it.unimi.dsi.fastutil.ints
Class Int2IntMaps.EmptyMap

java.lang.Object
  extended by it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction
      extended by it.unimi.dsi.fastutil.ints.Int2IntFunctions.EmptyFunction
          extended by it.unimi.dsi.fastutil.ints.Int2IntMaps.EmptyMap
All Implemented Interfaces:
Function<Integer,Integer>, Int2IntFunction, Int2IntMap, Serializable, Cloneable, Map<Integer,Integer>
Direct Known Subclasses:
Int2IntSortedMaps.EmptySortedMap
Enclosing class:
Int2IntMaps

public static class Int2IntMaps.EmptyMap
extends Int2IntFunctions.EmptyFunction
implements Int2IntMap, 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.ints.Int2IntMap
Int2IntMap.Entry, Int2IntMap.FastEntrySet
 
Field Summary
static long serialVersionUID
           
 
Fields inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction
defRetValue
 
Constructor Summary
protected Int2IntMaps.EmptyMap()
           
 
Method Summary
 Object clone()
           
 boolean containsValue(int v)
           
 boolean containsValue(Object ov)
           
 ObjectSet<Map.Entry<Integer,Integer>> entrySet()
          Returns a set view of the mappings contained in this map.
 boolean equals(Object o)
           
 int hashCode()
           
 ObjectSet<Int2IntMap.Entry> int2IntEntrySet()
          Returns a type-specific set view of the mappings contained in this map.
 boolean isEmpty()
           
 IntSet keySet()
          Returns a set view of the keys contained in this map.
 void putAll(Map<? extends Integer,? extends Integer> m)
           
 String toString()
           
 IntCollection values()
          Returns a set view of the values contained in this map.
 
Methods inherited from class it.unimi.dsi.fastutil.ints.Int2IntFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, get, get, size
 
Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction
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.ints.Int2IntFunction
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

Int2IntMaps.EmptyMap

protected Int2IntMaps.EmptyMap()
Method Detail

containsValue

public boolean containsValue(int v)
Specified by:
containsValue in interface Int2IntMap
See Also:
Map.containsValue(Object)

putAll

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

int2IntEntrySet

public ObjectSet<Int2IntMap.Entry> int2IntEntrySet()
Description copied from interface: Int2IntMap
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 Int2IntMap.entrySet() so that it returns an ObjectSet of objects of type Int2IntMap.Entry (the latter makes it possible to access keys and values with type-specific methods).

Specified by:
int2IntEntrySet in interface Int2IntMap
Returns:
a type-specific set view of the mappings contained in this map.
See Also:
Int2IntMap.entrySet()

keySet

public IntSet keySet()
Description copied from interface: Int2IntMap
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 Int2IntMap
Specified by:
keySet in interface Map<Integer,Integer>
Returns:
a set view of the keys contained in this map.
See Also:
Map.keySet()

values

public IntCollection values()
Description copied from interface: Int2IntMap
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 Int2IntMap
Specified by:
values in interface Map<Integer,Integer>
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<Integer,Integer>

clone

public Object clone()
Overrides:
clone in class Int2IntFunctions.EmptyFunction

isEmpty

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

entrySet

public ObjectSet<Map.Entry<Integer,Integer>> entrySet()
Description copied from interface: Int2IntMap
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 Int2IntMap
Specified by:
entrySet in interface Map<Integer,Integer>
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<Integer,Integer>
Overrides:
hashCode in class Object

equals

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

toString

public String toString()
Overrides:
toString in class Object


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