Class CountValuesBounds

All Implemented Interfaces:
SatisfiedPresent

public class CountValuesBounds extends Constraint implements SatisfiedPresent
CountValuesBounds constraint implements the counting over numbers of occurrences of a given vector of values in a list of variables. The number of occurrences is specified by lower and upper bounds.
Version:
4.9
  • Field Details

    • idNumber

      static final AtomicInteger idNumber
    • counter

      public final CountValuesBounds.Bounds[] counter
      It counts the number of occurences of the specified value in a list.
    • lb

      int[] lb
    • ub

      int[] ub
    • counterRest

      public final CountValuesBounds.Bounds counterRest
    • extendedCounter

      public final CountValuesBounds.Bounds[] extendedCounter
    • list

      public final IntVar[] list
      The list of variables which are checked and counted if equal to specified value.
    • n

      private final int n
    • values

      public final int[] values
      The value to which is any variable is equal to makes the constraint count it.
    • valuesDomain

      final IntDomain valuesDomain
    • valuesDomainComplement

      final IntDomain valuesDomainComplement
    • position

      private TimeStamp<Integer> position
    • equal

      private TimeStamp<Integer>[] equal
    • rest

      private TimeStamp<Integer> rest
  • Constructor Details

    • CountValuesBounds

      public CountValuesBounds(IntVar[] list, int[] lb, int[] ub, int[] values)
      It constructs a CountValuesBounds constraint.
      Parameters:
      values - values that are counted
      list - variables which equality to values is counted.
      lb - minimal number of variables equal to a value.
      ub - maximal number of variables equal to a value.
    • CountValuesBounds

      public CountValuesBounds(List<? extends IntVar> list, int[] lb, int[] ub, int[] values)
      It constructs a CountValuesBounds constraint.
      Parameters:
      values - values that are counted
      list - variables which equality to values is counted.
      lb - minimal number of variables equal to a value.
      ub - maximal number of variables equal to a value.
  • Method Details

    • 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.
    • getDefaultConsistencyPruningEvent

      public int getDefaultConsistencyPruningEvent()
      Specified by:
      getDefaultConsistencyPruningEvent in class Constraint
    • 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)
    • 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 String toString()
      Description copied from class: Constraint
      It produces a string representation of a constraint state.
      Overrides:
      toString in class Constraint