About Object Database

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Manual
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Database Explorer

the approach of traditional visual database tools. Every row in the table represents a single object ... a single database object. This type of viewer is useful for viewing data of a simple object model. In ... . A Tree window displays objects as a tree. Every database object is represented by a tree node
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Retrieving JPA Entity Objects

The Java Persistence API (JPA) provides various ways to retrieve objects from the database ... of the database. The persistence context serves as a cache of retrieved entity objects. If a requested ... with data that is retrieved from the database (or from the L2 cache - if enabled). The new entity object
Manual
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Working with JPA Entity Objects [2011-04-18]

), which can represent physical objects in the database. Managing an ObjectDB Object Database using JPA ... database objects. Entity Object Life Cycle The life cycle of entity objects consists of four states ... the database. An entity object becomes Managed when it is persisted to the database
Manual
101

Working with JPA Entity Objects

), which can represent physical objects in the database. Managing an ObjectDB Object Database using JPA ... database objects. Entity Object Life Cycle The life cycle of entity objects consists of four states ... the database. An entity object becomes Managed when it is persisted to the database
Manual
101

CRUD Database Operations with JPA [2011-02-11]

Given an EntityManager, em, that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects The following code fragment stores 1,000 Point objects in the database: em.getTransaction().begin(); for (int i
Manual
101

CRUD Database Operations with JPA

Given an EntityManager, em, that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects The following code fragment stores 1,000 Point objects in the database: em.getTransaction().begin(); for (int i
Manual
101

Storing JPA Entity Objects

New entity objects can be stored in the database either explicitly by invoking the persist method ... and changes its state to Managed. The new entity object is stored in the database when the transaction ... of an entity class. Only instances of entity classes can be stored in the database independently. Objects
Manual
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Detached Entity Objects

Detached entity objects are objects in a special state in which they are not managed by any EntityManager but still represent objects in the database. Compared to managed entity objects, detached ... the database unless modified detached objects are merged back into an EntityManager to become managed
Manual
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Deleting JPA Entity Objects

Existing entity objects can be deleted from the database either explicitly by invoking the remove ... (); The entity object is physically deleted from the database when the transaction is committed. Embedded ... of that object from the database. DELETE Queries DELETE queries provide an alternative way for removing
Manual
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Database Management Settings

ObjectDB evaluation restrictions (of 10 entity classes and 1,000,000 entity objects per database) requires ... The <database> configuration element specifies back end (database engine) settings ... <database> element: <database>