About mapping

forum_thread

Possible Bug in MEMBER OF

Hello! I maybe found another bug in version 2.3.3. I'll send you a test DB via support ticket. Try the following query in explorer: SELECT u FROM Unit u WHERE :user MEMBER OF u.users Set user to TrackerUser#8 If i run this quey i get: Invalid operand type at.co.pjm.tracker.persistence.TrackerUser for operator MEMBER OF SELECT u FROM Unit u WHERE :user MEMBER OF u. ==> users <== In my opinion the result should be Unit#4004 #1 2011-11-11 17:45 Hello! I maybe found another bug in version 2.3.3. I'll send you a test DB via support ticket ...

 
api-jpa

JPA Annotations for Classes

Reference (JavaDoc) of JPA 2 class annotations, including @Entity, @Embeddable, @IdClass, @Cacheable, @EntityListeners, etc. JPA defines three types of persistable classes which are set by the following annotations: javax.persistence.Embeddable javax.persistence.Entity javax.persistence.MappedSuperclass Chapter 2 of the Obje ...

 
forum_thread

Using of ConcurrentHashMap as attribute

Hello, it is possible to use an entity attribute of type java.util.concurrent.ConcurrentHashMap Your web site http://www.objectdb.com/object/db/database/features 'Object Model & Data Types' has no guidelines about this data type. Best regards #1 2015-05-13 06:26 Hello, it is possible to use an entity attribute of type java.util.concurrent.ConcurrentHashMap Y ...

 
api-jpa

Temporal.value

The type used in mapping java.util.Date or java.util.Calendar.(Annotation Element of javax.persistence.Temporal)

 
api-jpa

javax.persistence.Persistence

Bootstrap class that is used to obtain an EntityManagerFactory in Java SE environments.(Class of JPA)

 
api-jpa

getKeyJavaType()

Return the Java type of the map key.(Method of javax.persistence.metamodel.MapAttribute)

 
api-jpa

AttributeOverrides.value

(Required) One or more field or property mapping overrides.(Annotation Element of javax.persistence.AttributeOverrides)

 
api-jdo

Constants.PROPERTY_MAPPING_CATALOG

Mapping "javax.jdo.mapping.Catalog"(Static Field of javax.jdo.Constants)

 
api-jpa

javax.persistence.metamodel.StaticMetamodel

The StaticMetamodel annotation specifies that the class is a metamodel class that represents the entity, mapped superclass, or embeddable class designated by the value element.(Annotation of JPA)

 
forum_thread

Does JPA have any configuration to create DDL's that are database specific

There some JPA classes who's names more that 30 character. This worked well in MySQL , Derby , PostgreSQL but when it was tried on oracle , we hit the constraint that oracle has of 30 characters.   So basically my question is that is there any JPA configuration to create DDL's that are specific to database   ... But this is relevant only for ORM (Object Relational Mapping) JPA and ignored by ObjectDB. ObjectDB Support ...