/*
    * 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 org.apache.commons.io.filefilter;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.FileVisitResult;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.attribute.BasicFileAttributes;
  
  import org.apache.commons.io.file.NoopPathVisitor;
  import org.apache.commons.io.file.PathUtils;
  import org.apache.commons.io.file.PathVisitor;
  
  /**
   * A file filter backed by a path visitor.
   *
   * @since 2.9.0
   */
  public class PathVisitorFileFilter extends AbstractFileFilter {
  
      private final PathVisitor pathVisitor;
  
      /**
       * Constructs a new instance that will forward calls to the given visitor.
       *
       * @param pathVisitor visit me.
       */
      public PathVisitorFileFilter(final PathVisitor pathVisitor) {
          this.pathVisitor = pathVisitor == null ? NoopPathVisitor.INSTANCE : pathVisitor;
      }
  
      @Override
      public boolean accept(final File file) {
          try {
              final Path path = file.toPath();
              return visitFile(path, file.exists() ? PathUtils.readBasicFileAttributes(path) : null) == FileVisitResult.CONTINUE;
          } catch (final IOException e) {
              return handle(e) == FileVisitResult.CONTINUE;
          }
      }
  
      @Override
      public boolean accept(final File dir, final String name) {
          try {
              final Path path = dir.toPath().resolve(name);
              return accept(path, PathUtils.readBasicFileAttributes(path)) == FileVisitResult.CONTINUE;
          } catch (final IOException e) {
              return handle(e) == FileVisitResult.CONTINUE;
          }
      }
  
      @Override
      public FileVisitResult accept(final Path path, final BasicFileAttributes attributes) {
          return get(() -> Files.isDirectory(path) ? pathVisitor.postVisitDirectory(path, null) : visitFile(path, attributes));
      }
  
      @Override
      public FileVisitResult visitFile(final Path path, final BasicFileAttributes attributes) throws IOException {
          return pathVisitor.visitFile(path, attributes);
      }
  
  }