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From "Craig Russell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JDO-403) JDO2 Annotations
Date Sun, 24 Jun 2007 16:26:26 GMT

    [ https://issues.apache.org/jira/browse/JDO-403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12507695

Craig Russell commented on JDO-403:

Andy sez:
> You have to have an array of Columns because if the implementation is mapping a field
to multiple Columns then they are needed. e.g java.awt.Color JPOX maps to 4 cols. How do I
embed that and specify the mapping if only one column is available? 

Can you give an example of this? As I understand it, if you have an embedded field of type
java.awt.Color you would map it to four columns each of which has a field name, e.g. field
r, field g, field b, field a. So you only need one column per field in this case. 

But there are other cases where it is useful to map a field to multiple columns.

> JDO2 Annotations
> ----------------
>                 Key: JDO-403
>                 URL: https://issues.apache.org/jira/browse/JDO-403
>             Project: JDO
>          Issue Type: New Feature
>          Components: api2
>    Affects Versions: JDO 2 final
>            Reporter: Andy Jefferson
>            Assignee: Michelle Caisse
>             Fix For: JDO 2 maintenance release 1
>         Attachments: embedded.patch, jdo_2_1_annotations.jar
> It would be desirable for JDO2 to have its own set of annotations. We have developed
a set within JPOX that would likely serve as a starting point for such a set. In my opinion
they should be
> 1. Split into javax.jdo.annotations.jdo and javax.jdo.annotations.orm
> 2. Move ORM attributes from some of the JDO annotations and have a ORM annotation.

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