content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alipay.application.service.rule.utils;
  
  
  import java.io.IOException;
  import java.nio.file.*;
  import java.nio.file.attribute.BasicFileAttributes;
  import java.util.ArrayList;
  import java.util.List;
  
  public class DirectoryWalkerUtil {
      
      public static List<Path> findDeepestDirectories(Path startPath) throws IOException {
          List<Path> deepestDirs = new ArrayList<>();
          Files.walkFileTree(startPath, new SimpleFileVisitor<>() {
              @Override
              public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                  boolean hasSubDir = false;
                  try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
                      for (Path entry : stream) {
                          if (Files.isDirectory(entry)) {
                              hasSubDir = true;
                              break;
                          }
                      }
                  }
                  if (!hasSubDir) {
                      deepestDirs.add(dir);
                      return FileVisitResult.SKIP_SUBTREE;
                  }
                  return FileVisitResult.CONTINUE;
              }
          });
          return deepestDirs;
      }
  }
  