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>, Serializable, Cloneable, DoubleFunction<V>, Function<Double,V>, 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>

Field Summary

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

defRetValue

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EmptyMap()

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.
boolean	equals(Object o)
int	hashCode()
boolean	isEmpty()
DoubleSet	keySet()
void	putAll(Map<? extends Double,? extends V> m)
String	toString()
ReferenceCollection<V>	values()

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

clear, containsKey, defaultReturnValue, defaultReturnValue, get, size

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2ReferenceMap

clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, merge, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

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

apply, get, put, remove

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

apply

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Methods inherited from interface java.util.Map

forEach, replaceAll

Constructor Detail

EmptyMap

protected EmptyMap()

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 Map.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:

Map.entrySet()

keySet

public DoubleSet keySet()

Description copied from interface: Double2ReferenceMap

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

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>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Double,V>

Overrides:

hashCode in class Double2ReferenceFunctions.EmptyFunction<V>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Double,V>

Overrides:

equals in class Double2ReferenceFunctions.EmptyFunction<V>

toString

public String toString()

Overrides:

toString in class Double2ReferenceFunctions.EmptyFunction<V>