Package com.google.common.collect

Class ImmutableSortedSet<E>

java.lang.Object

java.util.AbstractCollection<E>

com.google.common.collect.ImmutableCollection<E>

com.google.common.collect.ImmutableSet<E>

com.google.common.collect.ImmutableSortedSet<E>

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.NavigableSet<E>, java.util.Set<E>, java.util.SortedSet<E>

Direct Known Subclasses:

ContiguousSet

@GwtCompatible(serializable=true,
               emulated=true)
public abstract class ImmutableSortedSet<E>
extends ImmutableSet<E>
implements java.util.NavigableSet<E>

A NavigableSet whose contents will never change, with many other important properties detailed at ImmutableCollection.

Warning: as with any sorted collection, you are strongly advised not to use a Comparator or Comparable type whose comparison behavior is inconsistent with equals. That is, a.compareTo(b) or comparator.compare(a, b) should equal zero if and only if a.equals(b). If this advice is not followed, the resulting collection will not correctly obey its specification.

See the Guava User Guide article on immutable collections.

Since:

2.0 (implements NavigableSet since 12.0)

Author:

Jared Levy, Louis Wasserman

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ImmutableSortedSet.Builder<E>	A builder for creating immutable sorted set instances, especially public static final sets ("constant sets"), with a given comparator.

Method Summary

Modifier and Type	Method	Description
static <E> ImmutableSortedSet.Builder<E>	builder()	Deprecated. Use naturalOrder(), which offers better type-safety.
static <E> ImmutableSortedSet.Builder<E>	builderWithExpectedSize(int expectedSize)	Deprecated. Not supported by ImmutableSortedSet.
E	ceiling(E e)
java.util.Comparator<? super E>	comparator()	Returns the comparator that orders the elements, which is Ordering.natural() when the natural ordering of the elements is used.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	copyOf(E[] elements)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E> ImmutableSortedSet<E>	copyOf(java.lang.Iterable<? extends E> elements)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E> ImmutableSortedSet<E>	copyOf(java.util.Collection<? extends E> elements)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E> ImmutableSortedSet<E>	copyOf(java.util.Comparator<? super E> comparator, java.lang.Iterable<? extends E> elements)	Returns an immutable sorted set containing the given elements sorted by the given Comparator.
static <E> ImmutableSortedSet<E>	copyOf(java.util.Comparator<? super E> comparator, java.util.Collection<? extends E> elements)	Returns an immutable sorted set containing the given elements sorted by the given Comparator.
static <E> ImmutableSortedSet<E>	copyOf(java.util.Comparator<? super E> comparator, java.util.Iterator<? extends E> elements)	Returns an immutable sorted set containing the given elements sorted by the given Comparator.
static <E> ImmutableSortedSet<E>	copyOf(java.util.Iterator<? extends E> elements)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <Z> ImmutableSortedSet<Z>	copyOf(Z[] elements)	Deprecated. Pass parameters of type Comparable to use copyOf(Comparable[]).
static <E> ImmutableSortedSet<E>	copyOfSorted(java.util.SortedSet<E> sortedSet)	Returns an immutable sorted set containing the elements of a sorted set, sorted by the same Comparator.
abstract UnmodifiableIterator<E>	descendingIterator()
ImmutableSortedSet<E>	descendingSet()
E	first()
E	floor(E e)
ImmutableSortedSet<E>	headSet(E toElement)
ImmutableSortedSet<E>	headSet(E toElement, boolean inclusive)
E	higher(E e)
abstract UnmodifiableIterator<E>	iterator()	Returns an unmodifiable iterator across the elements in this collection.
E	last()
E	lower(E e)
static <E extends java.lang.Comparable<?>> ImmutableSortedSet.Builder<E>	naturalOrder()	Returns a builder that creates immutable sorted sets whose elements are ordered by their natural ordering.
static <E> ImmutableSortedSet<E>	of()	Returns the empty immutable sorted set.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	of(E element)	Returns an immutable sorted set containing a single element.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	of(E e1, E e2)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	of(E e1, E e2, E e3)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	of(E e1, E e2, E e3, E e4)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	of(E e1, E e2, E e3, E e4, E e5)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E>	of(E e1, E e2, E e3, E e4, E e5, E e6, E... remaining)	Returns an immutable sorted set containing the given elements sorted by their natural ordering.
static <E> ImmutableSortedSet.Builder<E>	orderedBy(java.util.Comparator<E> comparator)	Returns a builder that creates immutable sorted sets with an explicit comparator.
E	pollFirst()	Deprecated. Unsupported operation.
E	pollLast()	Deprecated. Unsupported operation.
static <E extends java.lang.Comparable<?>> ImmutableSortedSet.Builder<E>	reverseOrder()	Returns a builder that creates immutable sorted sets whose elements are ordered by the reverse of their natural ordering.
ImmutableSortedSet<E>	subSet(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive)
ImmutableSortedSet<E>	subSet(E fromElement, E toElement)
ImmutableSortedSet<E>	tailSet(E fromElement)
ImmutableSortedSet<E>	tailSet(E fromElement, boolean inclusive)

