C# Class GSF.Historian.Files.ArchiveFileAllocationTable

Represents the File Allocation Table of an ArchiveFile.

Inheritance: ISupportBinaryImage

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Private Properties

Property	Type	Description
ArchiveFileAllocationTable	System
RequestDataBlock	ArchiveDataBlock

Public Methods

Method	Description
Extend ( ) : void	Extends the ArchiveFile by one ArchiveDataBlock.
Extend ( int dataBlocksToAdd ) : void	Extends the ArchiveFile by the specified number of ArchiveDataBlocks.
FindDataBlock ( int historianID, bool preRead = true ) : ArchiveDataBlock	Returns the first ArchiveDataBlock in the ArchiveFile for the specified historianID.
FindDataBlocks ( int historianID, TimeTag startTime, TimeTag endTime, bool preRead = true ) : List	Returns all ArchiveDataBlocks in the ArchiveFile for the specified historianID with ArchiveDataPoints between the specified startTime and endTime.
FindDataBlocks ( int historianID, TimeTag startTime, bool preRead = true ) : List	Returns all ArchiveDataBlocks in the ArchiveFile for the specified historianID with ArchiveDataPoint points later than the specified startTime.
FindDataBlocks ( int historianID, bool preRead = true ) : List	Returns all ArchiveDataBlocks in the ArchiveFile for the specified historianID.
FindLastDataBlock ( int historianID, bool preRead = true ) : ArchiveDataBlock	Returns the last ArchiveDataBlock in the ArchiveFile for the specified historianID.
GenerateBinaryImage ( byte buffer, int startIndex ) : int	Generates binary image of the ArchiveFileAllocationTable and copies it into the given buffer, for BinaryLength bytes.
ParseBinaryImage ( byte buffer, int startIndex, int length ) : int	Initializes object by parsing the specified buffer containing a binary image. This method is never used since constructor parses the point allocation table.
Save ( bool forceFlush = false ) : void	Saves the ArchiveFileAllocationTable data to the ArchiveFile.

Private Methods

Method	Description
ArchiveFileAllocationTable ( ArchiveFile parent ) : System	Initializes a new instance of the ArchiveFileAllocationTable class.
RequestDataBlock ( int historianID, TimeTag dataTime, int blockIndex ) : ArchiveDataBlock	Returns an ArchiveDataBlock for writing ArchiveDataPoints for the specified historianID.

Method Details

Extend() public method

Extends the ArchiveFile by one ArchiveDataBlock.

public Extend ( ) : void
return	void

Extend() public method

Extends the ArchiveFile by the specified number of ArchiveDataBlocks.

public Extend ( int dataBlocksToAdd ) : void
dataBlocksToAdd	int	Number of s to add to the .
return	void

FindDataBlock() public method

Returns the first ArchiveDataBlock in the ArchiveFile for the specified historianID.

public FindDataBlock ( int historianID, bool preRead = true ) : ArchiveDataBlock
historianID	int	Historian identifier whose is to be retrieved.
preRead	bool	true to pre-read data to locate write cursor.
return	ArchiveDataBlock

FindDataBlocks() public method

Returns all ArchiveDataBlocks in the ArchiveFile for the specified historianID with ArchiveDataPoints between the specified startTime and endTime.

public FindDataBlocks ( int historianID, TimeTag startTime, TimeTag endTime, bool preRead = true ) : List
historianID	int	Historian identifier.
startTime	TimeTag	Start .
endTime	TimeTag	End .
preRead	bool	true to pre-read data to locate write cursor.
return	List

FindDataBlocks() public method

Returns all ArchiveDataBlocks in the ArchiveFile for the specified historianID with ArchiveDataPoint points later than the specified startTime.

public FindDataBlocks ( int historianID, TimeTag startTime, bool preRead = true ) : List
historianID	int	Historian identifier.
startTime	TimeTag	Start .
preRead	bool	true to pre-read data to locate write cursor.
return	List

FindDataBlocks() public method

Returns all ArchiveDataBlocks in the ArchiveFile for the specified historianID.

public FindDataBlocks ( int historianID, bool preRead = true ) : List
historianID	int	Historian identifier.
preRead	bool	true to pre-read data to locate write cursor.
return	List

FindLastDataBlock() public method

Returns the last ArchiveDataBlock in the ArchiveFile for the specified historianID.

public FindLastDataBlock ( int historianID, bool preRead = true ) : ArchiveDataBlock
historianID	int	Historian identifier.
preRead	bool	true to pre-read data to locate write cursor.
return	ArchiveDataBlock

GenerateBinaryImage() public method

Generates binary image of the ArchiveFileAllocationTable and copies it into the given buffer, for BinaryLength bytes.

is null. /// or is less than 0 -or- /// and will exceed length. ///

public GenerateBinaryImage ( byte buffer, int startIndex ) : int
buffer	byte	Buffer used to hold generated binary image of the source object.
startIndex	int	0-based starting index in the to start writing.
return	int

ParseBinaryImage() public method

Initializes object by parsing the specified buffer containing a binary image.

This method is never used since constructor parses the point allocation table.

public ParseBinaryImage ( byte buffer, int startIndex, int length ) : int
buffer	byte	Buffer containing binary image to parse.
startIndex	int	0-based starting index in the to start parsing.
length	int	Valid number of bytes within to read from .
return	int

Save() public method

Saves the ArchiveFileAllocationTable data to the ArchiveFile.

public Save ( bool forceFlush = false ) : void
forceFlush	bool	Forces an immediate disk flush for save.
return	void