Package it.unimi.dsi.fastutil.objects

Class Reference2LongMaps.SynchronizedMap<K>

    • Method Detail

      • putAll

        public void putAll​(Map<? extends K,​? extends Long> m)
        Specified by:
        putAll in interface Map<K,​Long>

      • reference2LongEntrySet

        public ObjectSet<Reference2LongMap.Entry<K>> reference2LongEntrySet()
        Description copied from interface: Reference2LongMap
        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:
        reference2LongEntrySet in interface Reference2LongMap<K>
        Returns:
        a type-specific set view of the mappings contained in this map.
        See Also:
        Map.entrySet()

      • isEmpty

        public boolean isEmpty()
        Specified by:
        isEmpty in interface Map<K,​Long>

      • getOrDefault

        public long getOrDefault​(Object key,
                         long defaultValue)
        Description copied from interface: Reference2LongMap
        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 Reference2LongMap<K>
        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)

      • putIfAbsent

        public long putIfAbsent​(K key,
                        long value)
        Description copied from interface: Reference2LongMap
        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.
        Specified by:
        putIfAbsent in interface Reference2LongMap<K>
        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.
        See Also:
        Map.putIfAbsent(Object, Object)

      • remove

        public boolean remove​(Object key,
                      long value)
        Description copied from interface: Reference2LongMap
        Removes the entry for the specified key only if it is currently mapped to the specified value.
        Specified by:
        remove in interface Reference2LongMap<K>
        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.
        See Also:
        Map.remove(Object, Object)

      • replace

        public long replace​(K key,
                    long value)
        Description copied from interface: Reference2LongMap
        Replaces the entry for the specified key only if it is currently mapped to some value.
        Specified by:
        replace in interface Reference2LongMap<K>
        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.
        See Also:
        Map.replace(Object, Object)

      • replace

        public boolean replace​(K key,
                       long oldValue,
                       long newValue)
        Description copied from interface: Reference2LongMap
        Replaces the entry for the specified key only if currently mapped to the specified value.
        Specified by:
        replace in interface Reference2LongMap<K>
        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.
        See Also:
        Map.replace(Object, Object, Object)

      • computeLongIfAbsent

        public long computeLongIfAbsent​(K key,
                                ToLongFunction<? super K> mappingFunction)
        Description copied from interface: Reference2LongMap
        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.

        Specified by:
        computeLongIfAbsent in interface Reference2LongMap<K>
        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.
        See Also:
        Map.computeIfAbsent(Object, java.util.function.Function)

      • computeLongIfAbsentPartial

        public long computeLongIfAbsentPartial​(K key,
                                       Reference2LongFunction<? super K> mappingFunction)
        Description copied from interface: Reference2LongMap
        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.

        Specified by:
        computeLongIfAbsentPartial in interface Reference2LongMap<K>
        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.
        See Also:
        Map.computeIfAbsent(Object, java.util.function.Function)

      • computeLong

        public long computeLong​(K key,
                        BiFunction<? super K,​? super Long,​? extends Long> remappingFunction)
        Description copied from interface: Reference2LongMap
        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.

        Specified by:
        computeLong in interface Reference2LongMap<K>
        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.
        See Also:
        Map.compute(Object, java.util.function.BiFunction)

      • mergeLong

        public long mergeLong​(K key,
                      long value,
                      BiFunction<? super Long,​? super Long,​? extends Long> remappingFunction)
        Description copied from interface: Reference2LongMap
        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.
        Specified by:
        mergeLong in interface Reference2LongMap<K>
        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.
        See Also:
        Map.merge(Object, Object, java.util.function.BiFunction)

      • remove

        @Deprecated
public boolean remove​(Object key,
                      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 Map<K,​Long>
        Specified by:
        remove in interface Reference2LongMap<K>

      • replace

        @Deprecated
public Long replace​(K key,
                    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 Map<K,​Long>
        Specified by:
        replace in interface Reference2LongMap<K>

      • replace

        @Deprecated
public boolean replace​(K key,
                       Long oldValue,
                       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 Map<K,​Long>
        Specified by:
        replace in interface Reference2LongMap<K>