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org.apache.crunch.impl.mr.run
Enum NodeContext

java.lang.Object
  java.lang.Enum<NodeContext>
      org.apache.crunch.impl.mr.run.NodeContext

All Implemented Interfaces:

Serializable, Comparable<NodeContext>

public enum NodeContext
extends Enum<NodeContext>

Enum that is associated with a serialized DoNode instance, so we know how to use it within the context of a particular MR job.

Enum Constant Summary

COMBINE

MAP

REDUCE

Method Summary

String	getConfigurationKey()
static NodeContext	valueOf(String name) Returns the enum constant of this type with the specified name.
static NodeContext[]	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

MAP

public static final NodeContext MAP

REDUCE

public static final NodeContext REDUCE

COMBINE

public static final NodeContext COMBINE

Method Detail

values

public static NodeContext[] 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 (NodeContext c : NodeContext.values())
    System.out.println(c);

Returns:

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

valueOf

public static NodeContext 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

getConfigurationKey

public String getConfigurationKey()