BizTalk Training – Mapping – How to implement multi-level Muenchian grouping in BizTalk Maps

I already talked about Muenchian Grouping in BizTalk Maps in the past:

• BizTalk Training – Mapping – Muenchian Grouping and Sorting in BizTalk Maps without losing Map functionalities

Inspired by a question in BizTalk Server Forums: XSLT Mapping Question (Summing Values)… I decided to solved this problem and publish this sample to help this user… what can I say… I simply love mapping problems!!!

So how can we can we perform multi-level Muenchian grouping in BizTalk Maps and perform some mathematical operations on this group?

You can read more about the problem in the thread, nut basically the problem is: To sum all records and create a unique record for records having same account type and city!

Solution

Add two scripting functoids to the map:

• In the first, configure to an “Inline XSLT Call Template” and put key expression
  

  <xsl:key name="groups" match="Record" use="concat(City, '|', AccountType)"/>
  

• In the second, configure to an “Inline XSLT” and the rest of the XSL
  

  <xsl:for-each select="Record[generate-id(.)=generate-id(key('groups',concat(City, '|', AccountType)))]">
     <Record>
        <xsl:variable name="city" select="City/text()" />
        <xsl:variable name="type" select="AccountType/text()" />
  
        <AccountType>
           <xsl:value-of select="$type" />
        </AccountType>
        <City>
           <xsl:value-of select="$city" />
        </City>
  
        <xsl:variable name="negativeTotal" select="sum(//Record[(City = $city) and (AccountType = $type) and (Sign = '-')]/Price)" />
        <xsl:variable name="positiveTotal" select="sum(//Record[(City = $city) and (AccountType = $type) and (Sign = '+')]/Price)" />
        <xsl:choose>
           <xsl:when test="$positiveTotal &gt; $negativeTotal">
              <Sign>+</Sign>
              <Price>
                 <xsl:value-of select="$positiveTotal - $negativeTotal" />
              </Price>
           </xsl:when>
           <xsl:otherwise>
              <Sign>-</Sign>
              <Price>
                 <xsl:value-of select="$negativeTotal - $positiveTotal" />
              </Price>
           </xsl:otherwise>
        </xsl:choose>
     </Record>
  </xsl:for-each>
  

• Drag a link from the Second Scripting Functoid to the record “Record” in the destination schema;

How to implement multi-level Muenchian grouping in BizTalk Maps (34.9 KB)
Microsoft | MSDN Code Gallery