Class Linear

    • Field Detail

      • idNumber

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

        static final byte[] negRel
        Defines negated relations
      • relationType

        public byte relationType
        It specifies what relations is used by this constraint
      • list

        public FloatVar[] list
        It specifies a list of variables being summed.
      • weights

        public double[] weights
        It specifies a list of weights associated with the variables being summed.
      • sum

        public double sum
        It specifies variable for the overall sum.
      • reified

        boolean reified
      • linearTree

        BTree linearTree
    • Constructor Detail

      • Linear

        public Linear​(Store store,
                      FloatVar[] list,
                      double[] weights,
                      java.lang.String rel,
                      double sum)
        Parameters:
        store - current store
        list - variables which are being multiplied by weights.
        weights - weight for each variable.
        rel - the relation, one of "==", "<", ">", "<=", ">=", "!="
        sum - the sum of weighted variables.
      • Linear

        public Linear​(Store store,
                      FloatVar[] list,
                      double[] weights,
                      java.lang.String rel,
                      FloatVar sum)
        Parameters:
        store - current store
        list - variables which are being multiplied by weights.
        weights - weight for each variable.
        rel - the relation, one of "==", "<", ">", "<=", ">=", "!="
        sum - variable containing the sum of weighted variables.
      • Linear

        public Linear​(Store store,
                      java.util.List<? extends FloatVar> variables,
                      java.util.List<java.lang.Double> weights,
                      java.lang.String rel,
                      double sum)
        It constructs the constraint Linear.
        Parameters:
        store - current store
        variables - variables which are being multiplied by weights.
        weights - weight for each variable.
        rel - the relation, one of "==", "<", ">", "<=", ">="
        sum - variable containing the sum of weighted variables.
    • Method Detail

      • commonInitialization

        private void commonInitialization​(Store store,
                                          FloatVar[] list,
                                          double[] weights,
                                          java.lang.String rel,
                                          double sum)
      • 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.
      • notConsistency

        public void notConsistency​(Store store)
        Description copied from class: PrimitiveConstraint
        It makes pruning in such a way that constraint is notConsistent. It removes values which always belong to a solution.
        Specified by:
        notConsistency in class PrimitiveConstraint
        Parameters:
        store - the constraint store in which context the notConsistency technique is evaluated.
      • pruneRelation

        private void pruneRelation()
      • impose

        public void impose​(Store store)
        Description copied from class: Constraint
        It imposes the constraint in a given store.
        Overrides:
        impose in class PrimitiveConstraint
        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.
      • 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.
      • notSatisfied

        public boolean notSatisfied()
        Description copied from class: PrimitiveConstraint
        It checks if constraint would be always not satisfied.
        Specified by:
        notSatisfied in class PrimitiveConstraint
        Returns:
        true if constraint must be notSatisfied, false otherwise.
      • entailed

        private boolean entailed​(byte rel)
      • checkForOverflow

        void checkForOverflow()
      • relation

        public byte relation​(java.lang.String r)
      • rel2String

        public java.lang.String rel2String()
      • 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