Helper class for tiled access to an array in a file. More...

#include <TiledFileHelper.h>

Inheritance diagram for casacore::TiledFileHelper:

Public Member Functions
	TiledFileHelper (const String &fileName, const IPosition &shape, DataType dtype, const TSMOption &, Bool writable, Bool bigEndian)
	Create a TiledFileHelper object. More...

	~TiledFileHelper ()

virtual const TableDesc &	getDesc () const
	Get the table description needed for the hypercolumn description. More...

TSMFile *	file ()

virtual String	dataManagerType () const
	Return the class name. More...

virtual DataManager *	clone () const
	These functions are pure virtual, but not needed here. More...

virtual Bool	flush (AipsIO &, Bool)
	Flush and optionally fsync the data. More...

virtual void	create (uInt)
	Let the data manager initialize itself for a new table. More...

virtual TSMCube *	getHypercube (uInt)

virtual TSMCube *	getHypercube (uInt, IPosition &)
	Get the hypercube in which the given row is stored. More...

virtual void	readHeader (uInt, Bool)
	Let a derived class read the header info. More...

Public Member Functions inherited from casacore::TiledStMan
	TiledStMan ()
	Create a TiledStMan. More...

	TiledStMan (const String &hypercolumnName, uInt maximumCacheSizeMiB)
	Create a TiledStMan storage manager. More...

virtual	~TiledStMan ()

virtual String	dataManagerName () const
	Get the name given to the storage manager. More...

void	setDataManagerName (const String &newHypercolumnName)

virtual Record	dataManagerSpec () const
	Return a record containing data manager specifications. More...

virtual Record	getProperties () const
	Get data manager properties that can be modified. More...

virtual void	setProperties (const Record &spec)
	Modify data manager properties. More...

void	setDataChanged ()
	Set the flag to "data has changed since last flush". More...

virtual void	setMaximumCacheSize (uInt nMiB)
	Set the maximum cache size (in MiB) in a non-persistent way. More...

uInt	maximumCacheSize () const
	Get the current maximum cache size (in MiB (MibiByte)). More...

uInt	cacheSize (uInt rownr) const
	Get the current cache size (in buckets) for the hypercube in the given row. More...

const IPosition &	hypercubeShape (uInt rownr) const
	Get the hypercube shape of the data in the given row. More...

const IPosition &	tileShape (uInt rownr) const
	Get the tile shape of the data in the given row. More...

uInt	bucketSize (uInt rownr) const
	Get the bucket size (in bytes) of the hypercube in the given row. More...

virtual Bool	canChangeShape () const
	Can the tiled storage manager handle changing array shapes? The default is no (but TiledCellStMan can). More...

virtual Bool	canAccessColumn (Bool &reask) const
	Can the tiled storage manager access an entire column. More...

virtual Bool	hasMultiFileSupport () const
	The data manager supports use of MultiFile. More...

uInt	calcCacheSize (uInt rownr, const IPosition &sliceShape, const IPosition &windowStart, const IPosition &windowLength, const IPosition &axisPath) const
	Calculate the cache size (in buckets) for accessing the hypercube containing the given row. More...

void	setCacheSize (uInt rownr, const IPosition &sliceShape, const IPosition &windowStart, const IPosition &windowLength, const IPosition &axisPath, Bool forceSmaller)
	Set the cache size using the `calcCacheSize` function mentioned above. More...

void	setCacheSize (uInt rownr, uInt nbuckets, Bool forceSmaller)
	Set the cache size for accessing the hypercube containing the given row. More...

void	setHypercubeCacheSize (uInt hypercube, uInt nbuckets, Bool forceSmaller)
	Sets the cache size using the hypercube instead of the row number. More...

Bool	userSetCache (uInt rownr) const
	Determine if the user set the cache size (using setCacheSize). More...

void	emptyCaches ()
	Empty the caches used by the hypercubes in this storage manager. More...

void	showCacheStatistics (ostream &os) const
	Show the statistics of all caches used. More...

uInt	getLengthOffset (uInt nrPixels, Block< uInt > &dataOffset, Block< uInt > &localOffset, uInt &localTileLength) const
	Get the length of the data for the given number of pixels. More...

uInt	nrCoordVector () const
	Get the number of coordinate vectors. More...

uInt	nrow () const
	Get the nr of rows in this storage manager. More...

