I2JAV11 — Need clarification on custructor(s) for stream-based

In OMG IDL to Java Language Mapping spec, $1.21.5.1 "Stub/Skeleton Architecture" there
are examples of stream- and DSI- based stubs/skeletons. These examples do not
provide any constructors (this mean thay have only default ones). But, it seems that
signatures of constructors should be clarified, because orb vendors have a freedom in
defining these signatures. For example, the VisiBroker's 4.0 idl2java compiler
generates stubs that have only default constructors, but in jdk 1.2 there stubs that
have only constructors that take org.omg.CORBA.portable.Delegate as a single
parameter. This leads to impossibility for generated stubs to extend the jdk 1.2
provided ones.

Since the example is not normative, vendors are free to add whatever constructors they
would like. This makes it impossible to generate code for interfaces that are
inherited from interfaces for which code is generated by another vendor, which is true
especially in the case of Java 2 and its inclusion of some stubs.

I would like to propose the following:
To Seciton 1.21.5.1 under subheading Stub Design, add a bullet:

Stubs are not required to define any constructors. However, if they do define special
constructors, a constructor with no arguments must also be defined.

This ensures that all stubs are guaranteed to have the no argument constructor
irrespective of whether they have other constructors or not.

see below