@Override
  public int hashCode() {
    int result = typeInfo != null ? typeInfo.hashCode() : 0;
    result = 31 * result + (fieldInfos != null ? fieldInfos.hashCode() : 0);
    result = 31 * result + (fieldNames != null ? fieldNames.hashCode() : 0);
    result = 31 * result + (fields != null ? fields.hashCode() : 0);
    result = 31 * result + (isRoot ? 1 : 0);
    return result;
  }
The ArrayWritableObjectInspector will inspect an ArrayWritable, considering it as a Hive struct.<br>
It can also inspect a List if Hive decides to inspect the result of an inspection.
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/serde/ArrayWritableObjectInspector.java