Package it.unimi.dsi.fastutil.objects

Class Reference2IntMaps.Singleton<K>

java.lang.Object
it.unimi.dsi.fastutil.objects.AbstractReference2IntFunction<K>
it.unimi.dsi.fastutil.objects.Reference2IntFunctions.Singleton<K>
it.unimi.dsi.fastutil.objects.Reference2IntMaps.Singleton<K>
All Implemented Interfaces:
Function<K,​java.lang.Integer>, Reference2IntFunction<K>, Reference2IntMap<K>, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<K,​java.lang.Integer>, java.util.function.ToIntFunction<K>, java.util.Map<K,​java.lang.Integer>
Direct Known Subclasses:
Reference2IntSortedMaps.Singleton
Enclosing class:
Reference2IntMaps
public static class Reference2IntMaps.Singleton<K>
extends Reference2IntFunctions.Singleton<K>
implements Reference2IntMap<K>, java.io.Serializable, java.lang.Cloneable
An immutable class representing a type-specific singleton map.

This class may be useful to implement your own in case you subclass a type-specific map.

See Also:
Serialized Form

  • Method Details

    • containsValue

      public boolean containsValue​(int v)
      Description copied from interface: Reference2IntMap
      Returns true if this map maps one or more keys to the specified value.
      Specified by:
      containsValue in interface Reference2IntMap<K>
      See Also:
      Map.containsValue(Object)

    • containsValue

      @Deprecated public boolean containsValue​(java.lang.Object ov)
      Deprecated.
      Please use the corresponding type-specific method instead.
      Specified by:
      containsValue in interface java.util.Map<K,​java.lang.Integer>
      Specified by:
      containsValue in interface Reference2IntMap<K>

    • putAll

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

    • reference2IntEntrySet

      public ObjectSet<Reference2IntMap.Entry<K>> reference2IntEntrySet()
      Description copied from interface: Reference2IntMap
      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 Map.entrySet() so that it returns an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).

      Specified by:
      reference2IntEntrySet in interface Reference2IntMap<K>
      Returns:
      a type-specific set view of the mappings contained in this map.
      See Also:
      Map.entrySet()

    • entrySet

      @Deprecated public ObjectSet<java.util.Map.Entry<K,​java.lang.Integer>> entrySet()
      Deprecated.
      Please use the corresponding type-specific method instead.
      Returns a set view of the mappings contained in this map.
      Specified by:
      entrySet in interface java.util.Map<K,​java.lang.Integer>
      Specified by:
      entrySet in interface Reference2IntMap<K>
      Returns:
      a set view of the mappings contained in this map.
      See Also:
      Map.entrySet()

    • keySet

      public ReferenceSet<K> keySet()
      Description copied from interface: Reference2IntMap
      Specified by:
      keySet in interface java.util.Map<K,​java.lang.Integer>
      Specified by:
      keySet in interface Reference2IntMap<K>
      Returns:
      a set view of the keys contained in this map.
      See Also:
      Map.keySet()

    • values

      public IntCollection values()
      Description copied from interface: Reference2IntMap
      Specified by:
      values in interface java.util.Map<K,​java.lang.Integer>
      Specified by:
      values in interface Reference2IntMap<K>
      Returns:
      a set view of the values contained in this map.
      See Also:
      Map.values()

    • isEmpty

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

    • hashCode

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

    • toString

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