Bool	canAddRow () const
	Does the storage manager allow to add rows? (yes) More...

virtual IPosition	defaultTileShape () const
	Get the default tile shape. More...

uInt	nhypercubes () const
	Return the number of hypercubes. More...

virtual TSMCube *	singleHypercube ()
	Test if only one hypercube is used by this storage manager. More...

const TSMCube *	getTSMCube (uInt hypercube) const
	Get the given hypercube. More...

TSMCube *	getTSMCube (uInt hypercube)

const TSMCube *	getHypercube (uInt rownr) const
	Get the hypercube in which the given row is stored. More...

TSMCube *	makeTSMCube (TSMFile *file, const IPosition &cubeShape, const IPosition &tileShape, const Record &values, Int64 fileOffset=-1)
	Make the correct TSMCube type (depending on tsmOption()). More...

void	readTile (char local, const Block< uInt > &localOffset, const char external, const Block< uInt > &externalOffset, uInt nrpixels)
	Read a tile and convert the data to local format. More...

void	writeTile (char external, const Block< uInt > &externalOffset, const char local, const Block< uInt > &localOffset, uInt nrpixels)
	Write a tile after converting the data to external format. More...

TSMFile *	getFile (uInt sequenceNumber)
	Get the TSMFile object with the given sequence number. More...

virtual void	open (uInt nrrow, AipsIO &)
	Open the storage manager for an existing table. More...

virtual void	resync (uInt nrrow)
	Resync the storage manager with the new file contents. More...

virtual void	reopenRW ()
	Reopen all files used in this storage manager for read/write access. More...

virtual void	deleteManager ()
	The data manager will be deleted (because all its columns are requested to be deleted). More...

DataManagerColumn *	makeScalarColumn (const String &name, int dataType, const String &dataTypeID)
	Create a column in the storage manager on behalf of a table column. More...

DataManagerColumn *	makeDirArrColumn (const String &name, int dataType, const String &dataTypeID)
	Create a direct array column. More...

DataManagerColumn *	makeIndArrColumn (const String &name, int dataType, const String &dataTypeID)
	Create an indirect array column. More...

Bool	canReallocateColumns () const
	The TiledStMan wants to do reallocateColumn. More...

DataManagerColumn *	reallocateColumn (DataManagerColumn *column)
	Reallocate the column object if it is part of this data manager. More...

virtual void	setShape (uInt rownr, TSMCube *hypercube, const IPosition &shape, const IPosition &tileShape)
	Set the shape and tile shape of a hypercube. More...

void	checkCubeShape (const TSMCube *hypercube, const IPosition &cubeShape) const
	Check the shape to be set for a hypercube. More...

int	coordinateDataType (const String &columnName) const
	Get the data type of the coordinate column with the given name. More...

void	initCoordinates (TSMCube *hypercube)
	Initialize the new coordinates for the given cube. More...

const TSMDataColumn *	getDataColumn (uInt colnr) const
	Get pointer to data column object. More...

Public Member Functions inherited from casacore::DataManager
	DataManager ()
	Default constructor. More...

virtual	~DataManager ()

void	dataManagerInfo (Record &info) const
	Add SEQNR and SPEC (the DataManagerSpec subrecord) to the info. More...

virtual Bool	isStorageManager () const
	Is the data manager a storage manager? The default is yes. More...

uInt	sequenceNr () const
	Get the (unique) sequence nr of this data manager. More...

uInt	ncolumn () const
	Get the nr of columns in this data manager (can be zero). More...

Bool	asBigEndian () const
	Have the data to be stored in big or little endian canonical format? More...

const TSMOption &	tsmOption () const
	Get the TSM option. More...

MultiFileBase *	multiFile ()
	Get the MultiFile pointer (can be 0). More...

String	keywordName (const String &keyword) const
	Compose a keyword name from the given keyword appended with the sequence number (e.g. More...

String	fileName () const
	Compose a unique filename from the table name and sequence number. More...

ByteIO::OpenOption	fileOption () const
	Get the AipsIO option of the underlying file. More...

virtual Bool	isRegular () const
	Is this a regular storage manager? It is regular if it allows addition of rows and writing data in them. More...

Table &	table () const
	Get the table this object is associated with. More...

virtual Bool	canRemoveRow () const
	Does the data manager allow to delete rows? (default no) More...

virtual Bool	canAddColumn () const
	Does the data manager allow to add columns? (default no) More...

virtual Bool	canRemoveColumn () const
	Does the data manager allow to delete columns? (default no) More...

virtual Bool	canRenameColumn () const
	Does the data manager allow to rename columns? (default yes) More...

virtual void	showCacheStatistics (std::ostream &) const
	Show the data manager's IO statistics. More...

