XPath.evaluate(java.lang.String expression, java.lang.Object item, QName returnType) should throw XPathExpressionException when 'item' is null and expression refers to the context .

According to the spec :
 In XPath.evaluate(java.lang.String expression,java.lang.Object item,QName returnType) , a null value for item indicates that the expression should be evaluated without a context . In the absence of a context item, simple expressions, such as "1+1", can be evaluated . Any expression that refers to the context will throw an XPathExpressionException

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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 Test1.java
java Test1
Test1/checkXPath09() : OK : 3.0
Test1/checkXPath09() : Failed - expected XPathExpressionException not thrown ::

Testcase - Test1.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 org.w3c.dom.Document;

import java.io.File;


public class Test1 {
   
   Document document1 = null;
   
   Test1 () {}
    
    // main()
    public static void main(String[] argv) {
        Test1 test1 = new Test1();
        test1.checkXPath09();
    }
    // end main()

    // test for XPath.evaluate(java.lang.String expression, java.lang.Object item, QName returnType) , returnType is String
    // item is null , A null value for item indicates that the expression should be evaluated without a context.
    // In the absence of a context item, simple expressions, such as "1+1", can be evaluated.
    // Any expression that refers to the context will throw an XPathExpressionException
    private void checkXPath09() {
     try{
     XPathFactory xpathFactory = XPathFactory.newInstance();
     if( xpathFactory instanceof XPathFactory ){
     XPath xpath = xpathFactory.newXPath();
if ( xpath instanceof XPath ){
String expression1 = "1+2";
Double result = (Double)xpath.evaluate(expression1, document1, XPathConstants.NUMBER);
System.out.println("Test1/checkXPath09() : OK : "+result);
String expression2 = "/widgets/widget[@name='a']/@quantity" ;
String quantity = (String)xpath.evaluate(expression2, document1, XPathConstants.STRING);
System.out.println("Test1/checkXPath09() : Failed - expected XPathExpressionException not thrown :"+quantity+":");
}
     else{
     System.out.println("checkXPath09() failed - xpath not instance of XPath");
     }
     }else{
     System.out.println(" checkXPath09() failed - creating instance of XPathFactory ");
     }
     }catch(NullPointerException npe ){
     System.out.println(" checkXPathFactory09() - failed , NPE thrown ");
     }catch(XPathFactoryConfigurationException xpfce ){
     System.out.println(" checkXPathFactory09() - failed , Default object model not available ");
     }catch(XPathExpressionException xpee ){
     System.out.println(" checkXPathFactory09() - passed , expected XPathExpressionException thrown ");
     }catch(Exception e){
     System.out.println(" Exception thrown - checkXPath09() failed ");
     }
    }
}


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This bug is mostly fixed , now there are only a few contexts
which don't throw an exception (such as when the context is ".")

lowering the priority of this bug to a P4 given
that it currently is mostly fixed and this bug seems to deal
with just a corner case .