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Is it possible to store Super Class object in mongodb

 
Anupam Dee
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I have two classes
Class A
Class B
class B extends A

i m storing it in mongodb as follows

A a=new B();
crud.save(a);

the data is being stored with _class : B

But i want to store it as A,
Is it possible?
Can i store the object with _class as its superclass?
 
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