org.geotools.util

Class RangeSet<T extends Comparable<? super T>>

Object

AbstractCollection<E>

AbstractSet<Range<T>>

RangeSet<T>

Type Parameters:

T - The type of range elements.

All Implemented Interfaces:

Serializable, Cloneable, Iterable<Range<T>>, Collection<Range<T>>, Set<Range<T>>, SortedSet<Range<T>>

public class RangeSet<T extends Comparable<? super T>>
extends AbstractSet<Range<T>>
implements SortedSet<Range<T>>, Cloneable, Serializable

An ordered set of ranges. RangeSet objects store an arbitrary number of ranges in any Java's primitives (int, float, etc.) or any comparable objects. Ranges may be added in any order. When a range is added, RangeSet first looks for an existing range overlapping the specified range. If an overlapping range is found, ranges are merged as of Range.union(org.geotools.util.Range<?>). Consequently, ranges returned by iterator() may not be the same than added ranges.

All entries in this set can be seen as Range objects. This class is not thread-safe.

Since:

2.0

Author:

Martin Desruisseaux (IRD), Andrea Aime

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RangeSet(Class<T> type) Constructs an empty set of range.

Method Summary

Modifier and Type	Method and Description
boolean	add(byte lower, byte upper) Add a range of values to this set.
<N> boolean	add(Comparable<? super N> min, Comparable<? super N> max) Adds a range of values to this set.
boolean	add(double lower, double upper) Add a range of values to this set.
boolean	add(float lower, float upper) Add a range of values to this set.
boolean	add(int lower, int upper) Add a range of values to this set.
boolean	add(long lower, long upper) Add a range of values to this set.
boolean	add(Range<T> range) Add a range to this set.
boolean	add(short lower, short upper) Add a range of values to this set.
void	clear() Remove all elements from this set of ranges.
RangeSet	clone() Returns a clone of this range set.
Comparator<Range<T>>	comparator() Returns the comparator associated with this sorted set.
boolean	contains(Object object) Returns true if this set contains the specified element.
boolean	equals(Object object) Compares the specified object with this set of ranges for equality.
Range<T>	first() Returns the first (lowest) range currently in this sorted set.
double	getMaxValueAsDouble(int index) Returns a range's maximum value as a double.
double	getMinValueAsDouble(int index) Returns a range's minimum value as a double.
int	hashCode() Returns a hash value for this set of ranges.
SortedSet<Range<T>>	headSet(Range<T> upper) Returns a view of the portion of this sorted set whose elements are strictly less than upper.
int	indexOfRange(Comparable value) If the specified value is inside a range, returns the index of this range.
Iterator<Range<T>>	iterator() Returns an iterator over the elements in this set of ranges.
Range<T>	last() Returns the last (highest) range currently in this sorted set.
boolean	remove(byte lower, byte upper) Remove a range of values from this set.
<N> boolean	remove(Comparable<? super N> min, Comparable<? super N> max) Remove a range of values from this set.
boolean	remove(double lower, double upper) Remove a range of values from this set.
boolean	remove(float lower, float upper) Remove a range of values from this set.
boolean	remove(int lower, int upper) Remove a range of values from this set.
boolean	remove(long lower, long upper) Remove a range of values from this set.
boolean	remove(short lower, short upper) Remove a range of values from this set.
int	size() Returns the number of ranges in this set.
SortedSet<Range<T>>	subSet(Range<T> lower, Range<T> upper) Returns a view of the portion of this sorted set whose elements range from lower, inclusive, to upper, exclusive.
SortedSet<Range<T>>	tailSet(Range<T> lower) Returns a view of the portion of this sorted set whose elements are greater than or equal to lower.
String	toString() Returns a string representation of this set of ranges.

Methods inherited from class AbstractSet

removeAll

Methods inherited from class AbstractCollection

addAll, containsAll, isEmpty, remove, retainAll, toArray, toArray

Methods inherited from class Object

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

Methods inherited from interface SortedSet

spliterator

Methods inherited from interface Set

addAll, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Methods inherited from interface Collection

parallelStream, removeIf, stream

Methods inherited from interface Iterable

forEach

Constructor Detail

RangeSet

public RangeSet(Class<T> type)
         throws IllegalArgumentException

Constructs an empty set of range.

