Package it.unimi.dsi.fastutil.chars

Class Char2IntMaps.EmptyMap

java.lang.Object

it.unimi.dsi.fastutil.chars.AbstractChar2IntFunction

it.unimi.dsi.fastutil.chars.Char2IntFunctions.EmptyFunction

it.unimi.dsi.fastutil.chars.Char2IntMaps.EmptyMap

All Implemented Interfaces:

Char2IntFunction, Char2IntMap, Function<Character,Integer>, Serializable, Cloneable, Function<Character,Integer>, IntUnaryOperator, Map<Character,Integer>

Direct Known Subclasses:

Char2IntSortedMaps.EmptySortedMap

Enclosing class:

Char2IntMaps

public static class Char2IntMaps.EmptyMap
extends Char2IntFunctions.EmptyFunction
implements Char2IntMap, 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.Char2IntMap

Char2IntMap.Entry, Char2IntMap.FastEntrySet

Method Summary

Modifier and Type	Method	Description
ObjectSet<Char2IntMap.Entry>	char2IntEntrySet()	Returns a type-specific set view of the mappings contained in this map.
Object	clone()
boolean	containsValue(int 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 Integer> consumer)
int	getOrDefault(char key, int defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
Integer	getOrDefault(Object key, Integer defaultValue)	Deprecated.
int	hashCode()
boolean	isEmpty()
CharSet	keySet()
void	putAll(Map<? extends Character,? extends Integer> m)
String	toString()
IntCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.chars.Char2IntFunctions.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.Char2IntFunction

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.Char2IntMap

clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, merge, mergeInt, mergeInt, 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(int v)

Description copied from interface: Char2IntMap

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

Specified by:

containsValue in interface Char2IntMap

See Also:

• Map.containsValue(Object)

getOrDefault

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

Deprecated.

Description copied from interface: Char2IntMap

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 Char2IntFunction

Specified by:

getOrDefault in interface Char2IntMap

Specified by:

getOrDefault in interface Function<Character,Integer>

Specified by:

getOrDefault in interface Map<Character,Integer>

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 int getOrDefault(char key,
 int defaultValue)

Description copied from interface: Char2IntFunction

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

Specified by:

getOrDefault in interface Char2IntFunction

Specified by:

getOrDefault in interface Char2IntMap

Overrides:

getOrDefault in class Char2IntFunctions.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 Char2IntMap

Specified by:

containsValue in interface Map<Character,Integer>

putAll

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

Specified by:

putAll in interface Map<Character,Integer>

char2IntEntrySet

public ObjectSet<Char2IntMap.Entry> char2IntEntrySet()

Description copied from interface: Char2IntMap

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:

char2IntEntrySet in interface Char2IntMap

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: Char2IntMap

Specified by:

keySet in interface Char2IntMap

Specified by:

keySet in interface Map<Character,Integer>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public IntCollection values()

Description copied from interface: Char2IntMap

Specified by:

values in interface Char2IntMap

Specified by:

values in interface Map<Character,Integer>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

forEach

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

Specified by:

forEach in interface Char2IntMap

Specified by:

forEach in interface Map<Character,Integer>

clone

public Object clone()

Overrides:

clone in class Char2IntFunctions.EmptyFunction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Character,Integer>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Character,Integer>

Overrides:

hashCode in class Char2IntFunctions.EmptyFunction

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Character,Integer>

Overrides:

equals in class Char2IntFunctions.EmptyFunction

toString

public String toString()

Overrides:

toString in class Char2IntFunctions.EmptyFunction