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	/*
	* Copyright (c) 2007, 2018, 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 sun.launcher;

	/*
	*
	* <p><b>This is NOT part of any API supported by Sun Microsystems.
	* If you write code that depends on this, you do so at your own
	* risk. This code and its internal interfaces are subject to change
	* or deletion without notice.</b>
	*
	*/

	/**
	* A utility package for the java(1), javaw(1) launchers.
	* The following are helper methods that the native launcher uses
	* to perform checks etc. using JNI, see src/share/bin/java.c
	*/
	import java.io.File;
	import java.io.IOException;
	import java.io.PrintStream;
	import java.io.UnsupportedEncodingException;
	import java.lang.reflect.Method;
	import java.lang.reflect.Modifier;
	import java.math.BigDecimal;
	import java.math.RoundingMode;
	import java.nio.charset.Charset;
	import java.nio.file.DirectoryStream;
	import java.nio.file.Files;
	import java.nio.file.Path;
	import java.text.Normalizer;
	import java.util.ResourceBundle;
	import java.text.MessageFormat;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Locale;
	import java.util.Locale.Category;
	import java.util.Properties;
	import java.util.Set;
	import java.util.TreeSet;
	import java.util.jar.Attributes;
	import java.util.jar.JarFile;
	import java.util.jar.Manifest;
	import jdk.internal.platform.Container;
	import jdk.internal.platform.Metrics;

	public enum LauncherHelper {
	INSTANCE;
	private static final String MAIN_CLASS = "Main-Class";

	private static StringBuilder outBuf = new StringBuilder();

	private static final String INDENT = " ";
	private static final String VM_SETTINGS = "VM settings:";
	private static final String PROP_SETTINGS = "Property settings:";
	private static final String LOCALE_SETTINGS = "Locale settings:";

	// sync with java.c and sun.misc.VM
	private static final String diagprop = "sun.java.launcher.diag";
	final static boolean trace = sun.misc.VM.getSavedProperty(diagprop) != null;

	private static final String defaultBundleName =
	"sun.launcher.resources.launcher";
	private static class ResourceBundleHolder {
	private static final ResourceBundle RB =
	ResourceBundle.getBundle(defaultBundleName);
	}
	private static PrintStream ostream;
	private static final ClassLoader scloader = ClassLoader.getSystemClassLoader();
	private static Class<?> appClass; // application class, for GUI/reporting purposes

	/*
	* A method called by the launcher to print out the standard settings,
	* by default -XshowSettings is equivalent to -XshowSettings:all,
	* Specific information may be gotten by using suboptions with possible
	* values vm, properties and locale.
	*
	* printToStderr: choose between stdout and stderr
	*
	* optionFlag: specifies which options to print default is all other
	* possible values are vm, properties, locale.
	*
	* initialHeapSize: in bytes, as set by the launcher, a zero-value indicates
	* this code should determine this value, using a suitable method or
	* the line could be omitted.
	*
	* maxHeapSize: in bytes, as set by the launcher, a zero-value indicates
	* this code should determine this value, using a suitable method.
	*
	* stackSize: in bytes, as set by the launcher, a zero-value indicates
	* this code determine this value, using a suitable method or omit the
	* line entirely.
	*/
	@SuppressWarnings("fallthrough")
	static void showSettings(boolean printToStderr, String optionFlag,
	long initialHeapSize, long maxHeapSize, long stackSize,
	boolean isServer) {

	initOutput(printToStderr);
	String opts[] = optionFlag.split(":");
	String optStr = (opts.length > 1 && opts[1] != null)
	? opts[1].trim()
	: "all";
	switch (optStr) {
	case "vm":
	printVmSettings(initialHeapSize, maxHeapSize,
	stackSize, isServer);
	break;
	case "properties":
	printProperties();
	break;
	case "locale":
	printLocale();
	break;
	case "system":
	if (System.getProperty("os.name").contains("Linux")) {
	printSystemMetrics();
	break;
	}
	default:
	printVmSettings(initialHeapSize, maxHeapSize, stackSize,
	isServer);
	printProperties();
	printLocale();
	if (System.getProperty("os.name").contains("Linux")) {
	printSystemMetrics();
	}
	break;
	}
	}

	/*
	* prints the main vm settings subopt/section
	*/
	private static void printVmSettings(
	long initialHeapSize, long maxHeapSize,
	long stackSize, boolean isServer) {

	ostream.println(VM_SETTINGS);
	if (stackSize != 0L) {
	ostream.println(INDENT + "Stack Size: " +
	SizePrefix.scaleValue(stackSize));
	}
	if (initialHeapSize != 0L) {
	ostream.println(INDENT + "Min. Heap Size: " +
	SizePrefix.scaleValue(initialHeapSize));
	}
	if (maxHeapSize != 0L) {
	ostream.println(INDENT + "Max. Heap Size: " +
	SizePrefix.scaleValue(maxHeapSize));
	} else {
	ostream.println(INDENT + "Max. Heap Size (Estimated): "
	+ SizePrefix.scaleValue(Runtime.getRuntime().maxMemory()));
	}
	ostream.println(INDENT + "Ergonomics Machine Class: "
	+ ((isServer) ? "server" : "client"));
	ostream.println(INDENT + "Using VM: "
	+ System.getProperty("java.vm.name"));
	ostream.println();
	}

