Name: avC70361 Date: 03/30/98



  While a java.text.Collator instance is deserialized an unexpected
java.lang.Error is thrown from the java.io.ObjectInputStream.invokeObjectReader
method. The bug appears only when the Collator instance serialized has the
Collator.FULL_DECOMPOSITION mode set and only when using Reflection API. Without
using Reflection API the deserialization works correctly.

Here is the test demonstrating the bug.
--------------------ObjectInputStreamTest.java--------------
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Method;
import java.text.Collator;
import java.util.Locale;

public class ObjectInputStreamTest {

  public void testWrite() {
    try {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      ObjectOutputStream ostream = new ObjectOutputStream(baos);

      Collator collator = Collator.getInstance(Locale.US);
      collator.setDecomposition(Collator.FULL_DECOMPOSITION);
      ostream.writeObject(collator);
      ostream.flush();
      baos.close();

      ObjectInputStream istream = new ObjectInputStream(
        new ByteArrayInputStream(baos.toByteArray())
      );

      istream.readObject();

      System.out.println("Test passed");

    } catch(Throwable e) {
      System.out.println("Test failed");
      e.printStackTrace();
    }
  }

  public static void main(String args[]) {
    ObjectInputStreamTest test = new ObjectInputStreamTest();
    try {
      Method method = ObjectInputStreamTest.class.getDeclaredMethod("testWrite", new Class[] {});
      method.invoke(test, new Object[] {});
    } catch(Throwable e) {
      System.out.println("Test failed");
      e.printStackTrace();
    }
  }

}
-------------The test output----------
> java ObjectInputStreamTest
Test failed
java.lang.Error: interal error
        at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:1697)
        at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1148)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:374)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:233)
        at ObjectInputStreamTest.testWrite(ObjectInputStreamTest.java:26)
        at java.lang.reflect.Method.invoke(Native Method)
        at ObjectInputStreamTest.main(ObjectInputStreamTest.java:40)

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