XSLT mapping sometimes throw ArrayOutOfBoundsException

Question

Hi
I have a simple XSLT mapping that is supposed to group elements based on an identificator (number).
My issue is that when testing message through PI, it sometimes throw ArrayOutOfBoundsException and sometimes not, with the same records involved..!!
I have tested it all in XML Spy and there it always works.
The XSLT looks like this:
     <xsl:for-each select="Invoice_KA49">
          <xsl:variable name="Ident">
               <xsl:value-of select="Identificator"/>
          </xsl:variable>
          <GroupElement>
               <xsl:copy-of select="../[Identificator=$Ident]"/><!--../-->
          </GroupElement>
     </xsl:for-each>
Anyone knows why this happens? Any help would be appreciated!
Thanks.
regards Ole

Answer 1

Hi Ole, looks like you produce a document with duplicate entries which have to be removed in a next step. Maybe the duplicate entries blow up the document. When you want to group Invoice_KA49 elements based on the key Identifikator, as Udo already suggest you should only select distinct values in the for-each loop, e.g.
<xsl:for-each select="//Invoice_KA49[Identifikator=not(./Identifikator=preceding-sibling::Invoice_KA49/Identifikator)]">
In this way you do not produce duplicate entries.
Unfortunately we cannot use the function
distinct-value(..)
here since it's only available in xslt 2.0.
Best regards, Martin