void order(boolean... isDesc) {
    this.orderDesc = isDesc;
  }
TestObjectInspectorUtils.compare method.
int compare(Object[] o1, ObjectInspector[] oi1, Object[] o2,
      ObjectInspector[] oi2, boolean[] columnSortOrderIsDesc, NullValueOption[] nullSortOrder)
serde/src/test/org/apache/hadoop/hive/serde2/objectinspector/TestObjectInspectorUtilsCompare.java