Hibernate java list not updating

19-Nov-2017 14:10

In this tutorial, I am discussing few thoughts around method present in hibernate session class. It updates the database with values from a detached entity.Sometimes we face situation where we application database is modified with some external application/agent and thus corresponding hibernate entity in your application actually becomes out of sync with it’s database representation i.e. Refresh method was updating the entity with latest database information. Merging is performed when you desire to have a detached entity changed to persistent state again, with the detached entity’s changes migrated to (or overriding) the database.Hibernate provides transparent persistence for Plain Old Java Objects (POJOs).The only strict requirement for a persistent class is a no-argument constructor, not necessarily public.

Hibernate supports the mapping of custom value types.When using an XML file, Hibernate can generate skeleton source code for the persistence classes. Hibernate can use the XML file or the Java annotations to maintain the database schema.There are provided facilities to arrange one-to-many and many-to-many relationships between classes.The given instance does not become associated with the session.

This operation cascades to associated instances if the association is mapped with cascade=”merge”.

Hibernate ORM (Hibernate in short) is an object-relational mapping tool for the Java programming language.

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