org.apache.mahout.common

Class Pair<A,B>

java.lang.Object

org.apache.mahout.common.Pair<A,B>

All Implemented Interfaces:

Serializable, Comparable<Pair<A,B>>

public final class Pair<A,B>
extends Object
implements Comparable<Pair<A,B>>, Serializable

A simple (ordered) pair of two objects. Elements may be null.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Pair(A first, B second)

Method Summary

Methods

Modifier and Type	Method and Description
int	compareTo(Pair<A,B> other) Defines an ordering on pairs that sorts by first value's natural ordering, ascending, and then by second value's natural ordering.
boolean	equals(Object obj)
A	getFirst()
B	getSecond()
int	hashCode()
static <A,B> Pair<A,B>	of(A a, B b)
Pair<B,A>	swap()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Pair

public Pair(A first,
    B second)

Method Detail

getFirst

public A getFirst()

getSecond

public B getSecond()

swap

public Pair<B,A> swap()

of

public static <A,B> Pair<A,B> of(A a,
                 B b)

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

compareTo

public int compareTo(Pair<A,B> other)

Defines an ordering on pairs that sorts by first value's natural ordering, ascending, and then by second value's natural ordering.

Specified by:

compareTo in interface Comparable<Pair<A,B>>

Throws:

ClassCastException - if types are not actually Comparable