org.openxava.model
Class PersistenceFacade

java.lang.Object
  org.openxava.model.PersistenceFacade

public class PersistenceFacade
extends java.lang.Object

To access to some persistence services in an abstract way.

We need this class to write some code in OpenXava that works in the same way if we are using Hibernate or EJB3 JPA (or other persistence technology).

This class can be used in custom application code, although for this case maybe it's better to use directly the EJB3 JPA (or Hibernate) API.

This class uses the underlayer persistence provider that it's configured in xava.properties with the property persistenceProviderClass.

If the methods fail they throw RuntimeException, the specific RuntimeException depends on the implementation technology.

Author:

Javier Paniza

Constructor Summary

PersistenceFacade()

Method Summary

static void

refreshIfManaged(java.lang.Object object) Refresh the state of the instance from the database, overwriting changes made to the entity, if any.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PersistenceFacade

public PersistenceFacade()

Method Detail

refreshIfManaged

public static void refreshIfManaged(java.lang.Object object)

Refresh the state of the instance from the database, overwriting changes made to the entity, if any.

If the object is null or it's not managed simply do nothing, but not fails.