[XALANJ-1047] NullPointerException when invoking function via xalan://FQCN

• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Affects Version/s: 2.3
• Component/s: Xalan-extensions
• Environment: Operating System: Linux; Platform: Other
• Bugzilla Id: 9683
• Assignee: Morris Kwan
• Reporter: Simon Kitching
• Created: 07/Jun/02 11:45
• Updated: 02/Sep/04 21:19
• Resolved: 02/Sep/04 21:19

Description

When passing a node reference to an extension function where the extension
function is declared using a namespace prefix, a null pointer exception occurs.

When passing the same node to the same function using a java:FQCN prefix there
is no problem. Neither is there a problem when passing a literal to the function.

In the following stylesheet, the first 5 calls to static method toUpper work;
only the 6th fails.

<?xml version="1.0"?>
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:java="http://xml.apache.org/xslt/java"
xmlns:ecn="xalan://nz.co.ecnetwork.xsltmap.Extensions"
version="1.0">

<!-- Interchange Sender ID -->
<xsl:param name="literalVar" select="'literal-var'"/>
<xsl:param name="nodeVar">some-value</xsl:param>

<xsl:template match="/">
<xsl:value-of
select="java:nz.co.ecnetwork.xsltmap.Extensions.toUpper('literal')"/>
<xsl:value-of
select="java:nz.co.ecnetwork.xsltmap.Extensions.toUpper($literalVar)"/>
<xsl:value-of
select="java:nz.co.ecnetwork.xsltmap.Extensions.toUpper($nodeVar)"/>
<xsl:value-of select="ecn:toUpper('literal')"/>
<xsl:value-of select="ecn:toUpper($literalVar)"/>
<xsl:value-of select="ecn:toUpper($nodeVar)"/>
</xsl:template>
</xsl:stylesheet>

extension class:
package nz.co.ecnetwork.xsltmap;

public class Extensions
{
/**

• Convert input string to upper-case : test for Xalan-J bug
  */
  public static String toUpper(String str) { return str.toUpperCase(); }

  }