Package it.unimi.dsi.fastutil.objects

Class Reference2CharMaps.EmptyMap<K>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractReference2CharFunction<K>

it.unimi.dsi.fastutil.objects.Reference2CharFunctions.EmptyFunction<K>

it.unimi.dsi.fastutil.objects.Reference2CharMaps.EmptyMap<K>

All Implemented Interfaces:

Function<K,Character>, Reference2CharFunction<K>, Reference2CharMap<K>, Serializable, Cloneable, Function<K,Character>, ToIntFunction<K>, Map<K,Character>

Direct Known Subclasses:

Reference2CharSortedMaps.EmptySortedMap

Enclosing class:

Reference2CharMaps

public static class Reference2CharMaps.EmptyMap<K>
extends Reference2CharFunctions.EmptyFunction<K>
implements Reference2CharMap<K>, 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.objects.Reference2CharMap

Reference2CharMap.Entry<K>, Reference2CharMap.FastEntrySet<K>

Method Summary

Modifier and Type	Method	Description
Object	clone()
boolean	containsValue(char 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.
boolean	equals(Object o)
void	forEach(BiConsumer<? super K,? super Character> consumer)
char	getOrDefault(Object key, char defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
Character	getOrDefault(Object key, Character defaultValue)	Deprecated.
int	hashCode()
boolean	isEmpty()
ReferenceSet<K>	keySet()
void	putAll(Map<? extends K,? extends Character> m)
ObjectSet<Reference2CharMap.Entry<K>>	reference2CharEntrySet()	Returns a type-specific set view of the mappings contained in this map.
String	toString()
CharCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2CharFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, getChar, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

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

apply

Methods inherited from interface java.util.function.Function

compose

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, replaceAll

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2CharFunction

andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsInt, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, getChar, put, removeChar

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2CharMap

clear, computeChar, computeCharIfAbsent, computeCharIfAbsentPartial, computeCharIfPresent, computeIfAbsent, computeIfAbsent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, merge, mergeChar, mergeChar, mergeChar, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Method Details

containsValue

public boolean containsValue(char v)

Description copied from interface: Reference2CharMap

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

Specified by:

containsValue in interface Reference2CharMap<K>

See Also:

• Map.containsValue(Object)

getOrDefault

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

Deprecated.

Description copied from interface: Reference2CharMap

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 Function<K,Character>

Specified by:

getOrDefault in interface Map<K,Character>

Specified by:

getOrDefault in interface Reference2CharFunction<K>

Specified by:

getOrDefault in interface Reference2CharMap<K>

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 char getOrDefault(Object key,
 char defaultValue)

Description copied from interface: Reference2CharFunction

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

Specified by:

getOrDefault in interface Reference2CharFunction<K>

Specified by:

getOrDefault in interface Reference2CharMap<K>

Overrides:

getOrDefault in class Reference2CharFunctions.EmptyFunction<K>

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)

containsValue

@Deprecated
public boolean containsValue(Object ov)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

containsValue in interface Map<K,Character>

Specified by:

containsValue in interface Reference2CharMap<K>

putAll

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

Specified by:

putAll in interface Map<K,Character>

reference2CharEntrySet

public ObjectSet<Reference2CharMap.Entry<K>> reference2CharEntrySet()

Description copied from interface: Reference2CharMap

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:

reference2CharEntrySet in interface Reference2CharMap<K>

Returns:

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

See Also:

• Map.entrySet()

keySet

public ReferenceSet<K> keySet()

Description copied from interface: Reference2CharMap

Specified by:

keySet in interface Map<K,Character>

Specified by:

keySet in interface Reference2CharMap<K>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public CharCollection values()

Description copied from interface: Reference2CharMap

Specified by:

values in interface Map<K,Character>

Specified by:

values in interface Reference2CharMap<K>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

forEach

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

Specified by:

forEach in interface Map<K,Character>

Specified by:

forEach in interface Reference2CharMap<K>

clone

public Object clone()

Overrides:

clone in class Reference2CharFunctions.EmptyFunction<K>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,Character>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,Character>

Overrides:

hashCode in class Reference2CharFunctions.EmptyFunction<K>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<K,Character>

Overrides:

equals in class Reference2CharFunctions.EmptyFunction<K>

toString

public String toString()

Overrides:

toString in class Reference2CharFunctions.EmptyFunction<K>