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From "Michael Bouschen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JDO-204) Need attribute on field element for type
Date Tue, 15 Nov 2005 23:28:28 GMT
    [ http://issues.apache.org/jira/browse/JDO-204?page=comments#action_12357741 ] 

Michael Bouschen commented on JDO-204:
--------------------------------------

I understand the scenario that the user wants to store instances of different PC types in
the collection. This means even with JDK 5 you need to define the field with Collection<Object>
in the Java source. The JDO metadata can be more specific when specifying the element-type.
All you need is the possibility  to specify more than just one element-type. However, I think
this can be done using the existing element-type, so I do not see the need for another metadata
element such as element-implementation-type.

I think the spec could allow that the element-type value is a list of type names, but I'm
not sure whether we should require that every JDO implementation needs to support multiple
element-types. Maybe this should be an optional feature. The same holds true for multiple
type names in field-type. 

> Need attribute on field element for type
> ----------------------------------------
>
>          Key: JDO-204
>          URL: http://issues.apache.org/jira/browse/JDO-204
>      Project: JDO
>         Type: Bug
>   Components: api20
>     Reporter: Michelle Caisse
>     Assignee: Craig Russell

>
> Need to supply instantiated type information for Object & Interface fields.

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