it.unimi.dsi.fastutil.doubles

Class Double2ReferenceMaps.EmptyMap<V>

java.lang.Object

it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction<V>

it.unimi.dsi.fastutil.doubles.Double2ReferenceFunctions.EmptyFunction<V>

it.unimi.dsi.fastutil.doubles.Double2ReferenceMaps.EmptyMap<V>

All Implemented Interfaces:

Double2ReferenceFunction<V>, Double2ReferenceMap<V>, Function<Double,V>, Serializable, Cloneable, Map<Double,V>

Direct Known Subclasses:

Double2ReferenceSortedMaps.EmptySortedMap

Enclosing class:

Double2ReferenceMaps

public static class Double2ReferenceMaps.EmptyMap<V>
extends Double2ReferenceFunctions.EmptyFunction<V>
implements Double2ReferenceMap<V>, Serializable, Cloneable

An immutable class representing an empty type-specific map.

This class may be useful to implement your own in case you subclass a type-specific map.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.doubles.Double2ReferenceMap

Double2ReferenceMap.Entry<V>, Double2ReferenceMap.FastEntrySet<V>

Method Summary

Modifier and Type	Method and Description
Object	clone()
boolean	containsValue(Object v)
ObjectSet<Double2ReferenceMap.Entry<V>>	double2ReferenceEntrySet() Returns a type-specific set view of the mappings contained in this map.
ObjectSet<Map.Entry<Double,V>>	entrySet() Returns a set view of the mappings contained in this map.
boolean	equals(Object o)
int	hashCode()
boolean	isEmpty()
DoubleSet	keySet() Returns a set view of the keys contained in this map.
void	putAll(Map<? extends Double,? extends V> m)
String	toString()
ReferenceCollection<V>	values() Returns a set view of the values contained in this map.

Methods inherited from class it.unimi.dsi.fastutil.doubles.Double2ReferenceFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, size

Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction

containsKey, put, put, remove, remove

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2ReferenceFunction

containsKey, defaultReturnValue, defaultReturnValue, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.Function

clear, containsKey, get, put, remove, size

Methods inherited from interface java.util.Map

clear, compute, computeIfAbsent, computeIfPresent, containsKey, forEach, get, getOrDefault, merge, put, putIfAbsent, remove, remove, replace, replace, replaceAll, size

Method Detail

containsValue

public boolean containsValue(Object v)

Specified by:

containsValue in interface Map<Double,V>

putAll

public void putAll(Map<? extends Double,? extends V> m)

Specified by:

putAll in interface Map<Double,V>

double2ReferenceEntrySet

public ObjectSet<Double2ReferenceMap.Entry<V>> double2ReferenceEntrySet()

Description copied from interface: Double2ReferenceMap

Returns a type-specific set view of the mappings contained in this map.

This method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen Double2ReferenceMap.entrySet() so that it returns an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).

Specified by:

double2ReferenceEntrySet in interface Double2ReferenceMap<V>

Returns:

a type-specific set view of the mappings contained in this map.

See Also:

Double2ReferenceMap.entrySet()

keySet

public DoubleSet keySet()

Description copied from interface: Double2ReferenceMap

Returns a set view of the keys contained in this map.

Note that this specification strengthens the one given in Map.keySet().

Specified by:

keySet in interface Double2ReferenceMap<V>

Specified by:

keySet in interface Map<Double,V>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

values

public ReferenceCollection<V> values()

Description copied from interface: Double2ReferenceMap

Returns a set view of the values contained in this map.

Note that this specification strengthens the one given in Map.values().

Specified by:

values in interface Double2ReferenceMap<V>

Specified by:

values in interface Map<Double,V>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

clone

public Object clone()

Overrides:

clone in class Double2ReferenceFunctions.EmptyFunction<V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Double,V>

entrySet

public ObjectSet<Map.Entry<Double,V>> entrySet()

Description copied from interface: Double2ReferenceMap

Returns a set view of the mappings contained in this map.

Note that this specification strengthens the one given in Map.entrySet().

Specified by:

entrySet in interface Double2ReferenceMap<V>

Specified by:

entrySet in interface Map<Double,V>

Returns:

a set view of the mappings contained in this map.

See Also:

Map.entrySet()

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Double,V>

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Double,V>

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object