@Override
  public int compareTo(DefaultConstraintsRequest other) {
    if (!getClass().equals(other.getClass())) {
      return getClass().getName().compareTo(other.getClass().getName());
    }

    int lastComparison = 0;

    lastComparison = java.lang.Boolean.compare(isSetCatName(), other.isSetCatName());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetCatName()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.catName, other.catName);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = java.lang.Boolean.compare(isSetDb_name(), other.isSetDb_name());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetDb_name()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.db_name, other.db_name);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = java.lang.Boolean.compare(isSetTbl_name(), other.isSetTbl_name());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetTbl_name()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.tbl_name, other.tbl_name);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = java.lang.Boolean.compare(isSetValidWriteIdList(), other.isSetValidWriteIdList());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetValidWriteIdList()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.validWriteIdList, other.validWriteIdList);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    lastComparison = java.lang.Boolean.compare(isSetTableId(), other.isSetTableId());
    if (lastComparison != 0) {
      return lastComparison;
    }
    if (isSetTableId()) {
      lastComparison = org.apache.thrift.TBaseHelper.compareTo(this.tableId, other.tableId);
      if (lastComparison != 0) {
        return lastComparison;
      }
    }
    return 0;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/DefaultConstraintsRequest.java