StdStorage Class Reference

StdStorage package is used to write and read persistent objects. These objects are read and written by a retrieval or storage algorithm (compatible with legacy Storage_Schema) in a container (disk, memory, network ...). Drivers (FSD_File objects) assign a physical container for data to be stored or retrieved. The standard procedure for an application in reading a container is to call one of the Read functions providing either a file path or a driver opened for reading. Thes function update the instance of the StdStorage_Data class which contains the data being read. The standard procedure for an application in writing a container is the following: More...

#include <StdStorage.hxx>

Static Public Member Functions
static TCollection_AsciiString	Version ()
	Returns the version of Storage's read/write routines.
static Storage_Error	Read (const TCollection_AsciiString &theFileName, Handle< StdStorage_Data > &theData)
	Returns the data read from a file located at theFileName. The storage format is compartible with legacy persistent one. These data are aggregated in a StdStorage_Data object which may be browsed in order to extract the root objects from the container. Note: - theData object will be created if it is null or cleared otherwise.
static Storage_Error	Read (const Handle< Storage_BaseDriver > &theDriver, Handle< StdStorage_Data > &theData)
	Returns the data read from the container defined by theDriver. The storage format is compartible with legacy persistent one. These data are aggregated in a StdStorage_Data object which may be browsed in order to extract the root objects from the container. Note: - theData object will be created if it is null or cleared otherwise.
static Storage_Error	Write (const Handle< Storage_BaseDriver > &theDriver, const Handle< StdStorage_Data > &theData)
	Writes the data aggregated in theData object into the container defined by theDriver. The storage format is compartible with legacy persistent one. Note: - theData may aggregate several root objects to be stored together.

Detailed Description

StdStorage package is used to write and read persistent objects. These objects are read and written by a retrieval or storage algorithm (compatible with legacy Storage_Schema) in a container (disk, memory, network ...). Drivers (FSD_File objects) assign a physical container for data to be stored or retrieved. The standard procedure for an application in reading a container is to call one of the Read functions providing either a file path or a driver opened for reading. Thes function update the instance of the StdStorage_Data class which contains the data being read. The standard procedure for an application in writing a container is the following:

• open the driver in writing mode,
• create an instance of the StdStorage_Data class, then add the persistent data to write with the function AddRoot,
• call the function Write from the storage, setting the driver and the Storage_Data instance as parameters,
• close the driver.

Member Function Documentation

Read() [1/2]

static Storage_Error StdStorage::Read ( const Handle< Storage_BaseDriver > & theDriver, Handle< StdStorage_Data > & theData )

static

Returns the data read from the container defined by theDriver. The storage format is compartible with legacy persistent one. These data are aggregated in a StdStorage_Data object which may be browsed in order to extract the root objects from the container. Note: - theData object will be created if it is null or cleared otherwise.

Read() [2/2]

static Storage_Error StdStorage::Read ( const TCollection_AsciiString & theFileName, Handle< StdStorage_Data > & theData )

static

Returns the data read from a file located at theFileName. The storage format is compartible with legacy persistent one. These data are aggregated in a StdStorage_Data object which may be browsed in order to extract the root objects from the container. Note: - theData object will be created if it is null or cleared otherwise.

Version()

static TCollection_AsciiString StdStorage::Version ( )

static

Returns the version of Storage's read/write routines.

Write()

static Storage_Error StdStorage::Write ( const Handle< Storage_BaseDriver > & theDriver, const Handle< StdStorage_Data > & theData )

static

Writes the data aggregated in theData object into the container defined by theDriver. The storage format is compartible with legacy persistent one. Note: - theData may aggregate several root objects to be stored together.

• createion date specified in the srorage header will be overwritten.

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

• StdStorage.hxx