it.unimi.dsi.fastutil.doubles

Class Double2ObjectSortedMaps

java.lang.Object

it.unimi.dsi.fastutil.doubles.Double2ObjectSortedMaps

public class Double2ObjectSortedMaps
extends Object

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

See Also:

Collections

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Double2ObjectSortedMaps.EmptySortedMap<V> An immutable class representing an empty type-specific sorted map.
static class	Double2ObjectSortedMaps.Singleton<V> An immutable class representing a type-specific singleton sorted map.
static class	Double2ObjectSortedMaps.SynchronizedSortedMap<V> A synchronized wrapper class for sorted maps.
static class	Double2ObjectSortedMaps.UnmodifiableSortedMap<V> An unmodifiable wrapper class for sorted maps.

Field Summary

Fields

Modifier and Type	Field and Description
static Double2ObjectSortedMaps.EmptySortedMap	EMPTY_MAP An empty type-specific sorted map (immutable).

Method Summary

Modifier and Type	Method and Description
static Comparator<? super Map.Entry<Double,?>>	entryComparator(DoubleComparator comparator) Returns a comparator for entries based on a given comparator on keys.
static <V> Double2ObjectSortedMap<V>	singleton(double key, V value) Returns a type-specific immutable sorted map containing only the specified pair.
static <V> Double2ObjectSortedMap<V>	singleton(Double key, V value) Returns a type-specific immutable sorted map containing only the specified pair.
static <V> Double2ObjectSortedMap<V>	singleton(double key, V value, DoubleComparator comparator) Returns a type-specific immutable sorted map containing only the specified pair.
static <V> Double2ObjectSortedMap<V>	singleton(Double key, V value, DoubleComparator comparator) RETURNS a type-specific immutable sorted map containing only the specified pair.
static <V> Double2ObjectSortedMap<V>	synchronize(Double2ObjectSortedMap<V> m) Returns a synchronized type-specific sorted map backed by the given type-specific sorted map.
static <V> Double2ObjectSortedMap<V>	synchronize(Double2ObjectSortedMap<V> m, Object sync) Returns a synchronized type-specific sorted map backed by the given type-specific sorted map, using an assigned object to synchronize.
static <V> Double2ObjectSortedMap<V>	unmodifiable(Double2ObjectSortedMap<V> m) Returns an unmodifiable type-specific sorted map backed by the given type-specific sorted map.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_MAP

public static final Double2ObjectSortedMaps.EmptySortedMap EMPTY_MAP

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

Method Detail

entryComparator

public static Comparator<? super Map.Entry<Double,?>> entryComparator(DoubleComparator comparator)

Returns a comparator for entries based on a given comparator on keys.

Parameters:

comparator - a comparator on keys.

Returns:

the associated comparator on entries.

singleton

public static <V> Double2ObjectSortedMap<V> singleton(Double key,
                                                      V value)

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

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

Parameters:

key - the only key of the returned sorted map.

value - the only value of the returned sorted map.

Returns:

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

singleton

public static <V> Double2ObjectSortedMap<V> singleton(Double key,
                                                      V value,
                                                      DoubleComparator comparator)

RETURNS a type-specific immutable sorted map containing only the specified pair. The returned sorted map is serializable and cloneable.

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

Parameters:

key - the only key of the returned sorted map.

value - the only value of the returned sorted map.

comparator - the comparator to use in the returned sorted map.

Returns:

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

singleton

public static <V> Double2ObjectSortedMap<V> singleton(double key,
                                                      V value)

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

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

Parameters:

key - the only key of the returned sorted map.

value - the only value of the returned sorted map.

Returns:

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

singleton

public static <V> Double2ObjectSortedMap<V> singleton(double key,
                                                      V value,
                                                      DoubleComparator comparator)

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

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

Parameters:

key - the only key of the returned sorted map.

value - the only value of the returned sorted map.

comparator - the comparator to use in the returned sorted map.

Returns:

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

synchronize

public static <V> Double2ObjectSortedMap<V> synchronize(Double2ObjectSortedMap<V> m)

Returns a synchronized type-specific sorted map backed by the given type-specific sorted map.

Parameters:

m - the sorted map to be wrapped in a synchronized sorted map.

Returns:

a synchronized view of the specified sorted map.

See Also:

Collections.synchronizedSortedMap(SortedMap)

synchronize

public static <V> Double2ObjectSortedMap<V> synchronize(Double2ObjectSortedMap<V> m,
                                                        Object sync)

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

Parameters:

m - the sorted map to be wrapped in a synchronized sorted map.

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

Returns:

a synchronized view of the specified sorted map.

See Also:

Collections.synchronizedSortedMap(SortedMap)

unmodifiable

public static <V> Double2ObjectSortedMap<V> unmodifiable(Double2ObjectSortedMap<V> m)

Returns an unmodifiable type-specific sorted map backed by the given type-specific sorted map.

Parameters:

m - the sorted map to be wrapped in an unmodifiable sorted map.

Returns:

an unmodifiable view of the specified sorted map.

See Also:

Collections.unmodifiableSortedMap(SortedMap)