Name: rmT116609 Date: 02/12/2004


FULL PRODUCT VERSION :
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32c)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b32c, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
See attached code.

ERROR reported

java.lang.ClassNotFoundException: [Lde.gaskin.xml.test.EnDecodeBug1$Obj;
Continuing ...
java.lang.RuntimeException: failed to evaluate: <unbound>=Class.forName("[Lde.ga
skin.xml.test.EnDecodeBug1$Obj;");
Continuing ...

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
See comments in source code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
As with JDK1.4.X
ACTUAL -
The XMLEndoder produced file is incomplete

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.ClassNotFoundException: [Lde.gaskin.xml.test.EnDecodeBug1$Obj;
Continuing ...
java.lang.RuntimeException: failed to evaluate: <unbound>=Class.forName("[Lde.ga
skin.xml.test.EnDecodeBug1$Obj;");
Continuing ...

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package de.gaskin.xml.test;

import java.beans.XMLDecoder;
import java.beans.XMLEncoder;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

/** Demonstrate XMLEncoder/XMLDecoder BUG with arrays that have a dimension > 1
  in JDK1.5 beta1.
  Compile with 1.4.X or 1.5.
  Run with 1.4 OK.
  Run with 1.5 E R R O R.
  Usage:
     java de.gaskin.xml.test.EnDecodeBug1 [-nowrite] [filename]
     Default filename is "bug1.xml"
     No switch (-nowrite) writes with XMLEncoder and reads back the same file
        with XMLDecoder
     -nowrite only reads
  Tests:
    With 1.4.X
       - java de.gaskin.xml.test.EnDecodeBug1
       - Is OK and produces "bug1.xml" in current directory
    With 1.5.0 beta 1 RUN 1
       - java de.gaskin.xml.test.EnDecodeBug1 -nowrite
       - ERRORS reading in!!!!
    With 1.5.0 beta 1 RUN 2
       - java de.gaskin.xml.test.EnDecodeBug1 -nowrite
       - ERRORS writing out
*/

public class EnDecodeBug1 {
   Obj[] array;
   Obj[][] array2D;
   public EnDecodeBug1() {
   }
   public EnDecodeBug1(Obj[] array) {
      this.array = array;
   }
   public void setArray(Obj[] array) {
      this.array = array;
   }
   public Obj[] getArray() {
      return array;
   }
   public void setArray2D(Obj[][] array2D) {
      this.array2D = array2D;
   }
   public Obj[][] getArray2D() {
      return array2D;
   }
   public void encode(String filename) throws FileNotFoundException {
      XMLEncoder encoder = new XMLEncoder(new FileOutputStream(filename));
      encoder.writeObject(this);
      encoder.close();
   }
   public void list() {
      list(array, "");
      if (array2D != null) {
         int loopCnt = array2D.length;
         for (int i = 0;i < loopCnt;i++) {
            String prefix = "[" + i + "]";
            list(array2D[i], prefix);
         }
      }
      else {
         System.err.println("'array2D' is 'null' BUT SHOULD NOT BE NULL!!!");
      }
   }
   public void list(Obj[] array, String prefix) {
      if (array != null) {
         int loopCnt = array.length;
         for (int i = 0;i < loopCnt;i++) {
            System.err.println(prefix + array[i]);
         }
      }
   }
   public static EnDecodeBug1 decode(String filename)
   throws FileNotFoundException {
      XMLDecoder decoder = new XMLDecoder(new FileInputStream(filename));
      EnDecodeBug1 rc = (EnDecodeBug1)decoder.readObject();
      decoder.close();
      return rc;
   }
   public static class Obj {
      String attr;
      public Obj() {
      }
      public Obj(String attr) {
         this.attr = attr;
      }
      public void setAttr(String attr) {
         this.attr = attr;
      }
      public String getAttr() {
         return attr;
      }
      public String toString() {
         return attr;
      }
   }
   public static void main(String[] args) throws Exception {
      String filename = "bug1.xml";
      boolean write = true;
      if (args.length > 0) {
         if (args[0].charAt(0) == '-') {
            if (args[0].equals("-nowrite")) {
               write = false;
               if (args.length > 1) {
                  filename = args[1];
               }
            }
            else {
               System.err.println("Only known switch is '-nowrite' ABORT");
               System.exit(-1);
            }
         }
         else {
            filename = args[0];
         }
      }
      if (write) {
         Obj[] array = new Obj[2];
         array[0] = new Obj("one");
         array[1] = new Obj("two");
         Obj[][] array2D = {
            array,
         };
         EnDecodeBug1 test = new EnDecodeBug1(array);
         test.setArray2D(array2D);
         test.encode(filename); ;
         test.list();
      }

      System.err.println("And now read back");
      EnDecodeBug1 test1 = EnDecodeBug1.decode(filename);
      test1.list();
   }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Don't use multidimensional arrays with XMLEncoder/XMLDecoder

Release Regression From : 1.4.2
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Incident Review ID: 237793)
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