JDK regression: java.beans.Introspector.getBeanInfo(Class) works incorrectly

Name: dsR10051 Date: 08/07/2001


This bug is JDK regression that has been introduced in merlin-beta2.
The method of class java.beans.Introspector:
public static BeanInfo getBeanInfo(Class beanClass)
                            throws IntrospectionException
could incorrectly find out the IndexedPropertyDescriptors
of the bean under introspection. This happens when
the bean declares indexed the read/write-only property access method
and super class of the bean declares non-indexed property access methods.

Here is minimized test:
--- Argle.java ---
public class Argle {

    public String[] getFred() {
        return null;
    }
}
--- Bargle.java ---
public class Bargle extends Argle {

    public String getFred(int index) {
        return null;
    }
}
--- IntrospectorTest04.java ---
import java.beans.*;

public class IntrospectorTest04 {

    public static void main (String[] args) {
      try {
        BeanInfo bi = Introspector.getBeanInfo(Bargle.class);
        PropertyDescriptor[] pds = bi.getPropertyDescriptors();
        for (int i = 0; i < pds.length; i++) {
            String name = pds[i].getName();
            System.out.println(name + " instanceof IndexedPropertyDescriptor = " +
                (pds[i] instanceof IndexedPropertyDescriptor));
            System.out.println(name + " propertyType = " + pds[i].getPropertyType());
            System.out.println(name + " setter = " + pds[i].getWriteMethod());
            System.out.println(name + " getter = " + pds[i].getReadMethod());
            if (pds[i] instanceof IndexedPropertyDescriptor) {
                IndexedPropertyDescriptor ipd = (IndexedPropertyDescriptor)pds[i];
                System.out.println(name + " indxed setter = " + ipd.getIndexedWriteMethod());
                System.out.println(name + " indxed getter = " + ipd.getIndexedReadMethod());
            } else {
                if (name.equals("fred")) {
                    System.out.println("FAILED: fred should be indexed property");
                }
            }
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
}
--- Output ---
%/set/jdk-builds/JDK1.4.0beta-b74/solaris/bin/java IntrospectorTest04
class instanceof IndexedPropertyDescriptor = false
class propertyType = class java.lang.Class
class setter = null
class getter = public final native java.lang.Class java.lang.Object.getClass()
fred instanceof IndexedPropertyDescriptor = false
fred propertyType = class [Ljava.lang.String;
fred setter = null
fred getter = public java.lang.String[] Argle.getFred()
FAILED: fred should be indexed property

--- Output for JDK1.4.0beta-b65 ---
%/set/jdk-builds/JDK1.4.0beta-b65/solaris/bin/java IntrospectorTest04
class instanceof IndexedPropertyDescriptor = false
class propertyType = class java.lang.Class
class setter = null
class getter = public final native java.lang.Class java.lang.Object.getClass()
fred instanceof IndexedPropertyDescriptor = true
fred propertyType = class [Ljava.lang.String;
fred setter = null
fred getter = public java.lang.String[] Argle.getFred()
fred indxed setter = null
fred indxed getter = public java.lang.String Bargle.getFred(int)

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