casacore::HDF5File Class Reference

A class representing an HDF5 file. More...

#include <HDF5File.h>

Inheritance diagram for casacore::HDF5File:

Public Member Functions
	HDF5File (const String &name, ByteIO::OpenOption=ByteIO::Old)
	Create an HDF5 file object with the given file name (possible tilde or environment variables in it will be expanded). More...
	~HDF5File ()
	The destructor closes the file and deletes it when it was opened using ByteIO::Scratch or ByteIO::Delete. More...
void	reopenRW ()
	Reopen the underlying file for read/write access. More...
Bool	isWritable () const
	Is the file writable? More...
Bool	isOpenedForDelete () const
	Is the file opened for delete? More...
Bool	isClosed () const
	Is the file temporarily closed? More...
virtual void	close ()
	Close the file (temporarily). More...
void	reopen ()
	Reopen the file if closed (which may change the HID). More...
void	flush ()
	Flush the data to disk. More...
size_t	getChunkCacheSize () const
	Get or set the chunk cache size (in bytes). More...
void	setChunkCacheSize (size_t nbytes)
Public Member Functions inherited from casacore::HDF5Object
	HDF5Object ()
	Default constructor sets to invalid hid. More...
virtual	~HDF5Object ()
	The destructor in a derived class should close the hid appropriately. More...
bool	isValid () const
	Is it a valid hid? More...
hid_t	getHid () const
	Get the hid. More...
	operator hid_t () const
	Convert automatically to hid_t. More...
void	setName (const String &name)
	Get or set the name. More...
const String &	getName () const

Static Public Member Functions
static Bool	isHDF5 (const String &name)
	Test if the file with the given name is an HDF5 file. More...
Static Public Member Functions inherited from casacore::HDF5Object
static Bool	hasHDF5Support ()
	Check if there is HDF5 support compiled in. More...
static void	throwNoHDF5 ()
	If no HDF5, throw an exception that HDF5 is not supported. More...

Private Member Functions
void	doOpen ()
	Open or create the file. More...
	HDF5File (const HDF5File &that)
	Copy constructor cannot be used. More...
HDF5File &	operator= (const HDF5File &that)
	Assignment cannot be used. More...

Private Attributes
ByteIO::OpenOption	itsOption
String	itsName
Bool	itsDelete

Additional Inherited Members
Protected Member Functions inherited from casacore::HDF5Object
void	setHid (hid_t hid)
	Set the hid. More...
void	clearHid ()
	Clear the hid (set to invalid). More...

Detailed Description

A class representing an HDF5 file.

Intended use:

Public interface

Review Status

Test programs:

tHDF5File

Prerequisite

• HDF5 system

Synopsis

This class wraps the HDF5 functions to open, create, or close an HDF5 file. If the file is opened as readonly, it is possible to reopen it for read/write (provided the user has the correct privileges). It is also possible to temporarily close the file and reopen it later.
Note: It is ensured that the class and the static function isHDF5 are also defined if HDF5 is not compiled in;

Motivation

It was overkill to use the HDF5 C++ interface. Instead little wrappers have been written. HDF5File can be embedded in a shared pointer making it possible to share an HDF5 file amongst various HDF5Array objects.

Definition at line 68 of file HDF5File.h.

Constructor & Destructor Documentation

casacore::HDF5File::HDF5File ( const String &  name, ByteIO::OpenOption  = ByteIO::Old  )

explicit

Create an HDF5 file object with the given file name (possible tilde or environment variables in it will be expanded).

The ByteIO option determines if the file will be created, opened for input and/or output, or possibly deleted by the destructor.

casacore::HDF5File::~HDF5File

(

)

The destructor closes the file and deletes it when it was opened using ByteIO::Scratch or ByteIO::Delete.

casacore::HDF5File::HDF5File ( const HDF5File &  that )

private

Copy constructor cannot be used.

Member Function Documentation

virtual void casacore::HDF5File::close ( )

virtual

Close the file (temporarily).

Note it will not delete the file; that is only done by the destructor.

Implements casacore::HDF5Object.

void casacore::HDF5File::doOpen ( )

private

Open or create the file.

void casacore::HDF5File::flush

(

)

Flush the data to disk.

size_t casacore::HDF5File::getChunkCacheSize

(

)

const

Get or set the chunk cache size (in bytes).

Note that all data sets in a file share the cache.

Bool casacore::HDF5File::isClosed ( ) const

inline

Is the file temporarily closed?

Definition at line 100 of file HDF5File.h.

References casacore::HDF5Object::getHid().

static Bool casacore::HDF5File::isHDF5 ( const String &  name )

static

Test if the file with the given name is an HDF5 file.

Bool casacore::HDF5File::isOpenedForDelete ( ) const

inline

Is the file opened for delete?

Definition at line 96 of file HDF5File.h.

References itsDelete.

Bool casacore::HDF5File::isWritable ( ) const

inline

Is the file writable?

Definition at line 92 of file HDF5File.h.

References itsOption, and casacore::ByteIO::Update.

HDF5File& casacore::HDF5File::operator= ( const HDF5File &  that )

private

Assignment cannot be used.

void casacore::HDF5File::reopen

(

)

Reopen the file if closed (which may change the HID).

void casacore::HDF5File::reopenRW

(

)

Reopen the underlying file for read/write access.

Nothing will be done if the stream is writable already. Otherwise it will be reopened and an exception will be thrown if it is not possible to reopen it for read/write access.

void casacore::HDF5File::setChunkCacheSize

(

size_t

nbytes

)

Member Data Documentation

Bool casacore::HDF5File::itsDelete

private

Definition at line 128 of file HDF5File.h.

Referenced by isOpenedForDelete().

String casacore::HDF5File::itsName

private

Definition at line 127 of file HDF5File.h.

ByteIO::OpenOption casacore::HDF5File::itsOption

private

Definition at line 126 of file HDF5File.h.

Referenced by isWritable().

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The documentation for this class was generated from the following file:

• casa/casacore/casa/HDF5/HDF5File.h