net.sf.saxon.expr.sort
Class IntEmptySet

java.lang.Object
  net.sf.saxon.expr.sort.IntEmptySet

All Implemented Interfaces:

IntSet

public class IntEmptySet
extends Object
implements IntSet

An immutable integer set containing no integers

Method Summary

boolean	add(int value) Add an integer to the set
void	clear() Clear the contents of the IntSet (making it an empty set)
boolean	contains(int value) Determine whether a particular integer is present in the set
boolean	containsAll(IntSet other) Test if this set is a superset of another set
IntSet	copy() Create a copy of this IntSet that leaves the original unchanged.
IntSet	except(IntSet other) Form a new set that is the difference of this set and another set.
static IntEmptySet	getInstance()
IntSet	intersect(IntSet other) Form a new set that is the intersection of this IntSet and another.
boolean	isEmpty() Determine if the set is empty
IntIterator	iterator() Get an iterator over the values
IntSet	mutableCopy() Create a copy of this IntSet that contains the same set of integers.
boolean	remove(int value) Remove an integer from the set
int	size() Get the number of integers in the set
IntSet	union(IntSet other) Form a new set that is the union of this IntSet and another.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static IntEmptySet getInstance()

copy

public IntSet copy()

Description copied from interface: IntSet

Create a copy of this IntSet that leaves the original unchanged.

Specified by:

copy in interface IntSet

Returns:

an IntSet containing the same integers. The result will not necessarily be the same class as the original. It will either be an immutable object, or a newly constructed object.

mutableCopy

public IntSet mutableCopy()

Description copied from interface: IntSet

Create a copy of this IntSet that contains the same set of integers.

Specified by:

mutableCopy in interface IntSet

Returns:

an IntSet containing the same integers. The result will not necessarily be the same class as the original. It will always be a mutable object

clear

public void clear()

Description copied from interface: IntSet

Clear the contents of the IntSet (making it an empty set)

Specified by:

clear in interface IntSet

size

public int size()

Description copied from interface: IntSet

Get the number of integers in the set

Specified by:

size in interface IntSet

Returns:

the size of the set

isEmpty

public boolean isEmpty()

Description copied from interface: IntSet

Determine if the set is empty

Specified by:

isEmpty in interface IntSet

Returns:

true if the set is empty, false if not

contains

public boolean contains(int value)

Description copied from interface: IntSet

Determine whether a particular integer is present in the set

Specified by:

contains in interface IntSet

Parameters:

value - the integer under test

Returns:

true if value is present in the set, false if not

remove

public boolean remove(int value)

Description copied from interface: IntSet

Remove an integer from the set

Specified by:

remove in interface IntSet

Parameters:

value - the integer to be removed

Returns:

true if the integer was present in the set, false if it was not present

add

public boolean add(int value)

Description copied from interface: IntSet

Add an integer to the set

Specified by:

add in interface IntSet

Parameters:

value - the integer to be added

Returns:

true if the integer was added, false if it was already present

iterator

public IntIterator iterator()

Description copied from interface: IntSet

Get an iterator over the values

Specified by:

iterator in interface IntSet

Returns:

an iterator over the integers in the set

union

public IntSet union(IntSet other)

Description copied from interface: IntSet

Form a new set that is the union of this IntSet and another. The result will either be an immutable object, or a newly constructed object.

Specified by:

union in interface IntSet

Parameters:

other - the second set

Returns:

the union of the two sets

intersect

public IntSet intersect(IntSet other)

Description copied from interface: IntSet

Form a new set that is the intersection of this IntSet and another. The result will either be an immutable object, or a newly constructed object.

Specified by:

intersect in interface IntSet

Parameters:

other - the second set

Returns:

the intersection of the two sets

except

public IntSet except(IntSet other)

Description copied from interface: IntSet

Form a new set that is the difference of this set and another set. The result will either be an immutable object, or a newly constructed object.

Specified by:

except in interface IntSet

Parameters:

other - the second set

Returns:

the intersection of the two sets

containsAll

public boolean containsAll(IntSet other)

Description copied from interface: IntSet

Test if this set is a superset of another set

Specified by:

containsAll in interface IntSet

Parameters:

other - the other set

Returns:

true if every integer in the other set is also present in this set