Package it.unimi.dsi.fastutil.objects

Interface Object2LongMap<K>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Interface Description
      static interface  Object2LongMap.Entry<K>
      A type-specific Map.Entry; provides some additional methods that use polymorphism to avoid (un)boxing.
      static interface  Object2LongMap.FastEntrySet<K>
      An entry set providing fast iteration.

    • Method Summary

      All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods 
      Modifier and Type Method Description
      default void clear()
      Removes all of the mappings from this map (optional operation).
      default long computeLong​(K key, java.util.function.BiFunction<? super K,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
      Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).
      default long computeLongIfAbsent​(K key, java.util.function.ToLongFunction<? super K> mappingFunction)
      If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map.
      default long computeLongIfAbsentPartial​(K key, Object2LongFunction<? super K> mappingFunction)
      If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map, unless the key is not present in the given mapping function.
      default long computeLongIfPresent​(K key, java.util.function.BiFunction<? super K,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
      If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
      boolean containsKey​(java.lang.Object key)
      Returns true if this function contains a mapping for the specified key.
      boolean containsValue​(long value)
      Returns true if this map maps one or more keys to the specified value.
      default boolean containsValue​(java.lang.Object value)
      Deprecated.
      Please use the corresponding type-specific method instead.
      long defaultReturnValue()
      Gets the default return value.
      void defaultReturnValue​(long rv)
      Sets the default return value (optional operation).
      default ObjectSet<java.util.Map.Entry<K,​java.lang.Long>> entrySet()
      Deprecated.
      Please use the corresponding type-specific method instead.
      default java.lang.Long get​(java.lang.Object key)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default long getOrDefault​(java.lang.Object key, long defaultValue)
      Returns the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.
      default java.lang.Long getOrDefault​(java.lang.Object key, java.lang.Long defaultValue)
      Deprecated.
      Please use the corresponding type-specific method instead.
      ObjectSet<K> keySet()
      default java.lang.Long merge​(K key, java.lang.Long value, java.util.function.BiFunction<? super java.lang.Long,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default long mergeLong​(K key, long value, java.util.function.BiFunction<? super java.lang.Long,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
      If the specified key is not already associated with a value, associates it with the given value.
      ObjectSet<Object2LongMap.Entry<K>> object2LongEntrySet()
      Returns a type-specific set view of the mappings contained in this map.
      default java.lang.Long put​(K key, java.lang.Long value)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default long putIfAbsent​(K key, long value)
      If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.
      default java.lang.Long putIfAbsent​(K key, java.lang.Long value)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default java.lang.Long remove​(java.lang.Object key)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default boolean remove​(java.lang.Object key, long value)
      Removes the entry for the specified key only if it is currently mapped to the specified value.
      default boolean remove​(java.lang.Object key, java.lang.Object value)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default long replace​(K key, long value)
      Replaces the entry for the specified key only if it is currently mapped to some value.
      default boolean replace​(K key, long oldValue, long newValue)
      Replaces the entry for the specified key only if currently mapped to the specified value.
      default java.lang.Long replace​(K key, java.lang.Long value)
      Deprecated.
      Please use the corresponding type-specific method instead.
      default boolean replace​(K key, java.lang.Long oldValue, java.lang.Long newValue)
      Deprecated.
      Please use the corresponding type-specific method instead.
      int size()
      Returns the number of key/value mappings in this map.
      LongCollection values()

      • Methods inherited from interface it.unimi.dsi.fastutil.Function

        apply

      • Methods inherited from interface java.util.function.Function

        andThen, compose

      • Methods inherited from interface java.util.Map

        compute, computeIfAbsent, computeIfPresent, equals, forEach, hashCode, isEmpty, putAll, replaceAll

    • Method Detail

      • size

        int size()
        Returns the number of key/value mappings in this map. If the map contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.
        Specified by:
        size in interface Function<K,​java.lang.Long>
        Specified by:
        size in interface java.util.Map<K,​java.lang.Long>
        Returns:
        the number of key-value mappings in this map.
        See Also:
        Size64

      • clear

        default void clear()
        Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.
        Specified by:
        clear in interface Function<K,​java.lang.Long>
        Specified by:
        clear in interface java.util.Map<K,​java.lang.Long>
        Throws:
        java.lang.UnsupportedOperationException - if the clear operation is not supported by this map
        See Also:
        Map.clear()

      • defaultReturnValue

        void defaultReturnValue​(long rv)
        Sets the default return value (optional operation). This value must be returned by type-specific versions of get(), put() and remove() to denote that the map does not contain the specified key. It must be 0/false by default.
        Specified by:
        defaultReturnValue in interface Object2LongFunction<K>
        Parameters:
        rv - the new default return value.
        See Also:
        defaultReturnValue()

      • defaultReturnValue

        long defaultReturnValue()
        Gets the default return value.
        Specified by:
        defaultReturnValue in interface Object2LongFunction<K>
        Returns:
        the current default return value.

