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From "John Hawkins (JIRA)" <axis-c-...@ws.apache.org>
Subject [jira] Commented: (AXISCPP-250) Errors in handling minOccurs="0" (optional) elemnts in SOAP message
Date Tue, 03 May 2005 16:29:08 GMT
     [ http://issues.apache.org/jira/browse/AXISCPP-250?page=comments#action_64365 ]
     
John Hawkins commented on AXISCPP-250:
--------------------------------------

Adrian - has this been fixed in 1.5 ? We did a lot of work in his area.

> Errors in handling minOccurs="0" (optional) elemnts in SOAP message
> -------------------------------------------------------------------
>
>          Key: AXISCPP-250
>          URL: http://issues.apache.org/jira/browse/AXISCPP-250
>      Project: Axis-C++
>         Type: Bug
>   Components: Serialization
>     Versions: 1.3 Final
>  Environment: All platforrms
>     Reporter: Samisa Abeysinghe
>     Priority: Critical
>  Attachments: WS021A.wsdl
>
> The following is from the mailing list. See http://marc.theaimsgroup.com/?t=109902729200001&r=1&w=2
for more information :
> > All elements in the response have minOccurs="0", so they can be 
> omitted. Is this another issue?
> Good point Adrian! I missed that :(.
> This must be the reason that is causing the problem.
> To my knowledge, WSDL2Ws tool does not deal with this correctly (I came 
> to this conclusion by
> looking at the generated code for the WSDL). It expects all the 
> elements to be there, and throws
> an error, if at least a single element is missing.
> Also, the ordering of the element is very critical for the generated 
> code to work.
> e.g.
> param->names = (xsd__string_Array&)pIWSDZ->getBasicArray(XSD_STRING, 
> "names",0);
> param->addrs = (xsd__string_Array&)pIWSDZ->getBasicArray(XSD_STRING, 
> "addrs",0);
> param->xdirInd = pIWSDZ->getElementAsString("xdirInd",0);
> param->noOfBillRecords = pIWSDZ->getElementAsInt("noOfBillRecords",0);
> (the '0' parameters in above code indicates that namespace is NULL - it 
> must have used NULL
> instead of 0)
> If "xdirInd" is missing in the response, and "noOfBillRecords" is 
> present,
> getElementAsString("xdirInd",0) call on the serializer will see that 
> next element is
> "noOfBillRecords" and will error. 
> If we are looking for an optional element, we are doing a serious 
> mistake here (and thus this is a
> serious bug)
> The correct logic would be to 
> 1. Test if the element is opetional
>    if yes
>        1.1. Test if the current element is what we are looking for
>        if yes
>            1.1.1 return Success
>        if no
>            1.1.2 Back track to point to the start of the elemnt and 
> return Success
>    if no
>        1.2 return Failure
> I hope the above algorithm does not violate the pull model we have. 
> Additionally, can we expect the SOAP message to have the elements in 
> the same order defined by the
> WSDL? If yes (I think it is) we are OK. If not we have another bug :(

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