org.chocosolver.solver.constraints.extension.nary

Class PropLargeGACSTRPos

java.lang.Object

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

org.chocosolver.solver.constraints.extension.nary.PropLargeCSP<TuplesList>

org.chocosolver.solver.constraints.extension.nary.PropLargeGACSTRPos

All Implemented Interfaces:

Serializable, Comparable<Propagator>, ICause, Identity

public class PropLargeGACSTRPos
extends PropLargeCSP<TuplesList>

GAC maintaind by STR

Since:

24/04/2014

Author:

Charles Prud'homme, Hadrien Cambazard

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	arity size of the scope
protected gnu.trove.list.TIntList	futureVars Variables that are not proved to be GAC yet
protected BitSet[]	gacValues Values that have found a support for each variable
protected IStateInt	last The backtrackable list of tuples representing the current allowed tuples of the constraint
protected int[]	nbGacValues
protected int[]	offsets original lower bounds
protected ValidityChecker	valcheck

Fields inherited from class org.chocosolver.solver.constraints.extension.nary.PropLargeCSP

relation

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
PropLargeGACSTRPos(IntVar[] vs, Tuples tuples)

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.
void	filter()
void	gacstr() Main propagation loop.
double	getCartesianProduct()
void	initializeData()
void	maintainList() maintain the list by checking all variable within isValid
void	propagate(int evtmask) Call the main filtering algorithm to apply to the Domain of the Variable objects.
void	propagate(int idxVarInProp, int mask) Incremental filtering algorithm defined within the Propagator, called whenever the variable of index idxVarInProp has changed.
void	pruningPhase()

Methods inherited from class org.chocosolver.solver.constraints.extension.nary.PropLargeCSP

getRelation, isEntailed, toString

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, why

Methods inherited from class java.lang.Object

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

Field Detail

valcheck

protected ValidityChecker valcheck

arity

protected int arity

size of the scope

offsets

protected int[] offsets

original lower bounds

futureVars

protected gnu.trove.list.TIntList futureVars

Variables that are not proved to be GAC yet

gacValues

protected BitSet[] gacValues

Values that have found a support for each variable

nbGacValues

protected int[] nbGacValues

last

protected IStateInt last

The backtrackable list of tuples representing the current allowed tuples of the constraint

Constructor Detail

PropLargeGACSTRPos

public PropLargeGACSTRPos(IntVar[] vs,
                  Tuples tuples)

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 idxVarInProp,
             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:

idxVarInProp - index of the variable var in this

mask - type of event

Throws:

ContradictionException - if a contradiction occurs

initializeData

public void initializeData()

pruningPhase

public void pruningPhase()
                  throws ContradictionException

Throws:

ContradictionException

maintainList

public void maintainList()

maintain the list by checking all variable within isValid

gacstr

public void gacstr()
            throws ContradictionException

Main propagation loop. It maintains the list of valid tuples through the search

Throws:

ContradictionException

getCartesianProduct

public double getCartesianProduct()

filter

public void filter()
            throws ContradictionException

Throws:

ContradictionException

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