DataManagerColumn *	createScalarColumn (const String &columnName, int dataType, const String &dataTypeId)
	Create a column in the data manager on behalf of a table column. More...

DataManagerColumn *	createDirArrColumn (const String &columnName, int dataType, const String &dataTypeId)
	Create a direct array column. More...

DataManagerColumn *	createIndArrColumn (const String &columnName, int dataType, const String &dataTypeId)
	Create an indirect array column. More...

DataManager *	getClone () const
	Has the object already been cloned? More...

void	setClone (DataManager *clone) const
	Set the pointer to the clone. More...

Private Member Functions
	TiledFileHelper (const TiledFileHelper &)
	Forbid copy constructor and assignment. More...

TiledFileHelper &	operator= (const TiledFileHelper &)

Private Attributes
TableDesc	itsDesc

Additional Inherited Members
Static Public Member Functions inherited from casacore::TiledStMan
static IPosition	makeTileShape (const IPosition &hypercubeShape, Double tolerance=0.5, uInt maxNrPixelsPerTile=32768)
	Derive the tile shape from the hypercube shape for the given number of pixels per tile. More...

static IPosition	makeTileShape (const IPosition &hypercubeShape, const Vector< double > &weight, const Vector< double > &tolerance, uInt maxNrPixelsPerTile=32768)

Static Public Member Functions inherited from casacore::DataManager
static void	registerCtor (const String &type, DataManagerCtor func)
	Register a mapping of a data manager type to its static construction function. More...

static DataManagerCtor	getCtor (const String &dataManagerType)
	Get the "constructor" of a data manager (thread-safe). More...

static Bool	isRegistered (const String &dataManagerType)
	Test if a data manager is registered (thread-safe). More...

static DataManager *	unknownDataManager (const String &dataManagerType, const Record &spec)
	Serve as default function for theirRegisterMap, which catches all unknown data manager types. More...

Protected Member Functions inherited from casacore::TiledStMan
void	setPersMaxCacheSize (uInt nMiB)
	Set the persistent maximum cache size (in MiB). More...

uInt	getBindings (const Vector< String > &columnNames, PtrBlock< TSMColumn * > &colSet, Bool mustExist) const
	Get the bindings of the columns with the given names. More...

virtual void	setupCheck (const TableDesc &tableDesc, const Vector< String > &dataNames) const
	Function setup calls this function to allow the derived class to check specific information. More...

void	checkValues (const PtrBlock< TSMColumn * > &colSet, const Record &values) const
	Check if values are given in the record for all columns in the block. More...

void	checkCoordinates (const PtrBlock< TSMColumn * > &coordColSet, const IPosition &cubeShape, const Record &values) const
	Check if the coordinate values are correct. More...

void	checkShapeColumn (const IPosition &shape) const
	Check if the shapes of FixedShape data and coordinate columns match. More...

void	checkCoordinatesShapes (const TSMCube *hypercube, const IPosition &cubeShape) const
	Check if the cube shape matches that of defined coordinates. More...

void	checkAddHypercube (const IPosition &cubeShape, const Record &values) const
	Check if the hypercube to be added is correctly defined. More...

TSMCube *	makeHypercube (const IPosition &cubeShape, const IPosition &tileShape, const Record &values)
	Make a new TSMCube object. More...

Int	getCubeIndex (const Record &idValues) const
	Get the index of the hypercube with the given id-values. More...

uInt	addedNrrow (const IPosition &shape, uInt incrInLastDim) const
	Determine how many rows need to be added for an extension (in the last dimension) of a hypercube with the given shape. More...

Bool	flushCaches (Bool fsync)
	Flush the caches of all hypercubes. More...

AipsIO *	headerFileCreate ()
	Create the TSM header file. More...

AipsIO *	headerFileOpen ()
	Open the TSM header file. More...

void	headerFilePut (AipsIO &headerFile, uInt nrCube)
	Write the data into the header file. More...

void	headerFileGet (AipsIO &headerFile, uInt tabNrrow, Bool firstTime, Int extraNdim)
	Read the data from the header file. More...

void	headerFileClose (AipsIO *headerFile)
	Close the header file. More...

void	setup (Int extraNdim=-1)
	Set up the TiledStMan variables from the table description. More...

void	createFile (uInt index)
	Create a TSMFile object and store its pointer at the given index in the block. More...

int	arrayDataType (int dataType) const
	Convert the scalar data type to an array data type. More...