	/*
	* prints the properties subopt/section
	*/
	private static void printProperties() {
	Properties p = System.getProperties();
	ostream.println(PROP_SETTINGS);
	List<String> sortedPropertyKeys = new ArrayList<>();
	sortedPropertyKeys.addAll(p.stringPropertyNames());
	Collections.sort(sortedPropertyKeys);
	for (String x : sortedPropertyKeys) {
	printPropertyValue(x, p.getProperty(x));
	}
	ostream.println();
	}

	private static boolean isPath(String key) {
	return key.endsWith(".dirs") \|\| key.endsWith(".path");
	}

	private static void printPropertyValue(String key, String value) {
	ostream.print(INDENT + key + " = ");
	if (key.equals("line.separator")) {
	for (byte b : value.getBytes()) {
	switch (b) {
	case 0xd:
	ostream.print("\\r ");
	break;
	case 0xa:
	ostream.print("\\n ");
	break;
	default:
	// print any bizzare line separators in hex, but really
	// shouldn't happen.
	ostream.printf("0x%02X", b & 0xff);
	break;
	}
	}
	ostream.println();
	return;
	}
	if (!isPath(key)) {
	ostream.println(value);
	return;
	}
	String[] values = value.split(System.getProperty("path.separator"));
	boolean first = true;
	for (String s : values) {
	if (first) { // first line treated specially
	ostream.println(s);
	first = false;
	} else { // following lines prefix with indents
	ostream.println(INDENT + INDENT + s);
	}
	}
	}

	/*
	* prints the locale subopt/section
	*/
	private static void printLocale() {
	Locale locale = Locale.getDefault();
	ostream.println(LOCALE_SETTINGS);
	ostream.println(INDENT + "default locale = " +
	locale.getDisplayLanguage());
	ostream.println(INDENT + "default display locale = " +
	Locale.getDefault(Category.DISPLAY).getDisplayName());
	ostream.println(INDENT + "default format locale = " +
	Locale.getDefault(Category.FORMAT).getDisplayName());
	printLocales();
	ostream.println();
	}

	private static void printLocales() {
	Locale[] tlocales = Locale.getAvailableLocales();
	final int len = tlocales == null ? 0 : tlocales.length;
	if (len < 1 ) {
	return;
	}
	// Locale does not implement Comparable so we convert it to String
	// and sort it for pretty printing.
	Set<String> sortedSet = new TreeSet<>();
	for (Locale l : tlocales) {
	sortedSet.add(l.toString());
	}

	ostream.print(INDENT + "available locales = ");
	Iterator<String> iter = sortedSet.iterator();
	final int last = len - 1;
	for (int i = 0 ; iter.hasNext() ; i++) {
	String s = iter.next();
	ostream.print(s);
	if (i != last) {
	ostream.print(", ");
	}
	// print columns of 8
	if ((i + 1) % 8 == 0) {
	ostream.println();
	ostream.print(INDENT + INDENT);
	}
	}
	}

	public static void printSystemMetrics() {
	Metrics c = Container.metrics();

	ostream.println("Operating System Metrics:");

	if (c == null) {
	ostream.println(INDENT + "No metrics available for this platform");
	return;
	}

	ostream.println(INDENT + "Provider: " + c.getProvider());
	ostream.println(INDENT + "Effective CPU Count: " + c.getEffectiveCpuCount());
	ostream.println(INDENT + "CPU Period: " + c.getCpuPeriod() +
	(c.getCpuPeriod() == -1 ? "" : "us"));
	ostream.println(INDENT + "CPU Quota: " + c.getCpuQuota() +
	(c.getCpuQuota() == -1 ? "" : "us"));
	ostream.println(INDENT + "CPU Shares: " + c.getCpuShares());

	int cpus[] = c.getCpuSetCpus();
	ostream.println(INDENT + "List of Processors, "
	+ cpus.length + " total: ");

	ostream.print(INDENT);
	for (int i = 0; i < cpus.length; i++) {
	ostream.print(cpus[i] + " ");
	}
	if (cpus.length > 0) {
	ostream.println("");
	}

	cpus = c.getEffectiveCpuSetCpus();
	ostream.println(INDENT + "List of Effective Processors, "
	+ cpus.length + " total: ");

	ostream.print(INDENT);
	for (int i = 0; i < cpus.length; i++) {
	ostream.print(cpus[i] + " ");
	}
	if (cpus.length > 0) {
	ostream.println("");
	}

	int mems[] = c.getCpuSetMems();
	ostream.println(INDENT + "List of Memory Nodes, "
	+ mems.length + " total: ");

	ostream.print(INDENT);
	for (int i = 0; i < mems.length; i++) {
	ostream.print(mems[i] + " ");
	}
	if (mems.length > 0) {
	ostream.println("");
	}

