1 /*

     2  * Copyright (c) 2011, 2012, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package apple.launcher;

    27 

    28 import java.io.*;

    29 import java.lang.reflect.*;

    30 import java.text.MessageFormat;

    31 import java.util.*;

    32 import java.util.jar.*;

    33 

    34 import javax.swing.*;

    35 

    36 class JavaAppLauncher implements Runnable {

    37     static {

    38         java.security.AccessController.doPrivileged(

    39             new java.security.PrivilegedAction<Void>() {

    40                 public Void run() {

    41                     System.loadLibrary("osx");

    42                     return null;

    43                 }

    44             });

    45     }

    46 

    47     private static native <T> T nativeConvertAndRelease(final long ptr);

    48     private static native void nativeInvokeNonPublic(Class<? extends Method> cls, Method m, String[] args);

    49 

    50     // entry point from native

    51     static void launch(final long javaDictionaryPtr, final boolean verbose) {

    52         final Map<String, ?> javaDictionary = nativeConvertAndRelease(javaDictionaryPtr);

    53         (new JavaAppLauncher(javaDictionary, verbose)).run();

    54     }

    55 

    56         // these are the values for the enumeration JavaFailureMode

    57         static final String kJavaFailureMainClassNotSpecified = "MainClassNotSpecified";

    58         static final String kJavaFailureMainClassNotFound = "CannotLoadMainClass";

    59         static final String kJavaFailureMainClassHasNoMain = "NoMainMethod";

    60         static final String kJavaFailureMainClassMainNotStatic = "MainNotStatic";

    61         static final String kJavaFailureMainThrewException = "MainThrewException";

    62         static final String kJavaFailureMainInitializerException = "MainInitializerException";

    63 

    64         final boolean verbose; // Normally set by environment variable JAVA_LAUNCHER_VERBOSE.

    65         final Map<String, ?> javaDictionary;

    66 

    67         JavaAppLauncher(final Map<String, ?> javaDictionary, final boolean verbose) {

    68                 this.verbose = verbose;

    69                 this.javaDictionary = javaDictionary;

    70         }

    71 

    72         @Override

    73         public void run() {

    74                 final Method m = loadMainMethod(getMainMethod());

    75                 final String methodName = m.getDeclaringClass().getName() + ".main(String[])";

    76                 try {

    77                         log("Calling " + methodName + " method");

    78                         m.invoke(null, new Object[] { getArguments() });

    79                         log(methodName + " has returned");

    80                 } catch (final IllegalAccessException x) {

    81                         try {

    82                                 nativeInvokeNonPublic(m.getClass(), m, getArguments());

    83                         } catch (final Throwable excpt) {

    84                                 logError(methodName + " threw an exception:");

    85                                 if ((excpt instanceof UnsatisfiedLinkError) && excpt.getMessage().equals("nativeInvokeNonPublic")) {

    86                                         showFailureAlertAndKill(kJavaFailureMainThrewException, "nativeInvokeNonPublic not registered");

    87                                 } else {

    88                                         excpt.printStackTrace();

    89                                         showFailureAlertAndKill(kJavaFailureMainThrewException, excpt.toString());

    90                                 }

    91                         }

    92                 } catch (final InvocationTargetException invokeExcpt) {

    93                         logError(methodName + " threw an exception:");

    94                         invokeExcpt.getTargetException().printStackTrace();

    95                         showFailureAlertAndKill(kJavaFailureMainThrewException, invokeExcpt.getTargetException().toString());

    96                 }

    97         }

    98 

    99         Method loadMainMethod(final String mainClassName) {

   100                 try {

   101                         final Class<?> mainClass = Class.forName(mainClassName, true, sun.misc.Launcher.getLauncher().getClassLoader());

   102                         final Method mainMethod = mainClass.getDeclaredMethod("main", new Class[] { String[].class });

   103                         if ((mainMethod.getModifiers() & Modifier.STATIC) == 0) {

   104                                 logError("The main(String[]) method of class " + mainClassName + " is not static!");

   105                                 showFailureAlertAndKill(kJavaFailureMainClassMainNotStatic, mainClassName);

   106                         }

   107                         return mainMethod;

   108                 } catch (final ExceptionInInitializerError x) {

   109                         logError("The main class \"" + mainClassName + "\" had a static initializer throw an exception.");

   110                         x.getException().printStackTrace();

   111                         showFailureAlertAndKill(kJavaFailureMainInitializerException, x.getException().toString());

   112                 } catch (final ClassNotFoundException x) {

   113                         logError("The main class \"" + mainClassName + "\" could not be found.");

   114                         showFailureAlertAndKill(kJavaFailureMainClassNotFound, mainClassName);

   115                 } catch (final NoSuchMethodException x) {

   116                         logError("The main class \"" + mainClassName + "\" has no static main(String[]) method.");

