it.unimi.dsi.fastutil.chars

Class CharRBTreeSet

java.lang.Object

java.util.AbstractCollection<Character>

it.unimi.dsi.fastutil.chars.AbstractCharCollection

it.unimi.dsi.fastutil.chars.AbstractCharSet

it.unimi.dsi.fastutil.chars.AbstractCharSortedSet

it.unimi.dsi.fastutil.chars.CharRBTreeSet

All Implemented Interfaces:

CharCollection, CharIterable, CharSet, CharSortedSet, Serializable, Cloneable, Iterable<Character>, Collection<Character>, Set<Character>, SortedSet<Character>

public class CharRBTreeSet
extends AbstractCharSortedSet
implements Serializable, Cloneable, CharSortedSet

A type-specific red-black tree set with a fast, small-footprint implementation.

The iterators provided by this class are type-specific bidirectional iterators. Moreover, the iterator returned by iterator() can be safely cast to a type-specific list iterator.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected CharComparator	actualComparator This set's actual comparator; it may differ from storedComparator because it is always a type-specific comparator, so it could be derived from the former by wrapping.
protected int	count Number of elements in this set.
protected it.unimi.dsi.fastutil.chars.CharRBTreeSet.Entry	firstEntry The entry of the first element of this set.
protected it.unimi.dsi.fastutil.chars.CharRBTreeSet.Entry	lastEntry The entry of the last element of this set.
static long	serialVersionUID
protected Comparator<? super Character>	storedComparator This set's comparator, as provided in the constructor.
protected it.unimi.dsi.fastutil.chars.CharRBTreeSet.Entry	tree A reference to the root entry.

Constructor Summary

Constructors

Constructor and Description
CharRBTreeSet() Creates a new empty tree set.
CharRBTreeSet(char[] a) Creates a new tree set copying the elements of an array.
CharRBTreeSet(char[] a, Comparator<? super Character> c) Creates a new tree set copying the elements of an array using a given Comparator.
CharRBTreeSet(char[] a, int offset, int length) Creates a new tree set and fills it with the elements of a given array.
CharRBTreeSet(char[] a, int offset, int length, Comparator<? super Character> c) Creates a new tree set and fills it with the elements of a given array using a given Comparator.
CharRBTreeSet(CharCollection c) Creates a new tree set copying a given type-specific collection.
CharRBTreeSet(CharIterator i) Creates a new tree set using elements provided by a type-specific iterator.
CharRBTreeSet(CharSortedSet s) Creates a new tree set copying a given type-specific sorted set (and its Comparator).
CharRBTreeSet(Collection<? extends Character> c) Creates a new tree set copying a given collection.
CharRBTreeSet(Comparator<? super Character> c) Creates a new empty tree set with the given comparator.
CharRBTreeSet(Iterator<? extends Character> i) Creates a new tree set using elements provided by an iterator.
CharRBTreeSet(SortedSet<Character> s) Creates a new tree set copying a given sorted set (and its Comparator).

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(char k)
void	clear()
Object	clone() Returns a deep copy of this tree set.
CharComparator	comparator() Returns the comparator associated with this sorted set, or null if it uses its elements' natural ordering.
boolean	contains(char k)
char	firstChar()
CharSortedSet	headSet(char to)
boolean	isEmpty()
CharBidirectionalIterator	iterator() Returns a type-specific iterator on the elements of this collection.
CharBidirectionalIterator	iterator(char from) Returns a type-specific BidirectionalIterator on the elements in this set, starting from a given element of the domain (optional operation).
char	lastChar()
boolean	remove(char k) Removes an element from this set.
int	size()
CharSortedSet	subSet(char from, char to)
CharSortedSet	tailSet(char from)

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharSortedSet

charIterator, first, headSet, last, subSet, tailSet

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharSet

equals, hashCode, rem, remove

Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractCharCollection

add, addAll, addAll, contains, containsAll, containsAll, rem, removeAll, removeAll, retainAll, retainAll, toArray, toArray, toArray, toCharArray, toCharArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharSortedSet

charIterator, headSet, subSet, tailSet

Methods inherited from interface it.unimi.dsi.fastutil.chars.CharCollection

addAll, containsAll, rem, removeAll, retainAll, toArray, toArray, toCharArray, toCharArray

