the same piece of XSL is unable to do that string compare
what are the symptoms? Does it say "I am unable to do this string compare",
or what?
<xsl:variable name="pdfdoctitle">
<xsl:value-of select="//Document/@url"/>
</xsl:variable>
Don't do this, it's very inefficient and sometimes means something different
from what you intended.
Do:
<xsl:variable name="pdfdoctitle" select="//Document/@url"/>
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Raghavan [mailto:raghavan479(_at_)yahoo(_dot_)com]
Sent: 05 April 2007 17:40
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Problem using variables with xpath
Apologize for the long mail
Am quite new to XSL and I am running into a strange problem.
I have 2 xml files
1) input.xml 2) metadata.xml
The xsl is applied on input.xml. The xsl extracts the data
corresponding to "url" attribute. This value is looked up
(using xpath) on the second xml
(metadata.xml) and extract the necessary values from metadaat.xml
I've attached the necessary source files. I constructed the
xsl using Stylus Studio (also tried
XMLspy) and xsl works as expected. Then I have this simple
Java code that performs XSL transformation and the same piece
of XSL is unable to do that string compare
Note:
During my unit testing
I replaced the following line with a static text and the
transformation worked as expected original:<xsl:for-each
select="$doc2node//doc[(_at_)id=$pdfdoctitle]">
modified:<xsl:for-each
select="$doc2node//doc[(_at_)id='http://www.something.com/path1/Doc
ument1.pdf']">
Since am new to XSL, am not sure if we can use variables in
XPath in first place!!!
Thanks,
-Raghav
--------------------------------------------------------------
---------------------------
Input XML
--------------------------------------------------------------
---------------------------
<?xml version="1.0" encoding="UTF-8"?>
<Content>
<Document Type="Web"
url="http://www.something.com/path1/Document1.pdf"/>
</Content>
--------------------------------------------------------------
---------------------------
My XSL
--------------------------------------------------------------
---------------------------
<?xml version='1.0' encoding='utf-8'?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="html"/>
<xsl:template match="/Content">
<xsl:variable name="pdfdoctitle">
<xsl:value-of select="//Document/@url"/>
</xsl:variable>
<xsl:variable name="doc2node"
select="document('metadata.xml')"/>
<html><head></head><body>
<p>
<!-- String compare scenatio 1
-->
<rr>
<xsl:for-each select="$doc2node//doc">
<xsl:if test="@id=$pdfdoctitle">
<xsl:value-of
select="@title" />
</xsl:if>
</xsl:for-each>
</rr>
<!-- String compare scenatio 2
-->
<rr2>
<xsl:for-each
select="$doc2node//doc[(_at_)id=$pdfdoctitle]">
<xsl:value-of select="@title"/>
</xsl:for-each>
<rr2>
<!-- Display value of pdfdoctitle -->
<rr3>
<xsl:value-of select="$pdfdoctitle"/>
</rr3>
</p>
</body></html>
</xsl:template>
</xsl:stylesheet>
--------------------------------------------------------------
---------------------------
metadata.xml file used in the XSL
--------------------------------------------------------------
---------------------------
<?xml version="1.0" encoding="UTF-8"?>
<documents>
<doc id="x" title="title for document x"
issuedate="12-Aug-2005" issuenumber="1" />
<doc id="z" title="This is document z title"
issuedate="1-Jan-2006" issuenumber="2" />
<doc id="y" title="This is document y title"
issuedate="10-Aug-2006" issuenumber="2" />
<doc
id="http://www.something.com/path1/Document1.pdf";
title="Title for something document"
issuedate="10-Aug-2005" issuenumber="22" /> </documents>
--------------------------------------------------------------
---------------------------
Transform.java
--------------------------------------------------------------
---------------------------
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.stream.StreamResult;
import java.io.*;
public class Transform {
/**
* Performs an XSLT transformation, sending the results
* to System.out.
*/
public static void main(String[] args) throws Exception {
if (args.length != 2) {
System.err.println(
"Usage: java Transform [xmlfile] [xsltfile]");
System.exit(1);
}
File xmlFile = new File(args[0]);
File xsltFile = new File(args[1]);
// JAXP reads data using the Source interface
Source xmlSource = new StreamSource(xmlFile);
Source xsltSource = new
StreamSource(xsltFile);
// the factory pattern supports different XSLT processors
TransformerFactory transFact =
TransformerFactory.newInstance();
Transformer trans =
transFact.newTransformer(xsltSource);
trans.transform(xmlSource, new
StreamResult(System.out));
}
}
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