Package it.unimi.dsi.fastutil.doubles

Class Double2LongMaps.EmptyMap

java.lang.Object

it.unimi.dsi.fastutil.doubles.AbstractDouble2LongFunction

it.unimi.dsi.fastutil.doubles.Double2LongFunctions.EmptyFunction

it.unimi.dsi.fastutil.doubles.Double2LongMaps.EmptyMap

All Implemented Interfaces:

Double2LongFunction, Double2LongMap, Function<Double,Long>, Serializable, Cloneable, DoubleToLongFunction, Function<Double,Long>, Map<Double,Long>

Direct Known Subclasses:

Double2LongSortedMaps.EmptySortedMap

Enclosing class:

Double2LongMaps

public static class Double2LongMaps.EmptyMap
extends Double2LongFunctions.EmptyFunction
implements Double2LongMap, 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.Double2LongMap

Double2LongMap.Entry, Double2LongMap.FastEntrySet

Method Summary

Modifier and Type	Method	Description
Object	clone()
boolean	containsValue(long v)	Returns true if this map maps one or more keys to the specified value.
boolean	containsValue(Object ov)	Deprecated. Please use the corresponding type-specific method instead.
ObjectSet<Double2LongMap.Entry>	double2LongEntrySet()	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 Long> m)
String	toString()
LongCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.doubles.Double2LongFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2LongFunction

applyAsLong, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2LongMap

clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, 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.Function

apply

Methods inherited from interface java.util.function.Function

andThen, compose

Methods inherited from interface java.util.Map

forEach, replaceAll

Method Detail

containsValue

public boolean containsValue(long v)

Description copied from interface: Double2LongMap

Returns true if this map maps one or more keys to the specified value.

Specified by:

containsValue in interface Double2LongMap

See Also:

Map.containsValue(Object)

containsValue

@Deprecated
public boolean containsValue(Object ov)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

containsValue in interface Double2LongMap

Specified by:

containsValue in interface Map<Double,Long>

putAll

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

Specified by:

putAll in interface Map<Double,Long>

double2LongEntrySet

public ObjectSet<Double2LongMap.Entry> double2LongEntrySet()

Description copied from interface: Double2LongMap

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:

double2LongEntrySet in interface Double2LongMap

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: Double2LongMap

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

Specified by:

keySet in interface Double2LongMap

Specified by:

keySet in interface Map<Double,Long>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

values

public LongCollection values()

Description copied from interface: Double2LongMap

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

Specified by:

values in interface Double2LongMap

Specified by:

values in interface Map<Double,Long>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

clone

public Object clone()

Overrides:

clone in class Double2LongFunctions.EmptyFunction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Double,Long>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Double,Long>

Overrides:

hashCode in class Double2LongFunctions.EmptyFunction

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Double,Long>

Overrides:

equals in class Double2LongFunctions.EmptyFunction

toString

public String toString()

Overrides:

toString in class Double2LongFunctions.EmptyFunction