   117                         showFailureAlertAndKill(kJavaFailureMainClassHasNoMain, mainClassName);

   118                 } catch (final NullPointerException x) {

   119                         logError("No main class specified");

   120                         showFailureAlertAndKill(kJavaFailureMainClassNotSpecified, null);

   121                 }

   122 

   123                 return null;

   124         }

   125 

   126         // get main class name from 'Jar' key, or 'MainClass' key

   127         String getMainMethod() {

   128                 final Object javaJar = javaDictionary.get("Jar");

   129                 if (javaJar != null) {

   130                         if (!(javaJar instanceof String)) {

   131                                 logError("'Jar' key in 'Java' sub-dictionary of Info.plist requires a string value");

   132                                 return null;

   133                         }

   134 

   135                         final String jarPath = (String)javaJar;

   136                         if (jarPath.length() == 0) {

   137                                 log("'Jar' key of sub-dictionary 'Java' of Info.plist key is empty");

   138                         } else {

   139                                 // extract main class from manifest of this jar

   140                                 final String main = getMainFromManifest(jarPath);

   141                                 if (main == null) {

   142                                         logError("jar file '" + jarPath + "' does not have Main-Class: attribute in its manifest");

   143                                         return null;

   144                                 }

   145 

   146                                 log("Main class " + main + " found in jar manifest");

   147                                 return main;

   148                         }

   149                 }

   150 

   151                 final Object javaMain = javaDictionary.get("MainClass");

   152                 if (!(javaMain instanceof String)) {

   153                         logError("'MainClass' key in 'Java' sub-dictionary of Info.plist requires a string value");

   154                         return null;

   155                 }

   156 

   157                 final String main = (String)javaMain;

   158                 if (main.length() == 0) {

   159                         log("'MainClass' key of sub-dictionary 'Java' of Info.plist key is empty");

   160                         return null;

   161                 }

   162 

   163                 log("Main class " + (String)javaMain + " found via 'MainClass' key of sub-dictionary 'Java' of Info.plist key");

   164                 return (String)javaMain;

   165         }

   166 

   167         // get arguments for main(String[]) out of Info.plist and command line

   168         String[] getArguments() {

   169                 // check for 'Arguments' key, which contains the main() args if not defined in Info.plist

   170                 final Object javaArguments = javaDictionary.get("Arguments");

   171                 if (javaArguments == null) {

   172                         // no arguments

   173                         log("No arguments for main(String[]) specified");

   174                         return new String[0];

   175                 }

   176 

   177                 if (javaArguments instanceof List) {

   178                         final List<?> args = (List<?>)javaArguments;

   179                         final int count = args.size();

   180                         log("Arguments to main(String[" + count + "]):");

   181 

   182                         final String[] result = new String[count];

   183                         for (int i = 0; i < count; ++i) {

   184                                 final Object element = args.get(i);

   185                                 if (element instanceof String) {

   186                                         result[i] = (String)element;

   187                                 } else {

   188                                         logError("Found non-string in array");

   189                                 }

   190                                 log("   arg[" + i + "]=" + result[i]);

   191                         }

   192                         return result;

   193                 }

   194 

   195                 logError("'Arguments' key in 'Java' sub-dictionary of Info.plist requires a string value or an array of strings");

   196                 return new String[0];

   197         }

   198 

   199         // returns name of main class, or null

   200         String getMainFromManifest(final String jarpath) {

   201                 JarFile jar = null;

   202                 try {

   203                         jar = new JarFile(jarpath);

   204                         final Manifest man = jar.getManifest();

   205                         final Attributes attr = man.getMainAttributes();

   206                         return attr.getValue("Main-Class");

   207                 } catch (final IOException x) {

   208                         // shrug

   209                 } finally {

   210                         if (jar != null) {

   211                                 try {

   212                                         jar.close();

   213                                 } catch (final IOException x) { }

   214                         }

   215                 }

   216                 return null;

   217         }

   218 

   219         void log(final String s) {

   220                 if (!verbose) return;

   221                 System.out.println("[LaunchRunner] " + s);

   222         }

   223 

   224         static void logError(final String s) {

   225                 System.err.println("[LaunchRunner Error] " + s);

   226         }

   227 

   228         // This kills the app and does not return!

   229         static void showFailureAlertAndKill(final String msg, String arg) {

   230                 if (arg == null) arg = "<<null>>";

   231                 JOptionPane.showMessageDialog(null, getMessage(msg, arg), "", JOptionPane.ERROR_MESSAGE);

   232                 System.exit(-1);

   233         }

   234 

   235         static String getMessage(final String msgKey, final Object ... args) {

   236             final String msg = ResourceBundle.getBundle("appLauncherErrors").getString(msgKey);

   237             return MessageFormat.format(msg, args);

   238         }

   239 }