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From Andy Jefferson <a...@jpox.org>
Subject Re: Collections of interfaces
Date Fri, 29 Apr 2005 18:05:42 GMT
> I expect that to remove the JPOX extension, we will add the
> <implements> tag as follows:
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE jdo PUBLIC "-//Sun Microsystems, Inc.//DTD Java Data Objects
> Metadata 2.0//EN" "http://java.sun.com/dtd/jdo_2_0.dtd">
> <jdo>
> <package name="org.apache.jdo.tck.pc.fieldtypes">
> <class name="SimpleClass" identity-type="application"
>      objectid-class="org.apache.jdo.tck.pc.fieldtypes.SimpleClass$Oid">
>    <implements name="SimpleInterface">
> <field name="id" primary-key="true"/>
> </class>
> </package>
> </jdo>

Craig/Michelle,

I've added support for <implements> to JPOX CVS - will be in the next nightly 
build, dated 20050430 or later. You should be able to do as per the example 
above. Give it a try and report any problems on the forum - would be nice to 
avoid using any JPOX extensions in your TCK code.

It does rely on JPOX having already encountered the MetaData for a class that 
has the <implements> at the point when the list of classes implementing the 
interface is needed. So in your example above, it will need to have met the 
"SimpleClass" class (and its MetaData) at the point when the 
"SimpleInterface" is first met. 

The JPOX "implementation-classes" is still valid to be used since, as Erik 
said, defines which classes are valid to be used for a particular field.

-- 
Andy
Java Persistent Objects JDO - JPOX

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