RE: [xsl] java Regex call

[David.Pawson@xxxxxxxxxxx]

Just curious Jeni,
Using: 

<xsl:output method="xml" indent="yes"/>
  <xsl:variable name="regex" select="'(([^_]*)_PARA)'"/>
  <xsl:variable name="input" select="'ABC_PARA__PARA'"/>
  <xsl:template match="/">
   <xsl:analyze-string select="$input" regex="{$regex}">
      <xsl:matching-substring>
        <RULE_MATCH>
          Input    <xsl:value-of select="$input" />
        </RULE_MATCH>
        <REGEX><xsl:copy-of select="$regex" /></REGEX>
        <GROUP1><xsl:value-of select="regex-group(1)" /></GROUP1>
        <GROUP2><xsl:value-of select="regex-group(2)" /></GROUP2>
        <GROUP3><xsl:value-of select="regex-group(3)" /></GROUP3>
.
.
      </xsl:matching-substring>
      <xsl:non-matching-substring>
        <mismatch><xsl:value-of select="."/></mismatch>
      </xsl:non-matching-substring>
    </xsl:analyze-string>

  </xsl:template>

produces

<?xml version="1.0" encoding="UTF-8"?>
<RULE_MATCH>
          Input    ABC_PARA__PARA</RULE_MATCH>
<REGEX>(([^_]*)_PARA)</REGEX>
<GROUP1>ABC_PARA</GROUP1>
<GROUP2>ABC</GROUP2>
<GROUP3/>
.
.
      <mismatch>_</mismatch>
<RULE_MATCH>
          Input    ABC_PARA__PARA</RULE_MATCH>
<REGEX>(([^_]*)_PARA)</REGEX>
<GROUP1>_PARA</GROUP1>
<GROUP2/>
<GROUP3/>
.
.

Why are there two lots of output please? 

regards DaveP


> -----Original Message-----
> From: Jeni Tennison 
> If you're using Saxon 7.6, why not use the built-in regular expression
> support rather than Java extensions?
> 
> > Example: if my regex is defined as:-
> >
> >  (([^_]*)_PARA)|((.*?)(PARA)(.*?))
> >
> >  and my input is "ABC_PARA"
> >
> >  Then I need to know what portions of the input matched
> >  each (if any) part of the regex groups, ([^_]*) and (.*?) etc,.
> >  in terms of group number and matching string.
> 
> If you use <xsl:analyze-string> then within the
> <xsl:matching-substring>, the regex-group() function gives you access
> to the values of the regex groups. Try:
> 
>   <xsl:for-each select="$rule//Type">
>     <xsl:variable name="tdlType" select="." />
>     <xsl:analyze-string select="." regex="{$regex}">
>       <xsl:matching-substring>
>         <RULE_MATCH>
>           <xsl:value-of select="$rule//@name" />
>         </RULE_MATCH>
>         <REGEX><xsl:copy-of select="$regex" /></REGEX>
>         <GROUP1><xsl:value-of select="regex-group(1)" /></GROUP1>
>         <GROUP2><xsl:value-of select="regex-group(2)" /></GROUP2>
>         <GROUP3><xsl:value-of select="regex-group(3)" /></GROUP3>
>         ...
>       </xsl:matching-substring>
>     </xsl:analyze-string>
>   </xsl:for-each>
> 
> Of course you need to know what regular expression is being used to be
> able to tell which regex groups you're actually interested in...
> 
> By the way, I'm not sure why you're using "//" in $rule//@name -- this
> will return all the name attributes of all the elements that are
> descendants of $rule, as well as of $rule itself, and return them in a
> whitespace-separated list (this being XSLT 2.0). Is that what you
> really want?
> 
> Cheers,
> 
> Jeni
> 
> ---
> Jeni Tennison
> http://www.jenitennison.com/
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 

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