IRsPersistDeltaStream Struct Reference

Inherits IRsPersistStream.

List of all members.

Public Member Functions
HRESULT	SaveDelta ([in] IStream *pStm,[in] IRsObject *pObj,[in] RtBOOL fClearDirty)
HRESULT	LoadDelta ([in] IRsObject *pObj,[in] IStream *pStm,[in] RtObjFileHeaderInfo *pObjFileHeaderInfo)

---

Detailed Description

Purpose of the interface is to allow Node’s data storing/restoring when the system is shutting down/starting. The IRsPersistDeltaStream extend the IRsPersistStream interface with ability to serialize only the object's difference.

See also:

IRsPersistStream

---

Member Function Documentation

HRESULT IRsPersistDeltaStream::SaveDelta	(	[in] IStream *	pStm,
		[in] IRsObject *	pObj,
		[in] RtBOOL	fClearDirty
	)

Called to serialize object that implement this interface as difference from the pObj.

Parameters:

	pStm	[in] Specify stream to which the difference will be written.
	pObj	[in] Object from which the difference stream will be written.
	fClearDirty	[in] Indicates whether to clear the dirty flag after the save is complete. If TRUE, the flag should be cleared. If FALSE, the flag should be left unchanged.

Remarks:

SaveDelta shouldn't write longer stream than IRsPersistStream::Save method If it is not possible, return S_FALSE and IRsPersistStream.Save method will be called instead.

HRESULT IRsPersistDeltaStream::LoadDelta	(	[in] IRsObject *	pObj,
		[in] IStream *	pStm,
		[in] RtObjFileHeaderInfo *	pObjFileHeaderInfo
	)

Called to get stream that describe difference between object that implement this interface and the pObj.

Parameters:

	pObj	[in] .
	pStm	[in] .
	pObjFileHeaderInfo	[in] .