How to Change Annotion values dynamically

Question

Hi,
I need to know how we can change the values of annotation dynamically. For example, my application uses DB2 database for which table name and schema name are reqired for Entities as follows.
*@Entity*
*@Table (name*="EMPLOYEE", schema="SC235")
public class Employee {
I would like to change the Schema name at run time.ie, the same application may be run with different DB2 data base which conatins same table structures and names but with different Schema names. Is there any way we could change the Schema name at runtime. Atleast if any body suggest how to configure Schema name through persistence.xml or any other property files wold be great.
Note: When I tried to assign a value from resource bundle, it is throwing the error "the value for annotaion attribute *Table.schema* must be a constant expression" during compilation itself.
Please help.

Answer 1

sk_java wrote:
Hi,
I need to know how we can change the values of annotation dynamically.Annotations in source code must be compile-time constants. The annotation objects returned by the runtime are immutable.
That said, there are a few ways to get the effect of changing annotation values. First, you can use the redefine classes API and then getting a new annotation object will have the updated values. Also, an annotation type is just a specialized kind of interface and that interface can be implemented by your own classes too.