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CDirectFileStore Class Reference

class CDirectFileStore : public CFileStore

Direct file store.

A direct file store implements a subset of the operations defined by the store abstract framework. Direct file stores allow streams to be created and objects externalised to them however once the streams have been committed and closed, they cannot subsequently be changed, i.e. streams cannot be replaced, deleted, extended or changed in any way.

Inherits from

CDirectFileStore
- CFileStore
  - CPersistentStore
    - CStreamStore
      - CBase

Public Member Functions
	CDirectFileStore ( RFile &)
	CDirectFileStore ( RFileBuf &, const TUidType &)
CDirectFileStore *	CreateL ( RFs &, const TDesC &, TUint )
CDirectFileStore *	CreateLC ( RFs &, const TDesC &, TUint )
CDirectFileStore *	FromL ( RFile &)
CDirectFileStore *	FromLC ( RFile &)
IMPORT_C TUid	Layout ()
CDirectFileStore *	NewL ( RFile &)
CDirectFileStore *	NewLC ( RFile &)
CDirectFileStore *	OpenL ( RFs &, const TDesC &, TUint )
CDirectFileStore *	OpenLC ( RFs &, const TDesC &, TUint )
CDirectFileStore *	ReplaceL ( RFs &, const TDesC &, TUint )
CDirectFileStore *	ReplaceLC ( RFs &, const TDesC &, TUint )
CDirectFileStore *	TempL ( RFs &, const TDesC &, TFileName &, TUint )
CDirectFileStore *	TempLC ( RFs &, const TDesC &, TFileName &, TUint )

Protected Member Functions
IMPORT_C MStreamBuf *	DoCreateL ( TStreamId &)
IMPORT_C MStreamBuf *	DoReadL ( TStreamId )

Private Member Functions
IMPORT_C CFileStore *	DoNewL ( RFile &)
IMPORT_C void	DoSetRootL ( TStreamId )
IMPORT_C void	ExternalizeL ( RWriteStream &)
IMPORT_C void	InternalizeL ( RReadStream &)

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()
	CFileStore::CFileStore(RFile &)
	CFileStore::CFileStore(RFileBuf &,const TUidType &)
	CFileStore::ChangedL()
	CFileStore::CreateL(RFs &,const TDesC &,TUint,TNewFunction)
	CFileStore::CreateLC(RFs &,const TDesC &,TUint,TNewFunction)
	CFileStore::Destruct()
	CFileStore::Detach()
	CFileStore::DoCommitL()
	CFileStore::DoRevertL()
	CFileStore::File()const
	CFileStore::FromL(RFile &,TFileStoreFactoryFunction)
	CFileStore::FromL(RFile &,const TFileStoreFactoryFunction)
	CFileStore::FromLC(RFile &,TFileStoreFactoryFunction)
	CFileStore::FromLC(RFile &,const TFileStoreFactoryFunction)
	CFileStore::Host()const
	CFileStore::IsHost(const MStreamBuf *)const
	CFileStore::MarshalL()
	CFileStore::NewL(RFile &,TNewFunction)
	CFileStore::NewLC(RFile &,TNewFunction)
	CFileStore::OpenL(RFs &,const TDesC &,TUint,TFileStoreFactoryFunction)
	CFileStore::OpenL(RFs &,const TDesC &,TUint,const TFileStoreFactoryFunction)
	CFileStore::OpenLC(RFs &,const TDesC &,TUint,TFileStoreFactoryFunction)
	CFileStore::OpenLC(RFs &,const TDesC &,TUint,const TFileStoreFactoryFunction)
	CFileStore::Reattach(RFile &)
	CFileStore::RefreshL()
	CFileStore::ReplaceL(RFs &,const TDesC &,TUint,TNewFunction)
	CFileStore::ReplaceLC(RFs &,const TDesC &,TUint,TNewFunction)
	CFileStore::Reset()
	CFileStore::Reset(TInt)
	CFileStore::SetSizeL(TInt)
	CFileStore::SetTypeL(const TUidType &)
	CFileStore::SynchL()
	CFileStore::TempL(RFs &,const TDesC &,TFileName &,TUint,TNewFunction)
	CFileStore::TempLC(RFs &,const TDesC &,TFileName &,TUint,TNewFunction)
	CFileStore::Type()const
	CFileStore::~CFileStore()
	CPersistentStore::CPersistentStore()
	CPersistentStore::Root()const
	CPersistentStore::SetRootL(TStreamId)
	CStreamStore::Commit()
	CStreamStore::CommitL()
	CStreamStore::CompactL()
	CStreamStore::Delete(TStreamId)
	CStreamStore::DeleteL(TStreamId)
	CStreamStore::ExtendL()
	CStreamStore::ReclaimL()
	CStreamStore::Revert()
	CStreamStore::RevertL()

