it.unimi.dsi.fastutil.objects
Class Object2LongMaps.EmptyMap<K>

java.lang.Object
  extended by it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction<K>
      extended by it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction<K>
          extended by it.unimi.dsi.fastutil.objects.Object2LongMaps.EmptyMap<K>
All Implemented Interfaces:
Function<K,java.lang.Long>, Object2LongFunction<K>, Object2LongMap<K>, java.io.Serializable, java.lang.Cloneable, java.util.Map<K,java.lang.Long>
Direct Known Subclasses:
Object2LongSortedMaps.EmptySortedMap
Enclosing class:
Object2LongMaps

public static class Object2LongMaps.EmptyMap<K>
extends Object2LongFunctions.EmptyFunction<K>
implements Object2LongMap<K>, java.io.Serializable, java.lang.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.objects.Object2LongMap
Object2LongMap.Entry<K>, Object2LongMap.FastEntrySet<K>
 
Method Summary
 java.lang.Object clone()
           
 boolean containsValue(long v)
           
 boolean containsValue(java.lang.Object ov)
           
 ObjectSet<java.util.Map.Entry<K,java.lang.Long>> entrySet()
          Returns a set view of the mappings contained in this map.
 boolean equals(java.lang.Object o)
           
 int hashCode()
           
 boolean isEmpty()
           
 ObjectSet<K> keySet()
          Returns a set view of the keys contained in this map.
 ObjectSet<Object2LongMap.Entry<K>> object2LongEntrySet()
          Returns a type-specific set view of the mappings contained in this map.
 void putAll(java.util.Map<? extends K,? extends java.lang.Long> m)
           
 java.lang.String toString()
           
 LongCollection values()
          Returns a set view of the values contained in this map.
 
Methods inherited from class it.unimi.dsi.fastutil.objects.Object2LongFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, getLong, size
 
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction
get, put, put, remove, removeLong
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2LongFunction
defaultReturnValue, defaultReturnValue, getLong, put, removeLong
 
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
 

Method Detail

containsValue

public boolean containsValue(long v)
Specified by:
containsValue in interface Object2LongMap<K>
See Also:
Map.containsValue(Object)

putAll

public void putAll(java.util.Map<? extends K,? extends java.lang.Long> m)
Specified by:
putAll in interface java.util.Map<K,java.lang.Long>

object2LongEntrySet

public ObjectSet<Object2LongMap.Entry<K>> object2LongEntrySet()
Description copied from interface: Object2LongMap
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 Object2LongMap.entrySet() so that it returns an ObjectSet of objects of type Map.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:
object2LongEntrySet in interface Object2LongMap<K>
Returns:
a type-specific set view of the mappings contained in this map.
See Also:
Object2LongMap.entrySet()

keySet

public ObjectSet<K> keySet()
Description copied from interface: Object2LongMap
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 Object2LongMap<K>
Specified by:
keySet in interface java.util.Map<K,java.lang.Long>
Returns:
a set view of the keys contained in this map.
See Also:
Map.keySet()

values

public LongCollection values()
Description copied from interface: Object2LongMap
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 Object2LongMap<K>
Specified by:
values in interface java.util.Map<K,java.lang.Long>
Returns:
a set view of the values contained in this map.
See Also:
Map.values()

containsValue

public boolean containsValue(java.lang.Object ov)
Specified by:
containsValue in interface java.util.Map<K,java.lang.Long>

clone

public java.lang.Object clone()
Overrides:
clone in class Object2LongFunctions.EmptyFunction<K>

isEmpty

public boolean isEmpty()
Specified by:
isEmpty in interface java.util.Map<K,java.lang.Long>

entrySet

public ObjectSet<java.util.Map.Entry<K,java.lang.Long>> entrySet()
Description copied from interface: Object2LongMap
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 Object2LongMap<K>
Specified by:
entrySet in interface java.util.Map<K,java.lang.Long>
Returns:
a set view of the mappings contained in this map.
See Also:
Map.entrySet()

hashCode

public int hashCode()
Specified by:
hashCode in interface java.util.Map<K,java.lang.Long>
Overrides:
hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)
Specified by:
equals in interface java.util.Map<K,java.lang.Long>
Overrides:
equals in class java.lang.Object

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object