Interface RangeSet<C extends Comparable>

All Known Implementing Classes:

ImmutableRangeSet, TreeRangeSet

@DoNotMock("Use ImmutableRangeSet or TreeRangeSet")
@GwtIncompatible
public interface RangeSet<C extends Comparable>

A set comprising zero or more nonempty, disconnected ranges of type C.

Implementations that choose to support the add(Range) operation are required to ignore empty ranges and coalesce connected ranges. For example:

RangeSet<Integer> rangeSet = TreeRangeSet.create();
rangeSet.add(Range.closed(1, 10)); // {[1, 10]}
rangeSet.add(Range.closedOpen(11, 15)); // disconnected range; {[1, 10], [11, 15)}
rangeSet.add(Range.closedOpen(15, 20)); // connected range; {[1, 10], [11, 20)}
rangeSet.add(Range.openClosed(0, 0)); // empty range; {[1, 10], [11, 20)}
rangeSet.remove(Range.open(5, 10)); // splits [1, 10]; {[1, 5], [10, 10], [11, 20)}

Note that the behavior of Range.isEmpty() and Range.isConnected(Range) may not be as expected on discrete ranges. See the Javadoc of those methods for details.

For a Set whose contents are specified by a Range, see ContiguousSet.

See the Guava User Guide article on RangeSets.

Since:

14.0

Author:

Kevin Bourrillion, Louis Wasserman

Method Summary

Modifier and Type	Method	Description
void	add(Range<C> range)	Adds the specified range to this RangeSet (optional operation).
void	addAll(RangeSet<C> other)	Adds all of the ranges from the specified range set to this range set (optional operation).
default void	addAll(Iterable<Range<C>> ranges)	Adds all of the specified ranges to this range set (optional operation).
Set<Range<C>>	asDescendingSetOfRanges()	Returns a descending view of the disconnected ranges that make up this range set.
Set<Range<C>>	asRanges()	Returns a view of the disconnected ranges that make up this range set.
void	clear()	Removes all ranges from this RangeSet (optional operation).
RangeSet<C>	complement()	Returns a view of the complement of this RangeSet.
boolean	contains(C value)	Determines whether any of this range set's member ranges contains value.
boolean	encloses(Range<C> otherRange)	Returns true if there exists a member range in this range set which encloses the specified range.
boolean	enclosesAll(RangeSet<C> other)	Returns true if for each member range in other there exists a member range in this range set which encloses it.
default boolean	enclosesAll(Iterable<Range<C>> other)	Returns true if for each range in other there exists a member range in this range set which encloses it.
boolean	equals(@Nullable Object obj)	Returns true if obj is another RangeSet that contains the same ranges according to Range.equals(Object).
int	hashCode()	Returns asRanges().hashCode().
boolean	intersects(Range<C> otherRange)	Returns true if there exists a non-empty range enclosed by both a member range in this range set and the specified range.
boolean	isEmpty()	Returns true if this range set contains no ranges.
@Nullable Range<C>	rangeContaining(C value)	Returns the unique range from this range set that contains value, or null if this range set does not contain value.
void	remove(Range<C> range)	Removes the specified range from this RangeSet (optional operation).
void	removeAll(RangeSet<C> other)	Removes all of the ranges from the specified range set from this range set (optional operation).
default void	removeAll(Iterable<Range<C>> ranges)	Removes all of the specified ranges from this range set (optional operation).
Range<C>	span()	Returns the minimal range which encloses all ranges in this range set.
RangeSet<C>	subRangeSet(Range<C> view)	Returns a view of the intersection of this RangeSet with the specified range.
String	toString()	Returns a readable string representation of this range set.

Method Details

contains

boolean contains(C value)

Determines whether any of this range set's member ranges contains value.

rangeContaining

@Nullable Range<C> rangeContaining(C value)

Returns the unique range from this range set that contains value, or null if this range set does not contain value.

intersects

boolean intersects(Range<C> otherRange)

Returns true if there exists a non-empty range enclosed by both a member range in this range set and the specified range. This is equivalent to calling subRangeSet(otherRange) and testing whether the resulting range set is non-empty.

Since:

20.0

encloses

boolean encloses(Range<C> otherRange)

Returns true if there exists a member range in this range set which encloses the specified range.

enclosesAll

boolean enclosesAll(RangeSet<C> other)

Returns true if for each member range in other there exists a member range in this range set which encloses it. It follows that this.contains(value) whenever other.contains(value). Returns true if other is empty.