Parameters:

type - The class of the range elements. It must be a primitive type or a class implementing Comparable.

Throws:

IllegalArgumentException - if type is not a primitive type or a class implementing Comparable.

Method Detail

comparator

public Comparator<Range<T>> comparator()

Returns the comparator associated with this sorted set.

Specified by:

comparator in interface SortedSet<Range<T extends Comparable<? super T>>>

clear

public void clear()

Remove all elements from this set of ranges.

Specified by:

clear in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

clear in interface Set<Range<T extends Comparable<? super T>>>

Overrides:

clear in class AbstractCollection<Range<T extends Comparable<? super T>>>

size

public int size()

Returns the number of ranges in this set.

Specified by:

size in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

size in interface Set<Range<T extends Comparable<? super T>>>

Specified by:

size in class AbstractCollection<Range<T extends Comparable<? super T>>>

add

public boolean add(Range<T> range)

Add a range to this set. Range may be added in any order. If the specified range overlap an existing range, the two range will be merged as of Range.union(org.geotools.util.Range<?>).

Note: current version do not support open interval (i.e. Range.is[Min/Max]Included() must return true).

Specified by:

add in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

add in interface Set<Range<T extends Comparable<? super T>>>

Overrides:

add in class AbstractCollection<Range<T extends Comparable<? super T>>>

Parameters:

range - The range to add.

Returns:

true if this set changed as a result of the call.

add

public <N> boolean add(Comparable<? super N> min,
                       Comparable<? super N> max)
                throws IllegalArgumentException

Adds a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

min - The lower value, inclusive.

max - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

add

public boolean add(byte lower,
                   byte upper)
            throws IllegalArgumentException

Add a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

lower - The lower value, inclusive.

upper - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

add

public boolean add(short lower,
                   short upper)
            throws IllegalArgumentException

Add a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

lower - The lower value, inclusive.

upper - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

add

public boolean add(int lower,
                   int upper)
            throws IllegalArgumentException

Add a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

lower - The lower value, inclusive.

upper - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

add

public boolean add(long lower,
                   long upper)
            throws IllegalArgumentException

Add a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

lower - The lower value, inclusive.

upper - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

add

public boolean add(float lower,
                   float upper)
            throws IllegalArgumentException

Add a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

lower - The lower value, inclusive.

upper - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

add

public boolean add(double lower,
                   double upper)
            throws IllegalArgumentException

Add a range of values to this set. Range may be added in any order. If the specified range overlap an existing range, the two ranges will be merged.

Parameters:

lower - The lower value, inclusive.

upper - The upper value, inclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public <N> boolean remove(Comparable<? super N> min,
                          Comparable<? super N> max)
                   throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

min - The lower value to remove, exclusive.

max - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public boolean remove(byte lower,
                      byte upper)
               throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

lower - The lower value to remove, exclusive.

upper - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public boolean remove(short lower,
                      short upper)
               throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

lower - The lower value to remove, exclusive.

upper - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public boolean remove(int lower,
                      int upper)
               throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

lower - The lower value to remove, exclusive.

upper - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public boolean remove(long lower,
                      long upper)
               throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

lower - The lower value to remove, exclusive.

upper - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public boolean remove(float lower,
                      float upper)
               throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

lower - The lower value to remove, exclusive.

upper - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

remove

public boolean remove(double lower,
                      double upper)
               throws IllegalArgumentException

Remove a range of values from this set. Range may be removed in any order.

Parameters:

lower - The lower value to remove, exclusive.

upper - The upper value to remove, exclusive.

Returns:

true if this set changed as a result of the call.

Throws:

IllegalArgumentException - if lower is greater than upper.

getMinValueAsDouble

public final double getMinValueAsDouble(int index)
                                 throws IndexOutOfBoundsException,
                                        ClassCastException

Returns a range's minimum value as a double. The index can be any value from 0 inclusive to the set's size exclusive. The returned values always increase with index.

Parameters:

index - The range index, from 0 inclusive to size exclusive.

Returns:

The minimum value for the range at the specified index.

Throws:

IndexOutOfBoundsException - if index is out of bounds.

