Class SumWeight

    • Field Detail

      • idNumber

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

        protected final IntVar[] list
        It specifies a list of variables being summed.
      • weights

        protected final long[] weights
        It specifies a list of weights associated with the variables being summed.
      • equalTo

        protected final long equalTo
        It specifies value to which SumWeight is equal to.
      • sumGrounded

        private TimeStamp<java.lang.Long> sumGrounded
        The sum of grounded variables.
      • nextGroundedPosition

        private TimeStamp<java.lang.Integer> nextGroundedPosition
        The position for the next grounded variable.
      • variableQueue

        java.util.LinkedHashSet<IntVar> variableQueue
      • lMin

        private long lMin
      • lMax

        private long lMax
      • lMinArray

        private long[] lMinArray
      • lMaxArray

        private long[] lMaxArray
      • positionMaping

        private java.util.Map<Var,​java.lang.Integer> positionMaping
      • backtrackHasOccured

        private boolean backtrackHasOccured
    • Constructor Detail

      • SumWeight

        public SumWeight​(IntVar[] list,
                         int[] weights,
                         IntVar sum)
        Parameters:
        list - the list of varibales
        weights - the list of weights
        sum - the resulting sum
      • SumWeight

        public SumWeight​(IntVar[] list,
                         int[] weights,
                         int equalTo)
        Parameters:
        list - the list of varibales
        weights - the list of weights
        equalTo - the value to which SumWeight is equal to.
      • SumWeight

        private SumWeight​(IntVar[] list,
                          int[] weights,
                          IntVar sum,
                          int equalTo)
      • SumWeight

        public SumWeight​(java.util.List<? extends IntVar> variables,
                         java.util.List<java.lang.Integer> weights,
                         IntVar sum)
        It constructs the constraint SumWeight.
        Parameters:
        variables - variables which are being multiplied by weights.
        weights - weight for each variable.
        sum - variable containing the sum of weighted variables.
    • Method Detail

      • removeLevelLate

        public void removeLevelLate​(int level)
        Description copied from interface: RemoveLevelLate
        This function is called in case of the backtrack. It is called after all timestamps, variables, mutablevariables have reverted to their values *after* removing the level.
        Specified by:
        removeLevelLate in interface RemoveLevelLate
        Parameters:
        level - the level which is being removed.
      • 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.
      • divRoundDown

        private long divRoundDown​(long a,
                                  long b)
      • divRoundUp

        private long divRoundUp​(long a,
                                long b)
      • 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 var)
        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.
        var - variable which has changed.
      • treatChangedVariables

        private void treatChangedVariables()
      • 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.
      • checkForOverflow

        void checkForOverflow()
      • 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