This is equivalent to checking if this range set encloses(com.google.common.collect.Range<C>) each of the ranges in other.

enclosesAll

default boolean enclosesAll(Iterable<Range<C>> other)

Returns true if for each range in other there exists a member range in this range set which encloses it. Returns true if other is empty.

This is equivalent to checking if this range set encloses(com.google.common.collect.Range<C>) each range in other.

Since:

21.0

isEmpty

boolean isEmpty()

Returns true if this range set contains no ranges.

span

Range<C> span()

Returns the minimal range which encloses all ranges in this range set.

Throws:

NoSuchElementException - if this range set is empty

asRanges

Set<Range<C>> asRanges()

Returns a view of the disconnected ranges that make up this range set. The returned set may be empty. The iterators returned by its Iterable.iterator() method return the ranges in increasing order of lower bound (equivalently, of upper bound).

asDescendingSetOfRanges

Set<Range<C>> asDescendingSetOfRanges()

Returns a descending view of the disconnected ranges that make up this range set. The returned set may be empty. The iterators returned by its Iterable.iterator() method return the ranges in decreasing order of lower bound (equivalently, of upper bound).

Since:

19.0

complement

RangeSet<C> complement()

Returns a view of the complement of this RangeSet.

The returned view supports the add(com.google.common.collect.Range<C>) operation if this RangeSet supports remove(com.google.common.collect.Range<C>), and vice versa.

subRangeSet

RangeSet<C> subRangeSet(Range<C> view)

Returns a view of the intersection of this RangeSet with the specified range.

The returned view supports all optional operations supported by this RangeSet, with the caveat that an IllegalArgumentException is thrown on an attempt to add any range not enclosed by view.

add

void add(Range<C> range)

Adds the specified range to this RangeSet (optional operation). That is, for equal range sets a and b, the result of a.add(range) is that a will be the minimal range set for which both a.enclosesAll(b) and a.encloses(range).

Note that range will be coalesced with any ranges in the range set that are connected with it. Moreover, if range is empty, this is a no-op.

Throws:

UnsupportedOperationException - if this range set does not support the add operation

remove

void remove(Range<C> range)

Removes the specified range from this RangeSet (optional operation). After this operation, if range.contains(c), this.contains(c) will return false.

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

Throws:

UnsupportedOperationException - if this range set does not support the remove operation

clear

void clear()

Removes all ranges from this RangeSet (optional operation). After this operation, this.contains(c) will return false for all c.

This is equivalent to remove(Range.all()).

Throws:

UnsupportedOperationException - if this range set does not support the clear operation

addAll

void addAll(RangeSet<C> other)

Adds all of the ranges from the specified range set to this range set (optional operation). After this operation, this range set is the minimal range set that encloses both the original range set and other.

This is equivalent to calling add(com.google.common.collect.Range<C>) on each of the ranges in other in turn.

Throws:

UnsupportedOperationException - if this range set does not support the addAll operation

addAll

default void addAll(Iterable<Range<C>> ranges)

Adds all of the specified ranges to this range set (optional operation). After this operation, this range set is the minimal range set that encloses both the original range set and each range in other.

This is equivalent to calling add(com.google.common.collect.Range<C>) on each of the ranges in other in turn.

Throws:

UnsupportedOperationException - if this range set does not support the addAll operation

Since:

21.0

removeAll

void removeAll(RangeSet<C> other)

Removes all of the ranges from the specified range set from this range set (optional operation). After this operation, if other.contains(c), this.contains(c) will return false.

This is equivalent to calling remove(com.google.common.collect.Range<C>) on each of the ranges in other in turn.

Throws:

UnsupportedOperationException - if this range set does not support the removeAll operation

removeAll

default void removeAll(Iterable<Range<C>> ranges)

Removes all of the specified ranges from this range set (optional operation).

This is equivalent to calling remove(com.google.common.collect.Range<C>) on each of the ranges in other in turn.

Throws:

UnsupportedOperationException - if this range set does not support the removeAll operation

Since:

21.0

equals

boolean equals(@Nullable Object obj)

Returns true if obj is another RangeSet that contains the same ranges according to Range.equals(Object).

Overrides:

equals in class Object

hashCode

int hashCode()

Returns asRanges().hashCode().

Overrides:

hashCode in class Object

toString

String toString()

Returns a readable string representation of this range set. For example, if this RangeSet consisted of Range.closed(1, 3) and Range.greaterThan(4), this might return " [1..3](4..+∞)"}.

Overrides:

toString in class Object