Inherited Attributes
	CPersistentStore::iRoot

Constructor & Destructor Documentation

CDirectFileStore(RFile &)

IMPORT_C

CDirectFileStore

(

RFile &

aFile

)

Parameters

RFile & aFile

CDirectFileStore(RFileBuf &, const TUidType &)

IMPORT_C	CDirectFileStore	(	RFileBuf &	aBuf,
			const TUidType &	aType
		)

Parameters

RFileBuf & aBuf
const TUidType & aType

Member Functions Documentation

CreateL(RFs &, const TDesC &, TUint)

CDirectFileStore *	CreateL	(	RFs &	aFs,
			const TDesC &	aName,
			TUint	aFileMode
		)	[static, inline]

Creates a new file and constructs a new direct file store object to be associated with this file.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aName	The full path name of the new file. A file with this name must not already exist, otherwise the function leaves.
TUint aFileMode	The mode in which the file is to be accessed. The mode is defined by the TFileMode type.

CreateLC(RFs &, const TDesC &, TUint)

CDirectFileStore *	CreateLC	(	RFs &	aFs,
			const TDesC &	aName,
			TUint	aFileMode
		)	[static, inline]

Creates a new file and constructs a new direct file store object to be associated with this file, and places the pointer onto the cleanup stack.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aName	The full path name of the new file. A file with this name must not already exist, otherwise the function leaves.
TUint aFileMode	The mode in which the file is to be accessed. The mode is defined by the TFileMode type.

DoCreateL(TStreamId &)

IMPORT_C MStreamBuf *

DoCreateL

(

TStreamId &

anId

)

[protected, virtual]

Creates a new stream in the store. The function gets the allocated stream id in the anId parameter. A stream buffer for the stream should be returned, ready to write into the new stream. This provides the implementation for the RStoreWriteStream::CreateL() functions.

Parameters

TStreamId & anId

On return, contains the allocated stream id.

DoNewL(RFile &)

IMPORT_C CFileStore *

DoNewL

(

RFile &

aFile

)

[private, static]

Parameters

RFile & aFile

DoReadL(TStreamId)

IMPORT_C MStreamBuf *

DoReadL

(

TStreamId

anId

)

const [protected, virtual]

Opens the requested stream for reading. The function should return a stream buffer positioned at the beginning of this stream.

This function is called by the OpenL() and OpenLC() member functions of RStoreReadStream .

RStoreReadStream::OpenL() RStoreReadStream::OpenLC()

Parameters

TStreamId anId

The stream to be read.

DoSetRootL(TStreamId)

IMPORT_C void

DoSetRootL

(

TStreamId

anId

)

[private, virtual]

Parameters

TStreamId anId

ExternalizeL(RWriteStream &)

IMPORT_C void

ExternalizeL

(

RWriteStream &

aStream

)

const [private, virtual]

Parameters

RWriteStream & aStream

FromL(RFile &)

CDirectFileStore *

FromL

(

RFile &

aFile

)

[static, inline]

Constructs a direct file store object from an already opened file.

The file must already be open before calling this function.

Note that ownership of the file passes to the store. The referenced RFile is cleared and is no longer valid.

Parameters

RFile & aFile

A reference to the opened file.

FromLC(RFile &)

CDirectFileStore *

FromLC

(

RFile &

aFile

)

[static, inline]

Constructs a direct file store object from an already opened file, and places the pointer onto the cleanup stack.

The file must already be open before calling this function.

Note that ownership of the file passes to the store. The referenced RFile is cleared and is no longer valid.

Parameters

RFile & aFile

A reference to the opened file.

InternalizeL(RReadStream &)

IMPORT_C void

InternalizeL

(

RReadStream &

aStream

)

[private, virtual]

Parameters

RReadStream & aStream

Layout()

IMPORT_C TUid

Layout

(

)

const [virtual]

Gets the UID that uniquely identifies the specific type of this file store.

