public boolean isSet(_Fields field) {
    if (field == null) {
      throw new java.lang.IllegalArgumentException();
    }

    switch (field) {
    case NAME:
      return isSetName();
    case TYPE:
      return isSetType();
    case URL:
      return isSetUrl();
    case DESCRIPTION:
      return isSetDescription();
    case PARAMETERS:
      return isSetParameters();
    case OWNER_NAME:
      return isSetOwnerName();
    case OWNER_TYPE:
      return isSetOwnerType();
    case CREATE_TIME:
      return isSetCreateTime();
    }
    throw new java.lang.IllegalStateException();
  }
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/DataConnector.java