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  1. OMG Issue

CORBA34 — Polymorphic Valuetypes and the DII

  • Key: CORBA34-181
  • Legacy Issue Number: 3674
  • Status: open  
  • Source: Humboldt-Universitaet ( Martin von Loewis)
  • Summary:

    Using the static invocation interfaces, it is possible to receive a
    valuetype that derives from the one declared in an operation, as long
    as a valuetype factory is known in the receiver (truncation is not the
    issue here).

    The same is not possible at the DII: When creating the request, the
    caller must indicate what type it expects, by forming a named value.
    Conceptually, the typecode in the named value should be the typecode
    of the base of all acceptable value types. However, if the ORB
    receives a derived type, it has no means of unmarshalling it - even if
    the application has knowledge about the derived type.

    What is missing is an interface to make typecodes of value types known
    to the ORB; with those, the ORB could then understand the CDR of the
    valuetype, and create a DynAny when asked to.

  • Reported: CORBA 2.3.1 — Wed, 7 Jun 2000 04:00 GMT
  • Updated: Tue, 27 Aug 2019 10:51 GMT