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casacore::HDF5File Class Reference

A class representing an HDF5 file. More...

#include <HDF5File.h>

Inheritance diagram for casacore::HDF5File:
casacore::HDF5Object

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 StringgetName () 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...
 
HDF5Fileoperator= (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

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().


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