Class Alldifferent

    • Field Detail

      • idNumber

        static final java.util.concurrent.atomic.AtomicInteger idNumber
      • list

        public IntVar[] list
        It specifies a list of variables which must take different values.
      • variableQueue

        java.util.LinkedHashSet<IntVar> variableQueue
      • positionMapping

        protected java.util.Map<IntVar,​java.lang.Integer> positionMapping
      • grounded

        protected TimeStamp<java.lang.Integer> grounded
    • Constructor Detail

      • Alldifferent

        protected Alldifferent()
      • Alldifferent

        public Alldifferent​(IntVar[] list)
        It constructs the alldifferent constraint for the supplied variable.
        Parameters:
        list - variables which are constrained to take different values.
      • Alldifferent

        public Alldifferent​(java.util.List<? extends IntVar> variables)
        It constructs the alldifferent constraint for the supplied variable.
        Parameters:
        variables - variables which are constrained to take different values.
    • Method Detail

      • consistency

        public void consistency​(Store store)
        Description copied from class: Constraint
        It is a (most probably incomplete) consistency function which removes the values from variables domains. Only values which do not have any support in a solution space are removed.
        Specified by:
        consistency in class Constraint
        Parameters:
        store - constraint store within which the constraint consistency is being checked.
      • satisfied

        public boolean satisfied()
        Description copied from interface: SatisfiedPresent
        It checks if the constraint is satisfied. It can return false even if constraint is satisfied but not all variables in its scope are grounded. It needs to return true if all variables in its scope are grounded and constraint is satisfied.

        Implementations of this interface for constraints that are not PrimitiveConstraint may require constraint imposition and consistency check as a requirement to work correctly.

        Specified by:
        satisfied in interface SatisfiedPresent
        Returns:
        true if constraint is possible to verify that it is satisfied.
      • satisfiedFullCheck

        private boolean satisfiedFullCheck​(Store S)
      • notSatisfied

        public boolean notSatisfied()
        Check whether the constraint is not satisfied based on bipartite graph matching.
        Returns:
        true if constraint is not satisfied
      • impose

        public void impose​(Store store)
        Description copied from class: Constraint
        It imposes the constraint in a given store.
        Overrides:
        impose in class Constraint
        Parameters:
        store - the constraint store to which the constraint is imposed to.
      • queueVariable

        public void queueVariable​(int level,
                                  Var V)
        Description copied from class: Constraint
        This is a function called to indicate which variable in a scope of constraint has changed. It also indicates a store level at which the change has occurred.
        Overrides:
        queueVariable in class Constraint
        Parameters:
        level - the level of the store at which the change has occurred.
        V - variable which has changed.
      • satisfiedBound

        private boolean satisfiedBound()
      • toString

        public java.lang.String toString()
        Description copied from class: Constraint
        It produces a string representation of a constraint state.
        Overrides:
        toString in class Constraint