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Frequently Asked Questions – Persistence LibraryLibrary-specific Questions
Ordering Questions
General Questions
Library-specific QuestionsDo I need the Persistence Library?Most applications need persistence. They store domain objects in a file or database and access them in later runs. The Persistence Library transparently folds database activity into your application, allowing you to concentrate on the business logic.
You can benefit from the Persistence Library if you
For more detailed information, check out the package summary and tutorial.
How large is the library?The library is approximately 85 kilobytes.
How does it work?The library uses proxy objects. When you add an object to the database, you are returned a wrapper object that implements the same interfaces as the original object. This wrapper intercepts all method invocations and uses a method’s read-only status to determine if the receiver changes. If it does, the database is automatically updated.
How does it differ from other database libraries?Most other database libraries act as a front end to an existing
SQL database, and you must construct accessory XML files that state that member
variable
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