Package it.unimi.dsi.fastutil.chars

Class Char2ReferenceMaps.EmptyMap<V>

java.lang.Object

it.unimi.dsi.fastutil.chars.AbstractChar2ReferenceFunction<V>

it.unimi.dsi.fastutil.chars.Char2ReferenceFunctions.EmptyFunction<V>

it.unimi.dsi.fastutil.chars.Char2ReferenceMaps.EmptyMap<V>

All Implemented Interfaces:

Char2ReferenceFunction<V>, Char2ReferenceMap<V>, Function<Character,V>, Serializable, Cloneable, Function<Character,V>, IntFunction<V>, Map<Character,V>

Direct Known Subclasses:

Char2ReferenceSortedMaps.EmptySortedMap

Enclosing class:

Char2ReferenceMaps

public static class Char2ReferenceMaps.EmptyMap<V>
extends Char2ReferenceFunctions.EmptyFunction<V>
implements Char2ReferenceMap<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.chars.Char2ReferenceMap

Char2ReferenceMap.Entry<V>, Char2ReferenceMap.FastEntrySet<V>

Method Summary

Modifier and Type	Method	Description
ObjectSet<Char2ReferenceMap.Entry<V>>	char2ReferenceEntrySet()	Returns a type-specific set view of the mappings contained in this map.
Object	clone()
boolean	containsValue(Object v)
boolean	equals(Object o)
void	forEach(BiConsumer<? super Character,? super V> consumer)
V	getOrDefault(char key, V defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
V	getOrDefault(Object key, V defaultValue)	Deprecated.
int	hashCode()
boolean	isEmpty()
CharSet	keySet()
void	putAll(Map<? extends Character,? extends V> m)
String	toString()
ReferenceCollection<V>	values()

Methods inherited from class it.unimi.dsi.fastutil.chars.Char2ReferenceFunctions.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.chars.Char2ReferenceFunction

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

Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2ReferenceMap

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

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

apply

Methods inherited from interface java.util.function.Function

andThen

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, merge, putIfAbsent, remove, replace, replace, replaceAll

Method Details

containsValue

public boolean containsValue(Object v)

Specified by:

containsValue in interface Map<Character,V>

getOrDefault

@Deprecated
public V getOrDefault(Object key,
 V defaultValue)

Deprecated.

Description copied from interface: Char2ReferenceMap

Returns the value associated by this function to the specified key, or give the specified value if not present.

This default implementation just delegates to the corresponding Map method.

Specified by:

getOrDefault in interface Char2ReferenceFunction<V>

Specified by:

getOrDefault in interface Char2ReferenceMap<V>

Specified by:

getOrDefault in interface Function<Character,V>

Specified by:

getOrDefault in interface Map<Character,V>

Parameters:

key - the key.

defaultValue - the default value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Map.getOrDefault(Object, Object)

getOrDefault

public V getOrDefault(char key,
 V defaultValue)

Description copied from interface: Char2ReferenceFunction

Returns the value associated by this function to the specified key, or give the specified value if not present.

Specified by:

getOrDefault in interface Char2ReferenceFunction<V>

Specified by:

getOrDefault in interface Char2ReferenceMap<V>

Overrides:

getOrDefault in class Char2ReferenceFunctions.EmptyFunction<V>

Parameters:

key - the key.

defaultValue - the value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Function.getOrDefault(Object, Object)

putAll

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

Specified by:

putAll in interface Map<Character,V>

char2ReferenceEntrySet

public ObjectSet<Char2ReferenceMap.Entry<V>> char2ReferenceEntrySet()

Description copied from interface: Char2ReferenceMap

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:

char2ReferenceEntrySet in interface Char2ReferenceMap<V>

Returns:

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

See Also:

• Map.entrySet()

keySet

public CharSet keySet()

Description copied from interface: Char2ReferenceMap

Specified by:

keySet in interface Char2ReferenceMap<V>

Specified by:

keySet in interface Map<Character,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: Char2ReferenceMap

Specified by:

values in interface Char2ReferenceMap<V>

Specified by:

values in interface Map<Character,V>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

forEach

public void forEach(BiConsumer<? super Character,? super V> consumer)

Specified by:

forEach in interface Char2ReferenceMap<V>

Specified by:

forEach in interface Map<Character,V>

clone

public Object clone()

Overrides:

clone in class Char2ReferenceFunctions.EmptyFunction<V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Character,V>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Character,V>

Overrides:

hashCode in class Char2ReferenceFunctions.EmptyFunction<V>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Character,V>

Overrides:

equals in class Char2ReferenceFunctions.EmptyFunction<V>

toString

public String toString()

Overrides:

toString in class Char2ReferenceFunctions.EmptyFunction<V>