Class AeqS

All Implemented Interfaces:
SatisfiedPresent, StoreAware

public class AeqS extends PrimitiveConstraint
It creates an equality constraint to make sure that a set variable is equal to a given set.
Version:
4.8
  • Field Details

    • idNumber

      static AtomicInteger idNumber
    • a

      public SetVar a
      It specifies set variable a, which must be equal to set variable b.
    • set

      public IntDomain set
      It specifies the set which must be equal to set variable a.
    • sizeOfB

      int sizeOfB
      It specifies the size of b.
  • Constructor Details

    • AeqS

      public AeqS(SetVar a, IntDomain set)
      It constructs an AeqS constraint to restrict the domain of the variables.
      Parameters:
      a - variable a that is forced to be equal to a specified set value.
      set - it specifies the set to which variable a must be equal to.
  • 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.
    • getDefaultConsistencyPruningEvent

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

      public int getNotConsistencyPruningEvent(Var var)
      Description copied from class: PrimitiveConstraint
      It retrieves the pruning event which causes reevaluation of the constraint notConsistency() function.
      Overrides:
      getNotConsistencyPruningEvent in class PrimitiveConstraint
      Parameters:
      var - for which pruning event is retrieved
      Returns:
      the int denoting the pruning event associated with given variable.
    • notConsistency

      public void notConsistency(Store store)
      Description copied from class: PrimitiveConstraint
      It makes pruning in such a way that constraint is notConsistent. It removes values which always belong to a solution.
      Specified by:
      notConsistency in class PrimitiveConstraint
      Parameters:
      store - the constraint store in which context the notConsistency technique is evaluated.
    • notSatisfied

      public boolean notSatisfied()
      Description copied from class: PrimitiveConstraint
      It checks if constraint would be always not satisfied.
      Specified by:
      notSatisfied in class PrimitiveConstraint
      Returns:
      true if constraint must be notSatisfied, false otherwise.
    • 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.

      Returns:
      true if constraint is possible to verify that it is satisfied.
    • getDefaultNestedNotConsistencyPruningEvent

      protected int getDefaultNestedNotConsistencyPruningEvent()
      Overrides:
      getDefaultNestedNotConsistencyPruningEvent in class PrimitiveConstraint
    • getDefaultNestedConsistencyPruningEvent

      protected int getDefaultNestedConsistencyPruningEvent()
      Overrides:
      getDefaultNestedConsistencyPruningEvent in class PrimitiveConstraint
    • getDefaultNotConsistencyPruningEvent

      protected int getDefaultNotConsistencyPruningEvent()
      Specified by:
      getDefaultNotConsistencyPruningEvent in class PrimitiveConstraint
    • toString

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