Package it.unimi.dsi.fastutil.objects
Class Reference2LongMaps.EmptyMap<K>
java.lang.Object
it.unimi.dsi.fastutil.objects.AbstractReference2LongFunction<K>
it.unimi.dsi.fastutil.objects.Reference2LongFunctions.EmptyFunction<K>
it.unimi.dsi.fastutil.objects.Reference2LongMaps.EmptyMap<K>
- All Implemented Interfaces:
Function<K,
,Long> Reference2LongFunction<K>
,Reference2LongMap<K>
,Serializable
,Cloneable
,Function<K,
,Long> ToLongFunction<K>
,Map<K,
Long>
- Direct Known Subclasses:
Reference2LongSortedMaps.EmptySortedMap
- Enclosing class:
Reference2LongMaps
public static class Reference2LongMaps.EmptyMap<K>
extends Reference2LongFunctions.EmptyFunction<K>
implements Reference2LongMap<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:
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Nested Class Summary
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2LongMap
Reference2LongMap.Entry<K>, Reference2LongMap.FastEntrySet<K>
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Method Summary
Modifier and TypeMethodDescriptionclone()
boolean
containsValue
(long v) Returnstrue
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
void
forEach
(BiConsumer<? super K, ? super Long> consumer) long
getOrDefault
(Object key, long defaultValue) Returns the value associated by this function to the specified key, or give the specified value if not present.getOrDefault
(Object key, Long defaultValue) Deprecated.int
hashCode()
boolean
isEmpty()
keySet()
void
Returns a type-specific set view of the mappings contained in this map.toString()
values()
Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2LongFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size
Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, replaceAll
Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2LongFunction
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsLong, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, getLong, put, removeLong
Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2LongMap
clear, computeIfAbsent, computeIfAbsent, computeLong, computeLongIfAbsent, computeLongIfAbsentPartial, computeLongIfPresent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, merge, merge, mergeLong, mergeLong, mergeLong, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size
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Method Details
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containsValue
public boolean containsValue(long v) Description copied from interface:Reference2LongMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceReference2LongMap<K>
- See Also:
-
getOrDefault
Deprecated.Description copied from interface:Reference2LongMap
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 interfaceFunction<K,
Long> - Specified by:
getOrDefault
in interfaceMap<K,
Long> - Specified by:
getOrDefault
in interfaceReference2LongFunction<K>
- Specified by:
getOrDefault
in interfaceReference2LongMap<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:
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getOrDefault
Description copied from interface:Reference2LongFunction
Returns the value associated by this function to the specified key, or give the specified value if not present.- Specified by:
getOrDefault
in interfaceReference2LongFunction<K>
- Specified by:
getOrDefault
in interfaceReference2LongMap<K>
- Overrides:
getOrDefault
in classReference2LongFunctions.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:
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containsValue
Deprecated.Please use the corresponding type-specific method instead.- Specified by:
containsValue
in interfaceMap<K,
Long> - Specified by:
containsValue
in interfaceReference2LongMap<K>
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putAll
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reference2LongEntrySet
Description copied from interface:Reference2LongMap
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 anObjectSet
of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).- Specified by:
reference2LongEntrySet
in interfaceReference2LongMap<K>
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
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keySet
Description copied from interface:Reference2LongMap
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values
Description copied from interface:Reference2LongMap
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forEach
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clone
- Overrides:
clone
in classReference2LongFunctions.EmptyFunction<K>
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isEmpty
public boolean isEmpty() -
hashCode
public int hashCode() -
equals
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toString
- Overrides:
toString
in classReference2LongFunctions.EmptyFunction<K>
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