it.unimi.dsi.fastutil.objects
Class Reference2ObjectMaps.EmptyMap<K,V>
java.lang.Object
it.unimi.dsi.fastutil.objects.AbstractReference2ObjectFunction<K,V>
it.unimi.dsi.fastutil.objects.Reference2ObjectFunctions.EmptyFunction<K,V>
it.unimi.dsi.fastutil.objects.Reference2ObjectMaps.EmptyMap<K,V>
- All Implemented Interfaces:
- Function<K,V>, Reference2ObjectFunction<K,V>, Reference2ObjectMap<K,V>, Serializable, Cloneable, Map<K,V>
- Direct Known Subclasses:
- Reference2ObjectSortedMaps.EmptySortedMap
- Enclosing class:
- Reference2ObjectMaps
public static class Reference2ObjectMaps.EmptyMap<K,V>
- extends Reference2ObjectFunctions.EmptyFunction<K,V>
- implements Reference2ObjectMap<K,V>, 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
serialVersionUID
public static final long serialVersionUID
- See Also:
- Constant Field Values
Reference2ObjectMaps.EmptyMap
protected Reference2ObjectMaps.EmptyMap()
containsValue
public boolean containsValue(Object v)
- Specified by:
containsValue
in interface Map<K,V>
putAll
public void putAll(Map<? extends K,? extends V> m)
- Specified by:
putAll
in interface Map<K,V>
reference2ObjectEntrySet
public ObjectSet<Reference2ObjectMap.Entry<K,V>> reference2ObjectEntrySet()
- Description copied from interface:
Reference2ObjectMap
- 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 Reference2ObjectMap.entrySet()
so that it returns an ObjectSet
of objects of type Reference2ObjectMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
- Specified by:
reference2ObjectEntrySet
in interface Reference2ObjectMap<K,V>
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Reference2ObjectMap.entrySet()
keySet
public ReferenceSet<K> keySet()
- Description copied from interface:
Reference2ObjectMap
- Returns a set view of the keys contained in this map.
Note that this specification strengthens the one given in Map.keySet()
.
- Specified by:
keySet
in interface Reference2ObjectMap<K,V>
- Specified by:
keySet
in interface Map<K,V>
- Returns:
- a set view of the keys contained in this map.
- See Also:
Map.keySet()
values
public ObjectCollection<V> values()
- Description copied from interface:
Reference2ObjectMap
- Returns a set view of the values contained in this map.
Note that this specification strengthens the one given in Map.values()
.
- Specified by:
values
in interface Reference2ObjectMap<K,V>
- Specified by:
values
in interface Map<K,V>
- Returns:
- a set view of the values contained in this map.
- See Also:
Map.values()
clone
public Object clone()
- Overrides:
clone
in class Reference2ObjectFunctions.EmptyFunction<K,V>
isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interface Map<K,V>
entrySet
public ObjectSet<Map.Entry<K,V>> entrySet()
- Description copied from interface:
Reference2ObjectMap
- Returns a set view of the mappings contained in this map.
Note that this specification strengthens the one given in Map.entrySet()
.
- Specified by:
entrySet
in interface Reference2ObjectMap<K,V>
- Specified by:
entrySet
in interface Map<K,V>
- Returns:
- a set view of the mappings contained in this map.
- See Also:
Map.entrySet()
hashCode
public int hashCode()
- Specified by:
hashCode
in interface Map<K,V>
- Overrides:
hashCode
in class Object
equals
public boolean equals(Object o)
- Specified by:
equals
in interface Map<K,V>
- Overrides:
equals
in class Object
toString
public String toString()
- Overrides:
toString
in class Object
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