Class WeightedDegree<T extends Var>

  • Type Parameters:
    T - type of variable being compared.
    All Implemented Interfaces:
    ComparatorVariable<T>

    public class WeightedDegree<T extends Var>
    extends java.lang.Object
    implements ComparatorVariable<T>
    Defines a WeightedDegree comparator for variables. Every time a constraint failure is encountered all variables within the scope of that constraints have increased weight. The comparator will choose the variable with the highest weight divided by its size. This implementation is not equivalent to AFCMaxDeg since it takes all accumulated failures for a variable while AFCMaxDeg sums up weights for still active constraints only!
    Version:
    4.8
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int compare​(float left, T var)
      It compares the baseline metric to the variable metric.
      int compare​(T leftVar, T rightVar)
      It compares the metric of the left variable against the right one.
      float metric​(T var)
      It returns the metric of the variable given according to the comparator.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • WeightedDegree

        private WeightedDegree()
      • WeightedDegree

        public WeightedDegree​(Store store)
    • Method Detail

      • compare

        public int compare​(float left,
                           T var)
        Description copied from interface: ComparatorVariable
        It compares the baseline metric to the variable metric.
        Specified by:
        compare in interface ComparatorVariable<T extends Var>
        Parameters:
        left - the baseline for comparison.
        var - variable which is compared to baseline.
        Returns:
        1 if metric is larger than variable, 0 if equal, -1 if baseline is smaller.
      • compare

        public int compare​(T leftVar,
                           T rightVar)
        Description copied from interface: ComparatorVariable
        It compares the metric of the left variable against the right one.
        Specified by:
        compare in interface ComparatorVariable<T extends Var>
        Parameters:
        leftVar - left variable
        rightVar - right variable
        Returns:
        1 if metric for left variable is greater, 0 is they are equal, -1 if smaller.
      • metric

        public float metric​(T var)
        Description copied from interface: ComparatorVariable
        It returns the metric of the variable given according to the comparator.
        Specified by:
        metric in interface ComparatorVariable<T extends Var>
        Parameters:
        var - variable for which metric is computed.
        Returns:
        the metric of the variable according to the comparator.