langtools/test/tools/javac/Paths/SameJVM.java
changeset 10 06bc494ca11e
child 5520 86e4b9a9da40
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0:fd16c54261b3 10:06bc494ca11e
       
     1 /*
       
     2  * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
       
    20  * CA 95054 USA or visit www.sun.com if you need additional information or
       
    21  * have any questions.
       
    22  */
       
    23 
       
    24 /*
       
    25  * Support routines to allow running `javac' or `jar' within the same JVM.
       
    26  */
       
    27 
       
    28 import java.io.*;
       
    29 import java.net.*;
       
    30 import java.lang.reflect.*;
       
    31 
       
    32 class SameJVM {
       
    33 
       
    34     private static ClassLoader toolsClassLoader() {
       
    35         File javaHome   = new File(System.getProperty("java.home"));
       
    36         File classesDir = new File(javaHome, "classes");
       
    37         File libDir     = new File(javaHome.getParentFile(), "lib");
       
    38         File toolsJar   = new File(libDir, "tools.jar");
       
    39         try {
       
    40             return new URLClassLoader(
       
    41                 new URL[] {classesDir.toURL(), toolsJar.toURL()});
       
    42         } catch (MalformedURLException e) { throw new AssertionError(e); }
       
    43     }
       
    44     private static final ClassLoader cl = toolsClassLoader();
       
    45 
       
    46     static void javac(String... args) throws Exception {
       
    47         Class c = Class.forName("com.sun.tools.javac.Main", true, cl);
       
    48         int status = (Integer)
       
    49             c.getMethod("compile", new Class[] {String[].class})
       
    50             .invoke(c.newInstance(), new Object[] {args});
       
    51         if (status != 0)
       
    52             throw new Exception("javac failed: status=" + status);
       
    53     }
       
    54 
       
    55     static void jar(String... args) throws Exception {
       
    56         Class c = Class.forName("sun.tools.jar.Main", true, cl);
       
    57         Object instance = c.getConstructor(
       
    58             new Class[] {PrintStream.class, PrintStream.class, String.class})
       
    59             .newInstance(System.out, System.err, "jar");
       
    60         boolean result = (Boolean)
       
    61             c.getMethod("run", new Class[] {String[].class})
       
    62             .invoke(instance, new Object[] {args});
       
    63         if (! result)
       
    64             throw new Exception("jar failed");
       
    65     }
       
    66 }