| /** |
| * Licensed 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. See accompanying LICENSE file. |
| */ |
| package org.apache.hadoop.util; |
| |
| import com.google.common.base.Preconditions; |
| |
| import java.io.BufferedOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.net.URLDecoder; |
| import java.text.MessageFormat; |
| import java.util.Enumeration; |
| import java.util.jar.JarFile; |
| import java.util.jar.JarOutputStream; |
| import java.util.jar.Manifest; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipOutputStream; |
| |
| /** |
| * Finds the Jar for a class. If the class is in a directory in the |
| * classpath, it creates a Jar on the fly with the contents of the directory |
| * and returns the path to that Jar. If a Jar is created, it is created in |
| * the system temporary directory. |
| */ |
| public class JarFinder { |
| |
| private static void copyToZipStream(InputStream is, ZipEntry entry, |
| ZipOutputStream zos) throws IOException { |
| zos.putNextEntry(entry); |
| byte[] arr = new byte[4096]; |
| int read = is.read(arr); |
| while (read > -1) { |
| zos.write(arr, 0, read); |
| read = is.read(arr); |
| } |
| is.close(); |
| zos.closeEntry(); |
| } |
| |
| public static void jarDir(File dir, String relativePath, ZipOutputStream zos) |
| throws IOException { |
| Preconditions.checkNotNull(relativePath, "relativePath"); |
| Preconditions.checkNotNull(zos, "zos"); |
| |
| // by JAR spec, if there is a manifest, it must be the first entry in the |
| // ZIP. |
| File manifestFile = new File(dir, JarFile.MANIFEST_NAME); |
| ZipEntry manifestEntry = new ZipEntry(JarFile.MANIFEST_NAME); |
| if (!manifestFile.exists()) { |
| zos.putNextEntry(manifestEntry); |
| new Manifest().write(new BufferedOutputStream(zos)); |
| zos.closeEntry(); |
| } else { |
| InputStream is = new FileInputStream(manifestFile); |
| copyToZipStream(is, manifestEntry, zos); |
| } |
| zos.closeEntry(); |
| zipDir(dir, relativePath, zos, true); |
| zos.close(); |
| } |
| |
| private static void zipDir(File dir, String relativePath, ZipOutputStream zos, |
| boolean start) throws IOException { |
| String[] dirList = dir.list(); |
| for (String aDirList : dirList) { |
| File f = new File(dir, aDirList); |
| if (!f.isHidden()) { |
| if (f.isDirectory()) { |
| if (!start) { |
| ZipEntry dirEntry = new ZipEntry(relativePath + f.getName() + "/"); |
| zos.putNextEntry(dirEntry); |
| zos.closeEntry(); |
| } |
| String filePath = f.getPath(); |
| File file = new File(filePath); |
| zipDir(file, relativePath + f.getName() + "/", zos, false); |
| } |
| else { |
| String path = relativePath + f.getName(); |
| if (!path.equals(JarFile.MANIFEST_NAME)) { |
| ZipEntry anEntry = new ZipEntry(path); |
| InputStream is = new FileInputStream(f); |
| copyToZipStream(is, anEntry, zos); |
| } |
| } |
| } |
| } |
| } |
| |
| private static void createJar(File dir, File jarFile) throws IOException { |
| Preconditions.checkNotNull(dir, "dir"); |
| Preconditions.checkNotNull(jarFile, "jarFile"); |
| File jarDir = jarFile.getParentFile(); |
| if (!jarDir.exists()) { |
| if (!jarDir.mkdirs()) { |
| throw new IOException(MessageFormat.format("could not create dir [{0}]", |
| jarDir)); |
| } |
| } |
| JarOutputStream zos = new JarOutputStream(new FileOutputStream(jarFile)); |
| jarDir(dir, "", zos); |
| } |
| |
| /** |
| * Returns the full path to the Jar containing the class. It always return a |
| * JAR. |
| * |
| * @param klass class. |
| * |
| * @return path to the Jar containing the class. |
| */ |
| public static String getJar(Class klass) { |
| Preconditions.checkNotNull(klass, "klass"); |
| ClassLoader loader = klass.getClassLoader(); |
| if (loader != null) { |
| String class_file = klass.getName().replaceAll("\\.", "/") + ".class"; |
| try { |
| for (Enumeration itr = loader.getResources(class_file); |
| itr.hasMoreElements(); ) { |
| URL url = (URL) itr.nextElement(); |
| String path = url.getPath(); |
| if (path.startsWith("file:")) { |
| path = path.substring("file:".length()); |
| } |
| path = URLDecoder.decode(path, "UTF-8"); |
| if ("jar".equals(url.getProtocol())) { |
| path = URLDecoder.decode(path, "UTF-8"); |
| return path.replaceAll("!.*$", ""); |
| } |
| else if ("file".equals(url.getProtocol())) { |
| String klassName = klass.getName(); |
| klassName = klassName.replace(".", "/") + ".class"; |
| path = path.substring(0, path.length() - klassName.length()); |
| File baseDir = new File(path); |
| File testDir = new File(System.getProperty("test.build.dir", "target/test-dir")); |
| testDir = testDir.getAbsoluteFile(); |
| if (!testDir.exists()) { |
| testDir.mkdirs(); |
| } |
| File tempJar = File.createTempFile("hadoop-", "", testDir); |
| tempJar = new File(tempJar.getAbsolutePath() + ".jar"); |
| createJar(baseDir, tempJar); |
| return tempJar.getAbsolutePath(); |
| } |
| } |
| } |
| catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| return null; |
| } |
| } |