[Hibernate-issues] [Hibernate-JIRA] Created: (HB-562) Using Session.load(Class, Serializable) Proxy is of incorrect type

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Here is an overview of the issue:
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        Key: HB-562
    Summary: Using Session.load(Class, Serializable) Proxy is of incorrect type
       Type: Bug

     Status: Unassigned
   Priority: Major

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.0.3

   Assignee: 
   Reporter: Tom Sedge

    Created: Wed, 17 Dec 2003 7:27 AM
    Updated: Wed, 17 Dec 2003 7:27 AM
Environment: Windows 2000, Sun JDK

Description:
Possibly, this may be considered a feature rather than a bug.

Suppose I have two classes, say Product and Computer, where Computer extends Product.  Both are proxied by Hibernate.

In a generic application I wish to load and step through all Products using Session.load(Product.class, <id>).  If I use Session.load(Product.class, <Computer Id>), the Computer object is correctly loaded and wrapped in a Proxy.  It behaves as a Computer.

However, the Proxy thinks it is wrapping a Product, not a Computer, because it uses the class requested.  This means that Computer.class.isAssignableFrom(<proxy>.getClass()) fails.

I consider this a bug, even though I know Product.class has been requested.  That's because for an unproxied object you get a Computer instance, not a Product, so the behaviour depends on whether the object is proxied.

P.S.: It is not possible for the generic application to know that it is about to load a Computer subclass, so it must rely on loading using Product.class, which works fine with unproxied classes.




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