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How to get the persistent object from a proxy

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mota

Post subject: How to get the persistent object from a proxy

Posted: Mon Apr 26, 2004 3:00 pm

Regular

Joined: Wed Nov 05, 2003 10:57 pm
Posts: 96

I have the following association:

A (*) ---- (1) B
B is abstract
B1 subclass of B
B2 subclass of B

when I do aB = A.getB(), I get B's proxy (which is expected)

aB is either of type B1 or B2. aB instanceof B1 or B2 returns false (expected with proxies).

My question is what is the best way to get the persistent object (B1 or B2) from the proxy so that dynamic casting works?

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mlavwilson

Post subject:

Posted: Mon Apr 26, 2004 3:16 pm

Newbie

Joined: Thu Apr 22, 2004 3:21 pm
Posts: 15

I don't think this is a proxy issue. Try ***.getClass().isAssignableFrom(***)

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mota

Post subject:

Posted: Mon Apr 26, 2004 3:25 pm

Regular

Joined: Wed Nov 05, 2003 10:57 pm
Posts: 96

aB is B's proxy (which is a subclass of B). B1 and B2 are subclasses of B. "isAssignableFrom" as "instanceof" would not work between aB and B1/B2.

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gavin

Post subject:

Posted: Mon Apr 26, 2004 9:12 pm

Hibernate Team

Joined: Tue Aug 26, 2003 12:50 pm
Posts: 5130
Location: Melbourne, Australia

Hibernate.getClass(foo) returns the underlying class

session.get(Bar.class, foo.getId()) will do a "typecast"

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