      • object2LongEntrySet

        ObjectSet<Object2LongMap.Entry<K>> object2LongEntrySet()
        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).

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

      • entrySet

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

      • put

        @Deprecated
default java.lang.Long put​(K key,
                           java.lang.Long value)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Associates the specified value with the specified key in this function (optional operation).

        This default implementation just delegates to the corresponding type-specific–function method.

        Specified by:
        put in interface Function<K,​java.lang.Long>
        Specified by:
        put in interface java.util.Map<K,​java.lang.Long>
        Specified by:
        put in interface Object2LongFunction<K>
        Parameters:
        key - the key.
        value - the value.
        Returns:
        the old value, or null if no value was present for the given key.
        See Also:
        Map.put(Object,Object)

      • get

        @Deprecated
default java.lang.Long get​(java.lang.Object key)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Returns the value associated by this function to the specified key.

        This default implementation just delegates to the corresponding type-specific–function method.

        Specified by:
        get in interface Function<K,​java.lang.Long>
        Specified by:
        get in interface java.util.Map<K,​java.lang.Long>
        Specified by:
        get in interface Object2LongFunction<K>
        Parameters:
        key - the key.
        Returns:
        the corresponding value, or null if no value was present for the given key.
        See Also:
        Map.get(Object)

      • remove

        @Deprecated
default java.lang.Long remove​(java.lang.Object key)
        Deprecated.
        Please use the corresponding type-specific method instead.
        Removes this key and the associated value from this function if it is present (optional operation).

        This default implementation just delegates to the corresponding type-specific–function method.

        Specified by:
        remove in interface Function<K,​java.lang.Long>
        Specified by:
        remove in interface java.util.Map<K,​java.lang.Long>
        Specified by:
        remove in interface Object2LongFunction<K>
        Parameters:
        key - the key.
        Returns:
        the old value, or null if no value was present for the given key.
        See Also:
        Map.remove(Object)

      • keySet

        ObjectSet<K> keySet()

        Note that this specification strengthens the one given in Map.keySet().

        Specified by:
        keySet in interface java.util.Map<K,​java.lang.Long>
        Returns:
        a set view of the keys contained in this map.
        See Also:
        Map.keySet()

      • values

        LongCollection values()

        Note that this specification strengthens the one given in Map.values().

        Specified by:
        values in interface java.util.Map<K,​java.lang.Long>
        Returns:
        a set view of the values contained in this map.
        See Also:
        Map.values()

      • containsKey

        boolean containsKey​(java.lang.Object key)
        Returns true if this function contains a mapping for the specified key.
        Specified by:
        containsKey in interface Function<K,​java.lang.Long>
        Specified by:
        containsKey in interface java.util.Map<K,​java.lang.Long>
        Parameters:
        key - the key.
        Returns:
        true if this function associates a value to key.
        See Also:
        Map.containsKey(Object)

      • containsValue

        boolean containsValue​(long value)
        Returns true if this map maps one or more keys to the specified value.
        See Also:
        Map.containsValue(Object)

      • containsValue

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

      • getOrDefault

        default long getOrDefault​(java.lang.Object key,
                          long defaultValue)
        Returns the value to which the specified key is mapped, or the defaultValue if this map contains no mapping for the key.
        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.
        Since:
        8.0.0
        See Also:
        Map.getOrDefault(Object, Object)

      • putIfAbsent

        default long putIfAbsent​(K key,
                         long value)
        If the specified key is not already associated with a value, associates it with the given value and returns the default return value, else returns the current value.
        Parameters:
        key - key with which the specified value is to be associated.
        value - value to be associated with the specified key.
        Returns:
        the previous value associated with the specified key, or the default return value if there was no mapping for the key.
        Since:
        8.0.0
        See Also:
        Map.putIfAbsent(Object, Object)

      • remove

        default boolean remove​(java.lang.Object key,
                       long value)
        Removes the entry for the specified key only if it is currently mapped to the specified value.
        Parameters:
        key - key with which the specified value is associated.
        value - value expected to be associated with the specified key.
        Returns:
        true if the value was removed.
        Since:
        8.0.0
        See Also:
        Map.remove(Object, Object)

      • replace

        default boolean replace​(K key,
                        long oldValue,
                        long newValue)
        Replaces the entry for the specified key only if currently mapped to the specified value.
        Parameters:
        key - key with which the specified value is associated.
        oldValue - value expected to be associated with the specified key.
        newValue - value to be associated with the specified key.
        Returns:
        true if the value was replaced.
        Since:
        8.0.0
        See Also:
        Map.replace(Object, Object, Object)

      • replace

        default long replace​(K key,
                     long value)
        Replaces the entry for the specified key only if it is currently mapped to some value.
        Parameters:
        key - key with which the specified value is associated.
        value - value to be associated with the specified key.
        Returns:
        the previous value associated with the specified key, or the default return value if there was no mapping for the key.
        Since:
        8.0.0
        See Also:
        Map.replace(Object, Object)

      • computeLongIfAbsent

        default long computeLongIfAbsent​(K key,
                                 java.util.function.ToLongFunction<? super K> mappingFunction)
        If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map.

