Class PropKeysorting

  • 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.
    02 feb. 2015
    Charles Prud'homme
    • Field Detail

    • Constructor Detail

      • PropKeysorting

        public PropKeysorting​(IntVar[][] x,
                              IntVar[][] y,
                              IntVar[] p,
                              int key)
        Creates a new PropSort instance.
        x - the first array of integer variables
        y - the second array of integer variables
    • Method Detail

      • 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>
        ESat.TRUE if entailed, ESat.FALSE if not entailed, ESat.UNDEFINED if unknown
      • 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>
        evtmask - type of propagation event this must consider.
        ContradictionException - when a contradiction occurs, like domain wipe out or other incoherencies.