it.unimi.dsi.fastutil.objects

Class Reference2LongMaps.EmptyMap<K>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractReference2LongFunction<K>

it.unimi.dsi.fastutil.objects.Reference2LongFunctions.EmptyFunction<K>

it.unimi.dsi.fastutil.objects.Reference2LongMaps.EmptyMap<K>

All Implemented Interfaces:

it.unimi.dsi.fastutil.objects.Reference2LongFunction<K>, Reference2LongMap<K>, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<K,java.lang.Long>, java.util.function.ToLongFunction<K>, java.util.Map<K,java.lang.Long>

Direct Known Subclasses:

Reference2LongSortedMaps.EmptySortedMap

Enclosing class:

Reference2LongMaps

public static class Reference2LongMaps.EmptyMap<K>
extends Reference2LongFunctions.EmptyFunction<K>
implements Reference2LongMap<K>, 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.objects.Reference2LongMap

Reference2LongMap.Entry<K>, Reference2LongMap.FastEntrySet<K>

Field Summary

Fields inherited from class it.unimi.dsi.fastutil.objects.AbstractReference2LongFunction

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 K,? super java.lang.Long> consumer)
long	getOrDefault(java.lang.Object 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.objects.ReferenceSet<K>	keySet()
void	putAll(java.util.Map<? extends K,? extends java.lang.Long> m)
it.unimi.dsi.fastutil.objects.ObjectSet<Reference2LongMap.Entry<K>>	reference2LongEntrySet() Returns a type-specific set view of the mappings contained in this map.
java.lang.String	toString()
it.unimi.dsi.fastutil.longs.LongCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2LongFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2LongMap

clear, computeIfAbsent, computeIfAbsent, computeLong, computeLongIfAbsent, computeLongIfAbsentPartial, computeLongIfPresent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, merge, mergeLong, mergeLong, mergeLong, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2LongFunction

andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsLong, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, getLong, put, removeLong

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

apply

Methods inherited from interface java.util.function.Function

compose, identity

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, replaceAll

Constructor Detail

EmptyMap

protected EmptyMap()

Method Detail

containsValue

public boolean containsValue(long v)

Description copied from interface: Reference2LongMap

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

Specified by:

containsValue in interface Reference2LongMap<K>

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: Reference2LongMap

This default implementation just delegates to the corresponding Map method.

Specified by:

getOrDefault in interface it.unimi.dsi.fastutil.objects.Reference2LongFunction<K>

Specified by:

getOrDefault in interface Reference2LongMap<K>

Specified by:

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

getOrDefault

public long getOrDefault(java.lang.Object key,
                         long defaultValue)

Description copied from interface: Reference2LongMap

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.objects.Reference2LongFunction<K>

Specified by:

getOrDefault in interface Reference2LongMap<K>

Overrides:

getOrDefault in class Reference2LongFunctions.EmptyFunction<K>

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 Reference2LongMap<K>

Specified by:

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

putAll

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

Specified by:

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

reference2LongEntrySet

public it.unimi.dsi.fastutil.objects.ObjectSet<Reference2LongMap.Entry<K>> reference2LongEntrySet()

Description copied from interface: Reference2LongMap

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:

reference2LongEntrySet in interface Reference2LongMap<K>

Returns:

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

See Also:

Map.entrySet()

keySet

public it.unimi.dsi.fastutil.objects.ReferenceSet<K> keySet()

Description copied from interface: Reference2LongMap

Specified by:

keySet in interface Reference2LongMap<K>

Specified by:

keySet in interface java.util.Map<K,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: Reference2LongMap

Specified by:

values in interface Reference2LongMap<K>

Specified by:

values in interface java.util.Map<K,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 K,? super java.lang.Long> consumer)

Specified by:

forEach in interface Reference2LongMap<K>

Specified by:

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

clone

public java.lang.Object clone()

Overrides:

clone in class Reference2LongFunctions.EmptyFunction<K>

isEmpty

public boolean isEmpty()

Specified by:

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

hashCode

public int hashCode()

Specified by:

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

Overrides:

hashCode in class Reference2LongFunctions.EmptyFunction<K>

equals

public boolean equals(java.lang.Object o)

Specified by:

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

Overrides:

equals in class Reference2LongFunctions.EmptyFunction<K>

toString

public java.lang.String toString()

Overrides:

toString in class Reference2LongFunctions.EmptyFunction<K>