Name: avC70361 Date: 06/04/99



  java.io.FilePermission is incorrectly deserialized in kestrel when has been serialized in jdk1.2.
The exception "java.io.InvalidClassException: java.io.FilePermission; Local class not compatible:
stream classdesc serialVersionUID=7930732926638008763 local class serialVersionUID=-6327574901970006797" is
thrown.

Here is a test demonstrating the bug.
-------------FilePermissionTest.java---------
import java.io.*;

public class FilePermissionTest {

  public static void main(String args[]) {

    FilePermission filePermission;

    String filepath = "FilePermission.ser";

    if (args[0].equals("write")) {

      filePermission = new FilePermission("path", "read");

      ObjectOutputStream stream = null;

      try {

        stream = new ObjectOutputStream(new FileOutputStream(filepath));
        stream.writeObject(filePermission);
        stream.close();

      } catch(IOException e) {
        System.out.println("Couldn't write to " + filepath + " : " + e);
        System.exit(1);
      }

      System.out.println("FilePermission written successfully");

    } else if (args[0].equals("read")) {

      ObjectInputStream stream = null;

      try {

        stream = new ObjectInputStream(new FileInputStream(filepath));
        filePermission = (FilePermission)stream.readObject();

      } catch(InvalidClassException e) {
        System.out.println("Failed:" + e);
        System.exit(1);
      } catch(Exception e) {
        System.out.println(
          "Failed: couldn't read from" + filepath + " : " + e
        );
        System.exit(1);
      }

      System.out.println("Passed");

    }

    System.exit(0);

  }

}
-----------The test output---------
jdk 1.2:

<avv@mizar(pts/3).367> java -version
java version "1.2"
Classic VM (build JDK-1.2-V, green threads, sunwjit)
<avv@mizar(pts/3).368> java FilePermissionTest write
FilePermission written successfully
<avv@mizar(pts/3).369> java FilePermissionTest read
Passed

Kestrel:

<avv@mizar(pts/3).371> java FilePermissionTest read
Failed:java.io.InvalidClassException: java.io.FilePermission; Local class not compatible: stream classdesc serialVersionUID=7930732926638008763 local class serialVersionUID=-6327574901970006797

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