I am using hibernate, struts, extjs in my project.

I have a Customer object with these fields:

custId,
custName, address, phone

and in my project from UI side I get an object customer with custName.

So I need to update the above object(custName is unique). I have only one object with the same customer name. So I will get that object using customer name (object from DB).

Now I have to save the object with the updated customer name.

If I save as follows I have Customer Object from UI, is cust

Customer cust1 = getCustomerByName(cust.getCustName());

cust.setCustId(cust1.getCustId()); save(cust);

If I do this I lose the customer address and phone number.

So, how can I copy one object not null or not empty field values to another object of same type.

Can any one please help. I just stuck here. It's stopping me to save.

Thanks in advance!