duke@1: /*
ohair@554:  * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
duke@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1:  *
duke@1:  * This code is free software; you can redistribute it and/or modify it
duke@1:  * under the terms of the GNU General Public License version 2 only, as
duke@1:  * published by the Free Software Foundation.
duke@1:  *
duke@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@1:  * version 2 for more details (a copy is included in the LICENSE file that
duke@1:  * accompanied this code).
duke@1:  *
duke@1:  * You should have received a copy of the GNU General Public License version
duke@1:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1:  *
ohair@554:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554:  * or visit www.oracle.com if you need additional information or have any
ohair@554:  * questions.
duke@1:  */
duke@1: 
duke@1: /*
duke@1:  * Support routines to allow running `javac' or `jar' within the same JVM.
duke@1:  */
duke@1: 
duke@1: import java.io.*;
duke@1: import java.net.*;
duke@1: import java.lang.reflect.*;
duke@1: 
duke@1: class SameJVM {
duke@1: 
duke@1:     private static ClassLoader toolsClassLoader() {
duke@1:         File javaHome   = new File(System.getProperty("java.home"));
duke@1:         File classesDir = new File(javaHome, "classes");
duke@1:         File libDir     = new File(javaHome.getParentFile(), "lib");
duke@1:         File toolsJar   = new File(libDir, "tools.jar");
duke@1:         try {
duke@1:             return new URLClassLoader(
duke@1:                 new URL[] {classesDir.toURL(), toolsJar.toURL()});
duke@1:         } catch (MalformedURLException e) { throw new AssertionError(e); }
duke@1:     }
duke@1:     private static final ClassLoader cl = toolsClassLoader();
duke@1: 
duke@1:     static void javac(String... args) throws Exception {
duke@1:         Class c = Class.forName("com.sun.tools.javac.Main", true, cl);
duke@1:         int status = (Integer)
duke@1:             c.getMethod("compile", new Class[] {String[].class})
duke@1:             .invoke(c.newInstance(), new Object[] {args});
duke@1:         if (status != 0)
duke@1:             throw new Exception("javac failed: status=" + status);
duke@1:     }
duke@1: 
duke@1:     static void jar(String... args) throws Exception {
duke@1:         Class c = Class.forName("sun.tools.jar.Main", true, cl);
duke@1:         Object instance = c.getConstructor(
duke@1:             new Class[] {PrintStream.class, PrintStream.class, String.class})
duke@1:             .newInstance(System.out, System.err, "jar");
duke@1:         boolean result = (Boolean)
duke@1:             c.getMethod("run", new Class[] {String[].class})
duke@1:             .invoke(instance, new Object[] {args});
duke@1:         if (! result)
duke@1:             throw new Exception("jar failed");
duke@1:     }
duke@1: }