it.unimi.dsi.fastutil.longs

Class Long2LongMaps.EmptyMap

java.lang.Object

it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction

it.unimi.dsi.fastutil.longs.Long2LongFunctions.EmptyFunction

it.unimi.dsi.fastutil.longs.Long2LongMaps.EmptyMap

All Implemented Interfaces:

it.unimi.dsi.fastutil.longs.Long2LongFunction, Long2LongMap, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<java.lang.Long,java.lang.Long>, java.util.function.LongUnaryOperator, java.util.Map<java.lang.Long,java.lang.Long>

Direct Known Subclasses:

Long2LongSortedMaps.EmptySortedMap

Enclosing class:

Long2LongMaps

public static class Long2LongMaps.EmptyMap
extends Long2LongFunctions.EmptyFunction
implements Long2LongMap, java.io.Serializable, java.lang.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.longs.Long2LongMap

Long2LongMap.Entry, Long2LongMap.FastEntrySet

Field Summary

Fields inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction

defRetValue

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EmptyMap()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
boolean	containsValue(long v) Returns true if this map maps one or more keys to the specified value.
boolean	containsValue(java.lang.Object ov) Deprecated. Please use the corresponding type-specific method instead.
boolean	equals(java.lang.Object o)
void	forEach(java.util.function.BiConsumer<? super java.lang.Long,? super java.lang.Long> consumer)
long	getOrDefault(long key, long defaultValue) Returns the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.
java.lang.Long	getOrDefault(java.lang.Object key, java.lang.Long defaultValue) Deprecated.
int	hashCode()
boolean	isEmpty()
it.unimi.dsi.fastutil.longs.LongSet	keySet()
it.unimi.dsi.fastutil.objects.ObjectSet<Long2LongMap.Entry>	long2LongEntrySet() Returns a type-specific set view of the mappings contained in this map.
void	putAll(java.util.Map<? extends java.lang.Long,? extends java.lang.Long> m)
java.lang.String	toString()
it.unimi.dsi.fastutil.longs.LongCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.longs.Long2LongFunctions.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.longs.Long2LongMap

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

Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2LongFunction

andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsLong, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, identity, put, remove

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

apply

Methods inherited from interface java.util.function.LongUnaryOperator

andThen, compose

Methods inherited from interface java.util.Map

replaceAll

Constructor Detail

EmptyMap

protected EmptyMap()

Method Detail

containsValue

public boolean containsValue(long v)

Description copied from interface: Long2LongMap

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

Specified by:

containsValue in interface Long2LongMap

See Also:

Map.containsValue(Object)

getOrDefault

@Deprecated
public java.lang.Long getOrDefault(java.lang.Object key,
                                               java.lang.Long defaultValue)

Deprecated.

Description copied from interface: Long2LongMap

This default implementation just delegates to the corresponding Map method.

Specified by:

getOrDefault in interface it.unimi.dsi.fastutil.longs.Long2LongFunction

Specified by:

getOrDefault in interface Long2LongMap

Specified by:

getOrDefault in interface java.util.Map<java.lang.Long,java.lang.Long>

getOrDefault

public long getOrDefault(long key,
                         long defaultValue)

Description copied from interface: Long2LongMap

Returns the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.

Specified by:

getOrDefault in interface it.unimi.dsi.fastutil.longs.Long2LongFunction

Specified by:

getOrDefault in interface Long2LongMap

Overrides:

getOrDefault in class Long2LongFunctions.EmptyFunction

Parameters:

key - the key.

defaultValue - the default mapping of the key.

Returns:

the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.

See Also:

Map.getOrDefault(Object, Object)

containsValue

@Deprecated
public boolean containsValue(java.lang.Object ov)

Deprecated. Please use the corresponding type-specific method instead.

Specified by:

containsValue in interface Long2LongMap

Specified by:

containsValue in interface java.util.Map<java.lang.Long,java.lang.Long>

putAll

public void putAll(java.util.Map<? extends java.lang.Long,? extends java.lang.Long> m)

Specified by:

putAll in interface java.util.Map<java.lang.Long,java.lang.Long>

long2LongEntrySet

public it.unimi.dsi.fastutil.objects.ObjectSet<Long2LongMap.Entry> long2LongEntrySet()

Description copied from interface: Long2LongMap

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:

long2LongEntrySet in interface Long2LongMap

Returns:

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

See Also:

Map.entrySet()

keySet

public it.unimi.dsi.fastutil.longs.LongSet keySet()

Description copied from interface: Long2LongMap

Specified by:

keySet in interface Long2LongMap

Specified by:

keySet in interface java.util.Map<java.lang.Long,java.lang.Long>

Returns:

a set view of the keys contained in this map.

See Also:

Map.keySet()

values

public it.unimi.dsi.fastutil.longs.LongCollection values()

Description copied from interface: Long2LongMap

Specified by:

values in interface Long2LongMap

Specified by:

values in interface java.util.Map<java.lang.Long,java.lang.Long>

Returns:

a set view of the values contained in this map.

See Also:

Map.values()

forEach

public void forEach(java.util.function.BiConsumer<? super java.lang.Long,? super java.lang.Long> consumer)

Specified by:

forEach in interface Long2LongMap

Specified by:

forEach in interface java.util.Map<java.lang.Long,java.lang.Long>

clone

public java.lang.Object clone()

Overrides:

clone in class Long2LongFunctions.EmptyFunction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<java.lang.Long,java.lang.Long>

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Map<java.lang.Long,java.lang.Long>

Overrides:

hashCode in class Long2LongFunctions.EmptyFunction

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in interface java.util.Map<java.lang.Long,java.lang.Long>

Overrides:

equals in class Long2LongFunctions.EmptyFunction

toString

public java.lang.String toString()

Overrides:

toString in class Long2LongFunctions.EmptyFunction