Package org.jacop.constraints

Class Values

java.lang.Object
org.jacop.constraints.DecomposedConstraint<Constraint>
org.jacop.constraints.Constraint
org.jacop.constraints.Values
All Implemented Interfaces:
SatisfiedPresent
public class Values extends Constraint implements SatisfiedPresent
Constraint Values counts number of different values on a list of Variables.
Version:
4.10

  • Field Details

    • idNumber

      static final AtomicInteger idNumber

    • list

      protected final IntVar[] list
      It specifies a list of variables which are counted.

    • count

      protected final IntVar count
      It specifies the idNumber of different values among variables on a given list.

    • minFDV

      Comparator<IntVar> minFDV

    • debug

      private static final boolean debug
      See Also:

  • Constructor Details

    • Values

      public Values(IntVar[] list, IntVar count)
      It constructs Values constraint.
      Parameters:
      list - list of variables for which different values are being counted.
      count - specifies the number of different values in the list.

    • Values

      public Values(List<? extends IntVar> list, IntVar count)
      It constructs Values constraint.
      Parameters:
      list - list of variables for which different values are being counted.
      count - specifies the number of different values in the list.

  • Method Details

    • 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.

    • toString

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

    • getDefaultConsistencyPruningEvent

      public int getDefaultConsistencyPruningEvent()
      Specified by:
      getDefaultConsistencyPruningEvent in class Constraint

    • 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.