Persistent data interface for an object oriented programming system
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United States of America Patent
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Sep 21, 1993
Issued Date -
N/A
app pub date -
Jan 6, 1993
filing date -
Oct 23, 1989
priority date (Note) -
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Abstract
A persistent data interface for an object oriented programming system provides a persistent class object. Any object which must survive a run time session is arranged to inherit from the persistent class object. Any object which inherits from the persistent class automatically becomes a persistent object. The persistent class includes a 'materialize' method for automatically retrieving a persistent object from nonvolatile memory and placing it in volatile memory if the persistent object cannot be located in volatile memory. A 'dematerialize' method is also included for removing an object from volatile memory and storing it in nonvolatile memory. Data integrity of the system is thereby preserved.
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