Assigning values to array in soa 10.1.3

Question

Dear team,
I am working on soa10.1.3 server. we have a complex element of string array.we created a varaible of that element. In while loop we need to pass values to array elements.How can we do that..we tried with indexvaraible..but getting error.
Regards,
Radha

Answer 1

schema is
<schema attributeFormDefault="unqualified"
     elementFormDefault="qualified"
     targetNamespace="http://xmlns.oracle.com/BPELProcess4"
     xmlns="http://www.w3.org/2001/XMLSchema">
     <element name="BPELProcess4ProcessRequest">
          <complexType>
               <sequence>
                    <element name="input" type="string"/>
               </sequence>
          </complexType>
     </element>
     <element name="BPELProcess4ProcessResponse">
          <complexType>
               <sequence>
                    <element name="result" type="string"/>
               </sequence>
          </complexType>
     </element>
<element name="element5">
<complexType>
<sequence>
<element name="result" minOccurs="0" maxOccurs="unbounded"
type="string"/>
</sequence>
</complexType>
</element>
</schema>
wdsl is
<?xml version="1.0" encoding="UTF-8"?>
<definitions name="BPELProcess4"
targetNamespace="http://xmlns.oracle.com/BPELProcess4"
xmlns="http://schemas.xmlsoap.org/wsdl/"
xmlns:client="http://xmlns.oracle.com/BPELProcess4"
xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/">
     <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     TYPE DEFINITION - List of services participating in this BPEL process
     The default output of the BPEL designer uses strings as input and
     output to the BPEL Process. But you can define or import any XML
     Schema type and use them as part of the message types.
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
     <types>
          <schema xmlns="http://www.w3.org/2001/XMLSchema">
               <import namespace="http://xmlns.oracle.com/BPELProcess4" schemaLocation="BPELProcess4.xsd" />
          </schema>
     </types>
     <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     MESSAGE TYPE DEFINITION - Definition of the message types used as
     part of the port type defintions
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
     <message name="BPELProcess4RequestMessage">
          <part name="payload" element="client:BPELProcess4ProcessRequest"/>
     </message>
     <message name="BPELProcess4ResponseMessage">
          <part name="payload" element="client:BPELProcess4ProcessResponse"/>
     </message>
<message name="BPELProcessMessage">
          <part name="payload" element="client:element5"/>
     </message>
     <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     PORT TYPE DEFINITION - A port type groups a set of operations into
     a logical service unit.
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
     <!-- portType implemented by the BPELProcess4 BPEL process -->
     <portType name="BPELProcess4">
          <operation name="initiate">
               <input message="client:BPELProcess4RequestMessage"/>
          </operation>
     </portType>
     <!-- portType implemented by the requester of BPELProcess4 BPEL process
     for asynchronous callback purposes
     -->
     <portType name="BPELProcess4Callback">
          <operation name="onResult">
               <input message="client:BPELProcess4ResponseMessage"/>
          </operation>
     </portType>
     <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     PARTNER LINK TYPE DEFINITION
     the BPELProcess4 partnerLinkType binds the provider and
     requester portType into an asynchronous conversation.
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
     <plnk:partnerLinkType name="BPELProcess4">
          <plnk:role name="BPELProcess4Provider">
               <plnk:portType name="client:BPELProcess4"/>
          </plnk:role>
          <plnk:role name="BPELProcess4Requester">
               <plnk:portType name="client:BPELProcess4Callback"/>
          </plnk:role>
     </plnk:partnerLinkType>
</definitions>
bpel file is
<?xml version = "1.0" encoding = "UTF-8" ?>
<!--
Oracle JDeveloper BPEL Designer
Created: Fri Aug 27 10:01:38 IST 2010
Author: ruck
Purpose: Asynchronous BPEL Process
-->
<process name="BPELProcess4"
targetNamespace="http://xmlns.oracle.com/BPELProcess4"
xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
xmlns:xp20="http://www.oracle.com/XSL/Transform/java/oracle.tip.pc.services.functions.Xpath20"
xmlns:bpws="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
xmlns:ns4="http://www.oracle.com/XSL/Transform/java/oracle.tip.xref.xpath.XRefXPathFunctions"
xmlns:ns1="http://xmlns.oracle.com/bpel/workflow/xpath"
