it.unimi.dsi.fastutil.doubles

Class Double2DoubleSortedMaps

java.lang.Object

it.unimi.dsi.fastutil.doubles.Double2DoubleSortedMaps

public class Double2DoubleSortedMaps
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	Double2DoubleSortedMaps.EmptySortedMap An immutable class representing an empty type-specific sorted map.
static class	Double2DoubleSortedMaps.Singleton An immutable class representing a type-specific singleton sorted map.
static class	Double2DoubleSortedMaps.SynchronizedSortedMap A synchronized wrapper class for sorted maps.
static class	Double2DoubleSortedMaps.UnmodifiableSortedMap An unmodifiable wrapper class for sorted maps.

Field Summary

Fields

Modifier and Type	Field and Description
static Double2DoubleSortedMaps.EmptySortedMap	EMPTY_MAP An empty type-specific sorted map (immutable).

Method Summary

Methods

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 Double2DoubleSortedMap	singleton(double key, double value) Returns a type-specific immutable sorted map containing only the specified pair.
static Double2DoubleSortedMap	singleton(Double key, Double value) Returns a type-specific immutable sorted map containing only the specified pair.
static Double2DoubleSortedMap	singleton(double key, double value, DoubleComparator comparator) Returns a type-specific immutable sorted map containing only the specified pair.
static Double2DoubleSortedMap	singleton(Double key, Double value, DoubleComparator comparator) RETURNS a type-specific immutable sorted map containing only the specified pair.
static Double2DoubleSortedMap	synchronize(Double2DoubleSortedMap m) Returns a synchronized type-specific sorted map backed by the given type-specific sorted map.
static Double2DoubleSortedMap	synchronize(Double2DoubleSortedMap 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 Double2DoubleSortedMap	unmodifiable(Double2DoubleSortedMap m) Returns an unmodifiable type-specific sorted map backed by the given type-specific sorted map.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_MAP

public static final Double2DoubleSortedMaps.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 Double2DoubleSortedMap singleton(Double key,
                               Double 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 Double2DoubleSortedMap singleton(Double key,
                               Double 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 Double2DoubleSortedMap singleton(double key,
                               double 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 Double2DoubleSortedMap singleton(double key,
                               double 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 Double2DoubleSortedMap synchronize(Double2DoubleSortedMap 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 Double2DoubleSortedMap synchronize(Double2DoubleSortedMap 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 Double2DoubleSortedMap unmodifiable(Double2DoubleSortedMap 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)