Persistent storage classes

The class inheritance relationships for the Persistent storage subsystem are shown in the Figure 25.


Following is a brief description of each class:

TDiskDictionary provides persistent storage for key-value instance pairs. Keys are stored using a default index manager. Values are stored and then retrieved, based on their associated keys, using an instance of class TRecordManager.

TDiskDictionaryIterator provides an iterator to step through the items stored in an instance of TDiskDictionary.

TDiskSet provides persistent storage for a set of small objects. Objects are stored using a default index manager.

TDiskSetIterator provides an iterator to step through the objects stored in an instance of TDiskSet.

TRecordManager provides the ability to read and write values to a dictionary.


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