ClassCastException - if range elements are not convertible to numbers.

getMaxValueAsDouble

public final double getMaxValueAsDouble(int index)
                                 throws IndexOutOfBoundsException,
                                        ClassCastException

Returns a range's maximum value as a double. The index can be any value from 0 inclusive to the set's size exclusive. The returned values always increase with index.

Parameters:

index - The range index, from 0 inclusive to size exclusive.

Returns:

The maximum value for the range at the specified index.

Throws:

IndexOutOfBoundsException - if index is out of bounds.

ClassCastException - if range elements are not convertible to numbers.

indexOfRange

public int indexOfRange(Comparable value)

If the specified value is inside a range, returns the index of this range. Otherwise, returns -1.

Parameters:

value - The value to search.

Returns:

The index of the range which contains this value, or -1 if there is no such range.

contains

public boolean contains(Object object)

Returns true if this set contains the specified element.

Specified by:

contains in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

contains in interface Set<Range<T extends Comparable<? super T>>>

Overrides:

contains in class AbstractCollection<Range<T extends Comparable<? super T>>>

Parameters:

object - The object to compare to this set.

Returns:

true if the given object is equals to this set.

first

public Range<T> first()
               throws NoSuchElementException

Returns the first (lowest) range currently in this sorted set.

Specified by:

first in interface SortedSet<Range<T extends Comparable<? super T>>>

Throws:

NoSuchElementException - if the set is empty.

last

public Range<T> last()
              throws NoSuchElementException

Returns the last (highest) range currently in this sorted set.

Specified by:

last in interface SortedSet<Range<T extends Comparable<? super T>>>

Throws:

NoSuchElementException - if the set is empty.

subSet

public SortedSet<Range<T>> subSet(Range<T> lower,
                                  Range<T> upper)

Returns a view of the portion of this sorted set whose elements range from lower, inclusive, to upper, exclusive.

Specified by:

subSet in interface SortedSet<Range<T extends Comparable<? super T>>>

Parameters:

lower - Low endpoint (inclusive) of the sub set.

upper - High endpoint (exclusive) of the sub set.

Returns:

A view of the specified range within this sorted set.

headSet

public SortedSet<Range<T>> headSet(Range<T> upper)

Returns a view of the portion of this sorted set whose elements are strictly less than upper.

Specified by:

headSet in interface SortedSet<Range<T extends Comparable<? super T>>>

Parameters:

upper - High endpoint (exclusive) of the headSet.

Returns:

A view of the specified initial range of this sorted set.

tailSet

public SortedSet<Range<T>> tailSet(Range<T> lower)

Returns a view of the portion of this sorted set whose elements are greater than or equal to lower.

Specified by:

tailSet in interface SortedSet<Range<T extends Comparable<? super T>>>

Parameters:

lower - Low endpoint (inclusive) of the tailSet.

Returns:

A view of the specified final range of this sorted set.

iterator

public Iterator<Range<T>> iterator()

Returns an iterator over the elements in this set of ranges. All elements are Range objects.

Specified by:

iterator in interface Iterable<Range<T extends Comparable<? super T>>>

Specified by:

iterator in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

iterator in interface Set<Range<T extends Comparable<? super T>>>

Specified by:

iterator in class AbstractCollection<Range<T extends Comparable<? super T>>>

hashCode

public int hashCode()

Returns a hash value for this set of ranges. This value need not remain consistent between different implementations of the same class.

Specified by:

hashCode in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

hashCode in interface Set<Range<T extends Comparable<? super T>>>

Overrides:

hashCode in class AbstractSet<Range<T extends Comparable<? super T>>>

equals

public boolean equals(Object object)

Compares the specified object with this set of ranges for equality.

Specified by:

equals in interface Collection<Range<T extends Comparable<? super T>>>

Specified by:

equals in interface Set<Range<T extends Comparable<? super T>>>

Overrides:

equals in class AbstractSet<Range<T extends Comparable<? super T>>>

Parameters:

object - The object to compare with this range.

Returns:

true if the given object is equals to this range.

clone

public RangeSet clone()

Returns a clone of this range set.

Overrides:

clone in class Object

Returns:

A clone of this range set.

See Also:

Object.clone()

toString

public String toString()

Returns a string representation of this set of ranges. The returned string is implementation dependent. It is usually provided for debugging purposes.

Overrides:

toString in class AbstractCollection<Range<T extends Comparable<? super T>>>