it.unimi.dsi.fastutil.objects
Class Object2ReferenceMaps.Singleton<K,V>

java.lang.Object
  extended by it.unimi.dsi.fastutil.objects.AbstractObject2ReferenceFunction<K,V>
      extended by it.unimi.dsi.fastutil.objects.Object2ReferenceFunctions.Singleton<K,V>
          extended by it.unimi.dsi.fastutil.objects.Object2ReferenceMaps.Singleton<K,V>
All Implemented Interfaces:
Function<K,V>, Object2ReferenceFunction<K,V>, Object2ReferenceMap<K,V>, Serializable, Cloneable, Map<K,V>
Direct Known Subclasses:
Object2ReferenceSortedMaps.Singleton
Enclosing class:
Object2ReferenceMaps

public static class Object2ReferenceMaps.Singleton<K,V>
extends Object2ReferenceFunctions.Singleton<K,V>
implements Object2ReferenceMap<K,V>, Serializable, Cloneable

An immutable class representing a type-specific singleton 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.Object2ReferenceMap
Object2ReferenceMap.Entry<K,V>, Object2ReferenceMap.FastEntrySet<K,V>
 
Field Summary
static long serialVersionUID
           
 
Method Summary
 boolean containsValue(Object v)
           
 ObjectSet<Map.Entry<K,V>> entrySet()
          Returns a set view of the mappings contained in this map.
 boolean equals(Object o)
           
 int hashCode()
           
 boolean isEmpty()
           
 ObjectSet<K> keySet()
          Returns a set view of the keys contained in this map.
 ObjectSet<Object2ReferenceMap.Entry<K,V>> object2ReferenceEntrySet()
          Returns a type-specific set view of the mappings contained in this map.
 void putAll(Map<? extends K,? extends V> m)
           
 String toString()
           
 ReferenceCollection<V> values()
          Returns a set view of the values contained in this map.
 
Methods inherited from class it.unimi.dsi.fastutil.objects.Object2ReferenceFunctions.Singleton
clone, containsKey, get, size
 
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2ReferenceFunction
clear, defaultReturnValue, defaultReturnValue, put, remove
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2ReferenceFunction
defaultReturnValue, defaultReturnValue
 
Methods inherited from interface it.unimi.dsi.fastutil.Function
clear, containsKey, get, put, remove, size
 
Methods inherited from interface java.util.Map
clear, containsKey, get, put, remove, size
 

Field Detail

serialVersionUID

public static final long serialVersionUID
See Also:
Constant Field Values
Method Detail

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>

object2ReferenceEntrySet

public ObjectSet<Object2ReferenceMap.Entry<K,V>> object2ReferenceEntrySet()
Description copied from interface: Object2ReferenceMap
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 Object2ReferenceMap.entrySet() so that it returns an ObjectSet of objects of type Object2ReferenceMap.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:
object2ReferenceEntrySet in interface Object2ReferenceMap<K,V>
Returns:
a type-specific set view of the mappings contained in this map.
See Also:
Object2ReferenceMap.entrySet()

keySet

public ObjectSet<K> keySet()
Description copied from interface: Object2ReferenceMap
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 Object2ReferenceMap<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 ReferenceCollection<V> values()
Description copied from interface: Object2ReferenceMap
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 Object2ReferenceMap<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()

isEmpty

public boolean isEmpty()
Specified by:
isEmpty in interface Map<K,V>

entrySet

public ObjectSet<Map.Entry<K,V>> entrySet()
Description copied from interface: Object2ReferenceMap
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 Object2ReferenceMap<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