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apache-jdo - Apache JDO
- Description:
Java Data Objects (JDO) is a standard way to access persistent
data in databases, using plain old Java objects (POJO) to
represent persistent data. The approach separates data
manipulation (done by accessing Java data members in the Java
domain objects) from database manipulation (done by calling
the JDO interface methods). This separation of concerns leads
to a high degree of independence of the Java view of data from
the database view of the data.
Interfaces are defined for the user's view of persistence:
PersistenceManager: the component responsible for the life cycle
of persistent instances, Query factory, and Transaction access
Query: the component responsible for querying the datastore and
returning persistent instances or values
Transaction: the component responsible for initiating and
completing transactions
Commercial and open source implementations of JDO are available
for relational databases, object databases, and file systems.
JDO is being developed as a Java Specification Request in the
Java Community Process. The original JDO 1.0 is JSR-12 and the
current JDO 2.0 is JSR-243.
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