Class ChannelIntSet

All Implemented Interfaces:
SatisfiedPresent

public class ChannelIntSet extends Constraint implements SatisfiedPresent
Channel constraint requires that array of int variables x and array of set variables y are related such that (x[i] = j) <-> (i in s[j]). Indexes start form 0, both for integer and set variables, by default. To define other starting index use offset definitions.
Version:
4.10
  • Field Details

    • idNumber

      static AtomicInteger idNumber
    • x

      IntVar[] x
    • s

      SetVar[] s
    • ni

      int ni
    • ns

      int ns
    • offsetInt

      int offsetInt
    • offsetSet

      int offsetSet
    • firstConsistencyCheck

      boolean firstConsistencyCheck
  • Constructor Details

    • ChannelIntSet

      public ChannelIntSet(IntVar[] x, SetVar[] s, int offsetInt, int offsetSet)
      It constructs a Channel constraint.
      Parameters:
      x - array of integer variables.
      s - array of set variables.
      offsetInt - offset for integer variables array.
      offsetSet - offset for set variables array.
    • ChannelIntSet

      public ChannelIntSet(IntVar[] x, SetVar[] s)
      It constructs a Channel constraint.
      Parameters:
      x - array of integer variables.
      s - array of set variables.
  • 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.
    • 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.
    • allGround

      boolean allGround()
    • 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
    • toString

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