Class Conditional

All Implemented Interfaces:
SatisfiedPresent

public class Conditional extends Constraint implements SatisfiedPresent
Conditional constraint implements conditional constraint satisfiability. It enforces consistency of constraint c[k] where b[k] = 1 (true) and all b[i] for i < k are 0 (false).
Version:
4.10
  • Field Details

    • idNumber

      static final AtomicInteger idNumber
    • b

      public final IntVar[] b
      The list of 0/1 (Boolean) variables for assignment decision.
    • c

      public final PrimitiveConstraint[] c
      The list of constraints that are to be selected.
  • Constructor Details

    • Conditional

      public Conditional(IntVar[] b, PrimitiveConstraint[] c)
      It constructs a Conditional constraint.
      Parameters:
      b - 0/1 variables for selection of constraint
      c - constraints for selection.
    • Conditional

      public Conditional(List<? extends IntVar> b, List<? extends PrimitiveConstraint> c)
      It constructs a Conditional constraint.
      Parameters:
      b - 0/1 variables for selection of constraint
      c - constraints for selection.
  • Method Details

    • 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.
    • 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