Methods inherited from class com.google.common.collect.ImmutableSet

asList, equals, hashCode

Methods inherited from class com.google.common.collect.ImmutableCollection

add, addAll, clear, contains, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, size, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface java.util.Set

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, size, toArray, toArray

Methods inherited from interface java.util.SortedSet

spliterator

Method Detail

of

public static <E> ImmutableSortedSet<E> of()

Returns the empty immutable sorted set.

Performance note: the instance returned is a singleton.

of

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> of(E element)

Returns an immutable sorted set containing a single element.

of

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> of(E e1,
                                                                                   E e2)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to Comparable.compareTo(T), only the first one specified is included.

Throws:

java.lang.NullPointerException - if any element is null

of

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> of(E e1,
                                                                                   E e2,
                                                                                   E e3)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to Comparable.compareTo(T), only the first one specified is included.

Throws:

java.lang.NullPointerException - if any element is null

of

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> of(E e1,
                                                                                   E e2,
                                                                                   E e3,
                                                                                   E e4)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to Comparable.compareTo(T), only the first one specified is included.

Throws:

java.lang.NullPointerException - if any element is null

of

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> of(E e1,
                                                                                   E e2,
                                                                                   E e3,
                                                                                   E e4,
                                                                                   E e5)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to Comparable.compareTo(T), only the first one specified is included.

Throws:

java.lang.NullPointerException - if any element is null

of

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> of(E e1,
                                                                                   E e2,
                                                                                   E e3,
                                                                                   E e4,
                                                                                   E e5,
                                                                                   E e6,
                                                                                   E... remaining)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to Comparable.compareTo(T), only the first one specified is included.

Throws:

java.lang.NullPointerException - if any element is null

Since:

3.0 (source-compatible since 2.0)

copyOf

public static <E extends java.lang.Comparable<? super E>> ImmutableSortedSet<E> copyOf(E[] elements)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to Comparable.compareTo(T), only the first one specified is included.

Throws:

java.lang.NullPointerException - if any of elements is null

Since:

3.0

copyOf

public static <E> ImmutableSortedSet<E> copyOf(java.lang.Iterable<? extends E> elements)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to compareTo(), only the first one specified is included. To create a copy of a SortedSet that preserves the comparator, call copyOfSorted(java.util.SortedSet<E>) instead. This method iterates over elements at most once.

Note that if s is a Set<String>, then ImmutableSortedSet.copyOf(s) returns an ImmutableSortedSet<String> containing each of the strings in s, while ImmutableSortedSet.of(s) returns an ImmutableSortedSet<Set<String>> containing one element (the given set itself).

Despite the method name, this method attempts to avoid actually copying the data when it is safe to do so. The exact circumstances under which a copy will or will not be performed are undocumented and subject to change.

This method is not type-safe, as it may be called on elements that are not mutually comparable.

Throws:

java.lang.ClassCastException - if the elements are not mutually comparable

java.lang.NullPointerException - if any of elements is null

copyOf

public static <E> ImmutableSortedSet<E> copyOf(java.util.Collection<? extends E> elements)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to compareTo(), only the first one specified is included. To create a copy of a SortedSet that preserves the comparator, call copyOfSorted(java.util.SortedSet<E>) instead. This method iterates over elements at most once.

