Module org.chocosolver

Package org.chocosolver.solver.constraints.nary.alldifferent

Class PropAllDiffAdaptative

java.lang.Object

org.chocosolver.solver.constraints.Propagator<IntVar>

org.chocosolver.solver.constraints.nary.alldifferent.PropAllDiffAC

org.chocosolver.solver.constraints.nary.alldifferent.PropAllDiffAdaptative

All Implemented Interfaces:

Comparable<Propagator>, ICause, Identity

public class PropAllDiffAdaptative
extends PropAllDiffAC

Probabilistic Propagator for AllDifferent AC constraint for integer variables introduced to avoid loosing too much time in AC propagation when BC is sufficientss The more this propagator triggers filtering and failure, the more likely it will be called If it does not bring improvement, this propagator will be called less during search

Author:

Jean-Guillaume Fages

Field Summary

Fields inherited from class org.chocosolver.solver.constraints.nary.alldifferent.PropAllDiffAC

filter

Fields inherited from class org.chocosolver.solver.constraints.Propagator

ACTIVE, constraint, DEFAULT_EXPL, model, operations, OUTPUT_DEFAULT_EXPL, priority, reactToFineEvt, state, vars

Constructor Summary

Constructors

Constructor	Description
PropAllDiffAdaptative(IntVar[] variables)	AllDifferent constraint for integer variables enables to control the cardinality of the matching

Method Summary

Modifier and Type	Method	Description
void	propagate(int evtmask)	Call the main filtering algorithm to apply to the Domain of the Variable objects.

Methods inherited from class org.chocosolver.solver.constraints.nary.alldifferent.PropAllDiffAC

isEntailed

Methods inherited from class org.chocosolver.solver.constraints.Propagator

addVariable, arity, compareTo, defaultExplain, doFinePropagation, doFlush, doSchedule, doScheduleEvent, dynPriority, equals, explain, fails, forcePropagate, forcePropagationOnBacktrack, forEachIntVar, getConstraint, getId, getModel, getNbVars, getPosition, getPriority, getPropagationConditions, getVar, getVars, getVIndice, getVIndices, hashCode, isActive, isCompletelyInstantiated, isPassive, isReified, isReifiedAndSilent, isScheduled, isStateLess, linkVariables, propagate, reactToFineEvent, reifiedWith, setActive, setActive0, setPassive, setPosition, setReifiedSilent, setReifiedTrue, setVIndices, toString, unlinkVariables, unschedule

Methods inherited from class java.lang.Object

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

Constructor Detail

PropAllDiffAdaptative

public PropAllDiffAdaptative(IntVar[] variables)

AllDifferent constraint for integer variables enables to control the cardinality of the matching

Parameters:

variables - array of integer variables

Method Detail

propagate

public void propagate(int evtmask)
               throws ContradictionException

Description copied from class: Propagator

Call the main filtering algorithm to apply to the Domain of the Variable objects. It considers the current state of this objects to remove some values from domains and/or instantiate some variables. Calling this method is done from 2 (and only 2) steps:
- at the initial propagation step,
- when involved in a reified constraint.
It should initialized the internal data structure and apply filtering algorithm from scratch.

Overrides:

propagate in class PropAllDiffAC

Parameters:

evtmask - type of propagation event this must consider.

Throws:

ContradictionException - when a contradiction occurs, like domain wipe out or other incoherencies.