Methods inherited from interface java.util.SortedSet

first, last

Methods inherited from interface java.util.Set

add, addAll, contains, containsAll, equals, hashCode, remove, removeAll, retainAll, toArray, toArray

Field Detail

tree

protected transient it.unimi.dsi.fastutil.chars.CharRBTreeSet.Entry tree

A reference to the root entry.

count

protected int count

Number of elements in this set.

firstEntry

protected transient it.unimi.dsi.fastutil.chars.CharRBTreeSet.Entry firstEntry

The entry of the first element of this set.

lastEntry

protected transient it.unimi.dsi.fastutil.chars.CharRBTreeSet.Entry lastEntry

The entry of the last element of this set.

storedComparator

protected Comparator<? super Character> storedComparator

This set's comparator, as provided in the constructor.

actualComparator

protected transient CharComparator actualComparator

This set's actual comparator; it may differ from storedComparator because it is always a type-specific comparator, so it could be derived from the former by wrapping.

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

CharRBTreeSet

public CharRBTreeSet()

Creates a new empty tree set.

CharRBTreeSet

public CharRBTreeSet(Comparator<? super Character> c)

Creates a new empty tree set with the given comparator.

Parameters:

c - a Comparator (even better, a type-specific comparator).

CharRBTreeSet

public CharRBTreeSet(Collection<? extends Character> c)

Creates a new tree set copying a given collection.

Parameters:

c - a collection to be copied into the new tree set.

CharRBTreeSet

public CharRBTreeSet(SortedSet<Character> s)

Creates a new tree set copying a given sorted set (and its Comparator).

Parameters:

s - a SortedSet to be copied into the new tree set.

CharRBTreeSet

public CharRBTreeSet(CharCollection c)

Creates a new tree set copying a given type-specific collection.

Parameters:

c - a type-specific collection to be copied into the new tree set.

CharRBTreeSet

public CharRBTreeSet(CharSortedSet s)

Creates a new tree set copying a given type-specific sorted set (and its Comparator).

Parameters:

s - a type-specific sorted set to be copied into the new tree set.

CharRBTreeSet

public CharRBTreeSet(CharIterator i)

Creates a new tree set using elements provided by a type-specific iterator.

Parameters:

i - a type-specific iterator whose elements will fill the set.

CharRBTreeSet

public CharRBTreeSet(Iterator<? extends Character> i)

Creates a new tree set using elements provided by an iterator.

Parameters:

i - an iterator whose elements will fill the set.

CharRBTreeSet

public CharRBTreeSet(char[] a,
             int offset,
             int length,
             Comparator<? super Character> c)

Creates a new tree set and fills it with the elements of a given array using a given Comparator.

Parameters:

a - an array whose elements will be used to fill the set.

offset - the first element to use.

length - the number of elements to use.

c - a Comparator (even better, a type-specific comparator).

CharRBTreeSet

public CharRBTreeSet(char[] a,
             int offset,
             int length)

Creates a new tree set and fills it with the elements of a given array.

Parameters:

a - an array whose elements will be used to fill the set.

offset - the first element to use.

length - the number of elements to use.

CharRBTreeSet

public CharRBTreeSet(char[] a)

Creates a new tree set copying the elements of an array.

Parameters:

a - an array to be copied into the new tree set.

CharRBTreeSet

public CharRBTreeSet(char[] a,
             Comparator<? super Character> c)

Creates a new tree set copying the elements of an array using a given Comparator.

Parameters:

a - an array to be copied into the new tree set.

c - a Comparator (even better, a type-specific comparator).

Method Detail

add

public boolean add(char k)

Specified by:

add in interface CharCollection

Overrides:

add in class AbstractCharCollection

See Also:

Collection.add(Object)

remove

public boolean remove(char k)

Description copied from interface: CharSet

Removes an element from this set.

