[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-5157) Discriminating on a value in a joined table

[Gail Badner (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gail Badner updated HHH-5157:
-----------------------------

    Issue Type: New Feature  (was: Bug)

> Discriminating on a value in a joined table
> -------------------------------------------
>
>                 Key: HHH-5157
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5157
>             Project: Hibernate Core
>          Issue Type: New Feature
>    Affects Versions: 3.5.1
>            Reporter: Nicholas White
>
> I'm re-opening http://opensource.atlassian.com/projects/hibernate/browse/HHH-506 as the following case doesn't work, and HHH-506 doesn't provide a solution in enough detail:
> Tables (for an Oracle database):
> create table values (object integer, paramname varchar2(100), stringvalue varchar2(100), numbervalue integer);
> create table types (paramname varchar2(100), isstring char(1));
> create table objects (id integer);
> Classes (missing getters and setters for readability reasons):
> class Object { private Integer id; private Set<Value> parameters;}
> abstract class Value {private String paramname;}
> class StringValue extends Value { private String value;}
> class IntegerValue extends Value { private Integer value;}
> I'd like to use the isstring column in the types table as a discriminator - if it is 'Y' then the StringValue subclass should be generated with a value field populated from the stringvalue column of the values table. If it is 'N' then I'd like an IntegerValue subclass to be created with its value field populated from the numbervalue column of the values table.
> Please don't reject this without providing an hbm.xml mappings file that maps this structure (and that works with an Oracle database). 
> Thanks,
> Nick

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