XPath.evaluate(java.lang.String expression, java.lang.Object item, QName returnType) should throw IllegalArgumentException if returnType is not one of the types defined in XPathConstants .

According to the spec , If returnType is not one of the types defined in XPathConstants, then an IllegalArgumentException is thrown.
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java -version
java version "1.5.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b37)
Java HotSpot(TM) Client VM (build 1.5.0-beta2-b37, mixed mode)
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javac Test2.java
java Test2
checkXPath13() failed , expected IAE not thrown
Quantity : null

Test2.java & widgets.xml attached
------------------ widgets.xml ---------------------
<?xml version="1.0" standalone="yes"?>
<widgets>
<widget name="a" style="red" quantity="6"/>
<widget name="b" style="blue"/>
<widget name="c">
<style>green</style>
</widget>
</widgets>
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Testcase - Test2.java
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import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactoryConfigurationException;
import javax.xml.xpath.XPathExpressionException;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;

import javax.xml.namespace.QName;
import javax.xml.XMLConstants;

import org.w3c.dom.Document;

import java.io.File;


public class Test2 {
   
   DocumentBuilderFactory dbf = null;
   DocumentBuilder builder = null;
   Document document = null;
   String xmlPath = "./";
   File file1 = null;
   public static final javax.xml.namespace.QName qname = new QName( XMLConstants.XML_NS_URI , "" );

   Test2 () {}
    
    // main()
    public static void main(String[] argv) {
        Test2 test2 = new Test2();
        test2.init();
        test2.checkXPath13();
    }
    // end main()

    // initializing
    private void init(){
        try {
            file1 = new File(xmlPath+"widgets.xml");
            dbf = DocumentBuilderFactory.newInstance();
            builder = dbf.newDocumentBuilder();
            document = builder.parse(file1);
            
        }catch (Exception e) {
          System.out.println(" Exception thrown in XPath01/init() - Test failed");
        }
    }
    
    // test for XPath.evaluate(java.lang.String expression, java.lang.Object item, QName returnType)
    // if returnType is not one of the types defined in XPathConstants , should throw IllegalArgumentException
    private void checkXPath13() {
     try{
     XPathFactory xpathFactory = XPathFactory.newInstance();
     if( xpathFactory instanceof XPathFactory ){
     XPath xpath = xpathFactory.newXPath();
if ( xpath instanceof XPath ){
String expression = "/widgets/widget[@name='a']/@quantity";
String quantity = (String) xpath.evaluate(expression,document,qname);
System.out.println("checkXPath13() failed , expected IAE not thrown ");
System.out.println("Quantity : "+quantity);
}
     else{
     System.out.println("checkXPath13() failed - xpath not instance of XPath");
     }
     }else{
     System.out.println(" checkXPath13() failed - creating instance of XPathFactory ");
     }
     }catch(IllegalArgumentException iae ){
     System.out.println(" checkXPathFactory13() - passed , expected IAE thrown ");
     }catch(XPathFactoryConfigurationException xpfce ){
     System.out.println(" checkXPathFactory13() - failed , Default object model not available ");
     }catch(XPathExpressionException xpee ){
     System.out.println(" checkXPathFactory13() - failed , XPathExpressionException thrown ");
     }catch(Exception e){
     System.out.println(" Exception thrown - checkXPath13() failed ");
     }
    }
    
}
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