Note that if s is a Set<String>, then ImmutableSortedSet.copyOf(s) returns an ImmutableSortedSet<String> containing each of the strings in s, while ImmutableSortedSet.of(s) returns an ImmutableSortedSet<Set<String>> containing one element (the given set itself).

Note: Despite what the method name suggests, if elements is an ImmutableSortedSet, it may be returned instead of a copy.

This method is not type-safe, as it may be called on elements that are not mutually comparable.

This method is safe to use even when elements is a synchronized or concurrent collection that is currently being modified by another thread.

Throws:

java.lang.ClassCastException - if the elements are not mutually comparable

java.lang.NullPointerException - if any of elements is null

Since:

7.0 (source-compatible since 2.0)

copyOf

public static <E> ImmutableSortedSet<E> copyOf(java.util.Iterator<? extends E> elements)

Returns an immutable sorted set containing the given elements sorted by their natural ordering. When multiple elements are equivalent according to compareTo(), only the first one specified is included.

This method is not type-safe, as it may be called on elements that are not mutually comparable.

Throws:

java.lang.ClassCastException - if the elements are not mutually comparable

java.lang.NullPointerException - if any of elements is null

copyOf

public static <E> ImmutableSortedSet<E> copyOf(java.util.Comparator<? super E> comparator,
                                               java.util.Iterator<? extends E> elements)

Returns an immutable sorted set containing the given elements sorted by the given Comparator. When multiple elements are equivalent according to compareTo(), only the first one specified is included.

Throws:

java.lang.NullPointerException - if comparator or any of elements is null

copyOf

public static <E> ImmutableSortedSet<E> copyOf(java.util.Comparator<? super E> comparator,
                                               java.lang.Iterable<? extends E> elements)

Returns an immutable sorted set containing the given elements sorted by the given Comparator. When multiple elements are equivalent according to compare(), only the first one specified is included. This method iterates over elements at most once.

Despite the method name, this method attempts to avoid actually copying the data when it is safe to do so. The exact circumstances under which a copy will or will not be performed are undocumented and subject to change.

Throws:

java.lang.NullPointerException - if comparator or any of elements is null

copyOf

public static <E> ImmutableSortedSet<E> copyOf(java.util.Comparator<? super E> comparator,
                                               java.util.Collection<? extends E> elements)

Returns an immutable sorted set containing the given elements sorted by the given Comparator. When multiple elements are equivalent according to compareTo(), only the first one specified is included.

Despite the method name, this method attempts to avoid actually copying the data when it is safe to do so. The exact circumstances under which a copy will or will not be performed are undocumented and subject to change.

This method is safe to use even when elements is a synchronized or concurrent collection that is currently being modified by another thread.

Throws:

java.lang.NullPointerException - if comparator or any of elements is null

Since:

7.0 (source-compatible since 2.0)

copyOfSorted

public static <E> ImmutableSortedSet<E> copyOfSorted(java.util.SortedSet<E> sortedSet)

Returns an immutable sorted set containing the elements of a sorted set, sorted by the same Comparator. That behavior differs from copyOf(Iterable), which always uses the natural ordering of the elements.

Despite the method name, this method attempts to avoid actually copying the data when it is safe to do so. The exact circumstances under which a copy will or will not be performed are undocumented and subject to change.

This method is safe to use even when sortedSet is a synchronized or concurrent collection that is currently being modified by another thread.

Throws:

java.lang.NullPointerException - if sortedSet or any of its elements is null

orderedBy

public static <E> ImmutableSortedSet.Builder<E> orderedBy(java.util.Comparator<E> comparator)

Returns a builder that creates immutable sorted sets with an explicit comparator. If the comparator has a more general type than the set being generated, such as creating a SortedSet<Integer> with a Comparator<Number>, use the ImmutableSortedSet.Builder constructor instead.

