Name: ooR10001 Date: 04/17/2000


If java.util.TreeMap object created by constructor with java.util.Collator
parameter, and parameter will not implements java.io.Serializable, the object is
no longer serializable.
Object's field 'comparator' is initialized with non-Serializable class
instance of java.util.Comparator, which implements java.util.Collator.
This is causing the problem.
 
The test example to reproduce the bug:
-------------------------------------------------------------
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class test {

  public static void main(String[] args) {
    try {
        java.util.TreeMap obj =
            new java.util.TreeMap(java.text.Collator.getInstance(
                    new java.util.Locale("en", "US", "")));

        FileOutputStream ostream = new FileOutputStream("gold.tmp");
        ObjectOutputStream objos = new ObjectOutputStream(ostream);
        objos.writeObject(obj);
        objos.close();

    } catch (java.io.IOException e) {
        e.printStackTrace();
    }
  }

}
-------------------------------------------------------------
Test output:

java.io.NotSerializableException: java.text.RuleBasedCollator
        at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:1148)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:366)
        at
java.io.ObjectOutputStream.outputClassFields(ObjectOutputStream.java:1841)
        at
java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:480)
        at java.util.TreeMap.writeObject(TreeMap.java:1491)
        at java.lang.reflect.Method.invoke(Native Method)
        at
java.io.ObjectOutputStream.invokeObjectWriter(ObjectOutputStream.java:1878)
        at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:1210)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:366)
        at test.main(test.java:14)
-------------------------------------------------------------

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