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:
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#include <StdStorage.hxx>
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.
◆ Read() [1/2]
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.
◆ Read() [2/2]
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.
◆ Version()
Returns the version of Storage's read/write routines.
◆ Write()
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.
The documentation for this class was generated from the following file:
