[OPENJPA-1775] Get original object state for audit purpose

• Type: Question
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.0.0
• Component/s: Enhance, kernel
• Environment: GlassFish 3, OpenJpa 2.0
• Assignee: Unassigned
• Reporter: Radu B
• Created: 26/Aug/10 22:09
• Updated: 27/Aug/10 10:25
• Resolved: 27/Aug/10 10:25

Description

I need to get original object state before a merge() is called.

I tried in my service edit() method, by using :

public void edit(Customer customer) {
Customer initialState = null;
log.info("About to update customer id " + customer.getCustomerId() + " with name " + customer.getName());

PersistenceCapable currentState = (PersistenceCapable)customer;

try

{ StateManagerImpl sm = (StateManagerImpl)currentState.pcGetStateManager(); SaveFieldManager sfm = sm.getSaveFieldManager(); PersistenceCapable oldState = sfm.getState(); initialState = (Customer)oldState; log.info("Customer id " + customer.getCustomerId() + " OLD NAME WAS " + initialState.getName()); }

catch (Exception e)

{ log.severe("Failed to get old object state: " + e.toString()); }

getEntityManager().merge(customer);
}

I get the error:

SEVERE: Failed to get old object state: java.lang.ClassCastException: org.apache.openjpa.kernel.DetachedStateManager cannot be cast to org.apache.openjpa.kernel.StateManagerImpl

Can you please suggest a way to get the original loaded object?