Enum Class ColumnOrder

java.lang.Object

java.lang.Enum<ColumnOrder>

dev.hardwood.metadata.ColumnOrder

All Implemented Interfaces:

Serializable, Comparable<ColumnOrder>, Constable

public enum ColumnOrder
extends Enum<ColumnOrder>

The ordering used for a leaf column's min/max statistics, decoded from the FileMetaData.column_orders union.

When a file omits column_orders, the type-defined ordering applies implicitly to every column and FileMetaData.columnOrders is empty.

See Also:

• parquet.thrift

Nested Class Summary

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
IEEE754_TOTAL_ORDER	The IEEE 754 total order (the IEEE_754_TOTAL_ORDER union member).
TYPE_DEFINED_ORDER	Ordering defined by the column's physical or logical type (the TYPE_ORDER union member).
UNKNOWN	A ColumnOrder union member that this version of Hardwood does not recognize, e.g. an ordering added to the Parquet format after this release.

Method Summary

Modifier and Type	Method	Description
static ColumnOrder	valueOf(String name)	Returns the enum constant of this class with the specified name.
static ColumnOrder[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

TYPE_DEFINED_ORDER

public static final ColumnOrder TYPE_DEFINED_ORDER

Ordering defined by the column's physical or logical type (the TYPE_ORDER union member). For FLOAT and DOUBLE this is a signed comparison of the represented value, with the documented NaN and ±0 compatibility rules applied when reading statistics.

IEEE754_TOTAL_ORDER

public static final ColumnOrder IEEE754_TOTAL_ORDER

The IEEE 754 total order (the IEEE_754_TOTAL_ORDER union member).

UNKNOWN

public static final ColumnOrder UNKNOWN

A ColumnOrder union member that this version of Hardwood does not recognize, e.g. an ordering added to the Parquet format after this release.

Method Details

values

public static ColumnOrder[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static ColumnOrder valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null