Hi Andy,
After I wrote the message I realized I had no idea what I was talking about.
On Apr 29, 2005, at 12:33 PM, Andy Jefferson wrote:
<?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>
So is it sufficient that the SimpleInterface metadata be ahead of the SimpleClass metadata in the .jdo file?
What "SimpleInterface" MetaData ? It's an interface, and since JPOX doesn't
support specification of <interface> as such yet then it doesn't have any
MetaData. I assume you mean the MetaData for the class that has a field of
type SimpleInterface ? If that is in the same file as the MetaData for
SimpleClass then all should be ok.
If they are in different files then you need to let JPOX know about the
implementation classes somehow (it can't just go off scanning around the
CLASSPATH). There are many ways ... the simplest and one that is
implementation-independent would be to call pm.getExtent(SimpleClass) which
will load the MetaData for SimpleClass.
Ok, now I understand. You need to have metadata for SimpleClass known to the implementation by the time the FieldsOfSimpleInterface is loaded, because FOSI doesn't know about SimpleClass; it only knows about SimpleInterface.
There is a similar issue if you do getObjectById and pass in an oid of a class that the implementation hasn't seen yet. There's no way for the implementation to find the class that has that oid class.
Craig
-- Andy Java Persistent Objects JDO - JPOX
Craig Russell Architect, Sun Java Enterprise System http://java.sun.com/products/jdo 408 276-5638 mailto:[EMAIL PROTECTED] P.S. A good JDO? O, Gasp!
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