[xml-dev] calling java function from xsl throws NullPointerException

[Haresh Gujarathi <gharesh@vsnl.com>]

Hi,

I need some help in identifying cause of the following exception.
Hope somebody can give me some clue...thanks in advance.

regards
Haresh


I am trying to call a java function from xsl;

a.
I have added
xmlns:java_func="XSLUtil" extension-element-prefixes="java_func"
in <xsl:stylesheet>

b.
I have added
<lxslt:component prefix="java_func" functions="processSearchPagesLinks">
	<lxslt:script lang="javaclass" src="xalan://com.emantra.util.XSLUtil"/>
</lxslt:component>

c.
I am trying to call a java function as follows;
<xsl:value-of select="java_func:processSearchPagesLinks('aaaaa')" />

d. I have the XSLUtil class in the path. The xsl transformation code  is in
JSP

e. I am using
Xalan-Java 2.0.D07

f.
Following is the stack trace I get.

javax.xml.transform.TransformerException: TRaX Transform Throwable at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.j
ava:1175) at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:2811)
at java.lang.Thread.run(Thread.java:484) ---------
java.lang.NullPointerException at
org.apache.xalan.templates.ElemValueOf.execute(ElemValueOf.java:252) at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2083) at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:
711) at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2083) at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:
711) at
org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.ja
va:495) at
org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.jav
a:193) at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2083) at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:
711) at
org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.ja
va:495) at
org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.jav
a:193) at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2083) at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:
711) at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2083) at
org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:
711) at
org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Transform
erImpl.java:2083) at
org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transformer
Impl.java:1981) at
org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.j
ava:1151) at
org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:2811)
at java.lang.Thread.run(Thread.java:484)