org.chocosolver.solver.constraints.nary.channeling

Class PropEnumDomainChanneling

java.lang.Object

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

org.chocosolver.solver.constraints.nary.channeling.PropEnumDomainChanneling

All Implemented Interfaces:

Serializable, Comparable<Propagator>, ICause, Identity

public class PropEnumDomainChanneling
extends Propagator<IntVar>

Constraints that map the boolean assignments variables (bvars) with the standard assignment variables (var). var = i <-> bvars[i-offSet] = true

Since:

22/05/13

Author:

Jean-Guillaume Fages

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected IIntDeltaMonitor	idm
protected int	n
protected int	offSet
protected IntProcedure	rem_proc

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

aCause, ACTIVE, constraint, LOGGER, NEW, PASSIVE, priority, reactToFineEvt, REIFIED, solver, vars

Constructor Summary

Constructors

Constructor and Description
PropEnumDomainChanneling(BoolVar[] bvars, IntVar aVar, int offSet)

Method Summary

Methods

Modifier and Type	Method and Description
void	duplicate(Solver solver, gnu.trove.map.hash.THashMap<Object,Object> identitymap) Duplicate the current propagator.
ESat	isEntailed() Check wether this is entailed according to the current state of its internal structure.
void	propagate(int evtmask) Call the main filtering algorithm to apply to the Domain of the Variable objects.
void	propagate(int varIdx, int mask) Incremental filtering algorithm defined within the Propagator, called whenever the variable of index idxVarInProp has changed.

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

addVariable, advise, arity, compareTo, contradiction, decNbPendingEvt, defineIn, dynPriority, flushPendingEvt, forcePropagate, getConstraint, getId, getNbPendingEvt, getNbVars, getPriority, getPropagationConditions, getSolver, getVar, getVars, getVIndices, hashCode, incNbPendingEvt, isActive, isCompletelyInstantiated, isPassive, isReifiedAndSilent, isStateLess, reactToFineEvent, setActive, setPassive, setReifiedSilent, setReifiedTrue, setVIndices, toString, why

Methods inherited from class java.lang.Object

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

Field Detail

n

protected final int n

rem_proc

protected final IntProcedure rem_proc

idm

protected final IIntDeltaMonitor idm

offSet

protected final int offSet

Constructor Detail

PropEnumDomainChanneling

public PropEnumDomainChanneling(BoolVar[] bvars,
                        IntVar aVar,
                        int offSet)

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.

Specified by:

propagate in class Propagator<IntVar>

Parameters:

evtmask - type of propagation event this must consider.

Throws:

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

propagate

public void propagate(int varIdx,
             int mask)
               throws ContradictionException

Description copied from class: Propagator

Incremental filtering algorithm defined within the Propagator, called whenever the variable of index idxVarInProp has changed. This method calls a CUSTOM_PROPAGATION (coarse-grained) by default.

This method should be overridden if the argument reactToFineEvt is set to true in the constructor. Otherwise, it executes propagate(PropagatorEventType.CUSTOM_PROPAGATION.getStrengthenedMask());

Overrides:

propagate in class Propagator<IntVar>

Parameters:

varIdx - index of the variable var in this

mask - type of event

Throws:

ContradictionException - if a contradiction occurs

isEntailed

public ESat isEntailed()

Description copied from class: Propagator

Check wether this is entailed according to the current state of its internal structure. At least, should check the satisfaction of this (when all is instantiated).

Specified by:

isEntailed in class Propagator<IntVar>

Returns:

ESat.TRUE if entailed, ESat.FALSE if not entailed, ESat.UNDEFINED if unknown

duplicate

public void duplicate(Solver solver,
             gnu.trove.map.hash.THashMap<Object,Object> identitymap)

Description copied from class: Propagator

Duplicate the current propagator. A restriction is that the resolution process should have not begun yet. That's why state of the propagator may not be duplicated.

Overrides:

duplicate in class Propagator<IntVar>

Parameters:

solver - the target solver

identitymap - a map to ensure uniqueness of objects