| /* |
| * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.javac.file; |
| |
| import java.io.IOException; |
| import java.nio.file.FileSystems; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.spi.FileSystemProvider; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.StringTokenizer; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| |
| import com.sun.tools.javac.util.Context; |
| |
| /** |
| * Get meta-info about files. Default direct (non-caching) implementation. |
| * @see CacheFSInfo |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class FSInfo { |
| |
| /** Get the FSInfo instance for this context. |
| * @param context the context |
| * @return the Paths instance for this context |
| */ |
| public static FSInfo instance(Context context) { |
| FSInfo instance = context.get(FSInfo.class); |
| if (instance == null) |
| instance = new FSInfo(); |
| return instance; |
| } |
| |
| protected FSInfo() { |
| } |
| |
| protected FSInfo(Context context) { |
| context.put(FSInfo.class, this); |
| } |
| |
| public Path getCanonicalFile(Path file) { |
| try { |
| return file.toRealPath(); |
| } catch (IOException e) { |
| return file.toAbsolutePath().normalize(); |
| } |
| } |
| |
| public boolean exists(Path file) { |
| return Files.exists(file); |
| } |
| |
| public boolean isDirectory(Path file) { |
| return Files.isDirectory(file); |
| } |
| |
| public boolean isFile(Path file) { |
| return Files.isRegularFile(file); |
| } |
| |
| public List<Path> getJarClassPath(Path file) throws IOException { |
| Path parent = file.getParent(); |
| try (JarFile jarFile = new JarFile(file.toFile())) { |
| Manifest man = jarFile.getManifest(); |
| if (man == null) |
| return Collections.emptyList(); |
| |
| Attributes attr = man.getMainAttributes(); |
| if (attr == null) |
| return Collections.emptyList(); |
| |
| String path = attr.getValue(Attributes.Name.CLASS_PATH); |
| if (path == null) |
| return Collections.emptyList(); |
| |
| List<Path> list = new ArrayList<>(); |
| |
| for (StringTokenizer st = new StringTokenizer(path); |
| st.hasMoreTokens(); ) { |
| String elt = st.nextToken(); |
| Path f = FileSystems.getDefault().getPath(elt); |
| if (!f.isAbsolute() && parent != null) |
| f = parent.resolve(f).toAbsolutePath(); |
| list.add(f); |
| } |
| |
| return list; |
| } |
| } |
| |
| private FileSystemProvider jarFSProvider; |
| |
| public synchronized FileSystemProvider getJarFSProvider() { |
| if (jarFSProvider != null) { |
| return jarFSProvider; |
| } |
| for (FileSystemProvider provider: FileSystemProvider.installedProviders()) { |
| if (provider.getScheme().equals("jar")) { |
| return (jarFSProvider = provider); |
| } |
| } |
| return null; |
| } |
| |
| } |