Problem calling external java method

[Chris Bare]

Help!

I keep getting a NoSuchMethodException while trying to call a java
extention function using Xalan-j 2.7.0. It seems that calling static
java methods works, but calling nonstatic methods seems to be broken.

I've included an easy way to reproduce the problem here. The commented
out template calls a static function on the class Helper. It works. The
other template calls a nonstatic method and it barfs giving this
message:
NoSuchMethodException: For extension function, could not find method
static xsltest.Helper.square([ExpressionContext,] #UNKNOWN
(xsltest.Helper), #NODESET)

Maybe I'm doing something wrong. I'm trying to follow the instructions
here:
http://xml.apache.org/xalan-j/extensions_xsltc.html

My questions are:
  Am I doing something totally bass-ackwards?
  Is this a Xalan bug?
  Is there already a bug report filed?
  (I looked in Jira and found old closed bugs [Bug 1501], but none for
2.7.0.)



-- test.xsl ----------------------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                xmlns:java="http://xml.apache.org/xalan/java";
                                version="1.0">

        <xsl:output method="xml"/>
        <xsl:variable name="helper" select="java:xsltest.Helper.new()"/>

        <xsl:template match="/">
          <foobar>
            <xsl:apply-templates select="/xsltest"/>
          </foobar>
        </xsl:template>

        <xsl:template match="number">
          <number>
            <xsl:variable name="num" select="@value"/>
            <xsl:attribute name="square"><xsl:value-of
select="java:xsltest.Helper.square($helper,$num)"/></xsl:attribute>
          </number>
        </xsl:template>

<!-- 
        <xsl:template match="number">
          <number>
            <xsl:variable name="num" select="@value"/>
            <xsl:attribute name="square"><xsl:value-of
select="java:xsltest.Helper.staticSquare($num)"/></xsl:attribute>
          </number>
        </xsl:template>
-->

</xsl:stylesheet>


-- Helper.java -------------------------------------------------

package xsltest;

public class Helper {

    public static int staticSquare(int n) {
        return n * n;
    }

    public int square(int n) {
        return n * n;
    }
}

-- MyXml.xml ---------------------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<xsltest>
        <number value="3"/>
        <number value="17"/>
</xsltest>



Here's the command line:

> java -cp
./classes;./lib/xml-apis.jar;./lib/serializer.jar;./lib/xercesImpl.jar;.
/lib/xalan.jar;./lib/log4j-1.2.12.jar
org.apache.xalan.xslt.Process -IN ./src/xsltest/MyXml.xml -XSL
./src/xsltest/test.xsl

Here's the error msg:

(Location of error unknown)XSLT Error
(javax.xml.transform.TransformerException):
java.lang.NoSuchMethodException: For extension function, could not find
method static xsltest.Helper.square([ExpressionContext,] #UNKNOWN
(xsltest.Helper), #NODESET).
Exception in thread "main" java.lang.RuntimeException:
java.lang.NoSuchMethodException: For extension function, could not find
method static xsltest.Helper.square([ExpressionContext,] #UNKNOWN
(xsltest.Helper), #NODESET).
        at org.apache.xalan.xslt.Process.doExit(Process.java:1153)
        at org.apache.xalan.xslt.Process.main(Process.java:1126)


org.apache.xalan.xslt.EnvironmentCheck gives me:

[...]
version.xerces2=Xerces-J 2.7.1
version.xerces1=not-present
version.xalan2_2=Xalan Java 2.7.0
version.xalan1=not-present
version.ant=not-present
java.version=1.5.0_05
version.DOM=2.0
version.crimson=not-present
[...]
version.SAX=2.0
version.xalan2x=Xalan Java 2.7.0
[...]



-- thanks!!!