Class AintersectBeqC

    • Field Detail

      • idNumber

        static java.util.concurrent.atomic.AtomicInteger idNumber
      • a

        public SetVar a
        It specifies set variable a.
      • b

        public SetVar b
        It specifies set variable b.
      • c

        public SetVar c
        It specifies set variable c.
      • performCardinalityReasoning

        public boolean performCardinalityReasoning
        It specifies if the constrain attempts to perform expensive and yet unlikely propagation due to cardinality information.
      • aHasChanged

        private boolean aHasChanged
      • bHasChanged

        private boolean bHasChanged
      • cHasChanged

        private boolean cHasChanged
    • Constructor Detail

      • AintersectBeqC

        public AintersectBeqC​(SetVar a,
                              SetVar b,
                              SetVar c)
        It constructs an AintersectBeqC constraint.
        Parameters:
        a - set variable a, which is being intersected with set variable b.
        b - set variable b, which is being intersected with set variable a.
        c - variable that is restricted to be the intersection of a and b.
    • 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.
      • 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
      • queueVariable

        public void queueVariable​(int level,
                                  Var variable)
        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.
        variable - variable which has changed.