| /* |
| * Copyright (c) 2015, 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. |
| * |
| * 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. |
| */ |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.nio.file.StandardCopyOption; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| import java.util.jar.JarOutputStream; |
| import java.util.jar.Manifest; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| /** |
| * This class consists exclusively of static utility methods that are useful |
| * for creating and manipulating JAR files. |
| */ |
| |
| public final class JarUtils { |
| private JarUtils() { } |
| |
| /** |
| * Creates a JAR file. |
| * |
| * Equivalent to {@code jar cfm <jarfile> <manifest> -C <dir> file...} |
| * |
| * The input files are resolved against the given directory. Any input |
| * files that are directories are processed recursively. |
| */ |
| public static void createJarFile(Path jarfile, Manifest man, Path dir, Path... file) |
| throws IOException |
| { |
| // create the target directory |
| Path parent = jarfile.getParent(); |
| if (parent != null) |
| Files.createDirectories(parent); |
| |
| List<Path> entries = new ArrayList<>(); |
| for (Path entry : file) { |
| Files.find(dir.resolve(entry), Integer.MAX_VALUE, |
| (p, attrs) -> attrs.isRegularFile()) |
| .map(e -> dir.relativize(e)) |
| .forEach(entries::add); |
| } |
| |
| try (OutputStream out = Files.newOutputStream(jarfile); |
| JarOutputStream jos = new JarOutputStream(out)) |
| { |
| if (man != null) { |
| JarEntry je = new JarEntry(JarFile.MANIFEST_NAME); |
| jos.putNextEntry(je); |
| man.write(jos); |
| jos.closeEntry(); |
| } |
| |
| for (Path entry : entries) { |
| String name = toJarEntryName(entry); |
| jos.putNextEntry(new JarEntry(name)); |
| Files.copy(dir.resolve(entry), jos); |
| jos.closeEntry(); |
| } |
| } |
| } |
| |
| /** |
| * Creates a JAR file. |
| * |
| * Equivalent to {@code jar cf <jarfile> -C <dir> file...} |
| * |
| * The input files are resolved against the given directory. Any input |
| * files that are directories are processed recursively. |
| */ |
| public static void createJarFile(Path jarfile, Path dir, Path... file) |
| throws IOException |
| { |
| createJarFile(jarfile, null, dir, file); |
| } |
| |
| /** |
| * Creates a JAR file. |
| * |
| * Equivalent to {@code jar cf <jarfile> -C <dir> file...} |
| * |
| * The input files are resolved against the given directory. Any input |
| * files that are directories are processed recursively. |
| */ |
| public static void createJarFile(Path jarfile, Path dir, String... input) |
| throws IOException |
| { |
| Path[] paths = Stream.of(input).map(Paths::get).toArray(Path[]::new); |
| createJarFile(jarfile, dir, paths); |
| } |
| |
| /** |
| * Creates a JAR file from the contents of a directory. |
| * |
| * Equivalent to {@code jar cf <jarfile> -C <dir> .} |
| */ |
| public static void createJarFile(Path jarfile, Path dir) throws IOException { |
| createJarFile(jarfile, dir, Paths.get(".")); |
| } |
| |
| /** |
| * Update a JAR file. |
| * |
| * Equivalent to {@code jar uf <jarfile> -C <dir> file...} |
| * |
| * The input files are resolved against the given directory. Any input |
| * files that are directories are processed recursively. |
| */ |
| public static void updateJarFile(Path jarfile, Path dir, Path... file) |
| throws IOException |
| { |
| List<Path> entries = new ArrayList<>(); |
| for (Path entry : file) { |
| Files.find(dir.resolve(entry), Integer.MAX_VALUE, |
| (p, attrs) -> attrs.isRegularFile()) |
| .map(e -> dir.relativize(e)) |
| .forEach(entries::add); |
| } |
| |
| Set<String> names = entries.stream() |
| .map(JarUtils::toJarEntryName) |
| .collect(Collectors.toSet()); |
| |
| Path tmpfile = Files.createTempFile("jar", "jar"); |
| |
| try (OutputStream out = Files.newOutputStream(tmpfile); |
| JarOutputStream jos = new JarOutputStream(out)) |
| { |
| // copy existing entries from the original JAR file |
| try (JarFile jf = new JarFile(jarfile.toString())) { |
| Enumeration<JarEntry> jentries = jf.entries(); |
| while (jentries.hasMoreElements()) { |
| JarEntry jentry = jentries.nextElement(); |
| if (!names.contains(jentry.getName())) { |
| jos.putNextEntry(jentry); |
| jf.getInputStream(jentry).transferTo(jos); |
| } |
| } |
| } |
| |
| // add the new entries |
| for (Path entry : entries) { |
| String name = toJarEntryName(entry); |
| jos.putNextEntry(new JarEntry(name)); |
| Files.copy(dir.resolve(entry), jos); |
| } |
| } |
| |
| // replace the original JAR file |
| Files.move(tmpfile, jarfile, StandardCopyOption.REPLACE_EXISTING); |
| } |
| |
| /** |
| * Update a JAR file. |
| * |
| * Equivalent to {@code jar uf <jarfile> -C <dir> .} |
| */ |
| public static void updateJarFile(Path jarfile, Path dir) throws IOException { |
| updateJarFile(jarfile, dir, Paths.get(".")); |
| } |
| |
| |
| /** |
| * Map a file path to the equivalent name in a JAR file |
| */ |
| private static String toJarEntryName(Path file) { |
| Path normalized = file.normalize(); |
| return normalized.subpath(0, normalized.getNameCount()) // drop root |
| .toString() |
| .replace(File.separatorChar, '/'); |
| } |
| } |