Package it.unimi.dsi.fastutil.objects

Class Object2IntMaps.EmptyMap<K>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractObject2IntFunction<K>

it.unimi.dsi.fastutil.objects.Object2IntFunctions.EmptyFunction<K>

it.unimi.dsi.fastutil.objects.Object2IntMaps.EmptyMap<K>

All Implemented Interfaces:

Function<K,Integer>, Object2IntFunction<K>, Object2IntMap<K>, Serializable, Cloneable, Function<K,Integer>, ToIntFunction<K>, Map<K,Integer>

Direct Known Subclasses:

Object2IntSortedMaps.EmptySortedMap

Enclosing class:

Object2IntMaps

public static class Object2IntMaps.EmptyMap<K>
extends Object2IntFunctions.EmptyFunction<K>
implements Object2IntMap<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.Object2IntMap

Object2IntMap.Entry<K>, Object2IntMap.FastEntrySet<K>

Method Summary

Modifier and Type	Method	Description
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 K,? super Integer> consumer)
int	getOrDefault(Object 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()
ObjectSet<K>	keySet()
ObjectSet<Object2IntMap.Entry<K>>	object2IntEntrySet()	Returns a type-specific set view of the mappings contained in this map.
void	putAll(Map<? extends K,? extends Integer> m)
String	toString()
IntCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.objects.Object2IntFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, getInt, 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.Object2IntFunction

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

Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2IntMap

clear, computeIfAbsent, computeIfAbsent, computeInt, computeIntIfAbsent, computeIntIfAbsentPartial, computeIntIfPresent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, merge, mergeInt, mergeInt, mergeInt, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Method Details

containsValue

public boolean containsValue(int v)

Description copied from interface: Object2IntMap

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

Specified by:

containsValue in interface Object2IntMap<K>

See Also:

• Map.containsValue(Object)

getOrDefault

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

Deprecated.

Description copied from interface: Object2IntMap

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,Integer>

Specified by:

getOrDefault in interface Map<K,Integer>

Specified by:

getOrDefault in interface Object2IntFunction<K>

Specified by:

getOrDefault in interface Object2IntMap<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 int getOrDefault(Object key,
 int defaultValue)

Description copied from interface: Object2IntFunction

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

Specified by:

getOrDefault in interface Object2IntFunction<K>

Specified by:

getOrDefault in interface Object2IntMap<K>

Overrides:

getOrDefault in class Object2IntFunctions.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,Integer>

Specified by:

containsValue in interface Object2IntMap<K>

putAll

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

Specified by:

putAll in interface Map<K,Integer>

object2IntEntrySet

public ObjectSet<Object2IntMap.Entry<K>> object2IntEntrySet()

Description copied from interface: Object2IntMap

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:

object2IntEntrySet in interface Object2IntMap<K>

Returns:

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

See Also:

• Map.entrySet()

keySet

public ObjectSet<K> keySet()

Description copied from interface: Object2IntMap

Specified by:

keySet in interface Map<K,Integer>

Specified by:

keySet in interface Object2IntMap<K>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public IntCollection values()

Description copied from interface: Object2IntMap

Specified by:

values in interface Map<K,Integer>

Specified by:

values in interface Object2IntMap<K>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

forEach

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

Specified by:

forEach in interface Map<K,Integer>

Specified by:

forEach in interface Object2IntMap<K>

clone

public Object clone()

Overrides:

clone in class Object2IntFunctions.EmptyFunction<K>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,Integer>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,Integer>

Overrides:

hashCode in class Object2IntFunctions.EmptyFunction<K>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<K,Integer>

Overrides:

equals in class Object2IntFunctions.EmptyFunction<K>

toString

public String toString()

Overrides:

toString in class Object2IntFunctions.EmptyFunction<K>