Module org.apache.wicket.util
Package org.apache.wicket.util.visit

Class Visits

java.lang.Object
org.apache.wicket.util.visit.Visits
public class Visits extends Object
Utility class that contains visitor/traversal related code

  • Method Details

    • visit

      public static <S, R> R visit(Iterable<? super S> container, IVisitor<S,R> visitor)
      Visits container and its children pre-order (parent first). Children are determined by calling Iterable.iterator().
      Type Parameters:
      S - the type of object that will be visited, notice that container is not declared as Iterable<S> because it may return a generalization of S
      R - the type of object that should be returned from the visitor, use Void if no return value is needed
      Parameters:
      container - object whose children will be visited
      visitor - the visitor
      Returns:
      return value from the visitor or null if none

    • visit

      public static <S, R> R visit(Iterable<? super S> container, IVisitor<S,R> visitor, IVisitFilter filter)
      Visits container and its children pre-order (parent first). Children are determined by calling Iterable.iterator().
      Type Parameters:
      S - the type of object that will be visited, notice that container is not declared as Iterable<S> because it may return a generalization of S
      R - the type of object that should be returned from the visitor, use Void if no return value is needed
      Parameters:
      container - object whose children will be visited
      visitor - the visitor
      filter - filter used to limit the types of objects that will be visited
      Returns:
      return value from the visitor or null if none

    • visitChildren

      public static <S, R> R visitChildren(Iterable<? super S> container, IVisitor<S,R> visitor, IVisitFilter filter)
      Visits children of the specified Iterable pre-order (parent first). Children are determined by calling Iterable.iterator().
      Type Parameters:
      S - the type of object that will be visited, notice that container is not declared as Iterable<S> because it may return a generalization of S
      R - the type of object that should be returned from the visitor, use Void if no return value is needed
      Parameters:
      container - object whose children will be visited
      visitor - the visitor
      filter - filter used to limit the types of objects that will be visited
      Returns:
      return value from the visitor or null if none

    • visitChildren

      public static <S, R> R visitChildren(Iterable<? super S> container, IVisitor<S,R> visitor)
      Visits children of the specified Iterable pre-order (parent first). Children are determined by calling Iterable.iterator().
      Type Parameters:
      S - the type of object that will be visited, notice that container is not declared as Iterable<S> because it may return a generalization of S
      R - the type of object that should be returned from the visitor, use Void if no return value is needed
      Parameters:
      container - object whose children will be visited
      visitor - the visitor
      Returns:
      return value from the visitor or null if none

    • visitPostOrder

      public static <S, R> R visitPostOrder(S root, IVisitor<S,R> visitor)
      Visits the specified object and any of its children using a post-order (child first) traversal. Children are determined by calling Iterable.iterator() if the object implements Iterable.
      Type Parameters:
      S - the type of object that will be visited, notice that container is not declared as Iterable<S> because it may return a generalization of S
      R - the type of object that should be returned from the visitor, use Void if no return value is needed
      Parameters:
      root - root object that will be visited
      visitor - the visitor
      Returns:
      return value from the visitor or null if none

    • visitPostOrder

      public static <S, R> R visitPostOrder(Object root, IVisitor<S,R> visitor, IVisitFilter filter)
      Visits the specified object and any of its children using a post-order (child first) traversal. Children are determined by calling Iterable.iterator() if the object implements Iterable.
      Type Parameters:
      S - the type of object that will be visited, notice that container is not declared as Iterable<S> because it may return a generalization of S
      R - the type of object that should be returned from the visitor, use Void if no return value is needed
      Parameters:
      root - root object that will be visited
      visitor - the visitor
      filter - filter used to limit the types of objects that will be visited
      Returns:
      return value from the visitor or null if none