org.apache.commons.lang3.tuple

Class ImmutableTriple<L,M,R>

java.lang.Object

org.apache.commons.lang3.tuple.Triple<L,M,R>

org.apache.commons.lang3.tuple.ImmutableTriple<L,M,R>

Type Parameters:

L - the left element type

M - the middle element type

R - the right element type

All Implemented Interfaces:

Serializable, Comparable<Triple<L,M,R>>

public final class ImmutableTriple<L,M,R>
extends Triple<L,M,R>

An immutable triple consisting of three Object elements.

Although the implementation is immutable, there is no restriction on the objects that may be stored. If mutable objects are stored in the triple, then the triple itself effectively becomes mutable. The class is also final, so a subclass can not add undesirable behavior.

#ThreadSafe# if all three objects are thread-safe

Since:

3.2

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static ImmutableTriple<?,?,?>[]	EMPTY_ARRAY An empty array.
L	left Left object
M	middle Middle object
R	right Right object

Constructor Summary

Constructors

Constructor and Description
ImmutableTriple(L left, M middle, R right) Create a new triple instance.

Method Summary

Modifier and Type	Method and Description
static <L,M,R> ImmutableTriple<L,M,R>[]	emptyArray() Returns the empty array singleton that can be assigned without compiler warning.
L	getLeft() Gets the left element from this triple.
M	getMiddle() Gets the middle element from this triple.
R	getRight() Gets the right element from this triple.
static <L,M,R> ImmutableTriple<L,M,R>	nullTriple() Returns an immutable triple of nulls.
static <L,M,R> ImmutableTriple<L,M,R>	of(L left, M middle, R right) Obtains an immutable triple of three objects inferring the generic types.

Methods inherited from class org.apache.commons.lang3.tuple.Triple

compareTo, equals, hashCode, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ARRAY

public static final ImmutableTriple<?,?,?>[] EMPTY_ARRAY

An empty array.

Consider using emptyArray() to avoid generics warnings.

Since:

3.10.

left

public final L left

Left object

middle

public final M middle

Middle object

right

public final R right

Right object

Constructor Detail

ImmutableTriple

public ImmutableTriple(L left,
                       M middle,
                       R right)

Create a new triple instance.

Parameters:

left - the left value, may be null

middle - the middle value, may be null

right - the right value, may be null

Method Detail

emptyArray

public static <L,M,R> ImmutableTriple<L,M,R>[] emptyArray()

Returns the empty array singleton that can be assigned without compiler warning.

Type Parameters:

L - the left element type

M - the middle element type

R - the right element type

Returns:

the empty array singleton that can be assigned without compiler warning.

Since:

3.10.

nullTriple

public static <L,M,R> ImmutableTriple<L,M,R> nullTriple()

Returns an immutable triple of nulls.

Type Parameters:

L - the left element of this triple. Value is null.

M - the middle element of this triple. Value is null.

R - the right element of this triple. Value is null.

Returns:

an immutable triple of nulls.

Since:

3.6

of

public static <L,M,R> ImmutableTriple<L,M,R> of(L left,
                                                M middle,
                                                R right)

Obtains an immutable triple of three objects inferring the generic types.

This factory allows the triple to be created using inference to obtain the generic types.

Type Parameters:

L - the left element type

M - the middle element type

R - the right element type

Parameters:

left - the left element, may be null

middle - the middle element, may be null

right - the right element, may be null

Returns:

a triple formed from the three parameters, not null

getLeft

public L getLeft()

Gets the left element from this triple.

Specified by:

getLeft in class Triple<L,M,R>

Returns:

the left element, may be null

getMiddle

public M getMiddle()

Gets the middle element from this triple.

Specified by:

getMiddle in class Triple<L,M,R>

Returns:

the middle element, may be null

getRight

public R getRight()

Gets the right element from this triple.

Specified by:

getRight in class Triple<L,M,R>

Returns:

the right element, may be null