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Forum
15

Remove an entity which attributes were changed - OptimisticLockException

We use an OSGi environment and we have three OSGi plugins.   In plugin A an entity is loaded and the entity is passed to plugin B. Plugin B changes an attribute on the entity. Plugin C removes the entity from the database. After commit the transaction an exception is caused with optimistic lock
Issue
15

Support Attribute Conversion for Persistence

The @Converter annotation and the Attribute Converter interface have two big benefits: 1) They make it possible to persist any as-yet-unsupported java types that do not implement java.io.Serializable. (If they do, it is possible to persist them automatically by turning on the 
Forum
15

The attribute column name (EXCEPTION) is a reserved SQL-99 keyword.

How do I fix this error/warning that Netbeans gives me? "The attribute column name (EXCEPTION) is a reserved SQL-99 keyword." This warning indicates mapping to a field in the database that its name conflicts with SQL. This is not an issue with ObjectDB but could be with other DBMS. To remove
Forum
15

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
Forum
14

Accessiblity of attributes in entities in several OSGi-Bundles

Accessiblity of attributes in entities in several OSGi-Bundles
JPA Doc
14

javax.persistence.criteria.FetchParent

a fetch join to the specified attribute using an inner join. Create a fetch join to the specified attribute using an inner join. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting fetch join Throws: IllegalArgumentException - if attribute of the given
JPA Doc
14

javax.persistence.metamodel.CollectionAttribute

javax.persistence.metamodel Interface CollectionAttribute Superinterfaces: Attributeattributes. Since: JPA 2.0 ClassATTRIBUTE, the Java element type is returned
JPA Doc
14

javax.persistence.metamodel.ListAttribute

javax.persistence.metamodel Interface ListAttribute Superinterfaces: Attributeattributes. Since: JPA 2.0 Class getBindableJavaType() Return the Java type ... of the object is PLURAL_ATTRIBUTE, the Java element type is returned. If the bindable type is SINGULAR
JPA Doc
14

javax.persistence.metamodel.MapAttribute

javax.persistence.metamodel Interface MapAttribute Superinterfaces: Attributeattributes. Since: JPA 2.0 Class getBindableJavaType() Return the Java type ... of the object is PLURAL_ATTRIBUTE, the Java element type is returned. If the bindable type is SINGULAR
JPA Doc
14

javax.persistence.metamodel.PluralAttribute

javax.persistence.metamodel Interface PluralAttribute Superinterfaces: Attributeattributes. Since: JPA 2.0 ClassATTRIBUTE, the Java element type