Package org.jacop.constraints

Class Min

  • All Implemented Interfaces:
    SatisfiedPresent
    public class Min
extends Constraint
implements SatisfiedPresent
    Min constraint implements the minimum/2 constraint. It provides the minimum varable from all FD varaibles on the list.
    Version:
    4.8

    • Field Detail

      • idNumber

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

      • list

        public final IntVar[] list
        It specifies a list of variables among which the minimum value is being searched for.

      • min

        public final IntVar min
        It specifies variable min, which stores the minimum value within the whole list.

      • l

        final int l
        It specifies the length of the list.

      • position

        private TimeStamp<java.lang.Integer> position
        Defines first position of the variable that needs to be considered

    • Constructor Detail

      • Min

        public Min​(IntVar[] list,
           IntVar min)
        It constructs min constraint.
        Parameters:
        min - variable denoting the minimal value
        list - the array of variables for which the minimal value is imposed.

      • Min

        public Min​(java.util.List<? extends IntVar> list,
           IntVar min)
        It constructs min constraint.
        Parameters:
        min - variable denoting the minimal value
        list - the array of variables for which the minimal value is imposed.

    • 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.

      • swap

        private void swap​(int i,
                  int j)

      • 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.

      • 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