Extract delimited text in Oracle BPM

Robinson J

Hi Experts

I have a payload within the BPM Process where a webservice returns me a list of approvers ex: tom,lee,Ben which are basically users. My requirement is to extract these users individually and assign to a node which is like target node below

Source Node

<xs:complexType name="approvalRouteByInvoiceNatureResponse">

    <xs:complexContent>

      <xs:extension base="tns:messageValueObject">

        <xs:sequence>

          <xs:element type="xs:string" name="approvalRoute" minOccurs="0"/>

          <xs:element type="xs:boolean" name="autoApprove" minOccurs="0"/>

          <xs:element type="tns:integrationResponse" name="integrationResponse" minOccurs="0"/>

          <xs:element type="tns:statusResponse" name="statusResponse" minOccurs="0"/>

        </xs:sequence>

      </xs:extension>

    </xs:complexContent>

  </xs:complexType>

and the target node would look like

<?xml version="1.0" encoding="windows-1252" ?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

            xmlns="http://www.example.org"

            targetNamespace="http://www.example.org"

            elementFormDefault="qualified">

  <xsd:element name="ApprovalRoute">

    <xsd:complexType>

    <xsd:sequence>

    <xsd:element name="Approvers" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>

    </xsd:sequence>

    </xsd:complexType>

  </xsd:element>

</xsd:schema>

The reason being i would like to do some logic on each user,what will be the best way to get the individual users from the webservice ,

Thanks for Help

Robin

Martien van den Akker

Hi,

You can transform them directly, using an XSLT. But, if you want to loop over the elements, and perform an action approver by approver, you should create a loop with a loop counter that selects each approver into a variable. Take a look at this article where I describe how I did it in PCS: https://blog.darwin-it.nl/2017/07/process-cloud-service-and-how-to-loop.html It works exactly the same way in BPM.

Regards,
Martien

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Martien van den Akker

I'm sorry, but what does this have to do with the question? How is this related to Oracle BPM Suite?

Regards,
Martien

Robinson J

Hi,

Thanks for the help but in your case , you already have a list, in my case I do not have a list, but a string which has comma delimited values. I need to extract each value and convert them to list of values, so that then i could then loop over them.

I tried a few functions in XSLT like oraext:create-nodeset-from-delimited-string but no luck.

I have the XSD of the List into which i would like to copy the extracted values.

<?xml version="1.0" encoding="UTF-8"?>

<schema attributeFormDefault="unqualified" elementFormDefault="qualified"

        targetNamespace="http://xmlns.oracle.com/A_OS46TCO_01/Project4/BPELProcess1"

        xmlns="http://www.w3.org/2001/XMLSchema">

  <element name="ApproverList">

    <complexType>

      <sequence>

        <element name="approver" type="string" maxOccurs="unbounded"/>

   

      </sequence>

    </complexType>

  </element>

</schema>

I then tried to have a XSLT like

<xsl:variable name="approvers" select="/ns0:iprocess/ns0:inputList"/>

      <xsl:variable name="pos" select='oraext:create-nodeset-from-delimited-string(tns:approver,$approvers,",")'></xsl:variable>

      <xsl:for-each select="$pos">

        <xsl:variable name="counter" select="position()"/>

        <tns:approver>

          <xsl:value-of select="$pos[$counter]"/>

        </tns:approver>

      </xsl:for-each>

This function oraext:create-nodeset-from-delimited-string seems to work on SOA - BPEL with Copylist - copy rule in the Assign Operation . Any idea on how to acheive the same is highly appreciated.

Thanks in Advance

Martien van den Akker

Oh, but then you have switched your source and target samples in your original question! That's how I interpretted it.

In that case, you need to understand that XSLT is actually a functional programming language, which means that variables in XSLT are immutable.

You can solve this by using recursion. See for intance https://blog.darwin-it.nl/2010/08/index-of-replace-and-key-value-parsing.html especially the replace template. I think you need a template like:

<xsl:template name="parseDelimitedString">  <xsl:param "delimitedStr"/>  <!-- https://www.w3schools.com/xml/xsl_functions.asp   <xsl:variable name="firstItem" select="substring-before($delimitedStr, ',')" />   <xsl:variable name="restDelimitedStr" select="substring-after($delimitedStr, ',')" />  <tns:approver>    <xsl:value-of select="$firstItem"/>  </tns:approver>  <xsl:call-template name="parseDelimitedString">    <xsl:with-param name="delimitedStr" select="$restDelimitedStr"/>  </xsl:call-template></xsl:template>

That you can call with:

  <xsl:call-template name="parseDelimitedString">    <xsl:with-param name="delimitedStr" select="select="/ns0:iprocess/ns0:inputList"/>  </xsl:call-template>

(Typed by heart, not tested)

Regards,

Martien

Robinson J

Hi,

Thanks a lot for the help, I just had to add the exit condition for the recursion and then could achieve my requirement.

  <xsl:template name="parseDelimitedString">

        <xsl:param name="delimitedStr"/>

        <!-- https://www.w3schools.com/xml/xsl_functions.asp -->

        <xsl:variable name="firstItem" select="substring-before($delimitedStr, ',')"/>

        <xsl:variable name="restDelimitedStr" select="substring-after($delimitedStr, ',')"/>

        <tns:approvers>

            <xsl:value-of select="$firstItem"/>

        </tns:approvers>

        <xsl:choose>

        <xsl:when test="contains($restDelimitedStr, ',')">

            <xsl:call-template name="parseDelimitedString">

                <xsl:with-param name="delimitedStr" select="$restDelimitedStr"/>

            </xsl:call-template>

        </xsl:when>         

          <xsl:otherwise>

            <tns:approvers>

              <xsl:value-of select="$restDelimitedStr"/>

            </tns:approvers>

          </xsl:otherwise>

        </xsl:choose>

       

    </xsl:template>

Martien van den Akker

Yes indeed: forgot that: Recursion => always add an end condition!

Nice that it works.

Regards,
Martien