getPreviousInstance() from EntityHome

[vata2999]

Hi,
i created a component bean extends EnittyHome when i update an entity
i want to getPreviousInstance before update without hit the database
how can i achieve this ?

when i click on edit link wire method return the instance that i want to, however i could not preserve it until update is it good idea to hold it into pageContext ?

getPageContext.set("prevInstance",getInstance());

[monkeyden]

It's still the same instance so modifications to the object's properties will still be seen.  You likely have to copy it, which can be cumbersome with an object graph.

[vata2999]

I face sth wierd even after i load entity from database all the object value bind to new
instance

@End
public String update(){
MadeLicense prevMl = (MadeLicense)getEntityManager().createQuery("from MadeLicense ml where mlid = :mlid")
.setParameter("mlid",getIstance().getId()).getSingleResult(); // this return new instance
MadeLicenseLog mlLog = new MadeLicenseLog();
BeanUtils.copyPropeties(prevMl, mlLog);
super.updated();
}