[xsl] reposting.extension library question

Subject: [xsl] reposting.extension library question
From: "william locksman" <vsd18@xxxxxxxxxxxxxx>
Date: 15 May 2002 14:53:14 -0000
hello , sorry to repost this question..
i did not get a response for my question. can some one please answer me??

hello i have a question regarding using the extension library
function ussage.
i have seen articles that use the toUpperCase of String method in
the following way.
for xml

<color>green and pink</color>

using the java's to upper case, the xsl would be

<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xalan = "http://xml.apache.org/xalan";
exclude-result-prefixes="xalan" xmlns:java = "java">
<xsl:template match="/">
<xsl:for-each select="/colors/color">
<xsl:variable name="color" select="java:lang.String.new(.)"/>
from java: <xsl:value-of select="java:toUpperCase($color)"/>

where we instantiate the String object by saying
java:lang.String.new()  and then call the toUpperCase Method on
that string. thaz fine.

I have then formed my own utility class that returns the string in
the uppercase( just for test purpose ). This Class is StrUtils
which has a method called upperCase()that takes the String to be
converted to the uppercase and returns String in uppercase.
( I am doing this purely for test purpose)
and i am calling this method in the following way in my XSL

<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xalan = "http://xml.apache.org/xalan";
xmlns:str-utils = "com.xyz.StrUtils" extension-element-prefixes
="str-utils" >
<xsl:template match="/">
<xsl:for-each select="/colors/color">
<xsl:variable name="color" select="."/>
<xsl:value-of select="str-utils:upperCase($color)"/>

This works fine too. My question is that in my Example, where is
the instantiation being done?? I have not done anything like
com.xyz.StrUtils.new()... so how is it working??
what is the theory behind the object instantiation when it comes
to extension libraries??

The StrUtils Class is as follows

public class StrUtils {

     *  Constructor for the StringUtils object
    public StringUtils() { }

    public String upperCase(String str) {
        return "str.toUpperCase() "+str.toUpperCase();

i would be thankful if someone can please tell me about this.

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