Package it.unimi.dsi.fastutil.chars

Class Char2CharMaps.EmptyMap

java.lang.Object

it.unimi.dsi.fastutil.chars.AbstractChar2CharFunction

it.unimi.dsi.fastutil.chars.Char2CharFunctions.EmptyFunction

it.unimi.dsi.fastutil.chars.Char2CharMaps.EmptyMap

All Implemented Interfaces:

Char2CharFunction, Char2CharMap, Function<Character,Character>, Serializable, Cloneable, Function<Character,Character>, IntUnaryOperator, Map<Character,Character>

Direct Known Subclasses:

Char2CharSortedMaps.EmptySortedMap

Enclosing class:

Char2CharMaps

public static class Char2CharMaps.EmptyMap
extends Char2CharFunctions.EmptyFunction
implements Char2CharMap, 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.Char2CharMap

Char2CharMap.Entry, Char2CharMap.FastEntrySet

Method Summary

Modifier and Type	Method	Description
ObjectSet<Char2CharMap.Entry>	char2CharEntrySet()	Returns a type-specific set view of the mappings contained in this map.
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 Character,? super Character> consumer)
char	getOrDefault(char 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()
CharSet	keySet()
void	putAll(Map<? extends Character,? extends Character> m)
String	toString()
CharCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.chars.Char2CharFunctions.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.Char2CharFunction

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

Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2CharMap

clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, merge, mergeChar, mergeChar, 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.IntUnaryOperator

andThen, compose

Methods inherited from interface java.util.Map

replaceAll

Method Details

containsValue

public boolean containsValue(char v)

Description copied from interface: Char2CharMap

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

Specified by:

containsValue in interface Char2CharMap

See Also:

• Map.containsValue(Object)

getOrDefault

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

Deprecated.

Description copied from interface: Char2CharMap

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 Char2CharFunction

Specified by:

getOrDefault in interface Char2CharMap

Specified by:

getOrDefault in interface Function<Character,Character>

Specified by:

getOrDefault in interface Map<Character,Character>

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(char key,
 char defaultValue)

Description copied from interface: Char2CharFunction

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

Specified by:

getOrDefault in interface Char2CharFunction

Specified by:

getOrDefault in interface Char2CharMap

Overrides:

getOrDefault in class Char2CharFunctions.EmptyFunction

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 Char2CharMap

Specified by:

containsValue in interface Map<Character,Character>

putAll

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

Specified by:

putAll in interface Map<Character,Character>

char2CharEntrySet

public ObjectSet<Char2CharMap.Entry> char2CharEntrySet()

Description copied from interface: Char2CharMap

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:

char2CharEntrySet in interface Char2CharMap

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: Char2CharMap

Specified by:

keySet in interface Char2CharMap

Specified by:

keySet in interface Map<Character,Character>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public CharCollection values()

Description copied from interface: Char2CharMap

Specified by:

values in interface Char2CharMap

Specified by:

values in interface Map<Character,Character>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

forEach

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

Specified by:

forEach in interface Char2CharMap

Specified by:

forEach in interface Map<Character,Character>

clone

public Object clone()

Overrides:

clone in class Char2CharFunctions.EmptyFunction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Character,Character>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Character,Character>

Overrides:

hashCode in class Char2CharFunctions.EmptyFunction

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Character,Character>

Overrides:

equals in class Char2CharFunctions.EmptyFunction

toString

public String toString()

Overrides:

toString in class Char2CharFunctions.EmptyFunction