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JPA Doc
254

JPA Annotations for Access Modes

Persistence fields can either be accessed by JPA directly (as fields) or indirectly (as properties and get/set methods). JPA 2 provides an annotation and an enum for setting the access mode: More details are provided in chapter 2 of the ObjectDB manual.
FAQ
200

Can I use ObjectDB to access a relational database?

To access relational databases using the Java Persistence API (JPA) you will need an Object Relational Mapping (ORM) tool, such as Hibernate, TopLink, EclipseLink, Open JPA or DataNucleus ... standalone Object Database Management System (ODBMS) and not an ORM tool, so it is not intended and cannot be used to access other database management systems.
Manual
81

JPA Entity Fields

query is executed eagerly when the entity object is first accessed. Version Field ObjectDB ... object versions and make their values accessible to your application by marking the version fields ... is explicitly defined. Property Access When an entity is being stored to the database data is extracted from
Manual
79

Server User List

The configuration element lists the users that are allowed to access the ObjectDB Server ... " ip="127.0.0.1" admin="true">
JPA Doc
61

javax.persistence.Access

javax.persistence Annotation Access Target: Classes and fields (including property get methods) Used to specify an access type to be applied to an entity class, mapped superclass, or embeddable class ... ) Specification of field- or property-based access. (Required) Specification of field- or property-based access. Since: JPA 2.0
JPA Doc
60

Access.value

Annotation Element javax.persistence. Access AccessType value (Required) Specification of field- or property-based access. Since: JPA 2.0
Manual
22

Retrieving JPA Entity Objects

and the persistent fields are initialized, lazily, when the entity object is first accessed ... accessed. The getReference method is useful when a reference to an entity object is required but not ... the primary key is set but other persistent fields are uninitialized until the object fields are accessed
Issue
21

NullPointer when accessing entity field

(ObjectCacheDBBucketManager.java:194) It is very strange that the problem occurs when accessing field of enhanced class ...   The cause of this exception is unclear. It happened during an access operation that required reloading ... during the operation. This could happen when an object is accessed in one thread while the EntityManager
Issue
20

NullPointer when accessing persistent field

dependencies )   The code being called is accessing a map declared as follows; @OneToMany(cascade ... on accessing an inverse collection in an entity that has been garbage collected. Build 2.3.2_01 fixes ... (RemoteTestRunner.java:197)   As before a Map structure was being accessed. @OneToMany(cascade
Forum
20

Recommendation - concurrent access multiple class v

that it might get corrupted because the manual says that we must not access ObjectDB with different versions ... , then finally all of them get the new version? So...basically...concurrent access with version x and version x ... servers usually do not have a direct access to your classes, so this is not a problem. But if you have 5