553     private void readObject(ObjectInputStream s)
 554             throws IOException, ClassNotFoundException {
 555 
 556         ObjectInputStream.GetField fields = s.readFields();
 557         byte[] tmp = (byte[])fields.get("buf", null);
 558         if (tmp == null)
 559             throw new InvalidObjectException("buf is null and should not be!");
 560         buf = tmp.clone();
 561         len = fields.get("len", 0L);
 562         if (buf.length != len)
 563             throw new InvalidObjectException("buf is not the expected size");
 564         origLen = fields.get("origLen", 0L);
 565         blob = (Blob) fields.get("blob", null);
 566     }
 567 
 568     /**
 569      * writeObject is called to save the state of the SerialBlob
 570      * to a stream.
 571      */
 572     private void writeObject(ObjectOutputStream s)
 573             throws IOException, ClassNotFoundException {
 574 
 575         ObjectOutputStream.PutField fields = s.putFields();
 576         fields.put("buf", buf);
 577         fields.put("len", len);
 578         fields.put("origLen", origLen);
 579         // Note: this check to see if it is an instance of Serializable
 580         // is for backwards compatibility
 581         fields.put("blob", blob instanceof Serializable ? blob : null);
 582         s.writeFields();
 583     }
 584 
 585     /**
 586      * Check to see if this object had previously had its {@code free} method
 587      * called
 588      *
 589      * @throws SerialException
 590      */
 591     private void isValid() throws SerialException {
 592         if (buf == null) {
 593             throw new SerialException("Error: You cannot call a method on a " +

 553     private void readObject(ObjectInputStream s)
 554             throws IOException, ClassNotFoundException {
 555 
 556         ObjectInputStream.GetField fields = s.readFields();
 557         byte[] tmp = (byte[])fields.get("buf", null);
 558         if (tmp == null)
 559             throw new InvalidObjectException("buf is null and should not be!");
 560         buf = tmp.clone();
 561         len = fields.get("len", 0L);
 562         if (buf.length != len)
 563             throw new InvalidObjectException("buf is not the expected size");
 564         origLen = fields.get("origLen", 0L);
 565         blob = (Blob) fields.get("blob", null);
 566     }
 567 
 568     /**
 569      * writeObject is called to save the state of the SerialBlob
 570      * to a stream.
 571      */
 572     private void writeObject(ObjectOutputStream s)
 573             throws IOException {
 574 
 575         ObjectOutputStream.PutField fields = s.putFields();
 576         fields.put("buf", buf);
 577         fields.put("len", len);
 578         fields.put("origLen", origLen);
 579         // Note: this check to see if it is an instance of Serializable
 580         // is for backwards compatibility
 581         fields.put("blob", blob instanceof Serializable ? blob : null);
 582         s.writeFields();
 583     }
 584 
 585     /**
 586      * Check to see if this object had previously had its {@code free} method
 587      * called
 588      *
 589      * @throws SerialException
 590      */
 591     private void isValid() throws SerialException {
 592         if (buf == null) {
 593             throw new SerialException("Error: You cannot call a method on a " +