JAV2I12 — Mapping subclasses of custom-marshaled Java classes to IDL

The Java to IDL mapping spec says that serializable Java classes that
have a writeObject method are mapped to IDL custom valuetypes. This
should also apply to any Java subclasses of these classes, since otherwise
the generated IDL is illegal. (An IDL non-custom valuetype can't
inherit from an IDL custom valuetype.)

Proposed resolution:

In section 1.3.5.6 of the Java to IDL mapping spec, change the first sentence
of the second paragraph from

If the class does not implement java.io.Externalizable but does have a
writeObject method, ...

to:

If the class does not implement java.io.Externalizable but does have a
writeObject method, or extends such a class directly or indirectly, ...

Closed, accepted. See revised text below