Class PropCircuitSCC
- java.lang.Object
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- org.chocosolver.solver.constraints.Propagator<IntVar>
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- org.chocosolver.solver.constraints.nary.circuit.PropCircuitSCC
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- All Implemented Interfaces:
Comparable<Propagator>
,ICause
,Identity
public class PropCircuitSCC extends Propagator<IntVar>
Filters circuit based on strongly connected components (see the TechReport "Improving the Asymmetric TSP by considering graph structure", Fages & Lorca, 2012)- Author:
- Jean-Guillaume Fages
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Field Summary
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Fields inherited from class org.chocosolver.solver.constraints.Propagator
ACTIVE, constraint, DEFAULT_EXPL, model, operations, OUTPUT_DEFAULT_EXPL, priority, reactToFineEvt, state, vars
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Constructor Summary
Constructors Constructor Description PropCircuitSCC(IntVar[] succs, int offSet, CircuitConf conf)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
filterFromSource(int source)
ESat
isEntailed()
Check wetherthis
is entailed according to the current state of its internal structure.void
propagate(int evtmask)
Call the main filtering algorithm to apply to theDomain
of theVariable
objects.void
rebuild(int source)
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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
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Constructor Detail
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PropCircuitSCC
public PropCircuitSCC(IntVar[] succs, int offSet, CircuitConf conf)
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Method Detail
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isEntailed
public ESat isEntailed()
Description copied from class:Propagator
Check wetherthis
is entailed according to the current state of its internal structure. At least, should check the satisfaction ofthis
(when all is instantiated).- Specified by:
isEntailed
in classPropagator<IntVar>
- Returns:
- ESat.TRUE if entailed, ESat.FALSE if not entailed, ESat.UNDEFINED if unknown
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propagate
public void propagate(int evtmask) throws ContradictionException
Description copied from class:Propagator
Call the main filtering algorithm to apply to theDomain
of theVariable
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 classPropagator<IntVar>
- Parameters:
evtmask
- type of propagation eventthis
must consider.- Throws:
ContradictionException
- when a contradiction occurs, like domain wipe out or other incoherencies.
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filterFromSource
public void filterFromSource(int source) throws ContradictionException
- Throws:
ContradictionException
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rebuild
public void rebuild(int source)
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