Note that the corresponding method of the type-specific collection is rem(). This unfortunate situation is caused by the clash with the similarly named index-based method in the List interface.

Specified by:

remove in interface CharSet

Overrides:

remove in class AbstractCharSet

See Also:

Collection.remove(Object)

contains

public boolean contains(char k)

Specified by:

contains in interface CharCollection

Overrides:

contains in class AbstractCharCollection

See Also:

Collection.contains(Object)

clear

public void clear()

Specified by:

clear in interface Collection<Character>

Specified by:

clear in interface Set<Character>

Overrides:

clear in class AbstractCollection<Character>

size

public int size()

Specified by:

size in interface Collection<Character>

Specified by:

size in interface Set<Character>

Specified by:

size in class AbstractCollection<Character>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<Character>

Specified by:

isEmpty in interface Set<Character>

Overrides:

isEmpty in class AbstractCharCollection

firstChar

public char firstChar()

Specified by:

firstChar in interface CharSortedSet

See Also:

SortedSet.first()

lastChar

public char lastChar()

Specified by:

lastChar in interface CharSortedSet

See Also:

SortedSet.last()

iterator

public CharBidirectionalIterator iterator()

Description copied from interface: CharCollection

Returns a type-specific iterator on the elements of this collection.

Note that this specification strengthens the one given in Iterable.iterator(), which was already strengthened in the corresponding type-specific class, but was weakened by the fact that this interface extends Collection.

Specified by:

iterator in interface CharCollection

Specified by:

iterator in interface CharIterable

Specified by:

iterator in interface CharSet

Specified by:

iterator in interface CharSortedSet

Specified by:

iterator in interface Iterable<Character>

Specified by:

iterator in interface Collection<Character>

Specified by:

iterator in interface Set<Character>

Specified by:

iterator in class AbstractCharSortedSet

Returns:

a type-specific iterator on the elements of this collection.

iterator

public CharBidirectionalIterator iterator(char from)

Description copied from interface: CharSortedSet

Returns a type-specific BidirectionalIterator on the elements in this set, starting from a given element of the domain (optional operation).

This method returns a type-specific bidirectional iterator with given starting point. The starting point is any element comparable to the elements of this set (even if it does not actually belong to the set). The next element of the returned iterator is the least element of the set that is greater than the starting point (if there are no elements greater than the starting point, hasNext() will return false). The previous element of the returned iterator is the greatest element of the set that is smaller than or equal to the starting point (if there are no elements smaller than or equal to the starting point, hasPrevious() will return false).

Note that passing the last element of the set as starting point and calling previous() you can traverse the entire set in reverse order.

Specified by:

iterator in interface CharSortedSet

Parameters:

from - an element to start from.

Returns:

a bidirectional iterator on the element in this set, starting at the given element.

comparator

public CharComparator comparator()

Description copied from interface: CharSortedSet

Returns the comparator associated with this sorted set, or null if it uses its elements' natural ordering.

Note that this specification strengthens the one given in SortedSet.comparator().

Specified by:

comparator in interface CharSortedSet

Specified by:

comparator in interface SortedSet<Character>

See Also:

SortedSet.comparator()

headSet

public CharSortedSet headSet(char to)

Specified by:

headSet in interface CharSortedSet

See Also:

SortedSet.headSet(Object)

tailSet

public CharSortedSet tailSet(char from)

Specified by:

tailSet in interface CharSortedSet

See Also:

SortedSet.tailSet(Object)

subSet

public CharSortedSet subSet(char from,
                   char to)

Specified by:

subSet in interface CharSortedSet

See Also:

SortedSet.subSet(Object,Object)

clone

public Object clone()

Returns a deep copy of this tree set.

This method performs a deep copy of this tree set; the data stored in the set, however, is not cloned. Note that this makes a difference only for object keys.

Overrides:

clone in class Object

Returns:

a deep copy of this tree set.