Interface RangeMap<K extends Comparable, V>

All Known Implementing Classes:
ImmutableRangeMap, TreeRangeMap
@Beta @GwtIncompatible public interface RangeMap<K extends 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

    Modifier and Type
    Method
    Description
    Map<Range<K>,V>
    asDescendingMapOfRanges()
    Returns a view of this range map as an unmodifiable Map<Range<K>, V>.
    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(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.
    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.
    String
    toString()
    Returns a readable string representation of this range map.

  • Method Details

    • 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 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.

    • 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

      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.

      The returned Map iterates over entries in ascending order of the bounds of the Range entries.

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

    • asDescendingMapOfRanges

      Map<Range<K>,V> asDescendingMapOfRanges()
      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.

      The returned Map iterates over entries in descending order of the bounds of the Range entries.

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

      Since:
      19.0

    • 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 Object o)
      Returns true if obj is another RangeMap that has an equivalent asMapOfRanges().
      Overrides:
      equals in class Object

    • hashCode

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

    • toString

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