Package it.unimi.dsi.fastutil.longs

Class Long2ReferenceMaps.EmptyMap<V>

java.lang.Object
it.unimi.dsi.fastutil.longs.AbstractLong2ReferenceFunction<V>
it.unimi.dsi.fastutil.longs.Long2ReferenceFunctions.EmptyFunction<V>
it.unimi.dsi.fastutil.longs.Long2ReferenceMaps.EmptyMap<V>
All Implemented Interfaces:
it.unimi.dsi.fastutil.Function<java.lang.Long,​V>, it.unimi.dsi.fastutil.longs.Long2ReferenceFunction<V>, Long2ReferenceMap<V>, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<java.lang.Long,​V>, java.util.function.LongFunction<V>, java.util.Map<java.lang.Long,​V>
Direct Known Subclasses:
Long2ReferenceSortedMaps.EmptySortedMap
Enclosing class:
Long2ReferenceMaps
public static class Long2ReferenceMaps.EmptyMap<V>
extends Long2ReferenceFunctions.EmptyFunction<V>
implements Long2ReferenceMap<V>, 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

  • Method Details

    • containsValue

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

    • getOrDefault

      @Deprecated public V getOrDefault​(java.lang.Object key, V defaultValue)
      Deprecated.
      Description copied from interface: Long2ReferenceMap

      This default implementation just delegates to the corresponding Map method.

      Specified by:
      getOrDefault in interface it.unimi.dsi.fastutil.Function<java.lang.Long,​V>
      Specified by:
      getOrDefault in interface it.unimi.dsi.fastutil.longs.Long2ReferenceFunction<V>
      Specified by:
      getOrDefault in interface Long2ReferenceMap<V>
      Specified by:
      getOrDefault in interface java.util.Map<java.lang.Long,​V>

    • getOrDefault

      public V getOrDefault​(long key, V defaultValue)
      Description copied from interface: Long2ReferenceMap
      Returns the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.
      Specified by:
      getOrDefault in interface it.unimi.dsi.fastutil.longs.Long2ReferenceFunction<V>
      Specified by:
      getOrDefault in interface Long2ReferenceMap<V>
      Overrides:
      getOrDefault in class Long2ReferenceFunctions.EmptyFunction<V>
      Parameters:
      key - the key.
      defaultValue - the default mapping of the key.
      Returns:
      the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.
      See Also:
      Map.getOrDefault(Object, Object)

    • putAll

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

    • long2ReferenceEntrySet

      public it.unimi.dsi.fastutil.objects.ObjectSet<Long2ReferenceMap.Entry<V>> long2ReferenceEntrySet()
      Description copied from interface: Long2ReferenceMap
      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:
      long2ReferenceEntrySet in interface Long2ReferenceMap<V>
      Returns:
      a type-specific set view of the mappings contained in this map.
      See Also:
      Map.entrySet()

    • keySet

      public it.unimi.dsi.fastutil.longs.LongSet keySet()
      Description copied from interface: Long2ReferenceMap
      Specified by:
      keySet in interface Long2ReferenceMap<V>
      Specified by:
      keySet in interface java.util.Map<java.lang.Long,​V>
      Returns:
      a set view of the keys contained in this map.
      See Also:
      Map.keySet()

    • values

      public ReferenceCollection<V> values()
      Description copied from interface: Long2ReferenceMap
      Specified by:
      values in interface Long2ReferenceMap<V>
      Specified by:
      values in interface java.util.Map<java.lang.Long,​V>
      Returns:
      a set view of the values contained in this map.
      See Also:
      Map.values()

    • forEach

      public void forEach​(java.util.function.BiConsumer<? super java.lang.Long,​? super V> consumer)
      Specified by:
      forEach in interface Long2ReferenceMap<V>
      Specified by:
      forEach in interface java.util.Map<java.lang.Long,​V>

    • clone

      public java.lang.Object clone()
      Overrides:
      clone in class Long2ReferenceFunctions.EmptyFunction<V>

    • isEmpty

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

    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface java.util.Map<java.lang.Long,​V>
      Overrides:
      hashCode in class Long2ReferenceFunctions.EmptyFunction<V>

    • equals

      public boolean equals​(java.lang.Object o)
      Specified by:
      equals in interface java.util.Map<java.lang.Long,​V>
      Overrides:
      equals in class Long2ReferenceFunctions.EmptyFunction<V>

    • toString

      public java.lang.String toString()
      Overrides:
      toString in class Long2ReferenceFunctions.EmptyFunction<V>