edu.rice.hj.api

Enum HjOperator

java.lang.Object

java.lang.Enum<HjOperator>

edu.rice.hj.api.HjOperator

All Implemented Interfaces:

Serializable, Comparable<HjOperator>

public enum HjOperator
extends Enum<HjOperator>

An operator used in parallel reductions by finish accumulators. For deterministic results the operator needs to be associative.

Author:

Shams Imam (shams@rice.edu)

Enum Constant Summary

Enum Constants

Enum Constant and Description
ANY Represents the any operation
MAX Represents the max operation
MIN Represents the min operation
PROD Represents a product operation
SUM Represents a sum operation

Method Summary

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

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SUM

public static final HjOperator SUM

Represents a sum operation

PROD

public static final HjOperator PROD

Represents a product operation

MIN

public static final HjOperator MIN

Represents the min operation

MAX

public static final HjOperator MAX

Represents the max operation

ANY

public static final HjOperator ANY

Represents the any operation

Method Detail

values

public static HjOperator[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (HjOperator c : HjOperator.values())
    System.out.println(c);

Returns:

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

valueOf

public static HjOperator valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null