//$Id: EJB3FlushEntityEventListener.java 11282 2007-03-14 22:05:59Z epbernard $
package org.hibernate.ejb.event;
import org.hibernate.EntityMode;
import org.hibernate.SessionFactory;
import org.hibernate.engine.EntityEntry;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.engine.Status;
import org.hibernate.event.def.DefaultFlushEntityEventListener;
import org.hibernate.metadata.ClassMetadata;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.type.Type;
/**
* Overrides the LifeCycle OnSave call to call the PreUpdate operation
*
* @author Emmanuel Bernard
*/
public class EJB3FlushEntityEventListener extends DefaultFlushEntityEventListener implements CallbackHandlerConsumer {
private EntityCallbackHandler callbackHandler;
public void setCallbackHandler(EntityCallbackHandler callbackHandler) {
this.callbackHandler = callbackHandler;
}
public EJB3FlushEntityEventListener() {
super();
}
public EJB3FlushEntityEventListener(EntityCallbackHandler callbackHandler) {
super();
this.callbackHandler = callbackHandler;
}
@Override
protected boolean invokeInterceptor(
SessionImplementor session, Object entity, EntityEntry entry, Object[] values, EntityPersister persister
) {
boolean isDirty = false;
if ( entry.getStatus() != Status.DELETED ) {
if ( callbackHandler.preUpdate( entity ) ) {
isDirty = copyState( entity, persister.getPropertyTypes(), values, session.getFactory() );
}
}
return super.invokeInterceptor( session, entity, entry, values, persister ) || isDirty;
}
/**
* copy the entity state into the state array and return true if the state has changed
*/
private boolean copyState(Object entity, Type[] types, Object[] state, SessionFactory sf) {
ClassMetadata metadata = sf.getClassMetadata( entity.getClass() );
Object[] newState = metadata.getPropertyValues( entity, EntityMode.POJO );
int size = newState.length;
boolean isDirty = false;
for ( int index = 0; index < size ; index++ ) {
if ( !types[index].isEqual( state[index], newState[index], EntityMode.POJO ) ) {
isDirty = true;
state[index] = newState[index];
}
}
return isDirty;
}
}