About false


Typo in ObjectDB 1.0 Manual

Support > Knowledge Base > ObjectDB 1.0 Manual > Chapter 7 "JDOQL Queries" > Section 7.2 "Query Filter Syntax" > Subsection "Fields" > Second to last sentence Remove "not" from that sentence.   "An attempt to access a field or invoke a method using a null reference results in a false evaluation for the containing expression but no exception is not thrown."   ... or invoke a method using a null reference results in a false evaluation for the containing expression but no exception is not ...



Interface used to interact with the second-level cache.(Interface of JPA)



Annotation for the key of a map relation.(Annotation of JDO)


Unable to delete the .odb file programatically

Hi, I created the test.odb file, read the contents and now trying the delete the odb file using objectd2.x. I see the folder there are two files created test.odb and test.odb$. Using the following code to delte the odb files ... = file. delete ( ) ; // getting false value for deleted boolean } When i am calling ...



Determine the load state of an entity.(Method of javax.persistence.PersistenceUtil)



(Optional) Whether to apply the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities.(Annotation Element of javax.persistence.OneToOne)



Sets the copyOnAttach setting.(Method of javax.jdo.PersistenceManager)



If true, at rollback, fields of newly persistent instances are restored to their values as of the beginning of the transaction, and the instances revert to transient.(Method of javax.jdo.Transaction)


Apache Tomee 1.5.2: Failed to use JTA (TransactionManager is not found)

Hello, ObjectDB team! I am struggling with getting ObjectDB 2.5.0 to work with clean Apache Tomee 1.5.2 with transaction-type="JTA". I don't have any configurations in Tomee (objectdb.jar is in Tomee's classpath) nor other parts, excepting the following persistence.xml: ... > <exclude-unlisted-classes > false </exclude-unlisted-classes > <properties > ...


Metamodel Attribute NOT EQUALS to same Attribute in a different EntityManager

Attribute from Metamodel initialized on @PostConstruct event IS NOT EQUALS of any Attribute from Metamodel of a different EntityManager. I am testing one application over Spring Web MVC and I can not post one Simple Test Case. The problem is it: If I have two moments of initialization of "javax.persistence.metamodel" from EntityManager and these two metamodels come from different EntityManagers and the one of these is on a @PostConstruct event, they return not equals Attributes using the same entity.   ... equals ( sameAttributeOnController ) //is false   edit ...