config_db usage: base class versus derived class objects

[mramdas]

Is it possible to  do a  uvm_config_db::set()  for an  object of derived class type  using the base class handle  and  later do a   uvm_config_db::get()  of same object  using  the derived class handle

 

Since  a base class handle can be used to point to a derived class object and later typecase, I thought this would work, but doesn't seem to be so.

 

Any  help will be appreciated?

 

 

Here is an example

 

class  BaseA ;

endclass

 

class DerivedA extends BaseA

endclass

 

1) Set config_db

DerivedA a1;

a1 =  DerivedA::create()

uvm_config_db#(DerivedA)::set(this, "" ,  "myobj",  a1);

 

 

2) Get config_db

BaseA  a1;

DerivedA a2;

uvm_config_db#(BaseA)::get(this, "" ,  "myobj", a1);

$cast(a2, a1);

[dave_59]

Use uvm_config_db#(BaseA)::set() to match the uvm_config_db#(BaseA)::get()

 

Then you need to test the result of the $cast to know if the object was overridden or not.