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How to map parameterized UserType as part of a collection

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MikePloed

Post subject: How to map parameterized UserType as part of a collection

Posted: Wed Feb 08, 2006 3:36 pm

Expert

Joined: Tue Dec 07, 2004 6:57 am
Posts: 285
Location: Nürnberg, Germany

Hi,
I'm stuck with a problem concerning mapping a parameterized UserTypes as a collection.

I have the following class:

Code:

public class MyCLass{
...
    private Set<PiecelistElement> ples;
...
} 

I would like to populate the set using a parameterized UserType. I could imagine the following:

Code:

<set name="ples" table="MY_PLES_TABLE">
        <key column="myClassId"/>
        <element>
            <type name="my.comp.common.hibernate.PleType">
                <param name="type">my.comp.domain.PleElement</param>
            </type>
        </element>
</set> 

Unfortunately this mapping isn't possible. I read in another posting here that this relates to an incomplete dtd definition of element in the hibernate mappings dtd (http://forum.hibernate.org/viewtopic.php?t=944563&start=0&postdays=0&postorder=asc&highlight=collection+usertype)

Any help on this is highly appreciated.

Hibernate version: 3.1.1

Mapping documents:

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steve

Post subject:

Posted: Wed Feb 08, 2006 9:36 pm

Hibernate Team

Joined: Tue Aug 26, 2003 3:00 pm
Posts: 1816
Location: Austin, TX

What happens if you try a type definition and then use <element type="your-type-def-name"/>? Should work. In that case would just be an omision in the DTD.

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MikePloed

Post subject:

Posted: Thu Feb 09, 2006 5:45 am

Expert

Joined: Tue Dec 07, 2004 6:57 am
Posts: 285
Location: Nürnberg, Germany

Hi Steve,
thanks for your quick answer. Basically your solution would work with a non parameterized UserType, but in this case I need to be able to pass a parameter to the UserType.

I have patched the element definition of the hibernate-mapping dtd as follows and this appears to work:

Code:

<!-- Declares the element type of a collection of basic type -->

<!ELEMENT element (column|formula|type)*>
   <!ATTLIST element column CDATA #IMPLIED>
   <!ATTLIST element node CDATA #IMPLIED>
   <!ATTLIST element formula CDATA #IMPLIED>
   <!ATTLIST element type CDATA #IMPLIED>
   <!ATTLIST element length CDATA #IMPLIED>
   <!ATTLIST element precision CDATA #IMPLIED>
   <!ATTLIST element scale CDATA #IMPLIED>
   <!ATTLIST element not-null (true|false) "false">
   <!ATTLIST element unique (true|false) "false">

Do you want me to rise a JIRA Task for an update of the DTD?

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steve

Post subject:

Posted: Thu Feb 09, 2006 9:10 am

Hibernate Team

Joined: Tue Aug 26, 2003 3:00 pm
Posts: 1816
Location: Austin, TX

type defs *can be* parameterized.

Sure, enter a JIRA issue so I don't forget

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MikePloed

Post subject:

Posted: Thu Feb 09, 2006 9:20 am

Expert

Joined: Tue Dec 07, 2004 6:57 am
Posts: 285
Location: Nürnberg, Germany

Brilliant... I didn't get to the idea of adding the param in the typedef.

Thanks a lot...

Nevertheless I have just added a JIRA task for the extension of the DTD: HHH-1470

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