xmlns:ldap="http://schemas.oracle.com/xpath/extension/ldap"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:ns3="http://www.oracle.com/XSL/Transform/java/oracle.tip.esb.server.headers.ESBHeaderFunctions"
xmlns:ns2="http://xmlns.oracle.com/bpel/services/IdentityService/xpath"
xmlns:client="http://xmlns.oracle.com/BPELProcess4"
xmlns:bpelx="http://schemas.oracle.com/bpel/extension"
xmlns:ora="http://schemas.oracle.com/xpath/extension"
xmlns:orcl="http://www.oracle.com/XSL/Transform/java/oracle.tip.pc.services.functions.ExtFunc">
<!--
PARTNERLINKS
List of services participating in this BPEL process
-->
<partnerLinks>
<!--
The 'client' role represents the requester of this service. It is
used for callback. The location and correlation information associated
with the client role are automatically set using WS-Addressing.
-->
<partnerLink name="client" partnerLinkType="client:BPELProcess4"
myRole="BPELProcess4Provider"
partnerRole="BPELProcess4Requester"/>
</partnerLinks>
<!--
VARIABLES
List of messages and XML documents used within this BPEL process
-->
<variables>
<!-- Reference to the message passed as input during initiation -->
<variable name="inputVariable"
messageType="client:BPELProcess4RequestMessage"/>
<!-- Reference to the message that will be sent back to the requester during callback -->
<variable name="outputVariable"
messageType="client:BPELProcess4ResponseMessage"/>
<variable name="elementMessage"
messageType="client:BPELProcessMessage"/>
<variable name="count" type="xsd:int"/>
</variables>
<!--
ORCHESTRATION LOGIC
Set of activities coordinating the flow of messages across the
services integrated within this business process
-->
<sequence name="main">
<!-- Receive input from requestor. (Note: This maps to operation defined in BPELProcess4.wsdl) -->
<receive name="receiveInput" partnerLink="client"
portType="client:BPELProcess4" operation="initiate"
variable="inputVariable" createInstance="yes"/>
<!--
Asynchronous callback to the requester. (Note: the callback location and correlation id is transparently handled using WS-addressing.)
-->
<assign name="Assign_1">
<copy>
<from expression="number(1)"/>
<to variable="count"/>
</copy>
</assign>
<while name="While_1"
condition="bpws:getVariableData('count') &lt;= number(5)">
<assign name="Assign_2">
<copy>
<from expression="'value'"/>
<to variable="elementMessage" part="payload"
query="/client:element5/client:result[bpws:getVariableData('count')]"/>
</copy>
<copy>
<from expression="bpws:getVariableData('count')+number(1)"/>
<to variable="count"/>
</copy>
</assign>
</while>
<invoke name="callbackClient" partnerLink="client"
portType="client:BPELProcess4Callback" operation="onResult"
inputVariable="outputVariable"/>
</sequence>
</process>
For the count 1 code is working fine.. for count=2 thrwoing exception
<while>
Assign_2
[2010/08/27 10:23:20] Updated variable "elementMessage" less
-<elementMessage>
-<part xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="payload">
-<element5 xmlns="http://xmlns.oracle.com/BPELProcess4">
<result>value
</result>
</element5>
</part>
</elementMessage>
[2010/08/27 10:23:20] Updated variable "count" More...
<count>2
</count>
Assign_2
[2010/08/27 10:23:20] Error in <assign> expression: <to> value is empty at line "86". The XPath expression : "" returns zero node, when applied to document shown below: More...
[2010/08/27 10:23:20] "{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure" has been thrown. More...
</while>
</sequence>
[2010/08/27 10:23:20] "BPELFault" has not been caught by a catch block.
[2010/08/27 10:23:20] There is a system exception while performing the BPEL instance, the reason is "faultName: {{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure} messageType: {} parts: {{summary=XPath query string returns zero node. According to BPEL4WS spec 1.1 section 14.3, The assign activity &lt;to&gt; part query should not return zero node. Please check the BPEL source at line number "86" and verify the &lt;to&gt; part xpath query. Possible reasons behind this problems are: some xml elements/attributes are optional or the xml data is invalid according to XML Schema. To verify whether XML data received by a process is valid, user can turn on validateXML switch at the domain administration page. }} ". Please check the error log file for more infromation. Please try to use bpel fault handlers to catch the faults in your bpel process. If this is a system exception, please report this to your system administrator. Administrator could perform manual recovery of the instance from last non-idempotent activity or dehydration point. More...
[2010/08/27 10:23:20] BPEL process instance #"60002" cancelled