Simplified JavaAppLauncher

exampleMemorySetting.sh

defaults write full.qualified.bundle.id JVMDefaults -array '-Xmx2048m' '-Xms128m'

Info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
 <key>CFBundleName</key>
 <string>AppName</string>
 <key>CFBundleIdentifier</key>
 <string>full.qualified.bundle.id</string>
 <key>CFBundleExecutable</key>
 <string>JavaAppLauncher</string>
 <key>JavaArguments</key>
 <array>
  <string>-cp</string>
  <string>$ROOT/lib/*:$ROOT/Classes:$ROOT/PlugIns/jdk/Contents/Home/lib/tools.jar</string>
  <string>-Djava.library.path=$ROOT/dylib</string>
  <string>-ea</string>
  <string>-esa</string>
  <string>-DsomeSysproperty</string>
  <string>name.of.main.Class</string>
  <string>main_arg0</string>
  <string>main_arg1</string>
 </array>
</dict>
</plist>

JavaAppLauncher.m

/*
 * Copyright 2012, 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.
 */

#import <Cocoa/Cocoa.h>
#include <jni.h>

#define JAVA_LAUNCH_ERROR "JavaLaunchError"
#define JAVA_ARGUMENTS_KEY "JavaArguments"

// TODO Remove these; they are defined by the makefile
#define FULL_VERSION "1.7.0"
#define DOT_VERSION "1.7.0"
#define DEFAULT_POLICY 0

typedef int (JNICALL *JLI_Launch_t)(int argc, char ** argv,
                                    int jargc, const char** jargv,
                                    int appclassc, const char** appclassv,
                                    const char* fullversion,
                                    const char* dotversion,
                                    const char* pname,
                                    const char* lname,
                                    jboolean javaargs,
                                    jboolean cpwildcard,
                                    jboolean javaw,
                                    jint ergo);

int main(int argc, char *argv[]) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    int result;
    @try {
	// Get the main bundle
	NSBundle *mainBundle = [NSBundle mainBundle];

	// Get the arguments
	NSDictionary *infoDictionary = [mainBundle infoDictionary];
	NSArray *arguments = [infoDictionary objectForKey:@JAVA_ARGUMENTS_KEY];
	if (arguments == nil) {
	    [NSException raise:@JAVA_LAUNCH_ERROR format:@"%@ is required.", @JAVA_ARGUMENTS_KEY];
	}

	// Get the defaults
	NSArray *defaults = [[NSUserDefaults standardUserDefaults] arrayForKey:@"JVMDefaults"];
	if (defaults == nil) {
	    defaults = [ NSArray array ];
	}

	// Load the runtime bundle which has to be named jdk and reside in PlugIns directory
	NSURL *runtimeBundleURL = [[mainBundle builtInPlugInsURL] URLByAppendingPathComponent:@"jdk"];
	CFBundleRef runtimeBundle = CFBundleCreate(NULL, (CFURLRef)runtimeBundleURL);

	NSError *bundleLoadError = nil;
	Boolean runtimeBundleLoaded = CFBundleLoadExecutableAndReturnError(runtimeBundle, (CFErrorRef *)&bundleLoadError);
	if (bundleLoadError != nil || !runtimeBundleLoaded) {
	    [NSException raise:@JAVA_LAUNCH_ERROR format:@"Could not load JRE from %@.", bundleLoadError];
	}

	// Get the JLI_Launch() function pointer
	JLI_Launch_t JLI_LaunchFxnPtr = CFBundleGetFunctionPointerForName(runtimeBundle, CFSTR("JLI_Launch"));
	if (JLI_LaunchFxnPtr == NULL) {
	    [NSException raise:@JAVA_LAUNCH_ERROR format:@"Could not get function pointer for JLI_Launch."];
	}

	// Initialize the arguments to JLI_Launch() replacing $ROOT by bundle path
	NSError *error = NULL;
	NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?<!\\\\)\\$ROOT(?!\\w)" options:0 error:&error];
	NSString *bundlePath = [[mainBundle bundlePath] stringByAppendingString:@"/Contents"];

	int i = 0;
	int jargc = 1 + [defaults count] + [arguments count];
	char *jargv[jargc];
	jargv[i++] = strdup(argv[0]);
	for (NSString *argument in defaults) {
	    NSString *arg = [regex stringByReplacingMatchesInString:argument options:0 range:NSMakeRange(0, [argument length]) withTemplate:bundlePath];
	    jargv[i++] = strdup([arg UTF8String]);
	}
	for (NSString *argument in arguments) {
	    NSString *arg = [regex stringByReplacingMatchesInString:argument options:0 range:NSMakeRange(0, [argument length]) withTemplate:bundlePath];
	    jargv[i++] = strdup([arg UTF8String]);
	}

	// Invoke JLI_Launch()
	JLI_LaunchFxnPtr(jargc, jargv, 0, NULL, 0, NULL, FULL_VERSION, DOT_VERSION, "java", "java", FALSE, TRUE, FALSE, DEFAULT_POLICY);
        result = 0;
    } @catch (NSException *exception) {
        NSLog(@"%@: %@", exception, [exception callStackSymbols]);
        result = 1;
    }
    [pool drain];
    return result;
}