Class Long2LongMaps.EmptyMap

  • All Implemented Interfaces:
    Function<java.lang.Long,​java.lang.Long>, Long2LongFunction, Long2LongMap, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<java.lang.Long,​java.lang.Long>, java.util.function.LongUnaryOperator, java.util.Map<java.lang.Long,​java.lang.Long>
    Direct Known Subclasses:
    Long2LongSortedMaps.EmptySortedMap
    Enclosing class:
    Long2LongMaps

    public static class Long2LongMaps.EmptyMap
    extends Long2LongFunctions.EmptyFunction
    implements Long2LongMap, 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 Detail

      • containsValue

        public boolean containsValue​(long v)
        Description copied from interface: Long2LongMap
        Returns true if this map maps one or more keys to the specified value.
        Specified by:
        containsValue in interface Long2LongMap
        See Also:
        Map.containsValue(Object)
      • getOrDefault

        @Deprecated
        public java.lang.Long getOrDefault​(java.lang.Object key,
                                           java.lang.Long defaultValue)
        Deprecated.
        Description copied from interface: Long2LongMap
        Returns the value associated by this function to the specified key, or give the specified value if not present.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        getOrDefault in interface Function<java.lang.Long,​java.lang.Long>
        Specified by:
        getOrDefault in interface Long2LongFunction
        Specified by:
        getOrDefault in interface Long2LongMap
        Specified by:
        getOrDefault in interface java.util.Map<java.lang.Long,​java.lang.Long>
        Parameters:
        key - the key.
        defaultValue - the default value to return if not present.
        Returns:
        the corresponding value, or defaultValue if no value was present for the given key.
        See Also:
        Map.getOrDefault(Object, Object)
      • containsValue

        @Deprecated
        public boolean containsValue​(java.lang.Object ov)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Specified by:
        containsValue in interface Long2LongMap
        Specified by:
        containsValue in interface java.util.Map<java.lang.Long,​java.lang.Long>
      • putAll

        public void putAll​(java.util.Map<? extends java.lang.Long,​? extends java.lang.Long> m)
        Specified by:
        putAll in interface java.util.Map<java.lang.Long,​java.lang.Long>
      • long2LongEntrySet

        public ObjectSet<Long2LongMap.Entry> long2LongEntrySet()
        Description copied from interface: Long2LongMap
        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:
        long2LongEntrySet in interface Long2LongMap
        Returns:
        a type-specific set view of the mappings contained in this map.
        See Also:
        Map.entrySet()
      • keySet

        public LongSet keySet()
        Description copied from interface: Long2LongMap
        Specified by:
        keySet in interface Long2LongMap
        Specified by:
        keySet in interface java.util.Map<java.lang.Long,​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: Long2LongMap
        Specified by:
        values in interface Long2LongMap
        Specified by:
        values in interface java.util.Map<java.lang.Long,​java.lang.Long>
        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 java.lang.Long> consumer)
        Specified by:
        forEach in interface Long2LongMap
        Specified by:
        forEach in interface java.util.Map<java.lang.Long,​java.lang.Long>
      • isEmpty

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

        public boolean equals​(java.lang.Object o)
        Specified by:
        equals in interface java.util.Map<java.lang.Long,​java.lang.Long>
        Overrides:
        equals in class Long2LongFunctions.EmptyFunction