Issue 2484:  Need read_Value(clz) on InputStream (java2idl-rtf)
Source:  (, )
Nature:  Uncategorized Issue
Severity: 
Summary: Summary: It is possible for an RMI/IDL value class to contain an IDLEntity type
 that was mapped from an IDL valuetype.  In this case, the GIOP
 encoding of the IDLEntity type sent by an IDL/Java or C++ application
 to an RMI-IIOP appplication may not contain type information (if the 
 actual type is the same as the declared type).
 
 In order to allow the ValueHandler to demarshal these IDLEntity types,
 an additional API call such as read_Value(Class clz) in needed on the 
 org.omg.CORBA.portable.InputStream class.  This allows the ValueHandler
 to pass the expected class (which it knows) to the InputStream.
 
 For symmetry, a write_Value(java.io.Serializable obj, Class clz) method
 should be added to org.omg.CORBA.portable.OutputStream.  This would
 allow RMI-IIOP marshalling to use the same optimized encoding for this
 case as is possible for C++ and IDL/Java.
 

Resolution: Closed, accepted
Revised Text: The following method is added to org.omg.CORBA_2_3.portable.InputStream:

 java.io.Serializable read_value(Class clz);

 This method unmarshals a value type from the input stream.  clz is the
 declared type of the value to be unmarshaled.

The following method is added to org.omg.CORBA_2_3.portable.OutputStream:

 void write_value(java.io.Serializable value, Class clz);

 This method marshals a value type to the output stream.  value is the value
 to be marshaled, and clz is the declared type of the value to be marshaled.
Actions taken:
February 22, 1999: received issue
June 4, 1999: closed issue
Discussion: 

End of Annotations:=====
ate: Mon, 22 Feb 1999 14:33:40 +0000
From: Simon Nash <nash@hursley.ibm.com>
Organization: IBM
To: issues <issues@omg.org>
CC: java2idl <java2idl-rtf@omg.org>
Subject: Need read_Value(clz) on InputStream

It is possible for an RMI/IDL value class to contain an IDLEntity type
that was mapped from an IDL valuetype.  In this case, the GIOP
encoding of the IDLEntity type sent by an IDL/Java or C++ application
to an RMI-IIOP appplication may not contain type information (if the 
actual type is the same as the declared type).

In order to allow the ValueHandler to demarshal these IDLEntity types,
an additional API call such as read_Value(Class clz) in needed on the 
org.omg.CORBA.portable.InputStream class.  This allows the
ValueHandler
to pass the expected class (which it knows) to the InputStream.

For symmetry, a write_Value(java.io.Serializable obj, Class clz)
method
should be added to org.omg.CORBA.portable.OutputStream.  This would
allow RMI-IIOP marshalling to use the same optimized encoding for this
case as is possible for C++ and IDL/Java.

   Simon
-- 
Simon C Nash, Technology Architect, IBM Java Technology Centre
Tel. +44-1962-815156   Fax +44-1962-818999    Hursley, England
Internet: nash@hursley.ibm.com   Lotus Notes: Simon Nash@ibmgb