[XALANJ-1159] Null Pointer Exception for included stylesheet that has unbounded extension prefix

• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Affects Version/s: 2.4Dx
• Component/s: transformation, Xalan-interpretive
• Environment: Operating System: Other; Platform: PC
• Bugzilla Id: 12127
• Assignee: Morris Kwan
• Reporter: myquestions
• Created: 28/Aug/02 22:20
• Updated: 24/Sep/04 19:58
• Resolved: 24/Sep/04 19:58

Description

In a specific configuration of stylesheets (which I can only describe by
including below), a NullPointerException is thrown.

Particularly, I have an included stylesheet called subpage.xsl whose stylesheet
tag has the attribute extension-element-prefixes="someprefix". someprefix is
not already declared as a namespace.

When I remove the xmlns:html attribute from the subpage.xsl stylesheet tag, the
null pointer exception goes away.

I do not understand the following bugs, so I cannot tell if they are duplicates.
But these bugs sound like they are similar:
Bug 11792
Bug 9683

I am using JDK1.3.0_02 on WindowsMe, using Xalan 2.4D1
The command was:
"%JAVAHOME%\bin\java.exe" -classpath "%XALANCLASSPATH%"
org.apache.xalan.xslt.Process -IN file.xml -XSL toppage.xsl -out result.xml

+++++++++++++++++
toppage.xsl:

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0"
>

<xsl:include href="subpage.xsl"/>

</xsl:stylesheet>

+++++++++++++++++

subpage.xsl

<?xml version="1.0"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:html="http://www.w3.org/TR/REC-html40"
version="1.0"
extension-element-prefixes="someprefix">

</xsl:stylesheet>

+++++++++++

file.xml

<?xml version="1.0" encoding="UTF-8"?>
<thetag/>

+++++++++++

Exception message:

(Location of error unknown)XSLT Error (javax.xml.transform.TransformerConfigurat
ionException): javax.xml.transform.TransformerException: java.lang.NullPointerEx
ception