[xsl] Recursion not recursing, or not passing parameter. Multiple search/ replace.

["Kerry, Richard richard.kerry@xxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

I am trying to write an XSLT stylesheet that does a multiple search and
replace.  In order to make it work with multiple search/replace string pairs I
think I need to use recursion, calling the built-in replace function for each
pair.  However I don't seem to be getting the parameter set, or used, properly
when I try to do the recursive call to do the next pair.



I set up the pairs in a sequence of elements as follows:

 <xsl:variable name="replace-spec" >
   <replace source="smith_component" replacement="{$new-name}" />

   <replace source="$ref-uuid-1" replacement="{$new-uuid-1}" />
   <replace source="$ref-uuid-2" replacement="{$new-uuid-2}" />

 </xsl:variable>

That's passed to my replace function, along with the source string that needs
all the replacements done.

 <xsl:variable name="template-text-2" as="xs:string"
select="my:replace-sequence( $template-text, $replace-spec )" />

The replace-sequence function is supposed to call (built-in function)
"replace()" using the first element in the spec, then recurse and call itself
with the first result string and the remainder of the spec (if there is any
remainder).  As follows.



<xsl:function name="my:replace-sequence">
   <xsl:param name="source-string" as="xs:string" />
   <xsl:param name="replace-spec" />



   <xsl:variable name="replace-1" select="$replace-spec/replace[1]" />

   <xsl:variable name="source-text" as="xs:string"
select="$replace-1/@source<mailto:$replace-1/@source>" />
   <xsl:variable name="replacement-text" as="xs:string"
select="$replace-1/@replacement<mailto:$replace-1/@replacement>" />



   <xsl:variable name="template-text-2" as="xs:string" select="replace(
$source-string, $source-text, $replacement-text )" />



   <xsl:variable name="replace-remainder"
select="$replace-1/following-sibling::*" />

   <xsl:choose>
     <xsl:when test="$replace-remainder" >
        <xsl:variable name="template-text-3" as="xs:string"
select="my:replace-sequence( $template-text-2, $replace-remainder )" />
        <xsl:value-of select="$template-text-3" />
     </xsl:when>
     <xsl:otherwise>
        <xsl:value-of select="$template-text-2" />
     </xsl:otherwise>
   </xsl:choose>
</xsl:function>

I've used a few xsl:message calls to see what the size of the sequence is at
various points, and to confirm that the recursion call is being done.
However, having checked that the size of replace-remainder is two before the
call, as soon as it re-enters my:replace-sequence the size has become zero.



Can anyone advise what I may be doing wrong.



Regards,

Richard.








[Blue line]
Richard Kerry
BNCS Engineer, SI SOL Telco & Media Vertical Practice
T: +44 (0)20 3618 2669
M: +44 (0)7812 325518
4 Triton Square, Regents Place, London NW1 3HG
richard.kerry@xxxxxxxx<https://webmail.siemens-it-solutions.com/owa/redir.asp
x?C=9fb20d019e3e4cb99344d708709a3177&URL=mailto%3arichard.kerry%40atos.net>

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