* @note All of client's files and databases are |
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* deleted except the ones that are having namespaces |
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* defined in the skip array. |
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* |
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* @param aClientUid Client's uid identifier |
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* @param aSkipNamespaces Array contains the descriptors of |
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* namespaces that should not be cleared. Ownership is not |
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* transferred. |
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*/ |
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void ClearClientL( const TUid& aClientUid, |
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const MDesCArray& aSkipNamespaces ); |
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protected: |
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/** |
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* Constructor |
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*/ |
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CNcdNodeDbManager( MNcdStorageManager& aStorageManager ); |
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/** |
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* ConstructL |
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*/ |
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virtual void ConstructL(); |
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/** |
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* Returns an old storage or creates a new one if necessary. |
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* Storage will contain the information of the certain client |
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* that has been identifier by its UID. |
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* |
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* @param aIdentifier Identifies what storage is wanted. |
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* @return MNcdStorage& Storage matching the identifier info. |
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* @exception KErrArgument if aIdentifier contains empty fields. |
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* In other error situations, system wide error code. |
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*/ |
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MNcdStorage& StorageL( const CNcdNodeIdentifier& aIdentifier ) const; |
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TInt RemoveDataFromNamespaceL( |
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const RPointerArray<CNcdNodeIdentifier>& aDoNotRemoveIds, |
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TInt aIndex, |
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TInt aEnd ); |
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private: |
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// Prevent if not implemented |
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CNcdNodeDbManager( const CNcdNodeDbManager& aObject ); |
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CNcdNodeDbManager& operator =( const CNcdNodeDbManager& aObject ); |
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private: // data |
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// Storage manager is used to load and to save data from |
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// databases. |
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MNcdStorageManager& iStorageManager; |
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}; |
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#endif // NCD_NODE_DB_MANAGER_H |