it.unimi.dsi.fastutil.objects
Interface Reference2DoubleMap<K>

All Superinterfaces:
Function<K,java.lang.Double>, java.util.Map<K,java.lang.Double>, Reference2DoubleFunction<K>
All Known Subinterfaces:
Reference2DoubleSortedMap<K>
All Known Implementing Classes:
AbstractReference2DoubleMap, AbstractReference2DoubleSortedMap, Reference2DoubleArrayMap, Reference2DoubleLinkedOpenHashMap, Reference2DoubleMaps.EmptyMap, Reference2DoubleMaps.Singleton, Reference2DoubleMaps.SynchronizedMap, Reference2DoubleMaps.UnmodifiableMap, Reference2DoubleOpenHashMap, Reference2DoubleSortedMaps.EmptySortedMap, Reference2DoubleSortedMaps.Singleton, Reference2DoubleSortedMaps.SynchronizedSortedMap, Reference2DoubleSortedMaps.UnmodifiableSortedMap

public interface Reference2DoubleMap<K>
extends Reference2DoubleFunction<K>, java.util.Map<K,java.lang.Double>

A type-specific Map; provides some additional methods that use polymorphism to avoid (un)boxing, and handling of a default return value.

Besides extending the corresponding type-specific function, this interface strengthens entrySet(), keySet() and values(). Maps returning entry sets of type Reference2DoubleMap.FastEntrySet support also fast iteration.

A submap or subset may or may not have an independent default return value (which however must be initialized to the default return value of the originator).

See Also:
Map

Nested Class Summary
static interface Reference2DoubleMap.Entry<K>
          A type-specific Map.Entry; provides some additional methods that use polymorphism to avoid (un)boxing.
static interface Reference2DoubleMap.FastEntrySet<K>
          An entry set providing fast iteration.
 
Method Summary
 boolean containsValue(double value)
           
 ObjectSet<java.util.Map.Entry<K,java.lang.Double>> entrySet()
          Returns a set view of the mappings contained in this map.
 ReferenceSet<K> keySet()
          Returns a set view of the keys contained in this map.
 ObjectSet<Reference2DoubleMap.Entry<K>> reference2DoubleEntrySet()
          Returns a type-specific set view of the mappings contained in this map.
 DoubleCollection values()
          Returns a set view of the values contained in this map.
 
Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2DoubleFunction
defaultReturnValue, defaultReturnValue, getDouble, put, removeDouble
 
Methods inherited from interface it.unimi.dsi.fastutil.Function
clear, containsKey, get, put, remove, size
 
Methods inherited from interface java.util.Map
clear, containsKey, containsValue, equals, get, hashCode, isEmpty, put, putAll, remove, size
 

Method Detail

entrySet

ObjectSet<java.util.Map.Entry<K,java.lang.Double>> entrySet()
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 java.util.Map<K,java.lang.Double>
Returns:
a set view of the mappings contained in this map.
See Also:
Map.entrySet()

reference2DoubleEntrySet

ObjectSet<Reference2DoubleMap.Entry<K>> reference2DoubleEntrySet()
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 entrySet() so that it returns an ObjectSet of objects of type Reference2DoubleMap.Entry (the latter makes it possible to access keys and values with type-specific methods).

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

keySet

ReferenceSet<K> keySet()
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 java.util.Map<K,java.lang.Double>
Returns:
a set view of the keys contained in this map.
See Also:
Map.keySet()

values

DoubleCollection values()
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 java.util.Map<K,java.lang.Double>
Returns:
a set view of the values contained in this map.
See Also:
Map.values()

containsValue

boolean containsValue(double value)
See Also:
Map.containsValue(Object)