code: public Object sqlToJava(Object source)
      {
           if (source == null)
              return null;
          try
          {
              ByteArrayInputStream bais = new ByteArrayInputStream((byte[]) source);
              GZIPInputStream gis = new GZIPInputStream(bais);
              ObjectInputStream ois = new ObjectInputStream(gis);
              Object result = ois.readObject();
              ois.close();
              gis.close();
              bais.close();
              return result;
          }
          catch (Throwable t)
          {
              throw new ConversionException(t);
          }
      }
docs: /*
  @see FieldConversion#sqlToJava(Object)