Package it.tidalwave.role

Interface Composite.Visitor<T,R>

Type Parameters:
T - the type of the composite
R - the type of the result
Enclosing interface:
Composite<T,F extends Finder<? extends T>>
public static interface Composite.Visitor<T,R>
A visitor that can travel through the Composite items.

  • Method Summary

    Modifier and Type
    Method
    Description
    default Optional<R>
    getValue()
    Returns the value of this visitor.
    default void
    postVisit(T object)
    Visits an object.
    default void
    preVisit(T object)
    Visits an object.
    default void
    visit(T object)
    Visits an object.

  • Method Details

    • preVisit

      default void preVisit(@Nonnull T object)
      Visits an object. This method is called before visiting children (pre-order).
      Parameters:
      object - the visited object

    • visit

      default void visit(@Nonnull T object)
      Visits an object. This method is actually called just after preVisit(Object), it makes sense to implement it when you don't need to distinguish between pre-order and post-order traversal.
      Parameters:
      object - the visited object

    • postVisit

      default void postVisit(@Nonnull T object)
      Visits an object. This method is called after visiting children (post-order).
      Parameters:
      object - the visited object

    • getValue

      @Nonnull default Optional<R> getValue()
      Returns the value of this visitor..
      Returns:
      the value of this visitor