If I remember correctly, if you want to address the nth element of a node-set you need to use the built-in position() context function, e.g.,
field[position() = $index] alex On Tue, Jan 20, 2009 at 8:02 PM, ZHAO Wenfeng <[email protected]> wrote: > Hello, > > I need fill a reply message which contains an array. But my BPEL process > doesn't work in ODE 2.0 when the index of the array in <to> section of the > assign activity takes a variable of type xsd:unsignedInt which has been > correctly intialized. > > The BPEL piece in question is: > > <assign> > <copy> > <from><literal > xsi:type="xsd:unsignedInt">2</literal></from> > <to variable="_i1"/> > </copy> > <copy> > <from><literal > xsi:type="xsd:string">hello</literal></from> > <to>$output0.body/xsd0:field1[$_i1]</to> <!-- It'll > be OK if $_i1 here is replaced with number 2 --> > </copy> > </assign> > > ODE 2.0 Build #87 (2009-1-8 2:25:04) reports an error for it as: > > 03:32:00,062 ERROR [ASSIGN] Assignment Fault: { > http://docs.oasis-open.org/wsbpel/2.0/process/executable}selectionFailure,lineNo=155,faultExplanation={http://docs.oasis-open.org/wsbpel/2.0/process/executable}selectionFailure<http://docs.oasis-open.org/wsbpel/2.0/process/executable%7DselectionFailure,lineNo=155,faultExplanation=%7Bhttp://docs.oasis-open.org/wsbpel/2.0/process/executable%7DselectionFailure>: > Multiple results for expression: {OXPath10Expression > $output0.body/xsd0:field1[$_i1]} > > > When I simply replace the variable with a number as the comments above > says, ODE works well. > > What's the problem? The WS-BPEL 2.0 specification says that "... > expressions that conform to the XPath 1.0 Expr production" in the section > "8.3.5. General Expressions". And in XPath recommendation, "Expr" production > allows "VariableReference" as the element position of a predicate. So is it > a BUG of ODE ? > > -------------- > FYR, the schema of the $output0.body is as follows: > <types> > <schema targetNamespace="http://example.com/request21.xsd"; > xmlns="http://www.w3.org/2000/10/XMLSchema"; > elementFormDefault="qualified" > > > <element name="RequestInfo" type="string"/> > > <element name="ResultInfo"> > <complexType> > <sequence> > <element name="field1" type="string" > maxOccurs="unbounded"/> > </sequence> > </complexType> > </element> > </schema> > </types> > > <message name="Request21OpOutput"> > <part name="body" element="xsd1:ResultInfo"/> > </message> > > In the BPEL file: > <variable name="output0" messageType="ws0:Request21OpOutput" /> > > -------------- > > > Best Regards > > Wenfeng > > >
