Package com.google.common.collect

Interface RangeMap<K extends java.lang.Comparable,​V>

  • All Known Implementing Classes:
    ImmutableRangeMap, TreeRangeMap
    @Beta
public interface RangeMap<K extends java.lang.Comparable,​V>
    A mapping from disjoint nonempty ranges to non-null values. Queries look up the value associated with the range (if any) that contains a specified key.

    In contrast to RangeSet, no "coalescing" is done of connected ranges, even if they are mapped to the same value.

    Since:
    14.0

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      java.util.Map<Range<K>,​V> asMapOfRanges()
      Returns a view of this range map as an unmodifiable Map<Range<K>, V>.
      void clear()
      Removes all associations from this range map (optional operation).
      boolean equals​(java.lang.Object o)
      Returns true if obj is another RangeMap that has an equivalent asMapOfRanges().
      V get​(K key)
      Returns the value associated with the specified key, or null if there is no such value.
      java.util.Map.Entry<Range<K>,​V> getEntry​(K key)
      Returns the range containing this key and its associated value, if such a range is present in the range map, or null otherwise.
      int hashCode()
      Returns asMapOfRanges().hashCode().
      void put​(Range<K> range, V value)
      Maps a range to a specified value (optional operation).
      void putAll​(RangeMap<K,​V> rangeMap)
      Puts all the associations from rangeMap into this range map (optional operation).
      void remove​(Range<K> range)
      Removes all associations from this range map in the specified range (optional operation).
      Range<K> span()
      Returns the minimal range enclosing the ranges in this RangeMap.
      RangeMap<K,​V> subRangeMap​(Range<K> range)
      Returns a view of the part of this range map that intersects with range.
      java.lang.String toString()
      Returns a readable string representation of this range map.

    • Method Detail

      • get

        @Nullable
V get​(K key)
        Returns the value associated with the specified key, or null if there is no such value.

        Specifically, if any range in this range map contains the specified key, the value associated with that range is returned.

      • getEntry

        @Nullable
java.util.Map.Entry<Range<K>,​V> getEntry​(K key)
        Returns the range containing this key and its associated value, if such a range is present in the range map, or null otherwise.

      • span

        Range<K> span()
        Returns the minimal range enclosing the ranges in this RangeMap.
        Throws:
        NoSuchElementException - if this range map is empty

      • put

        void put​(Range<K> range,
         V value)
        Maps a range to a specified value (optional operation).

        Specifically, after a call to put(range, value), if range.contains(k), then get(k) will return value.

        If range is empty, then this is a no-op.

      • putAll

        void putAll​(RangeMap<K,​V> rangeMap)
        Puts all the associations from rangeMap into this range map (optional operation).

      • clear

        void clear()
        Removes all associations from this range map (optional operation).

      • remove

        void remove​(Range<K> range)
        Removes all associations from this range map in the specified range (optional operation).

        If !range.contains(k), get(k) will return the same result before and after a call to remove(range). If range.contains(k), then after a call to remove(range), get(k) will return null.

      • asMapOfRanges

        java.util.Map<Range<K>,​V> asMapOfRanges()
        Returns a view of this range map as an unmodifiable Map<Range<K>, V>. Modifications to this range map are guaranteed to read through to the returned Map.

        It is guaranteed that no empty ranges will be in the returned Map.

      • subRangeMap

        RangeMap<K,​V> subRangeMap​(Range<K> range)
        Returns a view of the part of this range map that intersects with range.

        For example, if rangeMap had the entries [1, 5] => "foo", (6, 8) => "bar", (10, ‥) => "baz" then rangeMap.subRangeMap(Range.open(3, 12)) would return a range map with the entries (3, 5) => "foo", (6, 8) => "bar", (10, 12) => "baz".

        The returned range map supports all optional operations that this range map supports, except for asMapOfRanges().iterator().remove().

        The returned range map will throw an IllegalArgumentException on an attempt to insert a range not enclosed by range.

      • equals

        boolean equals​(@Nullable
               java.lang.Object o)
        Returns true if obj is another RangeMap that has an equivalent asMapOfRanges().
        Overrides:
        equals in class java.lang.Object

      • hashCode

        int hashCode()
        Returns asMapOfRanges().hashCode().
        Overrides:
        hashCode in class java.lang.Object

      • toString

        java.lang.String toString()
        Returns a readable string representation of this range map.
        Overrides:
        toString in class java.lang.Object