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examples/AppFramework/ssmanager/policies/sysstates/dummy_backup_statepolicy.h

00001 //
00002 // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
00003 // All rights reserved.
00004 // This component and the accompanying materials are made available
00005 // under the terms of "Eclipse Public License v1.0"
00006 // which accompanies this distribution, and is available
00007 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
00008 //
00009 // Initial Contributors:
00010 // Nokia Corporation - initial contribution.
00011 //
00012 // Contributors:
00013 //
00014 // Description: A dummy backup state policy is provided to demonstrate the system state
00015 // manager framework.
00016 //
00017 
00018 #ifndef _DUMMY_BACKUP_STATEPOLICY_H__
00019 #define _DUMMY_BACKUP_STATEPOLICY_H__
00020 
00021 #include <e32base.h>
00022 #include <f32file.h>
00023 
00024 #include <ssm/ssmstatepolicy.h>
00025 #include <ssm/ssmstate.h>
00026 #include <ssm/ssmconditionalcallback.h>
00027 #include <ssm/ssmstatetransition.h>
00028 
00029 // Forward declaration
00030 class CSsmCommandListResourceReader;
00031 
00038 NONSHARABLE_CLASS(CSsmDummyBackUpStatePolicy) : public CBase, public MSsmStatePolicy, public MSsmConditionalCallback
00039         {
00040 public:
00041         IMPORT_C static MSsmStatePolicy* NewL();
00042         
00043         //from MSsmStatePolicy
00044         void Initialize(TRequestStatus& aStatus);
00045         void InitializeCancel();
00046         void Release();
00047         TResponse TransitionAllowed(const TSsmStateTransition& aRequest, TSsmStateTransition const* aCurrent, TSsmStateTransition const* aQueued, const RMessagePtr2& aMessage);
00048         void PrepareCommandList(TSsmState aState, TInt aReason, TRequestStatus& aStatus);
00049         void PrepareCommandListCancel();
00050         CSsmCommandList* CommandList();
00051         TBool GetNextState(TSsmState aCurrentTransition, TInt aReason, TInt aError, TInt aSeverity, TSsmState& aNextState);
00052         
00053         //from MSsmConditionalCallback
00054         TBool ConditionalCommandAllowedL(CResourceFile& aResourceFile, TInt aResourceId);
00055         
00056 private:
00057         void ConstructL();
00058         //from CBase
00059         CSsmDummyBackUpStatePolicy();
00060         ~CSsmDummyBackUpStatePolicy();
00061         TBool TransitionSupported(const TSsmState& aRequestedState) const;
00062 private:
00063         RFs iFs;
00064         CSsmCommandListResourceReader* iCommandListResourceReader;
00065         RArray<TSsmState> iCurrentlySupportedTransitions;
00066         enum TBackupPanicCodes
00067                 {
00068                 EInvalidResourceReader // Panic code used when the command list resource reader is NULL
00069                 };
00070         };
00071 
00072 #endif  //_DUMMY_BACKUP_STATEPOLICY_H__
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