code: private boolean isEqual(FieldDescriptorDef first, FieldDescriptorDef second)
      {
          return first.getName().equals(second.getName()) &&
                 first.getProperty(PropertyHelper.OJB_PROPERTY_COLUMN).equals(second.getProperty(PropertyHelper.OJB_PROPERTY_COLUMN)) &&
                 first.getProperty(PropertyHelper.OJB_PROPERTY_JDBC_TYPE).equals(second.getProperty(PropertyHelper.OJB_PROPERTY_JDBC_TYPE));
      }
docs: Tests whether the two field descriptors are equal, i.e. have same name, same column
  and same jdbc-type.
  
  @param first  The first field
  @param second The second field
  @return <code>true</code> if they are equal