I2JAV12 — support for local objects

The CORBA spec Section 3.7.6.1 includes the following:

• The usage of client side language mappings for local types shall be
  identical to
  those of equivalent unconstrained types.
• Language mappings shall specify server side mechanisms, including base
  classes
  and/or skeletons if necessary, for implementing local objects, so that
  invocation
  overhead is minimized.
• Invocations on local objects are not ORB mediated. Specifically,
  parameter copy
  semantics are not honored, interceptors are not invoked, and the execution
  context
  of a local object does not have ORB service Current object contexts that
  are
  distinct from those of the caller.

The IDL to Java spec section Section 1.12 Mapping for Interface,
subsection Local Interfaces states that:

• A local interface <typename> is mapped to interface <typename> which
  extends <typename>Operations, [... which an implementation can extend]
• A holder class is generated as for non-local interfaces.
• A helper class is also generated according to the normal rules, see
  Section 1.5,
  "Helpers", on page 1-13.
  No mention is made of Stubs, Ties or skeletons.

Section 1.20.2.1 Mapping for Local Interface states:
In the Java language mapping, the LocalObject class is used as a base class
for
implementations of a local interface.

I take it from the above that, quite reasonably, since "invocations on
local objects are
not ORB mediated", skeletons/Ties are not required for Java.

I can't see why Stubs should be required either, but
Section 1.21.6.1 Stub/Skeleton Architecture states:
Stubs support both local invocation and remote invocation, except in the
following
case: The stub is implementing an IDL interface that may only be invoked
locally (e.g.,
PortableServer::POA). In this case, the stub may choose to implement only
local
invocation.
which suggests that Stubs may be required (although the POA interface is
constrained
to be invoked locally, but not actually defined as local - is that the
difference?)

Incorporate revised text and close issue