Protected Member Functions inherited from casacore::DataManager
void	decrementNcolumn ()
	Decrement number of columns (in case a column is deleted). More...

void	setEndian (Bool bigEndian)
	Tell the data manager if big or little endian format is needed. More...

void	setTsmOption (const TSMOption &tsmOption)
	Tell the data manager which TSM option to use. More...

void	setMultiFile (MultiFileBase *mfile)
	Tell the data manager that MultiFile can be used. More...

void	throwDataTypeOther (const String &columnName, int dataType) const
	Throw an exception in case data type is TpOther, because the storage managers (and maybe other data managers) do not support such columns. More...

Protected Attributes inherited from casacore::TiledStMan
String	hypercolumnName_p
	The name of the hypercolumn. More...

uInt	nrrow_p
	The number of rows in the columns. More...

PtrBlock< TSMColumn * >	colSet_p
	The assembly of all columns. More...

PtrBlock< TSMDataColumn * >	dataCols_p
	The assembly of all data columns. More...

PtrBlock< TSMColumn * >	dataColSet_p

PtrBlock< TSMColumn * >	idColSet_p
	The assembly of all id columns. More...

PtrBlock< TSMColumn * >	coordColSet_p
	The assembly of all coordinate columns. More...

PtrBlock< TSMFile * >	fileSet_p
	The assembly of all TSMFile objects. More...

PtrBlock< TSMCube * >	cubeSet_p
	The assembly of all TSMCube objects. More...

uInt	persMaxCacheSize_p
	The persistent maximum cache size (in MiB) for a hypercube. More...

uInt	maxCacheSize_p
	The actual maximum cache size for a hypercube (in MiB). More...

uInt	nrdim_p
	The dimensionality of the hypercolumn. More...

uInt	nrCoordVector_p
	The number of vector coordinates. More...

IPosition	fixedCellShape_p
	The fixed cell shape. More...

Bool	dataChanged_p
	Has any data changed since the last flush? More...

Detailed Description

Helper class for tiled access to an array in a file.

Intended use:

Internal

Review Status

Test programs:: tTiledFileAccess

Prerequisite

Description of Tiled Storage Manager in module file Tables.h

Synopsis

TiledFileHelper is a helper class for class TiledFileAccess. It sets up a table description containing one array column to make it possible to use the tiled storage manager to access an array in an arbitrary file.

Motivation

This class was created to be able to read an image in a FITS file.

Definition at line 73 of file TiledFileHelper.h.

Constructor & Destructor Documentation

casacore::TiledFileHelper::TiledFileHelper	(	const String &	fileName,
		const IPosition &	shape,
		DataType	dtype,
		const TSMOption &	,
		Bool	writable,
		Bool	bigEndian
	)

Create a TiledFileHelper object.

Tell if the data is stored in big or little endian canonical format.

casacore::TiledFileHelper::~TiledFileHelper ( )

casacore::TiledFileHelper::TiledFileHelper ( const TiledFileHelper & )

private

Forbid copy constructor and assignment.

Member Function Documentation

virtual DataManager* casacore::TiledFileHelper::clone ( ) const

virtual

These functions are pure virtual, but not needed here.

They throw an exception.

Implements casacore::DataManager.

virtual void casacore::TiledFileHelper::create ( uInt nrrow )

virtual

Let the data manager initialize itself for a new table.

Implements casacore::DataManager.

virtual String casacore::TiledFileHelper::dataManagerType ( ) const

virtual

Return the class name.

Implements casacore::DataManager.

TSMFile* casacore::TiledFileHelper::file ( )

inline

Definition at line 86 of file TiledFileHelper.h.

References casacore::TiledStMan::fileSet_p.

virtual Bool casacore::TiledFileHelper::flush	(	AipsIO &	ios,
		Bool	fsync
	)

virtual

Flush and optionally fsync the data.

The AipsIO stream represents the main table file and can be used by virtual column engines to store SMALL amounts of data. It returns a True status if it had to flush (i.e. if data have changed).

Implements casacore::DataManager.

virtual const TableDesc& casacore::TiledFileHelper::getDesc ( ) const

virtual

Get the table description needed for the hypercolumn description.

Reimplemented from casacore::TiledStMan.

virtual TSMCube* casacore::TiledFileHelper::getHypercube ( uInt )

virtual

Implements casacore::TiledStMan.