it.unimi.dsi.fastutil.doubles
Class Double2ReferenceMaps.EmptyMap<V>

java.lang.Object
  extended by it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction<V>
      extended by it.unimi.dsi.fastutil.doubles.Double2ReferenceFunctions.EmptyFunction<V>
          extended by it.unimi.dsi.fastutil.doubles.Double2ReferenceMaps.EmptyMap<V>
All Implemented Interfaces:
Double2ReferenceFunction<V>, Double2ReferenceMap<V>, Function<Double,V>, Serializable, Cloneable, Map<Double,V>
Direct Known Subclasses:
Double2ReferenceSortedMaps.EmptySortedMap
Enclosing class:
Double2ReferenceMaps

public static class Double2ReferenceMaps.EmptyMap<V>
extends Double2ReferenceFunctions.EmptyFunction<V>
implements Double2ReferenceMap<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

Nested Class Summary
 
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.doubles.Double2ReferenceMap
Double2ReferenceMap.Entry<V>, Double2ReferenceMap.FastEntrySet<V>
 
Field Summary
static long serialVersionUID
           
 
Fields inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction
defRetValue
 
Constructor Summary
protected Double2ReferenceMaps.EmptyMap()
           
 
Method Summary
 Object clone()
           
 boolean containsValue(Object v)
           
 ObjectSet<Double2ReferenceMap.Entry<V>> double2ReferenceEntrySet()
          Returns a type-specific set view of the mappings contained in this map.
 ObjectSet<Map.Entry<Double,V>> entrySet()
          Returns a set view of the mappings contained in this map.
 boolean equals(Object o)
           
 int hashCode()
           
 boolean isEmpty()
           
 DoubleSet keySet()
          Returns a set view of the keys contained in this map.
 void putAll(Map<? extends Double,? 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.doubles.Double2ReferenceFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, size
 
Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction
containsKey, put, put, remove, remove
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2ReferenceFunction
containsKey, defaultReturnValue, defaultReturnValue, get, put, remove
 
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
Constructor Detail

Double2ReferenceMaps.EmptyMap

protected Double2ReferenceMaps.EmptyMap()
Method Detail

containsValue

public boolean containsValue(Object v)
Specified by:
containsValue in interface Map<Double,V>

putAll

public void putAll(Map<? extends Double,? extends V> m)
Specified by:
putAll in interface Map<Double,V>

double2ReferenceEntrySet

public ObjectSet<Double2ReferenceMap.Entry<V>> double2ReferenceEntrySet()
Description copied from interface: Double2ReferenceMap
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 Double2ReferenceMap.entrySet() so that it returns an ObjectSet of objects of type Double2ReferenceMap.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:
double2ReferenceEntrySet in interface Double2ReferenceMap<V>
Returns:
a type-specific set view of the mappings contained in this map.
See Also:
Double2ReferenceMap.entrySet()

keySet

public DoubleSet keySet()
Description copied from interface: Double2ReferenceMap
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 Double2ReferenceMap<V>
Specified by:
keySet in interface Map<Double,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: Double2ReferenceMap
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 Double2ReferenceMap<V>
Specified by:
values in interface Map<Double,V>
Returns:
a set view of the values contained in this map.
See Also:
Map.values()

clone

public Object clone()
Overrides:
clone in class Double2ReferenceFunctions.EmptyFunction<V>

isEmpty

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

entrySet

public ObjectSet<Map.Entry<Double,V>> entrySet()
Description copied from interface: Double2ReferenceMap
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 Double2ReferenceMap<V>
Specified by:
entrySet in interface Map<Double,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<Double,V>
Overrides:
hashCode in class Object

equals

public boolean equals(Object o)
Specified by:
equals in interface Map<Double,V>
Overrides:
equals in class Object

toString

public String toString()
Overrides:
toString in class Object


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