| /* |
| * 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 |
| * |
| * https://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.tools.ant.types.resources.comparators; |
| |
| import java.io.File; |
| import java.util.Comparator; |
| import java.util.Objects; |
| import java.util.function.Function; |
| |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.types.resources.FileProvider; |
| import org.apache.tools.ant.util.FileUtils; |
| |
| /** |
| * Compares filesystem Resources. |
| * @since Ant 1.7 |
| */ |
| public class FileSystem extends ResourceComparator { |
| private static final FileUtils FILE_UTILS = FileUtils.getFileUtils(); |
| |
| /** |
| * Compare two Resources. |
| * @param foo the first Resource. |
| * @param bar the second Resource. |
| * @return a negative integer, zero, or a positive integer as the first |
| * argument is less than, equal to, or greater than the second. |
| * @throws ClassCastException if either resource is not capable of |
| * exposing a {@link FileProvider} |
| */ |
| protected int resourceCompare(Resource foo, Resource bar) { |
| return compare(file(foo), file(bar)); |
| } |
| |
| private File file(Resource r) { |
| return r.asOptional(FileProvider.class) |
| .orElseThrow(() -> new ClassCastException( |
| r.getClass() + " doesn't provide files")) |
| .getFile(); |
| } |
| |
| private int compare(File f1, File f2) { |
| if (Objects.equals(f1, f2)) { |
| return 0; |
| } |
| if (FILE_UTILS.isLeadingPath(f1, f2)) { |
| return -1; |
| } |
| if (FILE_UTILS.isLeadingPath(f2, f1)) { |
| return 1; |
| } |
| return Comparator |
| .comparing(((Function<File, String>) File::getAbsolutePath) |
| .andThen(FILE_UTILS::normalize)) |
| .compare(f1, f2); |
| } |
| } |