it.unimi.dsi.fastutil.longs
Class Long2DoubleMaps.EmptyMap

java.lang.Object
  extended by it.unimi.dsi.fastutil.longs.AbstractLong2DoubleFunction
      extended by it.unimi.dsi.fastutil.longs.Long2DoubleFunctions.EmptyFunction
          extended by it.unimi.dsi.fastutil.longs.Long2DoubleMaps.EmptyMap
All Implemented Interfaces:
Function<Long,Double>, Long2DoubleFunction, Long2DoubleMap, Serializable, Cloneable, Map<Long,Double>
Direct Known Subclasses:
Long2DoubleSortedMaps.EmptySortedMap
Enclosing class:
Long2DoubleMaps

public static class Long2DoubleMaps.EmptyMap
extends Long2DoubleFunctions.EmptyFunction
implements Long2DoubleMap, 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.longs.Long2DoubleMap
Long2DoubleMap.Entry, Long2DoubleMap.FastEntrySet
 
Field Summary
static long serialVersionUID
           
 
Method Summary
 Object clone()
           
 boolean containsValue(double v)
           
 boolean containsValue(Object ov)
           
 ObjectSet<Map.Entry<Long,Double>> entrySet()
          Returns a set view of the mappings contained in this map.
 boolean equals(Object o)
           
 int hashCode()
           
 boolean isEmpty()
           
 LongSet keySet()
          Returns a set view of the keys contained in this map.
 ObjectSet<Long2DoubleMap.Entry> long2DoubleEntrySet()
          Returns a type-specific set view of the mappings contained in this map.
 void putAll(Map<? extends Long,? extends Double> m)
           
 String toString()
           
 DoubleCollection values()
          Returns a set view of the values contained in this map.
 
Methods inherited from class it.unimi.dsi.fastutil.longs.Long2DoubleFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, size
 
Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2DoubleFunction
containsKey, put, put, remove, remove
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2DoubleFunction
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
Method Detail

containsValue

public boolean containsValue(double v)
Specified by:
containsValue in interface Long2DoubleMap
See Also:
Map.containsValue(Object)

putAll

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

long2DoubleEntrySet

public ObjectSet<Long2DoubleMap.Entry> long2DoubleEntrySet()
Description copied from interface: Long2DoubleMap
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 Long2DoubleMap.entrySet() so that it returns an ObjectSet of objects of type Long2DoubleMap.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:
long2DoubleEntrySet in interface Long2DoubleMap
Returns:
a type-specific set view of the mappings contained in this map.
See Also:
Long2DoubleMap.entrySet()

keySet

public LongSet keySet()
Description copied from interface: Long2DoubleMap
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 Long2DoubleMap
Specified by:
keySet in interface Map<Long,Double>
Returns:
a set view of the keys contained in this map.
See Also:
Map.keySet()

values

public DoubleCollection values()
Description copied from interface: Long2DoubleMap
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 Long2DoubleMap
Specified by:
values in interface Map<Long,Double>
Returns:
a set view of the values contained in this map.
See Also:
Map.values()

containsValue

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

clone

public Object clone()
Overrides:
clone in class Long2DoubleFunctions.EmptyFunction

isEmpty

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

entrySet

public ObjectSet<Map.Entry<Long,Double>> entrySet()
Description copied from interface: Long2DoubleMap
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 Long2DoubleMap
Specified by:
entrySet in interface Map<Long,Double>
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<Long,Double>
Overrides:
hashCode in class Object

equals

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

toString

public String toString()
Overrides:
toString in class Object