edu.rice.cs.plt.tuple
Class Pair<T1,T2>

java.lang.Object
  edu.rice.cs.plt.tuple.Tuple
      edu.rice.cs.plt.tuple.Pair<T1,T2>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

IdentityPair

public class Pair<T1,T2>
extends Tuple

An arbitrary pair of objects; overrides toString(), equals(Object), and Tuple.hashCode().

See Also:

Serialized Form

Field Summary

protected T1	_first
protected T2	_second

Constructor Summary

Pair(T1 first, T2 second)

Method Summary

boolean	equals(Object o)
static <T1,T2> Lambda2<T1,T2,Pair<T1,T2>>	factory() Produce a lambda that invokes the constructor.
T1	first()
static <T> Lambda<Pair<? extends T,?>,T>	firstGetter() Produce a lambda that invokes first() on a provided pair.
protected int	generateHashCode()
Pair<T2,T1>	inverse() Invert a pair.
static <T1,T2> Lambda<Pair<T1,T2>,Pair<T2,T1>>	inverter() Produce a lambda that invokes inverse() on a provided pair.
static <T1,T2> Pair<T1,T2>	make(T1 first, T2 second) Call the constructor (allows the type arguments to be inferred)
T2	second()
static <T> Lambda<Pair<?,? extends T>,T>	secondGetter() Produce a lambda that invokes second() on a provided pair.
String	toString()

Methods inherited from class edu.rice.cs.plt.tuple.Tuple

hashCode

Methods inherited from class java.lang.Object

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

Field Detail

_first

protected final T1 _first

_second

protected final T2 _second

Constructor Detail

Pair

public Pair(T1 first,
            T2 second)

Method Detail

first

public T1 first()

second

public T2 second()

inverse

public Pair<T2,T1> inverse()

Invert a pair. Subclasses should override this method to create a new pair of the same type.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

Returns:

true iff this is of the same class as o, and each corresponding element is equal (according to equals)

generateHashCode

protected int generateHashCode()

Specified by:

generateHashCode in class Tuple

make

public static <T1,T2> Pair<T1,T2> make(T1 first,
                                       T2 second)

Call the constructor (allows the type arguments to be inferred)

factory

public static <T1,T2> Lambda2<T1,T2,Pair<T1,T2>> factory()

Produce a lambda that invokes the constructor.

inverter

public static <T1,T2> Lambda<Pair<T1,T2>,Pair<T2,T1>> inverter()

Produce a lambda that invokes inverse() on a provided pair.

firstGetter

public static <T> Lambda<Pair<? extends T,?>,T> firstGetter()

Produce a lambda that invokes first() on a provided pair.

secondGetter

public static <T> Lambda<Pair<?,? extends T>,T> secondGetter()

Produce a lambda that invokes second() on a provided pair.