com.atlassian.jira.util.lang

Class Pair<F,S>

java.lang.Object

com.atlassian.jira.util.lang.Pair<F,S>

Type Parameters:

F - type of the first element

S - type of the second element

@ThreadSafe
public final class Pair<F,S>
extends Object

Immutable, generic pair of values. How coool is that!

Since:

v4.2

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
F	first()
int	hashCode()
static <U,V> Pair<U,V>	nicePairOf(U first, V second) A pair that does allows null values.
static <U,V> Pair<U,V>	of(U first, V second) By default we create a strict pair of non-null values.
S	second()
static <U,V> Pair<U,V>	strictPairOf(U first, V second) A pair that doesn't allow null values.
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

of

public static <U,V> Pair<U,V> of(U first,
                 V second)

By default we create a strict pair of non-null values.

Type Parameters:

U - type of first value

V - type of second value

Parameters:

first - first value

second - second value

Returns:

new pair

See Also:

strictPairOf(Object, Object)

strictPairOf

public static <U,V> Pair<U,V> strictPairOf(@Nonnull
                           U first,
                           @Nonnull
                           V second)

A pair that doesn't allow null values.

Type Parameters:

U - type of first value

V - type of second value

Parameters:

first - first value, may not be null

second - second value, may not be null

Returns:

new strict pair

nicePairOf

public static <U,V> Pair<U,V> nicePairOf(@Nullable
                         U first,
                         @Nullable
                         V second)

A pair that does allows null values.

Type Parameters:

U - type of first value

V - type of second value

Parameters:

first - first value, may be null

second - second value, may be null

Returns:

new nice pair

first

public F first()

second

public S second()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object