====== JDO ======

===== Java Data Objects =====

JDO est un standard informatique basé sur Java permettant l'accès aux données de façon transparente et unifiée.

JDO is a standard way to access persistent data in databases, using plain old Java objects ([[/glossaire/POJO|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, [[/glossaire/JDOQL|Java Data Objects Query Langage (JDOQL)]]
    * Transaction: the component responsible for initiating and completing transactions

Voir:
  * [[wpfr>Java_Data_Objects]], [[wp>Java_Data_Objects]]
  * [[/glossaire/JDOQL|Java Data Objects Query Langage (JDOQL)]], [[/glossaire/JPA|Java Persistence API (JPA)]], [[/glossaire/JPA|Java Persistence API (JPA)]]
  * EclipseLink, Enterprise JavaBeans (EJB), Hibernate, OpenJPA, TopLink, DataNucleus