it.unimi.dsi.fastutil.ints

Class Int2IntFunctions

java.lang.Object

it.unimi.dsi.fastutil.ints.Int2IntFunctions

public class Int2IntFunctions
extends Object

A class providing static methods and objects that do useful things with type-specific functions.

See Also:

Function, Collections

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Int2IntFunctions.EmptyFunction An immutable class representing an empty type-specific function.
static class	Int2IntFunctions.Singleton An immutable class representing a type-specific singleton function.
static class	Int2IntFunctions.SynchronizedFunction A synchronized wrapper class for functions.
static class	Int2IntFunctions.UnmodifiableFunction An unmodifiable wrapper class for functions.

Field Summary

Fields

Modifier and Type	Field and Description
static Int2IntFunctions.EmptyFunction	EMPTY_FUNCTION An empty type-specific function (immutable).

Method Summary

Methods

Modifier and Type	Method and Description
static Int2IntFunction	singleton(Integer key, Integer value) Returns a type-specific immutable function containing only the specified pair.
static Int2IntFunction	singleton(int key, int value) Returns a type-specific immutable function containing only the specified pair.
static Int2IntFunction	synchronize(Int2IntFunction f) Returns a synchronized type-specific function backed by the given type-specific function.
static Int2IntFunction	synchronize(Int2IntFunction f, Object sync) Returns a synchronized type-specific function backed by the given type-specific function, using an assigned object to synchronize.
static Int2IntFunction	unmodifiable(Int2IntFunction f) Returns an unmodifiable type-specific function backed by the given type-specific function.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY_FUNCTION

public static final Int2IntFunctions.EmptyFunction EMPTY_FUNCTION

An empty type-specific function (immutable). It is serializable and cloneable.

Method Detail

singleton

public static Int2IntFunction singleton(int key,
                        int value)

Returns a type-specific immutable function containing only the specified pair. The returned function is serializable and cloneable.

Note that albeit the returned function is immutable, its default return value may be changed.

Parameters:

key - the only key of the returned function.

value - the only value of the returned function.

Returns:

a type-specific immutable function containing just the pair <key,value>.

singleton

public static Int2IntFunction singleton(Integer key,
                        Integer value)

Returns a type-specific immutable function containing only the specified pair. The returned function is serializable and cloneable.

Note that albeit the returned function is immutable, its default return value may be changed.

Parameters:

key - the only key of the returned function.

value - the only value of the returned function.

Returns:

a type-specific immutable function containing just the pair <key,value>.

synchronize

public static Int2IntFunction synchronize(Int2IntFunction f)

Returns a synchronized type-specific function backed by the given type-specific function.

Parameters:

f - the function to be wrapped in a synchronized function.

Returns:

a synchronized view of the specified function.

See Also:

Collections.synchronizedMap(java.util.Map)

synchronize

public static Int2IntFunction synchronize(Int2IntFunction f,
                          Object sync)

Returns a synchronized type-specific function backed by the given type-specific function, using an assigned object to synchronize.

Parameters:

f - the function to be wrapped in a synchronized function.

sync - an object that will be used to synchronize the access to the function.

Returns:

a synchronized view of the specified function.

See Also:

Collections.synchronizedMap(java.util.Map)

unmodifiable

public static Int2IntFunction unmodifiable(Int2IntFunction f)

Returns an unmodifiable type-specific function backed by the given type-specific function.

Parameters:

f - the function to be wrapped in an unmodifiable function.

Returns:

an unmodifiable view of the specified function.

See Also:

Collections.unmodifiableMap(java.util.Map)