java.io.ObjectStreamClass.lookup() throws NPE on interface class

Name: ooR10001 Date: 01/05/2001


java.io.ObjectStreamClass.lookup(Class) method throws NullPointerException when
the atempt to lookup ObjectStreamClass for serializable interface is made.
It is the compatibility problem because in previous jdk version
NPE is not thrown in this case. It needs to be fixed.

This is a sample to reproduce this bug:
-----------------------------------------
interface sample extends java.io.Serializable {
}

public class test {

  public static void main(String[] args) {
      Class c = sample.class;
      if (c == null) {
          System.out.println("null parameter passed");
      }
      java.io.ObjectStreamClass streamClass =
              java.io.ObjectStreamClass.lookup(c);
      System.out.println("OKAY");
  }

}
-------------------------------------------

Output:
%java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b46)
Java HotSpot(TM) Client VM (build 1.4beta-B45, mixed mode)
%java test
Exception in thread "main" java.lang.NullPointerException
        at java.lang.Class.isAssignableFrom(Native Method)
        at sun.misc.ClassReflector.getSerializableConstructor(ClassReflector.java:1181)
        at sun.misc.ClassReflector.getInvocables(ClassReflector.java:1143)
        at sun.misc.ClassReflector.access$900(ClassReflector.java:27)
        at sun.misc.ClassReflector$2.run(ClassReflector.java:1058)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.misc.ClassReflector.createClassReflector(ClassReflector.java:1055)
        at sun.misc.ClassReflector.getClassReflector(ClassReflector.java:1043)
        at sun.misc.ClassReflector.access$100(ClassReflector.java:27)
        at sun.misc.ClassReflector$Factory.getClassReflector(ClassReflector.java:87)
        at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:237)
        at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:226)
        at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:103)
        at test.main(test.java:11)
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