This function must be defined and implemented by classes derived from CFileStore . The direct file store, CDirectFileStore and the permanent file store, CPermanentFileStore both implement suitable functions.

KDirectFileStoreLayoutUid KPermanentFileStoreLayoutUid

NewL(RFile &)

CDirectFileStore *

NewL

(

RFile &

aFile

)

[static, inline]

Constructs a new direct file store object in an already opened file.

The file must already be open before calling the function. The existing content of the file is discarded.

Note that ownership of the file passes to the store. The referenced RFile is cleared and is no longer valid:

Parameters

RFile & aFile

A reference to the opened file.

NewLC(RFile &)

CDirectFileStore *

NewLC

(

RFile &

aFile

)

[static, inline]

Constructs a new direct file store object in an already opened file and places the pointer onto the cleanup stack.

The file must already be open before calling the function. The existing content of the file is discarded.

Note that ownership of the file passes to the store. The referenced RFile is cleared and is no longer valid:

Parameters

RFile & aFile

A reference to the opened file.

OpenL(RFs &, const TDesC &, TUint)

CDirectFileStore *	OpenL	(	RFs &	aFs,
			const TDesC &	aName,
			TUint	aFileMode
		)	[static, inline]

Opens a file containing a direct file store, and constructs a direct file store object.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aName	The full path name of the file containing the store.
TUint aFileMode	The mode in which the file is to be accessed. The mode is defined by the TFileMode type.

OpenLC(RFs &, const TDesC &, TUint)

CDirectFileStore *	OpenLC	(	RFs &	aFs,
			const TDesC &	aName,
			TUint	aFileMode
		)	[static, inline]

Opens a file containing a direct file store, constructs a direct file store object, and places the pointer onto the cleanup stack.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aName	The full path name of the file containing the store.
TUint aFileMode	The mode in which the file is to be accessed. The mode is defined by the TFileMode type.

ReplaceL(RFs &, const TDesC &, TUint)

CDirectFileStore *	ReplaceL	(	RFs &	aFs,
			const TDesC &	aName,
			TUint	aFileMode
		)	[static, inline]

Creates a file and constructs a direct file store object to be associated with it.

The file replaces any existing file of the same name.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aName	The full path name of the file to be replaced.
TUint aFileMode	The mode in which the file is to be accessed. The mode is defined by the TFileMode type.

ReplaceLC(RFs &, const TDesC &, TUint)

CDirectFileStore *	ReplaceLC	(	RFs &	aFs,
			const TDesC &	aName,
			TUint	aFileMode
		)	[static, inline]

Creates a file, constructs a direct file store object to be associated with it, and places the pointer onto the cleanup stack.

The file replaces any existing file of the same name.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aName	The full path name of the file to be replaced.
TUint aFileMode	The mode in which the file is to be accessed. The mode is defined by the TFileMode type.

TempL(RFs &, const TDesC &, TFileName &, TUint)

CDirectFileStore *	TempL	(	RFs &	aFs,
			const TDesC &	aPath,
			TFileName &	aName,
			TUint	aFileMode
		)	[static, inline]

Creates a temporary file and constructs a direct file store object to be associated with it.

The new file is created in the specified path and a unique file name is generated by the file server.

Note that the store framework does not delete a temporary file after it is closed.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aPath	The path where the new file is to be created.
TFileName & aName	On return, contains the full path name of the new file.
TUint aFileMode	The mode in which the new file is to be accessed. The mode is defined by the TFileMode type.

TempLC(RFs &, const TDesC &, TFileName &, TUint)

CDirectFileStore *	TempLC	(	RFs &	aFs,
			const TDesC &	aPath,
			TFileName &	aName,
			TUint	aFileMode
		)	[static, inline]

Creates a temporary file, constructs a direct file store object to be associated with it, and places the pointer onto the cleanup stack.

The new file is created in the specified path and a unique file name is generated by the file server.

Note that the store framework does not delete a temporary file after it is closed.

TFileMode

Parameters

RFs & aFs	Handle to a file server session.
const TDesC & aPath	The path where the new file is to be created.
TFileName & aName	On return, contains the full path name of the new file.
TUint aFileMode	The mode in which the new file is to be accessed. The mode is defined by the TFileMode type.