[jboss-user] [JBoss jBPM] - Assigning to one of many elements (maxOccurs="unbounded")

[miket]

I've just started to investigating the JBoss jBPM/BPEL piece (so please excuse me if my use of the terminology is a little flaky) and I'm trying to adapt it to work with the following complex message type (SWMSubmission):


  |   <types>
  | 
  |     <schema targetNamespace="urn:samples:swmessage" xmlns="http://www.w3.org/2001/XMLSchema">
  | 
  | 	<complexType name="SWMKeyValuePair">
  | 		<sequence>
  | 			<element name="swmName" type="xsd:string" minOccurs="1" maxOccurs="1"/>
  | 			<element name="swmValue" type="xsd:string" minOccurs="1" maxOccurs="1"/>
  | 		</sequence>
  | 	</complexType>
  | 	
  | 	<complexType name="SWMSubmission">
  | 		<sequence>
  | 			<element name="swmEventName" type="xsd:string" minOccurs="1" maxOccurs="1"/>
  | 			<element name="swmEventData" type="typ:SWMKeyValuePair" minOccurs="1" maxOccurs="unbounded"/>
  | 		</sequence>
  | 	</complexType>
  | 
  |     </schema>
  | 
  |   </types>
  | 

In my bpel process document I declare a variable:


  |                 <variable name="swmSubmission" messageType="swm:swmSubmission" />
  | 

and attempt to assign values to it:


  |                         <assign name="fillSWMessage">
  |                           <copy>
  |                             <from variable="balanceChange" part="customerName" />
  |                             <to variable="swmSubmission" part="body"
  |                               query="/body/swmEventName" />
  |                           </copy> 
  |                           <copy>
  |                             <from variable="balanceChange"  part="customerName"/>
  |                             <to variable="swmSubmission" part="body"
  |                               query="/body/swmEventData[1]/swmName" />
  |                           </copy>  
  | 		          <copy>
  | 		            <from variable="balanceChange" part="customerName" />
  | 		            <to variable="swmSubmission" part="body"
  | 			      query="/body/swmEventData[1]/swmValue" />
  |                           </copy>
  |                         </assign>
  | 

When fully deployed and the service invoked I get an error. If I remove the parts of the 'assign' that access the (possible) multiple elements then everything works:


  |                         <assign name="fillSWMessage">
  |                           <copy>
  |                             <from variable="balanceChange" part="customerName" />
  |                             <to variable="swmSubmission" part="body"
  |                               query="/body/swmEventName" />
  |                           </copy> 
  |                         </assign>
  | 

so I'm assuming I've made some basic error in my use of this complex type somewhere. The error I get is shown below:


  | 2006-11-01 10:47:00,462 DEBUG [org.jboss.ws.server.ServiceEndpoint] Outgoing SOAPMessage
  | <env:Envelope xmlns:env='http://schemas.xmlsoap.org/soap/envelope/'>
  |  <env:Header/>
  |  <env:Body>
  |   <env:Fault>
  |    <faultcode>env:Server</faultcode>
  |    <faultstring>The service is not in an appropiate state for the requested operation</faultstring>
  |   </env:Fault>
  |  </env:Body>
  | </env:Envelope>
  | 2006-11-01 10:47:00,462 ERROR [org.jboss.ws.server.ServiceEndpoint] Cannot process metrics
  | java.lang.ClassCastException: org.jboss.ws.soap.SOAPBodyElementDoc
  | 	at org.jboss.ws.soap.SOAPBodyImpl.getFault(SOAPBodyImpl.java:121)
  | 	at org.jboss.ws.server.ServiceEndpoint.handleRequest(ServiceEndpoint.java:262)
  | 	at org.jboss.ws.server.ServiceEndpointServlet.doPost(ServiceEndpointServlet.java:120)
  | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
  | 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
  | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  | 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  | 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  | 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  | 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  | 	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  | 	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
  | 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  | 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  | 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  | 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  | 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  | 	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
  | 	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  | 	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  | 	at java.lang.Thread.run(Thread.java:595)
  | 
  | 

but this seems to be the response to any kind of problem (in fact I get this error intermittently using the tutorial as boxed).

I wasn't sure whether indexing of swmEventData should start at 0 or 1 so I tried them both with no joy. Is there some sort of intialisation I should be doing? Any help would be appreciated.

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