EventSetDescriptor should test for null listenerMethodName string

Name: dsC58869 Date: 08/15/97



EventSetDescriptor(Class,String,Class,String listenerMethodNames[],String,String)
works wrong when one of the listenerMethodNames elements is null.

It creates an EventSetDescriptor object but a call to
getListenerMethodDescriptors() results in NullPointerException.

This constructor should either throw a NullPointerException or
ignore null listenerMethodNames elements.

Other constructors work the same way.

==== Here is the test demonstrating the bug ====
 import java.beans.*;
 import java.lang.reflect.*;
 import java.awt.event.ActionListener;

 class SourceClass {
    public void addActionListener(ActionListener foo) {
    }

    public void removeActionListener(ActionListener foo) {
    }
  }

  class Listener {
    public void action(java.util.EventObject e) {};
    public void event(java.util.EventObject e) {};
    public void dummy(java.util.EventObject e) {};
  }

 public class Test1 {
     public static void main(String[] args){
        Class souceClass = SourceClass.class;
        String eventSetName = "action";
        Class listenerType = Listener.class;
        String listenerMethods[] = {"action","event",null,"dummy"};
        String addListenerMethodName = "addActionListener";
        String removeListenerMethodName = "removeActionListener";
        EventSetDescriptor esd;
try{
          esd = new EventSetDescriptor(souceClass,
                         eventSetName, listenerType, listenerMethods,
                         addListenerMethodName,removeListenerMethodName);
} catch (IntrospectionException ie) {
            System.out.println(ie);
            return;
        }
        try{
           MethodDescriptor[] mds = esd.getListenerMethodDescriptors();
        } catch (NullPointerException npe) {
             npe.printStackTrace();
        }
     }
 }
 
==== Here is the output of the test ====

%java Test1
java.lang.NullPointerException
at java.beans.MethodDescriptor.<init>(MethodDescriptor.java:39)
at java.beans.EventSetDescriptor.getListenerMethodDescriptors(EventSetDescriptor.java:217)
at Test1.main(Test1.java:37)


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