[TAVERNA-60] XML splitters return wrong elements on maxOccurs=0

• Type: Bug
• Status: To Do
• Priority: Minor
• Resolution: Unresolved
• Component/s: Taverna Common Activities
• Labels: wsdl
• Assignee: Unassigned
• Reporter: Stian Soiland-Reyes
• Created: 28/Jun/10 10:59
• Updated: 28/Apr/15 11:41

Description

If a web service defines an output element with invalid maxOccurs=0, for instance:

  <xsd:element maxOccurs="0" minOccurs="0" name="outputUrl" type="xsd:anyURI"/>

Then Taverna's XML splitters will, instead of giving a warning about the invalid URL, return a list of the content of all elements instead of <outputUrl>. So for instance if the input is:

<blah>
  <fish>Soup</fish>
  <count>15</count>
  <outputUrl>http://google.com/</outputUrl>
</blah>

Given that "fish" and "count" are declared properly, their ports from the XML output splitter are correct, but for the port 'outputUrl' instead you get:

Soup
15
http://google.com/

Suggested fix:
Give warning about invalid WSDL - and return error document on the given port. (Or don't include the port). We can't just return the element when maxOccurs is wrong, what if there's two <outputUrl>s - should we return a list (depth 1) on the port then? What about if it was declared as maxOccurs=1 (ie. we make the port of depth 0) and we get 3 such elements? Probably best to give an error whenever there is a mismatch.