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

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On 17 December 2015 at 11:56, Kerry, Richard richard.kerry@xxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

>
>
> 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" />
>    <xsl:variable name="replacement-text" as="xs:string" select="
> $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::*" />
>
>
> On the first call your spec is a single document node with child element
children so
 $replace-spec/replace[1]

finds the first replacement.

But on later calls you pass $replace-1/following-sibling::*" which is a
sequence of replace elements so

$replace-spec/replace[1]

is empty.


Ypu want to write it always to take a sequence and selctt th first as

$replace-spec[1]

and of course pass a sequence in on the first call

David






>
>
>
>
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> *Richard Kerry*
>
> BNCS Engineer, SI SOL Telco & Media Vertical Practice
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