Class Match

All Implemented Interfaces:
SatisfiedPresent

public class Match extends Constraint implements SatisfiedPresent
This constraint matches the elements of the given set variable onto a list of integer variables.
Version:
4.8
  • Field Details

    • idNumber

      static AtomicInteger idNumber
    • a

      public SetVar a
      It specifies a set variable whose values are being matched against integer variables from the list.
    • list

      public IntVar[] list
      It specifies the list of integer variables which value is being matched against elements from a set variable a.
  • Constructor Details

    • Match

      public Match(SetVar a, IntVar[] list)
      It constructs a match constraint to connect the value of set variable a to the values of integer variables provided in the list.
      Parameters:
      a - set variable that is restricted to be equal to a set created from values specified by integer variables form the list.
      list - of integer variables that is restricted to have the same elements as set variable a.
  • 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.
    • getConsistencyPruningEvent

      public int getConsistencyPruningEvent(Var var)
      Description copied from class: Constraint
      It retrieves the pruning event which causes reevaluation of the constraint.
      Overrides:
      getConsistencyPruningEvent in class Constraint
      Parameters:
      var - variable for which pruning event is retrieved
      Returns:
      it returns the int code of the pruning event (GROUND, BOUND, ANY, NONE)
    • 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.
    • toString

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