Class CPersistentStore

class CPersistentStore : public CStreamStore;

Description

Persistent store abstract base class. It provides the behaviour for setting and retrieving the root stream id.

Before closing a persistent store, the root stream id must be set. After opening a persistent store, the first thing done is to look up the root stream id. The root stream can then be opened and data read from the store.

Derivation

• CBase - Base class for all classes to be instantiated on the heap.

• CStreamStore - ...

• CPersistentStore - ...

Members

Defined in CPersistentStore:

• CPersistentStore()
• DoSetRootL(TStreamId)Implements the setting of theroot stream.
• Root()constReturns the stream id of the root stream.
• SetRootL(TStreamId)Sets the specified stream as the root stream.
• iRoot

Inherited from CBase:

• Delete(CBase *)Deletes the specified object.
• Extension_(TUint,TAny *&,TAny *)Extension function
• operator new(TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TAny *)Initialises the object to binary zeroes.
• operator new(TUint,TLeave)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TLeave,TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TUint)Allocates the object from the heap and then initialises its contents to binary z...

Inherited from CStreamStore:

• Commit()Commits changes.
• CommitL()Commit changes and leaves if unsuccessful.
• CompactL()Compacts the store. This returns free space to the appropriate system pool, for ...
• Delete(TStreamId)Deletes the specified stream from this store.
• DeleteL(TStreamId)Deletes the specified stream from this store, leaving if unsuccessful.
• ExtendL()Generates a new stream within this store, and returns its id. This function can ...
• ReclaimL()Reclaims space within a store, returning the total amount of free space availabl...
• Revert()Rolls back the store to its state at the last commit point.
• RevertL()Rolls back the store to its state at the last commit point and leaves if unsucce...

protected: inline CPersistentStore();

Description

inline TStreamId Root() const;

Description

Returns the stream id of the root stream.

Return value

TStreamId The id of the root stream.

inline void SetRootL(TStreamId anId);

Description

Sets the specified stream as the root stream.

Parameters

TStreamId anId The id of the stream which is to be the root stream of this store.

private: IMPORT_C virtual void DoSetRootL(TStreamId anId);

Description

Implements the setting of theroot stream.

This function is called by CPersistentStore::SetRootL(TStreamId)

Parameters

TStreamId anId The id of the stream which is to be the root stream of the store.

See also:

• CPersistentStore::SetRootL(TStreamId)Sets the specified stream as the root stream.

protected: TStreamId iRoot;

Description