| // *************************************************************************************************************************** |
| // * 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.juneau.cp; |
| |
| import static org.apache.juneau.common.internal.ArgUtils.*; |
| import static org.apache.juneau.common.internal.StringUtils.*; |
| import static org.apache.juneau.internal.ObjectUtils.*; |
| |
| import java.net.*; |
| import java.nio.file.*; |
| |
| import org.apache.juneau.internal.*; |
| |
| /** |
| * Identifies a directory located either on the classpath or file system. |
| * |
| * Used to encapsulate basic resolution and retrieval of files regardless of where they are located. |
| * |
| * <h5 class='section'>See Also:</h5><ul> |
| * </ul> |
| */ |
| public class LocalDir { |
| |
| private final Class<?> clazz; |
| private final String clazzPath; |
| private final Path path; |
| private final int hashCode; |
| |
| /** |
| * Constructor for classpath directory. |
| * |
| * @param clazz The class used to retrieve resources. |
| * @param clazzPath |
| * The subpath. Can be any of the following: |
| * <ul> |
| * <li><jk>null</jk> or an empty string - Package of the class. |
| * <li>Absolute path (starts with <js>'/'</js>) - Relative to root package. |
| * <li>Relative path (does not start with <js>'/'</js>) - Relative to class package. |
| * </ul> |
| */ |
| public LocalDir(Class<?> clazz, String clazzPath) { |
| this.clazz = assertArgNotNull("clazz", clazz); |
| this.clazzPath = "/".equals(clazzPath) ? "/" : nullIfEmpty(trimTrailingSlashes(clazzPath)); |
| this.path = null; |
| this.hashCode = HashCode.of(clazz, clazzPath); |
| } |
| |
| /** |
| * Constructor for file system directory. |
| * |
| * @param path Filesystem directory location. Must not be <jk>null</jk>. |
| */ |
| public LocalDir(Path path) { |
| this.clazz = null; |
| this.clazzPath = null; |
| this.path = assertArgNotNull("path", path); |
| this.hashCode = path.hashCode(); |
| } |
| |
| /** |
| * Resolves the specified path. |
| * |
| * @param path |
| * The path to the file to resolve. |
| * <br>Must be a non-null relative path. |
| * <br>Does no cleanup of the path (e.g. checking for security holes or malformed values). |
| * @return The file if it exists, or <jk>null</jk> if it does not. |
| */ |
| public LocalFile resolve(String path) { |
| if (clazz != null) { |
| String p = clazzPath == null ? path : ("/".equals(clazzPath) ? "" : clazzPath) + '/' + path; |
| if (isClasspathFile(clazz.getResource(p))) |
| return new LocalFile(clazz, p); |
| } else { |
| Path p = this.path.resolve(path); |
| if (Files.isReadable(p) && ! Files.isDirectory(p)) |
| return new LocalFile(p); |
| } |
| return null; |
| } |
| |
| /** |
| * Validates that the specified classpath resource exists and is a file. |
| * Note that the behavior of Class.getResource(path) is different when pointing to directories on the classpath. |
| * When packaged as a jar, calling Class.getResource(path) on a directory returns null. |
| * When unpackaged, calling Class.getResource(path) on a directory returns a URL starting with "file:". |
| * We perform a test to make the behavior the same regardless of whether we're packaged or not. |
| */ |
| private boolean isClasspathFile(URL url) { |
| try { |
| if (url == null) |
| return false; |
| URI uri = url.toURI(); |
| if (uri.toString().startsWith("file:")) |
| if (Files.isDirectory(Paths.get(uri))) |
| return false; |
| } catch (URISyntaxException e) { |
| e.printStackTrace(); // Untestable. |
| return false; |
| } |
| return true; |
| } |
| |
| @Override /* Object */ |
| public boolean equals(Object o) { |
| return o instanceof LocalDir && eq(this, (LocalDir)o, (x,y)->eq(x.clazz, y.clazz) && eq(x.clazzPath, y.clazzPath) && eq(x.path, y.path)); |
| } |
| |
| @Override /* Object */ |
| public int hashCode() { |
| return hashCode; |
| } |
| |
| @Override /* Object */ |
| public String toString() { |
| if (clazz == null) |
| return path.toString(); |
| return clazz.getName() + ":" + clazzPath; |
| } |
| } |