voldemort.utils
Class Pair<F,S>

java.lang.Object
  voldemort.utils.Pair<F,S>

All Implemented Interfaces:

com.google.common.base.Function<F,S>, java.io.Serializable

public final class Pair<F,S>
extends java.lang.Object
implements java.io.Serializable, com.google.common.base.Function<F,S>

Represents a pair of items.

See Also:

Serialized Form

Constructor Summary

Pair(F first, S second)
Use the static factory method create(Object, Object) instead of this where possible.

Method Summary

S	apply(F from)
static <F,S> Pair<F,S>	create(F first, S second) Static factory method that, unlike the constructor, performs generic inference saving some typing.
boolean	equals(java.lang.Object obj)
F	getFirst()
S	getSecond()
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Pair

public Pair(F first,
            S second)

Use the static factory method create(Object, Object) instead of this where possible.

Parameters:

first -

second -

Method Detail

create

public static final <F,S> Pair<F,S> create(F first,
                                           S second)

Static factory method that, unlike the constructor, performs generic inference saving some typing. Use in the following way (for a pair of Strings):

Pair pair = Pair.create("first", "second");

Type Parameters:

F - The type of the first thing.

S - The type of the second thing

Parameters:

first - The first thing

second - The second thing

Returns:

The pair (first,second)

apply

public S apply(F from)

Specified by:

apply in interface com.google.common.base.Function<F,S>

Parameters:

from -

Returns:

this.second if from == this.first even if from and this.first are both null

getFirst

public final F getFirst()

getSecond

public final S getSecond()

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public final boolean equals(java.lang.Object obj)

Specified by:

equals in interface com.google.common.base.Function<F,S>

Overrides:

equals in class java.lang.Object

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object