About EntityNotFoundException
Retrieving JPA Entity Objects
Explains how to use JPA to retrieve entity objects from the database.... accessed. If the requested object does not exist an EntityNotFoundException javax.persistence.EntityNotFoundException JPA exception Thrown by the persistence ...
Storing JPA Entity Objects
Explains how to use JPA to store (persist) entity objects in the database. New entity objects can be stored in the database either explicitly by invoking the persist persist(entity) EntityManager's method Make an instance managed and persistent. See JavaDoc Reference Page... method or ...
JPA Exceptions
Reference (JavaDoc) of the JPA exception classes, including PersistenceException, EntityExistsException, EntityNotFoundException, LockTimeoutException, NonUniqueResultException, NoResultException, OptimisticLockException, PessimisticLockException, QueryTimeoutException, RollbackException, TransactionRequiredException.... javax.persistence.EntityNotFoundException ... object is not found: javax.persistence.EntityNotFoundException or during query execution: ...
EntityNotFoundException()
Constructs a new EntityNotFoundException exception with null as its detail message.(Constructor of javax.persistence.EntityNotFoundException)
EntityNotFoundException(message)
Constructs a new EntityNotFoundException exception with the specified detail message.(Constructor of javax.persistence.EntityNotFoundException)
javax.persistence.EntityNotFoundException
Thrown by the persistence provider when an entity reference obtained by EntityManager.getReference is accessed but the entity does not exist.(Exception of JPA)
EntityManager.merge gives EntityNotFoundException
Just started using objectdb (2.3.4). Calling EntityManager.merge for a new (non-managed) object gives EntityNotFoundException. I am perplexed by this. See attached test case. Thanks for your assistance. Full error output is: Exception in thread "main" [ObjectDB 2.3.4] javax.persistence.EntityNotFoundException Entity is not found: classdb.Test#'id' (error 631) at com.objectdb.jpa.EMImpl.merge(EMImpl.java:456) at classdb.Test.main(Test.java:32) ... EntityManager.merge for a new (non-managed) object gives EntityNotFoundException. I am perplexed by this. See attached test case. Thanks ... in thread "main" [ObjectDB 2.3.4] javax.persistence.EntityNotFoundException Entity is not found: classdb.Test#'id' ...
javax.persistence.EntityManager
Interface used to interact with the persistence context.(Interface of JPA)
getReference(entityClass, primaryKey)
Get an instance, whose state may be lazily fetched.(Method of javax.persistence.EntityManager)
refresh(entity, properties)
Refresh the state of the instance from the database, using the specified properties, and overwriting changes made to the entity, if any.(Method of javax.persistence.EntityManager)
