- java.lang.Object
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- org.chocosolver.solver.constraints.Propagator<IntVar>
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- org.chocosolver.solver.constraints.nary.sort.PropKeysorting
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- All Implemented Interfaces:
Comparable<Propagator>
,ICause
,Identity
public final class PropKeysorting extends Propagator<IntVar>
Based on Technical Report from Mats Carlsson: "Propagating THE KEYSORTING Constraint" - Sept. 15, 2014.- Since:
- 02 feb. 2015
- Author:
- Charles Prud'homme
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Field Summary
Fields Modifier and Type Field Description protected ArraySort
sorter
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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 PropKeysorting(IntVar[][] x, IntVar[][] y, IntVar[] p, int key)
Creates a newPropSort
instance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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.-
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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Field Detail
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sorter
protected final ArraySort sorter
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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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