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of these annotations. They are useful only for classes that are also used with an ORM JPA provider ... . Inverse fields are essential for collection fields when using ORM JPA implementations, but not ... per entity class hierarchy is sufficient because subclasses inherit the version field. Unlike ORM

only in a mapping XML file, such as orm .xml ; there is no equivalent annotation: This mapping file must be in the default location, META-INF/ orm .xml , or in a location specified in your persistence

is defined in the entity class. Some ORM JPA providers require a version field. You can disable

XML element in the XML mapping file: The mapping file must be in the default location, META-INF/ orm

org.springframework. orm .jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:427) org ... .jpa.EMF.createEntityManager(EMF.java:173) org.springframework. orm .jpa.JpaTransactionManager.createEntityManagerForTransaction(JpaTransactionManager.java:445) org.springframework. orm .jpa

;          mil/navy/navo/arf/config/ orm .xml     ... ;          The entities are mapped in the ORM .xml file correctly, as

.springframework. orm .jpa.JpaSystemException: com.objectdb.o.UserException: Mismatch client-server protocol prefix ... . orm .jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517) at org.springframework

] DEBUG o.s. orm .jpa.JpaTransactionManager - Should roll back transaction but cannot - no transaction available 2011-07-05 06:40:34.847 ["http-bio-8080"-exec-3] DEBUG o.s. orm .jpa.JpaTransactionManager

have to write java module with JPA to retrieve entity and then using some kind of ORM or direct JDBC persist

, that with ORM (e.g. Hibernate, EclipseLink) collections are always implemented this way, i.e. a query

caused the issue as ObjectDB ignores this ORM annotation. So the cause might be more complicated

library may be persisted, if defined as entity classes (e.g. in an orm .xml file) support Support

) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework. orm .jpa

.objectdb.JEnhancerAgent.transform(JEnhancerAgent.java:152) at org.springframework. orm .jpa.persistenceunit

Hi In objectdb site i found : Note: This ORM /SQL annotation is silently ignored by ObjectDB so i want  join tow table and generate a third table. Ex:  table 1: employee    table 2: address  and the generate table will be table 3: emp_add employee: e_id, e_name address: add

and objectdb file. Deepak_1996 Deepak Kumar Maharana ORM annotations, including @Column  are  

.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework. orm .jpa

) String name; } }   pezi Peter Sauer @UniqueConstraint is an ORM annotation. It references RDBMS

.invoke ( Method.java:497 ) org.springframework. orm .jpa.ExtendedEntityManagerCreator

and eliminates the need for another dependency to an ORM , such as Hibernate, since it implements the JPA ... to avoid coupling it to a specific database. By adding ObjectDB as a database and ORM in a project

When using JDO without annotations, database sequences are normally defined in the ORM file. Following discussion on the forum I was told that ObjectDB supports sequences if specified in the JDO file. Unfortunately, it doesn't seem to be supported consistently. It appears to work only in