Throws:

java.lang.NullPointerException - if comparator is null

reverseOrder

public static <E extends java.lang.Comparable<?>> ImmutableSortedSet.Builder<E> reverseOrder()

Returns a builder that creates immutable sorted sets whose elements are ordered by the reverse of their natural ordering.

naturalOrder

public static <E extends java.lang.Comparable<?>> ImmutableSortedSet.Builder<E> naturalOrder()

Returns a builder that creates immutable sorted sets whose elements are ordered by their natural ordering. The sorted sets use Ordering.natural() as the comparator. This method provides more type-safety than builder(), as it can be called only for classes that implement Comparable.

comparator

public java.util.Comparator<? super E> comparator()

Returns the comparator that orders the elements, which is Ordering.natural() when the natural ordering of the elements is used. Note that its behavior is not consistent with SortedSet.comparator(), which returns null to indicate natural ordering.

Specified by:

comparator in interface java.util.SortedSet<E>

iterator

public abstract UnmodifiableIterator<E> iterator()

Description copied from class: ImmutableCollection

Returns an unmodifiable iterator across the elements in this collection.

Specified by:

iterator in interface java.util.Collection<E>

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.NavigableSet<E>

Specified by:

iterator in interface java.util.Set<E>

Specified by:

iterator in class ImmutableSet<E>

headSet

public ImmutableSortedSet<E> headSet(E toElement)

This method returns a serializable ImmutableSortedSet.

The SortedSet.headSet(E) documentation states that a subset of a subset throws an IllegalArgumentException if passed a toElement greater than an earlier toElement. However, this method doesn't throw an exception in that situation, but instead keeps the original toElement.

Specified by:

headSet in interface java.util.NavigableSet<E>

Specified by:

headSet in interface java.util.SortedSet<E>

headSet

public ImmutableSortedSet<E> headSet(E toElement,
                                     boolean inclusive)

Specified by:

headSet in interface java.util.NavigableSet<E>

Since:

12.0

subSet

public ImmutableSortedSet<E> subSet(E fromElement,
                                    E toElement)

This method returns a serializable ImmutableSortedSet.

The SortedSet.subSet(E, E) documentation states that a subset of a subset throws an IllegalArgumentException if passed a fromElement smaller than an earlier fromElement. However, this method doesn't throw an exception in that situation, but instead keeps the original fromElement. Similarly, this method keeps the original toElement, instead of throwing an exception, if passed a toElement greater than an earlier toElement.

Specified by:

subSet in interface java.util.NavigableSet<E>

Specified by:

subSet in interface java.util.SortedSet<E>

subSet

@GwtIncompatible
public ImmutableSortedSet<E> subSet(E fromElement,
                                    boolean fromInclusive,
                                    E toElement,
                                    boolean toInclusive)

Specified by:

subSet in interface java.util.NavigableSet<E>

Since:

12.0

tailSet

public ImmutableSortedSet<E> tailSet(E fromElement)

This method returns a serializable ImmutableSortedSet.

The SortedSet.tailSet(E) documentation states that a subset of a subset throws an IllegalArgumentException if passed a fromElement smaller than an earlier fromElement. However, this method doesn't throw an exception in that situation, but instead keeps the original fromElement.

Specified by:

tailSet in interface java.util.NavigableSet<E>

Specified by:

tailSet in interface java.util.SortedSet<E>

tailSet

public ImmutableSortedSet<E> tailSet(E fromElement,
                                     boolean inclusive)

Specified by:

tailSet in interface java.util.NavigableSet<E>

Since:

12.0

lower

@GwtIncompatible
@CheckForNull
public E lower(E e)

Specified by:

lower in interface java.util.NavigableSet<E>

Since:

12.0

floor

@CheckForNull
public E floor(E e)

Specified by:

floor in interface java.util.NavigableSet<E>

Since:

12.0

ceiling

@CheckForNull
public E ceiling(E e)

Specified by:

ceiling in interface java.util.NavigableSet<E>

Since:

12.0

higher

@GwtIncompatible
@CheckForNull
public E higher(E e)

Specified by:

higher in interface java.util.NavigableSet<E>

Since:

12.0

first

public E first()

Specified by:

first in interface java.util.SortedSet<E>

last

public E last()

Specified by:

last in interface java.util.SortedSet<E>

pollFirst

@CanIgnoreReturnValue
@Deprecated
@GwtIncompatible
@CheckForNull
public final E pollFirst()

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the set unmodified.

