Re: [xsl] Find a specific element or fall back to element 1

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Subject: Re: Find a specific element or fall back to element 1
From: Abel Braaksma <abel.online@xxxxxxxxx>
Date: Tue, 16 Jan 2007 00:06:39 +0100

John Horner wrote:

<xsl:variable name="gallery-xml-file"
select="document($gallery-xml-path)"/>
<xsl:variable name="test-position">
  <xsl:for-each select="$gallery-xml-file//image">
    <xsl:if test="@default='true'">
      <xsl:value-of select="position()"/>
    </xsl:if>
  </xsl:for-each>
</xsl:variable>
<xsl:variable name="display-position">
  <xsl:choose>
    <xsl:when test="$test-position = ''">1</xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$test-position"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>

This seems a bit long and wasteful to me. Is there a better way?

There are many ways that lead to Rome. It can be done very short in XSLT 2, but I guess you are using XSLT 1. Here's one way to tackle it, using only template matching, which will output the number "1" is there is no image with @default, and will print the position of the one with @default when there is one.

<xsl:template match="/"> pos2: <xsl:apply-templates select="$gallery-xml-file/gallery/image" /> </xsl:template> <xsl:template match="image[@default] | image[not(../image/@default)][1]"> <xsl:value-of select="position()" /> </xsl:template> <xsl:template match="image" />


Cheers,
-- Abel Braaksma
  http://www.nuntia.nl

Current Thread
Find a specific element or fall back to element 1 John Horner - 15 Jan 2007 22:50:11 -0000 Michael Kay - 15 Jan 2007 23:06:13 -0000 Abel Braaksma - 15 Jan 2007 23:10:19 -0000 Abel Braaksma - 15 Jan 2007 23:08:13 -0000 <= <Possible follow-ups> John Horner - 16 Jan 2007 02:24:07 -0000

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