Class CPersistentStore

CPersistentStore

Support

Supported from 5.0

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 CPersistentStore Persistent store abstract base class CStreamStore Provides the core abstract framework for stores allowing streams to be created and manipulated

Defined in CPersistentStore:
CPersistentStore(), DoSetRootL(), Root(), SetRootL()

Inherited from CBase:
operator new()

Inherited from CStreamStore:
Commit(), CommitL(), CompactL(), Delete(), DeleteL(), DoCommitL(), DoCompactL(), DoCreateL(), DoDeleteL(), DoReadL(), DoReclaimL(), DoReplaceL(), DoRevertL(), DoWriteL(), ExtendL(), ReclaimL(), Revert(), RevertL()

See also:

• CFileStore

protected: CPersistentStore();

Description

Protected constructor. Prevents objects of this type being constructed.

TStreamId Root() const;

Description

Returns the stream id of the root stream.

Return value

TStreamId The id of the root stream.

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: virtual void DoSetRootL(TStreamId anId);

Description

Implements the setting of theroot stream.

This function is called by SetRootL()

Parameters

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

See also:

• CPersistentStore::SetRootL()