About mapped

forum_thread

10 classes limit

hey. i am a student. and we are learnning inheritance in JPA for my assiment i have 1 base class and 20 subclass in some kind of hierarchy (with all kind of mappings: SINGLE_TABLE, TABLE_PER_CLASS and JOINED). can i use the free version (it will count as 1 class?) or the 10 entity class limit won't allow it?   thank you, Liran. #1 2015-04-10 09:59 hey. i am a student. and we are learnning inheritance in JPA for my assiment i have 1 bas ...

 
forum_thread

Threading Problem (maybe with Criteria)

Hi all I found some threading problems I do not understand: here is the the link to the testcase http://www.advolux.de/weblink%20forum/test.zip #1 2013-08-26 21:15 Hi all I found some threading problems I do not understand: After creating some testobjects (i.e. ...

 
api-jpa

javax.persistence.Table

Specifies the primary table for the annotated entity.(Annotation of JPA)

 
api-jpa

javax.persistence.Embedded

Specifies a persistent field or property of an entity whose value is an instance of an embeddable class.(Annotation of JPA)

 
api-jdo

Persistent.mappedBy

Name of the related member in the other class where this value is mapped (bidirectional relationship).(Annotation Element of javax.jdo.annotations.Persistent)

 
api-jpa

javax.persistence.Embeddable

Defines a class whose instances are stored as an intrinsic part of an owning entity and share the identity of the entity.(Annotation of JPA)

 
forum_thread

Understanding limitations of schema evolution

Hi, I am trying to understand the limitations of schema evolution and have read the material on http://www.objectdb.com/java/jpa/entity/schema as well as the link therein regarding manual schema update when changing a field’s name Yet, i am confused regarding how to handle the case where one re-factors a class by moving one if it's Fields to a different class. Is this case managable? Thanks #1 2014-10-31 12:31 Hi, I am trying to understand the limitations of schema evolution and have read the material on http://www.objectdb.c ...

 
api-jpa

AttributeOverride.name

(Required) The name of the property whose mapping is being overridden if property-based access is being used, or the name of the field if field-based access is used.(Annotation Element of javax.persistence.AttributeOverride)

 
api-jpa

SqlResultSetMapping.columns

Specifies the result set mapping to scalar values.(Annotation Element of javax.persistence.SqlResultSetMapping)

 
forum_thread

Is ObjectDB the only object database that supports JPA?

Other Object database does'nt support JPA?   #1 2012-09-07 13:01 Other Object database doesn't support JPA?   edit ...