/*

 * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 * Support routines to allow running `javac' or `jar' within the same JVM.

 */

import java.io.*;

import java.net.*;

import java.lang.reflect.*;

class SameJVM {

    private static ClassLoader toolsClassLoader() {

        File javaHome   = new File(System.getProperty("java.home"));

        File classesDir = new File(javaHome, "classes");

        File libDir     = new File(javaHome.getParentFile(), "lib");

        File toolsJar   = new File(libDir, "tools.jar");

        try {

            return new URLClassLoader(

                new URL[] {classesDir.toURL(), toolsJar.toURL()});

        } catch (MalformedURLException e) { throw new AssertionError(e); }

    }

    private static final ClassLoader cl = toolsClassLoader();

    static void javac(String... args) throws Exception {

        Class c = Class.forName("com.sun.tools.javac.Main", true, cl);

        int status = (Integer)

            c.getMethod("compile", new Class[] {String[].class})

            .invoke(c.newInstance(), new Object[] {args});

        if (status != 0)

            throw new Exception("javac failed: status=" + status);

    }

    static void jar(String... args) throws Exception {

        Class c = Class.forName("sun.tools.jar.Main", true, cl);

        Object instance = c.getConstructor(

            new Class[] {PrintStream.class, PrintStream.class, String.class})

            .newInstance(System.out, System.err, "jar");

        boolean result = (Boolean)

            c.getMethod("run", new Class[] {String[].class})

            .invoke(instance, new Object[] {args});

        if (! result)

            throw new Exception("jar failed");

    }

}