Issue 4188: CosExternaliazation Service (bug?) (issues)
Source:  (, )
Nature: Uncategorized Issue
Severity: 
Summary: Page 2-7 of the CosExternalization Service Specification (April 2000)
defines the following interfaces:
CosStream::Node
CosStream::Role
CosStream::Relationship

A CosStream::Node inherits from the CosStream::Streamable interface and
therefore is a streamable object -- it has an external_form_id attribute
that enables a FactoryFinder to recreate the object using the
create_uninitialized operation.

Unfortunately, the CosStream::Role and CosStream::Relationship interfaces do
not support the CosStream::Streamable interface and therefore are not
"streamable;" in particular, there is no standard method to obtain a KEY for
them when it is time to internalize them.

Perhaps, I am missing something (it wouldn't be the first time ;-), but
having them support the Streamable interface would certainly make
implementation much easier. Might I suggest the following:

interface Role: CosGraphs::Role, CosStream::Streamable {
...
}
interface Relationship: CosGraphs::Relationship, CosStream::Streamable {
...
}

at a minimum this would permit the CosStream::Node internalize_node()
operation and the CosStream::StreamIO read_graph() operation to use a KEY
value in the FactoryFinder to instantiate the object, before it is
internalized.

Resolution: 
Revised Text: 
Actions taken:
February 5, 2001: received issue
Discussion: 

End of Annotations:=====
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Date: Mon, 05 Feb 2001 07:56:09 -0500
To: juergen
From: Linda Heaton <linda@omg.org>
Subject: Fwd: CosExternaliazation Service (bug?)
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Does this need to go to "Issues"?

/Linda



Date: Fri, 02 Feb 2001 12:50:30 -0800
From: "Wesolowski, Charles" <charles.wesolowski@lmco.com>
Subject: CosExternaliazation Service (bug?)
To: "'tech-editor@omg.org'" <tech-editor@omg.org>
X-Mailer: Internet Mail Service (5.5.2650.21)

To whom it may concern:

Page 2-7 of the CosExternalization Service Specification (April 2000)
defines the following interfaces:
CosStream::Node
CosStream::Role
CosStream::Relationship

A CosStream::Node inherits from the CosStream::Streamable interface
and
therefore is a streamable object -- it has an external_form_id
attribute
that enables a FactoryFinder to recreate the object using the
create_uninitialized operation.

Unfortunately, the CosStream::Role and CosStream::Relationship
interfaces do
not support the CosStream::Streamable interface and therefore are not
"streamable;" in particular, there is no standard method to obtain a
KEY for
them when it is time to internalize them.

Perhaps, I am missing something (it wouldn't be the first time ;-),
but
having them support the Streamable interface would certainly make
implementation much easier. Might I suggest the following:

interface Role: CosGraphs::Role, CosStream::Streamable {
...
}
interface Relationship: CosGraphs::Relationship, CosStream::Streamable
{
...
}

at a minimum this would permit the CosStream::Node internalize_node()
operation and the CosStream::StreamIO read_graph() operation to use a
KEY
value in the FactoryFinder to instantiate the object, before it is
internalized.

Please let me know if I'm off-base here.

Sincerely,
Chuck Wesolowski
Chief Software Engineer
Advanced BMC4I Segment
Lockheed Martin Space Systems Company, Huntsville, AL


Linda A. Heaton

Object Management Group
linda@omg.org
1-781-444-0404