[Hibernate-issues] [Hibernate-JIRA] Closed: (HB-422) any.class and binding HQL parameters

[<leg...@at...>]

Message:

   The following issue has been closed.

   Resolver: Gavin King
       Date: Thu, 23 Oct 2003 1:45 PM

Naah, this is not really doable.
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-422


Here is an overview of the issue:
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        Key: HB-422
    Summary: any.class and binding HQL parameters
       Type: Improvement

     Status: Closed
   Priority: Major
 Resolution: WON'T FIX

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.1 beta 4

   Assignee: 
   Reporter: Matjaz Smolej

    Created: Thu, 23 Oct 2003 8:33 AM
    Updated: Thu, 23 Oct 2003 1:45 PM

Description:
I have a persistent class with a property mapped with "any". Excerpt from the mapping file:

---
<any name="item" id-type="long" meta-type="eg.MyUserType"> 
        <column name="Type"/> 
        <column name="ID"/> 
</any>
---

Consider the following HQL where log.item is a property mapped with "any":

---
from eg.AuditLog log where log.item.class = :itemClass
---

When binding query parameter "itemClass" using method:

Query#setParameter(String name, Object value) 

one cannot use the preferred Class instance as the value parameter, but needs to use it's mapped value produced by any's meta-type.

If one wants to use the Class instance as a parameter, he must use the method:

Query#setParameter(String name, Object value, Type type) 

where type must be the same as specified with any's meta-type attribute (eg. Hibernate.custom(eg.MyUserType.class)).

I think this is redundant since Hibernate already knows the "meta-type" specified in "any" mapping. Hibernate could use this meta-type as a default type when binding query parameters using method Query#setParameter(String name, Object value).



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