5.4.4. ORM Layer
Object-Relational Mapping is the technology for linking relational database tables to programming language objects.
- Benefits of using ORM
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Enables working with a relational DBMS by means of Java objects manipulation.
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Simplifies programming by eliminating routine writing of SQL queries.
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Simplifies programming by letting you load and save entire object graphs with one command.
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Ensures easy porting of the application to different DBMS.
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Enables use of a concise object query language – JPQL.
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- Shortcomings
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Requires understanding of how ORM works.
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Makes direct optimization of SQL and use of the DBMS specifics difficult.
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CUBA uses the ORM implementation based on the EclipseLink framework.