1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.InputStream;
  25 import java.nio.file.Files;
  26 import java.nio.file.Path;
  27 import java.nio.file.Paths;
  28 import java.nio.file.StandardCopyOption;
  29 
  30 /**
  31  * Dump a class file for a class on the class path in the current directory
  32  */
  33 public class ClassFileInstaller {
  34     /**
  35      * @param args The names of the classes to dump
  36      * @throws Exception
  37      */
  38     public static void main(String... args) throws Exception {
  39         for (String arg : args) {
  40             ClassLoader cl = ClassFileInstaller.class.getClassLoader();
  41 
  42             // Convert dotted class name to a path to a class file
  43             String pathName = arg.replace('.', '/').concat(".class");
  44             InputStream is = cl.getResourceAsStream(pathName);
  45 
  46             // Create the class file's package directory
  47             Path p = Paths.get(pathName);
  48             Files.createDirectories(p.getParent());
  49             // Create the class file
  50             Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING);
  51         }
  52     }
  53 }