| /* gnu.java.lang.MainThread |
| Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
| Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.lang; |
| |
| import java.io.File; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarFile; |
| |
| /** |
| * MainThread is a Thread which uses the main() method of some class. |
| * |
| * @author John Keiser |
| * @author Tom Tromey (tromey@redhat.com) |
| */ |
| final class MainThread extends Thread |
| { |
| // If the user links statically then we need to ensure that these |
| // classes are linked in. Otherwise bootstrapping fails. These |
| // classes are only referred to via Class.forName(), so we add an |
| // explicit mention of them here. |
| static final Class Kcert = java.security.cert.Certificate.class; |
| static final Class Kfile = gnu.java.net.protocol.file.Handler.class; |
| static final Class Khttp = gnu.java.net.protocol.http.Handler.class; |
| static final Class Kjar = gnu.java.net.protocol.jar.Handler.class; |
| static final Class Klocale = gnu.java.locale.LocaleInformation.class; |
| static final Class Kcalendar = gnu.java.locale.Calendar.class; |
| |
| // Private data. |
| private Class klass; |
| private String klass_name; |
| private String[] args; |
| private boolean is_jar; |
| |
| public MainThread(Class k, String[] args) |
| { |
| super(null, null, "main"); |
| klass = k; |
| this.args = args; |
| } |
| |
| public MainThread(String classname, String[] args, boolean is_jar) |
| { |
| super (null, null, "main"); |
| klass_name = classname; |
| this.args = args; |
| this.is_jar = is_jar; |
| } |
| |
| public void run() |
| { |
| if (is_jar) |
| klass_name = getMain(klass_name); |
| |
| if (klass == null) |
| { |
| try |
| { |
| ClassLoader cl = ClassLoader.getSystemClassLoader(); |
| // Permit main class name to be specified in file-system format. |
| klass_name = klass_name.replace(File.separatorChar, '.'); |
| klass = cl.loadClass(klass_name); |
| } |
| catch (ClassNotFoundException x) |
| { |
| NoClassDefFoundError ncdfe = new NoClassDefFoundError(klass_name); |
| ncdfe.initCause(x); |
| throw ncdfe; |
| } |
| } |
| |
| call_main(); |
| } |
| |
| private String getMain(String name) |
| { |
| String mainName = null; |
| try |
| { |
| JarFile j = new JarFile(name); |
| Attributes a = j.getManifest().getMainAttributes(); |
| mainName = a.getValue(Attributes.Name.MAIN_CLASS); |
| } |
| catch (Exception e) |
| { |
| // Ignore. |
| } |
| |
| if (mainName == null) |
| { |
| System.err.println("Failed to load Main-Class manifest attribute from " |
| + name); |
| System.exit(1); |
| } |
| return mainName; |
| } |
| |
| // Note: this function name is known to the stack tracing code. |
| // You shouldn't change this without also updating stacktrace.cc. |
| private native void call_main(); |
| } |