2601         new FileTreeWalker(options, visitor, maxDepth).walk(start);

  2601 

  2602         /**

  2603          * Create a FileTreeWalker to walk the file tree, invoking the visitor

  2604          * for each event.

  2605          */

  2606         try (FileTreeWalker walker = new FileTreeWalker(options, maxDepth)) {

  2607             FileTreeWalker.Event ev = walker.walk(start);

  2608             do {

  2609                 FileVisitResult result;

  2610                 switch (ev.type()) {

  2611                     case ENTRY :

  2612                         IOException ioe = ev.ioeException();

  2613                         if (ioe == null) {

  2614                             assert ev.attributes() != null;

  2615                             result = visitor.visitFile(ev.file(), ev.attributes());

  2616                         } else {

  2617                             result = visitor.visitFileFailed(ev.file(), ioe);

  2618                         }

  2619                         break;

  2620 

  2621                     case START_DIRECTORY :

  2622                         result = visitor.preVisitDirectory(ev.file(), ev.attributes());

  2623 

  2624                         // if SKIP_SIBLINGS and SKIP_SUBTREE is returned then

  2625                         // there shouldn't be any more events for the current

  2626                         // directory.

  2627                         if (result == FileVisitResult.SKIP_SUBTREE ||

  2628                             result == FileVisitResult.SKIP_SIBLINGS)

  2629                             walker.pop();

  2630                         break;

  2631 

  2632                     case END_DIRECTORY :

  2633                         result = visitor.postVisitDirectory(ev.file(), ev.ioeException());

  2634 

  2635                         // SKIP_SIBLINGS is a no-op for postVisitDirectory

  2636                         if (result == FileVisitResult.SKIP_SIBLINGS)

  2637                             result = FileVisitResult.CONTINUE;

  2638                         break;

  2639 

  2640                     default :

  2641                         throw new AssertionError("Should not get here");

  2642                 }

  2643 

  2644                 if (Objects.requireNonNull(result) != FileVisitResult.CONTINUE) {

  2645                     if (result == FileVisitResult.TERMINATE) {

  2646                         break;

  2647                     } else if (result == FileVisitResult.SKIP_SIBLINGS) {

  2648                         walker.skipRemainingSiblings();

  2649                     }

  2650                 }

  2651                 ev = walker.next();

  2652             } while (ev != null);

  2653         }

  2654