org.apache.giraph.utils

Class EdgeComparator<I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable>

java.lang.Object

org.apache.giraph.utils.EdgeComparator<I,E>

Type Parameters:

I - Vertex id

E - Edge value (needs to be WritableComparable)

All Implemented Interfaces:

Serializable, Comparator<Edge<I,E>>

public class EdgeComparator<I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable>
extends Object
implements Comparator<Edge<I,E>>, Serializable

Comparator for edges.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
EdgeComparator()

Method Summary

Modifier and Type	Method and Description
int	compare(Edge<I,E> e1, Edge<I,E> e2)
static <I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable> int	compareEdges(Edge<I,E> e1, Edge<I,E> e2) Compares two edges.
static <I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable> boolean	equal(Edge<I,E> e1, Edge<I,E> e2) Indicates whether two edges are equal.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

EdgeComparator

public EdgeComparator()

Method Detail

compare

public int compare(Edge<I,E> e1,
                   Edge<I,E> e2)

Specified by:

compare in interface Comparator<Edge<I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable>>

compareEdges

public static <I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable> int compareEdges(Edge<I,E> e1,
                                                                                                                                     Edge<I,E> e2)

Compares two edges.

Type Parameters:

I - Vertex id

E - Edge value (needs to be WritableComparable)

Parameters:

e1 - First edge

e2 - Second edge

Returns:

A negative, zero, or positive value depending

equal

public static <I extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.WritableComparable> boolean equal(Edge<I,E> e1,
                                                                                                                                  Edge<I,E> e2)

Indicates whether two edges are equal.

Type Parameters:

I - Vertex id

E - Edge value (needs to be WritableComparable)

Parameters:

e1 - First edge

e2 - Second edge

Returns:

Whether the two edges are equal