/*
* Copyright (c) 2011, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package apple.launcher;
import java.io.*;
import java.lang.reflect.*;
import java.security.PrivilegedAction;
import java.text.MessageFormat;
import java.util.*;
import java.util.jar.*;
import javax.swing.*;
class JavaAppLauncher implements Runnable {
static {
java.security.AccessController.doPrivileged((PrivilegedAction<?>)new sun.security.action.LoadLibraryAction("osx"));
}
private static native <T> T nativeConvertAndRelease(final long ptr);
private static native void nativeInvokeNonPublic(Class<? extends Method> cls, Method m, String[] args);
// entry point from native
static void launch(final long javaDictionaryPtr, final boolean verbose) {
final Map<String, ?> javaDictionary = nativeConvertAndRelease(javaDictionaryPtr);
(new JavaAppLauncher(javaDictionary, verbose)).run();
}
// these are the values for the enumeration JavaFailureMode
static final String kJavaFailureMainClassNotSpecified = "MainClassNotSpecified";
static final String kJavaFailureMainClassNotFound = "CannotLoadMainClass";
static final String kJavaFailureMainClassHasNoMain = "NoMainMethod";
static final String kJavaFailureMainClassMainNotStatic = "MainNotStatic";
static final String kJavaFailureMainThrewException = "MainThrewException";
static final String kJavaFailureMainInitializerException = "MainInitializerException";
final boolean verbose; // Normally set by environment variable JAVA_LAUNCHER_VERBOSE.
final Map<String, ?> javaDictionary;
JavaAppLauncher(final Map<String, ?> javaDictionary, final boolean verbose) {
this.verbose = verbose;
this.javaDictionary = javaDictionary;
}
@Override
public void run() {
final Method m = loadMainMethod(getMainMethod());
final String methodName = m.getDeclaringClass().getName() + ".main(String[])";
try {
log("Calling " + methodName + " method");
m.invoke(null, new Object[] { getArguments() });
log(methodName + " has returned");
} catch (final IllegalAccessException x) {
try {
nativeInvokeNonPublic(m.getClass(), m, getArguments());
} catch (final Throwable excpt) {
logError(methodName + " threw an exception:");
if ((excpt instanceof UnsatisfiedLinkError) && excpt.getMessage().equals("nativeInvokeNonPublic")) {
showFailureAlertAndKill(kJavaFailureMainThrewException, "nativeInvokeNonPublic not registered");
} else {
excpt.printStackTrace();
showFailureAlertAndKill(kJavaFailureMainThrewException, excpt.toString());
}
}
} catch (final InvocationTargetException invokeExcpt) {
logError(methodName + " threw an exception:");
invokeExcpt.getTargetException().printStackTrace();
showFailureAlertAndKill(kJavaFailureMainThrewException, invokeExcpt.getTargetException().toString());
}
}
Method loadMainMethod(final String mainClassName) {
try {
final Class<?> mainClass = Class.forName(mainClassName, true, sun.misc.Launcher.getLauncher().getClassLoader());
final Method mainMethod = mainClass.getDeclaredMethod("main", new Class[] { String[].class });
if ((mainMethod.getModifiers() & Modifier.STATIC) == 0) {
logError("The main(String[]) method of class " + mainClassName + " is not static!");
showFailureAlertAndKill(kJavaFailureMainClassMainNotStatic, mainClassName);
}
return mainMethod;
} catch (final ExceptionInInitializerError x) {
logError("The main class \"" + mainClassName + "\" had a static initializer throw an exception.");
x.getException().printStackTrace();
showFailureAlertAndKill(kJavaFailureMainInitializerException, x.getException().toString());
} catch (final ClassNotFoundException x) {
logError("The main class \"" + mainClassName + "\" could not be found.");
showFailureAlertAndKill(kJavaFailureMainClassNotFound, mainClassName);
} catch (final NoSuchMethodException x) {
logError("The main class \"" + mainClassName + "\" has no static main(String[]) method.");
showFailureAlertAndKill(kJavaFailureMainClassHasNoMain, mainClassName);
} catch (final NullPointerException x) {
logError("No main class specified");
showFailureAlertAndKill(kJavaFailureMainClassNotSpecified, null);
}
return null;
}
// get main class name from 'Jar' key, or 'MainClass' key
String getMainMethod() {
final Object javaJar = javaDictionary.get("Jar");
if (javaJar != null) {
if (!(javaJar instanceof String)) {
logError("'Jar' key in 'Java' sub-dictionary of Info.plist requires a string value");
return null;
}
final String jarPath = (String)javaJar;
if (jarPath.length() == 0) {
log("'Jar' key of sub-dictionary 'Java' of Info.plist key is empty");
} else {
// extract main class from manifest of this jar
final String main = getMainFromManifest(jarPath);
if (main == null) {
logError("jar file '" + jarPath + "' does not have Main-Class: attribute in its manifest");
return null;
}
log("Main class " + main + " found in jar manifest");
return main;
}
}
final Object javaMain = javaDictionary.get("MainClass");
if (!(javaMain instanceof String)) {
logError("'MainClass' key in 'Java' sub-dictionary of Info.plist requires a string value");
return null;
}
final String main = (String)javaMain;
if (main.length() == 0) {
log("'MainClass' key of sub-dictionary 'Java' of Info.plist key is empty");
return null;
}
log("Main class " + (String)javaMain + " found via 'MainClass' key of sub-dictionary 'Java' of Info.plist key");
return (String)javaMain;
}
// get arguments for main(String[]) out of Info.plist and command line
String[] getArguments() {
// check for 'Arguments' key, which contains the main() args if not defined in Info.plist
final Object javaArguments = javaDictionary.get("Arguments");
if (javaArguments == null) {
// no arguments
log("No arguments for main(String[]) specified");
return new String[0];
}
if (javaArguments instanceof List) {
final List<?> args = (List<?>)javaArguments;
final int count = args.size();
log("Arguments to main(String[" + count + "]):");
final String[] result = new String[count];
for (int i = 0; i < count; ++i) {
final Object element = args.get(i);
if (element instanceof String) {
result[i] = (String)element;
} else {
logError("Found non-string in array");
}
log(" arg[" + i + "]=" + result[i]);
}
return result;
}
logError("'Arguments' key in 'Java' sub-dictionary of Info.plist requires a string value or an array of strings");
return new String[0];
}
// returns name of main class, or null
String getMainFromManifest(final String jarpath) {
JarFile jar = null;
try {
jar = new JarFile(jarpath);
final Manifest man = jar.getManifest();
final Attributes attr = man.getMainAttributes();
return attr.getValue("Main-Class");
} catch (final IOException x) {
// shrug
} finally {
if (jar != null) {
try {
jar.close();
} catch (final IOException x) { }
}
}
return null;
}
void log(final String s) {
if (!verbose) return;
System.out.println("[LaunchRunner] " + s);
}
static void logError(final String s) {
System.err.println("[LaunchRunner Error] " + s);
}
// This kills the app and does not return!
static void showFailureAlertAndKill(final String msg, String arg) {
if (arg == null) arg = "<<null>>";
JOptionPane.showMessageDialog(null, getMessage(msg, arg), "", JOptionPane.ERROR_MESSAGE);
System.exit(-1);
}
static String getMessage(final String msgKey, final Object ... args) {
final String msg = ResourceBundle.getBundle("appLauncherErrors").getString(msgKey);
return MessageFormat.format(msg, args);
}
}