Name: inR10064 Date: 12/18/2000



  The implementation of the method org.w3c.dom.Node.isSupported(String feature, String version) throws
java.lang.NullPointerException if feature = "xml" and version = null (See test.java below).

  Definition of the method in p. 1.2 "Fundamental Interfaces" of DOM Level 2 Core
(http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-1950641247) reads:

  " isSupported introduced in DOM Level 2
        ...
        Parameters
        ...
          version of type DOMString
            This is the version number of the feature to test. In Level 2, version 1, this is the string
            "2.0". If the version is not specified, supporting any version of the feature will cause the
            method to return true. "
            
  This bug is found in builds jaxp-1.1ea2-b12, jaxp-1.1ea2-b13, jaxp-1.1ea2-b14,
jaxp-1.1ea2-b15 and affects the new test in TCK JAXP 1.1:

api/org_w3c_dom/Node/IsSupportedTests.html#supportsTest02

------------------------------------test.java-----------------------------
import org.w3c.dom.Document;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;

public class test {
    
    public static void main(String argv[]) {
        
        try {
            java.util.Locale.setDefault(java.util.Locale.US);
            
            DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance()
                                              .newDocumentBuilder();

            Document document = documentBuilder.newDocument();

            document.isSupported("xml", null);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
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% java -showversion -cp .:jaxp1.1ea/jaxp.jar:jaxp1.1ea/crimson.jar test
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, interpreted mode)

java.lang.NullPointerException
        at org.apache.crimson.tree.DOMImplementationImpl.hasFeature0(DOMImplementationImpl.java:97)
        at org.apache.crimson.tree.NodeBase.isSupported(NodeBase.java:362)
        at test.main(test.java:17)
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