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Re: [xsl] Evaluating condition strings


Subject: Re: [xsl] Evaluating condition strings
From: David Carlisle <davidc@xxxxxxxxx>
Date: Sat, 28 Apr 2007 21:45:03 +0100

  <if condition="var1 = true or var2 < 5 and var3 = 'ok'">

That isn;t well formed, i assume it is

<if condition="var1 = true or var2 &lt; 5 and var3 = 'ok'">

> Could it be done with pure XSLT? What approach would you recommend?


You can probbaly do it in two passes, deoending on how complicated your
expression language is, it may or may not be easy to transform from


<if condition="var1 = true or var2 &lt; 5 and var3 = 'ok'">
  <then>
      text
  </then>
  <else>
     another text
  </else>
</if>

the variables are available in another XML doc:
<attributes>
  <variable name="var1">false</variable>
  <variable name="var2">4</variable>
  <variable name="var3">ok</variable>
</attributes>


to

<xsl:choose>
<xsl:when test="$var1 = 'true' or $var2 &lt; 5 and $var3 = 'ok'">
  <xs>
      text
  </then>
  <xsl:otherwise>
     another text
  </xsl:otherwise>
</xsl:choose>>

  <xsl:variable name="var1">false</xsl:variable>
  <xsl:variable name="var2">4</xsl:variable>
  <xsl:variable name="var3">ok</xsl:variable>

Then execute the generated stylesheet


David

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