Specified by:

pollFirst in interface java.util.NavigableSet<E>

Throws:

java.lang.UnsupportedOperationException - always

Since:

12.0

pollLast

@CanIgnoreReturnValue
@Deprecated
@GwtIncompatible
@CheckForNull
public final E pollLast()

Deprecated.

Unsupported operation.

Guaranteed to throw an exception and leave the set unmodified.

Specified by:

pollLast in interface java.util.NavigableSet<E>

Throws:

java.lang.UnsupportedOperationException - always

Since:

12.0

descendingSet

@GwtIncompatible
public ImmutableSortedSet<E> descendingSet()

Specified by:

descendingSet in interface java.util.NavigableSet<E>

Since:

12.0

descendingIterator

@GwtIncompatible
public abstract UnmodifiableIterator<E> descendingIterator()

Specified by:

descendingIterator in interface java.util.NavigableSet<E>

Since:

12.0

builder

@Deprecated
public static <E> ImmutableSortedSet.Builder<E> builder()

Deprecated.

Use naturalOrder(), which offers better type-safety.

Not supported. Use naturalOrder(), which offers better type-safety, instead. This method exists only to hide ImmutableSet.builder() from consumers of ImmutableSortedSet.

Throws:

java.lang.UnsupportedOperationException - always

builderWithExpectedSize

@Deprecated
public static <E> ImmutableSortedSet.Builder<E> builderWithExpectedSize(int expectedSize)

Deprecated.

Not supported by ImmutableSortedSet.

Not supported. This method exists only to hide ImmutableSet.builderWithExpectedSize(int) from consumers of ImmutableSortedSet.

Throws:

java.lang.UnsupportedOperationException - always

of

@Deprecated
public static <E> ImmutableSortedSet<E> of(E element)

Deprecated.

Pass a parameter of type Comparable to use of(Comparable).

Not supported. You are attempting to create a set that may contain a non-Comparable element. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always

of

@Deprecated
public static <E> ImmutableSortedSet<E> of(E e1,
                                           E e2)

Deprecated.

Pass the parameters of type Comparable to use of(Comparable, Comparable).

Not supported. You are attempting to create a set that may contain a non-Comparable element. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always

of

@Deprecated
public static <E> ImmutableSortedSet<E> of(E e1,
                                           E e2,
                                           E e3)

Deprecated.

Pass the parameters of type Comparable to use of(Comparable, Comparable, Comparable).

Not supported. You are attempting to create a set that may contain a non-Comparable element. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always

of

@Deprecated
public static <E> ImmutableSortedSet<E> of(E e1,
                                           E e2,
                                           E e3,
                                           E e4)

Deprecated.

Pass the parameters of type Comparable to use of(Comparable, Comparable, Comparable, Comparable).

Not supported. You are attempting to create a set that may contain a non-Comparable element. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always

of

@Deprecated
public static <E> ImmutableSortedSet<E> of(E e1,
                                           E e2,
                                           E e3,
                                           E e4,
                                           E e5)

Deprecated.

Pass the parameters of type Comparable to use of( Comparable, Comparable, Comparable, Comparable, Comparable).

Not supported. You are attempting to create a set that may contain a non-Comparable element. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always

of

@Deprecated
public static <E> ImmutableSortedSet<E> of(E e1,
                                           E e2,
                                           E e3,
                                           E e4,
                                           E e5,
                                           E e6,
                                           E... remaining)

Deprecated.

Pass the parameters of type Comparable to use of(Comparable, Comparable, Comparable, Comparable, Comparable, Comparable, Comparable...).

Not supported. You are attempting to create a set that may contain a non-Comparable element. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always

copyOf

@Deprecated
public static <Z> ImmutableSortedSet<Z> copyOf(Z[] elements)

Deprecated.

Pass parameters of type Comparable to use copyOf(Comparable[]).

Not supported. You are attempting to create a set that may contain non-Comparable elements. Proper calls will resolve to the version in ImmutableSortedSet, not this dummy version.

Throws:

java.lang.UnsupportedOperationException - always