net.axyana.qizxopen.util
Class IdSet

java.lang.Object
  net.axyana.qizxopen.util.IdSet

Direct Known Subclasses:

BitIdSet, DifferenceIdSet, IntersectionIdSet

public abstract class IdSet

extends java.lang.Object

An abstract set of identifiers (positive integers).

Constructor Summary

IdSet()

Method Summary

abstract IdSet	copy()
abstract int	getNext(int id) Iteration mechanism: returns the first id in the set that is greater or equal to argument.
boolean	intersects(IdSet that) returns true if the intersection of the two sets is not empty.
boolean	isEmpty()
abstract boolean	test(int id) Identifier containment test.

Methods inherited from class java.lang.Object

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

Constructor Detail

IdSet

public IdSet()

Method Detail

test

public abstract boolean test(int id)

Identifier containment test.

getNext

public abstract int getNext(int id)

Iteration mechanism: returns the first id in the set that is greater or equal to argument.

Returns:

-1 if no next id.

isEmpty

public boolean isEmpty()

intersects

public boolean intersects(IdSet that)

returns true if the intersection of the two sets is not empty.

copy

public abstract IdSet copy()