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Setting two variables from the result of a "complex" test
- To: "'xsl-list at lists dot mulberrytech dot com'" <xsl-list at lists dot mulberrytech dot com>
- Subject: [xsl] Setting two variables from the result of a "complex" test
- From: "MacEwan, James (Information Services)" <James dot MacEwan at investorsgroup dot com>
- Date: Wed, 1 Aug 2001 16:06:13 -0500
- Reply-To: xsl-list at lists dot mulberrytech dot com
Hi,
{This started out as a question, but I think I solved my own problem.
Because I had to think about it for a bit and because there might be
something else that I have realized, I've decided to post it anyways.}
I have been contemplating how to make a more efficient solution to a problem
that is similar to the one below. (I have simplified my code a lot.)
In the BUTTON template that you see below, I am setting two variables based
on the result of a test. The test that I have given in my example below is
"$Language = 2" (for arguments sake, assume this test is computationally
significant). As you can see I need to perform this test twice, once for
setting each variable. Since this test is "expensive", I would rather only
do it once.
Remaining new to XSL my questions are:
1- Is the basic design of the BUTTON template okay? Based on the XSL
Frequently Asked Questions site, I am instructed to do
"<xsl:variable><xsl:choose>..." for each variable (instead of
"<xsl:choose>set each variable inside the choose"). Have I got this right?
2- Assuming that I have got it right, my solution is to create a third
variable say "TestResult" that contains the result of the computationally
expensive calculation and put the setting of TestResult before the other two
variables in the template. Does this make good sense?
3 - I am sure that some uber XSLers might come up with some instances where
this idea might not work (some nasty tree fragment or something) -- if that
is the case, I wouldn't mind going along for the ride while it is discussed.
Thanks a bunch,
J.
XML - - - -
<?xml version="1.0" encoding="UTF-8"?>
<MENU>
<BUTTON>
<ENGLISH_URL>http://www.dpawson.co.uk/xsl/xslfaq.html</ENGLISH_URL>
<ENGLISH_TEXT>XSL Frequently Asked Questions</ENGLISH_TEXT>
<FRENCH_URL>http://www.fakeFrenchURL.fr/xsl/xslfaq.html</FRENCH_URL>
<!-- Please excuse my French -->
<FRENCH_TEXT>Des questions frequémment posé sur
XSL</FRENCH_TEXT>
</BUTTON>
</MENU>
XSL - - - -
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:fo="http://www.w3.org/1999/XSL/Format";>
<xsl:output method="html"/>
<!-- Global parameters -->
<!-- Assume English(1) language if none is specified -->
<xsl:param name="Language" select="1"/>
<xsl:template match="/">
<html>
<body>
<xsl:apply-templates/>
</body>
</html>
</xsl:template>
<xsl:template match="BUTTON">
<xsl:variable name="URL">
<xsl:choose>
<xsl:when test="$Language = 2">
<!-- French -->
<xsl:value-of
select="FRENCH_URL/text()"/>
</xsl:when>
<xsl:otherwise>
<!-- English -->
<xsl:value-of
select="ENGLISH_URL/text()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="LinkName">
<xsl:choose>
<xsl:when test="$Language = 2">
<!-- French -->
<xsl:value-of
select="FRENCH_TEXT/text()"/>
</xsl:when>
<xsl:otherwise>
<!-- English -->
<xsl:value-of
select="ENGLISH_TEXT/text()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:element name="a">
<xsl:attribute name="href">
<xsl:value-of select="$URL"/>
</xsl:attribute>
<xsl:value-of select="$LinkName"/>
</xsl:element>
<br/>
</xsl:template>
</xsl:stylesheet>
James MacEwan
Software Developer
Investors Group Inc.
mailto:James.MacEwan@investorsgroup.com
v: (204) 956-8515
f: (204) 943-3540
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