Re: [wsrp-interop] Interpretation of minOccur=0 and nillable=tuein the envelope.

[Sharmila Jayaram <sharmila.jayaram@oracle.com>]

Hi,

My comments in red :-

Thanks,
Sharmila

Richard Jacob wrote:
> Hi Avi,
>
> "Klein, Avi" <avi.klein@sap.com> wrote on 05/30/2004 08:45:02 AM:
>
> > Hi all,
> >
> > This is an old issue we once had an E-mail thread on and is still
> > unresolved for the SAP Consumer.
> >
> >   
>
> We had this discussion about minOccurs="0" and nillable="true" some time
> ago and found that none of the stacks dealt with these attributes 100%
> correctly. However the problems which came up here were mostly combinations
> of these two on one element.
> In general the various stack have differnet schema validation levels, some
> complain some not.
>
> > I would appreciate your input on how do you interpret the following case:
> >
> > In the WSDL, the specific data type contains an element which is
> > “minOccur=0” and in runtime this element is in fact null. How should
> > it be presented in the envelope:
> > a. <elementname xsi:nill=true/>
> > b. <elementname/>
> > c. omitted al together
> >   
>
> a. is not valid as long as nillable="true" is not set in the schema.
> b. is valid, however the mapping of e.g. xml to java prevents this. For
> example <element> could be a string. <element/> should be mapped to an
> empty string (which is different from a String=null.
> c. is valid and has the correct mapping
>
> > In the WSDL, the specific data type contains an element which is
> > “nillable="true" and in runtime this element is in fact null. How
> > should it be presented in the envelope:
> > a. <elementname xsi:nill=true/>
> > b. <elementname/>
> > c. omitted al together
> >   
>
> a. is valid and the correct mapping
> b. is valid, because the minOccurs/maxOccurs rules apply (both default to
> 1), however the same mapping rules apply here as above.
> c. is not valid if minOccurs="0" is not set.
>
> > I experience different behavior from the IBM producer and the Oracle
> > producer for these cases: for example IBM producer permits xsi:
> > nill=true for registration context in getMarkup while Oracle don’t.
> >   
>
> Did you really cross-check it? Is there a serialization fault or does
> Oracle simply not allow a non-registered Consumer?
> I assume Oracle has registrationRequired set to true, which means you must
> register first, and I could easily imagine in that case that
> a getMarkup() with a nill registrationContext is rejected.
> Mike, can you cross check?
     The Oracle producer sets requiresRegistration
to true and hence  requires a registration context for all operations taking
this parameter other than getServiceDescription().   Hence getMarkup() will
not allow a non-registered consumer.
> > And Oracle allows omitting minOccur=0 elements while IBM don’t.
> >   
>
> This statement makes me really nervous :-)
> I would really be surprised if you experienced validation errors.
> I think we have a lot of cases where minOccurs="0" elements are ommitted by
> other consumers.
> Can you please provide a message trace of a case where an element is
> minOccurs="0", you ommit it on the message and we fail because of
> validation?
>
> In the message below the Oracle consumer fails validation (correctly)
> because the request message indeed is invalid.
> In MarkupParams the <locales> and <mimeTypes> elements are namespaced by
> "http://www.w3.org/2001/XMLSchema".
> However they must be namespaced by "http://www.w3.org/2001/XMLSchema".
>
> > For the following request to Oracle producer:
> > <SOAP-ENV:Envelope
> >   
> xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
> > xmlns:wn3="http://www.w3.org/1999/XMLSchema" xmlns:wn2="http://www.
> > w3.org/2000/10/XMLSchema" xmlns:wn1="http://www.w3.org/2001/XMLSchema"
> > xmlns:wn0="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="
> > http://www.w3.org/2001/XMLSchema-instance" xmlns:wn4="urn:oasis:
> > names:tc:wsrp:v1:wsdl" xmlns:tns="urn:oasis:names:tc:wsrp:v1:wsdl">
> >        <SOAP-ENV:Body>
> >              <prt0:getMarkup xmlns:prt0=C>
> >                     <prt0:registrationContext>
> >                            <prt0:registrationHandle>C:148.87.122.
> > 191:4c7e10:f942d6eb23:-1f4</prt0:registrationHandle>
> >                     </prt0:registrationContext>
> >                     <prt0:portletContext>
> >
> >   
> <prt0:portletHandle>E:1:default</prt0:portletHandle
> >                     </prt0:portletContext>
> >                     <prt0:runtimeContext>
> >                            <prt0:userAuthentication>wsrp:none</prt0:
> > userAuthentication>
> >                            <prt0:portletInstanceKey/>
> >                     </prt0:runtimeContext>
> >                     <prt0:userContext>
> >                            <prt0:userContextKey>USER.
> > PRIVATE_DATASOURCE.un:testadmin</prt0:userContextKey>
> >                     </prt0:userContext>
> >                     <prt0:markupParams>
> >                            <prt0:secureClientCommunication>false</
> > prt0:secureClientCommunication>
> >                            <wn1:locales>en-US</wn1:locales>
> >                            <wn1:mimeTypes>text/html</wn1:mimeTypes>
> >                            <prt0:mode>wsrp:view</prt0:mode>
> >
> >   
> <prt0:windowState>wsrp:normal</prt0:windowState>
> >                            <prt0:navigationalState/>
> >                     </prt0:markupParams>
> >              </prt0:getMarkup>
> >        </SOAP-ENV:Body>
> > </SOAP-ENV:Envelope>
> >
> > I get:
> > <env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"
> >   
> xmlns:xsd
> > ="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.
> > org/2001/XMLSchema-instance" xmlns:enc="http://schemas.xmlsoap.
> > org/soap/encoding/" xmlns:ns0="urn:oasis:names:tc:wsrp:v1:types"
> > env:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
> >        <env:Body>
> >              <env:Fault>
> >                     <faultcode>env:Server</faultcode>
> >                     <faultstring>Internal Server Error
> > (deserialization error: deserialization error: expected element is
> > missing: {http://www.w3.org/2001/XMLSchema}locales)</faultstring>
> >              </env:Fault>
> >        </env:Body>
> > </env:Envelope>
> >
> >
> > I’ll appreciate any lead on what does your producer expect to
> > receive as a valid request (a sample of a received valid request
> > envelope etc.).
> >   
>
> Hope this helps.
>
> Richard