About map

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 ... You can persist a Map field holding a  ConcurrentHashMap instance but it will be loaded ...

 
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   #1 2013-05-21 11:05 There some JPA classes who's names more that 30 character. This worked well in MySQL , Derby , PostgreSQL but ...