        Note that contrarily to the default computeIfAbsent(), it is not possible to not add a value for a given key, since the mappingFunction cannot return null. If such a behavior is needed, please use the corresponding nullable version.

        Parameters:
        key - key with which the specified value is to be associated.
        mappingFunction - the function to compute a value.
        Returns:
        the current (existing or computed) value associated with the specified key.
        Since:
        8.0.0
        See Also:
        Map.computeIfAbsent(Object, java.util.function.Function)

      • computeLongIfAbsentPartial

        default long computeLongIfAbsentPartial​(K key,
                                        Object2LongFunction<? super K> mappingFunction)
        If the specified key is not already associated with a value, attempts to compute its value using the given mapping function and enters it into this map, unless the key is not present in the given mapping function.

        This version of computeIfAbsent() uses a type-specific version of fastutil's Function. Since Function has a containsKey() method, it is possible to avoid adding a key by having containsKey() return false for that key.

        Parameters:
        key - key with which the specified value is to be associated.
        mappingFunction - the function to compute a value.
        Returns:
        the current (existing or computed) value associated with the specified key.
        Since:
        8.0.0
        See Also:
        Map.computeIfAbsent(Object, java.util.function.Function)

      • computeLongIfPresent

        default long computeLongIfPresent​(K key,
                                  java.util.function.BiFunction<? super K,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
        If the value for the specified key is present, attempts to compute a new mapping given the key and its current mapped value.
        Parameters:
        key - key with which the specified value is to be associated.
        remappingFunction - the function to compute a value.
        Returns:
        the new value associated with the specified key, or the default return value if none.
        Since:
        8.0.0
        See Also:
        Map.computeIfPresent(Object, java.util.function.BiFunction)

      • computeLong

        default long computeLong​(K key,
                         java.util.function.BiFunction<? super K,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
        Attempts to compute a mapping for the specified key and its current mapped value (or null if there is no current mapping).

        If the function returns null, the mapping is removed (or remains absent if initially absent). If the function itself throws an (unchecked) exception, the exception is rethrown, and the current mapping is left unchanged.

        Parameters:
        key - key with which the specified value is to be associated.
        remappingFunction - the function to compute a value.
        Returns:
        the new value associated with the specified key, or the default return value if none.
        Since:
        8.0.0
        See Also:
        Map.compute(Object, java.util.function.BiFunction)

      • mergeLong

        default long mergeLong​(K key,
                       long value,
                       java.util.function.BiFunction<? super java.lang.Long,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
        If the specified key is not already associated with a value, associates it with the given value. Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result is null.
        Parameters:
        key - key with which the resulting value is to be associated.
        value - the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.
        remappingFunction - the function to recompute a value if present.
        Returns:
        the new value associated with the specified key, or the default return value if no value is associated with the key.
        Since:
        8.0.0
        See Also:
        Map.merge(Object, Object, java.util.function.BiFunction)

      • getOrDefault

        @Deprecated
default java.lang.Long getOrDefault​(java.lang.Object key,
                                    java.lang.Long defaultValue)
        Deprecated.
        Please use the corresponding type-specific method instead.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        getOrDefault in interface java.util.Map<K,​java.lang.Long>

      • putIfAbsent

        @Deprecated
default java.lang.Long putIfAbsent​(K key,
                                   java.lang.Long value)
        Deprecated.
        Please use the corresponding type-specific method instead.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        putIfAbsent in interface java.util.Map<K,​java.lang.Long>

      • remove

        @Deprecated
default boolean remove​(java.lang.Object key,
                       java.lang.Object value)
        Deprecated.
        Please use the corresponding type-specific method instead.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        remove in interface java.util.Map<K,​java.lang.Long>

      • replace

        @Deprecated
default boolean replace​(K key,
                        java.lang.Long oldValue,
                        java.lang.Long newValue)
        Deprecated.
        Please use the corresponding type-specific method instead.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        replace in interface java.util.Map<K,​java.lang.Long>

      • replace

        @Deprecated
default java.lang.Long replace​(K key,
                               java.lang.Long value)
        Deprecated.
        Please use the corresponding type-specific method instead.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        replace in interface java.util.Map<K,​java.lang.Long>

      • merge

        @Deprecated
default java.lang.Long merge​(K key,
                             java.lang.Long value,
                             java.util.function.BiFunction<? super java.lang.Long,​? super java.lang.Long,​? extends java.lang.Long> remappingFunction)
        Deprecated.
        Please use the corresponding type-specific method instead.

        This default implementation just delegates to the corresponding Map method.

        Specified by:
        merge in interface java.util.Map<K,​java.lang.Long>