	mems = c.getEffectiveCpuSetMems();
	ostream.println(INDENT + "List of Available Memory Nodes, "
	+ mems.length + " total: ");

	ostream.print(INDENT);
	for (int i = 0; i < mems.length; i++) {
	ostream.print(mems[i] + " ");
	}
	if (mems.length > 0) {
	ostream.println("");
	}

	ostream.println(INDENT + "CPUSet Memory Pressure Enabled: "
	+ c.isCpuSetMemoryPressureEnabled());

	long limit = c.getMemoryLimit();
	ostream.println(INDENT + "Memory Limit: " +
	((limit >= 0) ? SizePrefix.scaleValue(limit) : "Unlimited"));

	limit = c.getMemorySoftLimit();
	ostream.println(INDENT + "Memory Soft Limit: " +
	((limit >= 0) ? SizePrefix.scaleValue(limit) : "Unlimited"));

	limit = c.getMemoryAndSwapLimit();
	ostream.println(INDENT + "Memory & Swap Limit: " +
	((limit >= 0) ? SizePrefix.scaleValue(limit) : "Unlimited"));

	limit = c.getKernelMemoryLimit();
	ostream.println(INDENT + "Kernel Memory Limit: " +
	((limit >= 0) ? SizePrefix.scaleValue(limit) : "Unlimited"));

	limit = c.getTcpMemoryLimit();
	ostream.println(INDENT + "TCP Memory Limit: " +
	((limit >= 0) ? SizePrefix.scaleValue(limit) : "Unlimited"));

	ostream.println(INDENT + "Out Of Memory Killer Enabled: "
	+ c.isMemoryOOMKillEnabled());

	ostream.println("");
	}

	private enum SizePrefix {

	KILO(1024, "K"),
	MEGA(1024 * 1024, "M"),
	GIGA(1024 * 1024 * 1024, "G"),
	TERA(1024L * 1024L * 1024L * 1024L, "T");
	long size;
	String abbrev;

	SizePrefix(long size, String abbrev) {
	this.size = size;
	this.abbrev = abbrev;
	}

	private static String scale(long v, SizePrefix prefix) {
	return BigDecimal.valueOf(v).divide(BigDecimal.valueOf(prefix.size),
	2, RoundingMode.HALF_EVEN).toPlainString() + prefix.abbrev;
	}
	/*
	* scale the incoming values to a human readable form, represented as
	* K, M, G and T, see java.c parse_size for the scaled values and
	* suffixes. The lowest possible scaled value is Kilo.
	*/
	static String scaleValue(long v) {
	if (v < MEGA.size) {
	return scale(v, KILO);
	} else if (v < GIGA.size) {
	return scale(v, MEGA);
	} else if (v < TERA.size) {
	return scale(v, GIGA);
	} else {
	return scale(v, TERA);
	}
	}
	}

	/**
	* A private helper method to get a localized message and also
	* apply any arguments that we might pass.
	*/
	private static String getLocalizedMessage(String key, Object... args) {
	String msg = ResourceBundleHolder.RB.getString(key);
	return (args != null) ? MessageFormat.format(msg, args) : msg;
	}

	/**
	* The java -help message is split into 3 parts, an invariant, followed
	* by a set of platform dependent variant messages, finally an invariant
	* set of lines.
	* This method initializes the help message for the first time, and also
	* assembles the invariant header part of the message.
	*/
	static void initHelpMessage(String progname) {
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.header",
	(progname == null) ? "java" : progname ));
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.datamodel",
	32));
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.datamodel",
	64));
	}

	/**
	* Appends the vm selection messages to the header, already created.
	* initHelpSystem must already be called.
	*/
	static void appendVmSelectMessage(String vm1, String vm2) {
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.vmselect",
	vm1, vm2));
	}

	/**
	* Appends the vm synoym message to the header, already created.
	* initHelpSystem must be called before using this method.
	*/
	static void appendVmSynonymMessage(String vm1, String vm2) {
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.hotspot",
	vm1, vm2));
	}

	/**
	* Appends the vm Ergo message to the header, already created.
	* initHelpSystem must be called before using this method.
	*/
	static void appendVmErgoMessage(boolean isServerClass, String vm) {
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.ergo.message1",
	vm));
	outBuf = (isServerClass)
	? outBuf.append(",\n" +
	getLocalizedMessage("java.launcher.ergo.message2") + "\n\n")
	: outBuf.append(".\n\n");
	}

	/**
	* Appends the last invariant part to the previously created messages,
	* and finishes up the printing to the desired output stream.
	* initHelpSystem must be called before using this method.
	*/
	static void printHelpMessage(boolean printToStderr) {
	initOutput(printToStderr);
	outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.footer",
	File.pathSeparator));
	ostream.println(outBuf.toString());
	}

	/**
	* Prints the Xusage text to the desired output stream.
	*/
	static void printXUsageMessage(boolean printToStderr) {
	initOutput(printToStderr);
	ostream.println(getLocalizedMessage("java.launcher.X.usage",
	File.pathSeparator));
	if (System.getProperty("os.name").contains("OS X")) {
	ostream.println(getLocalizedMessage("java.launcher.X.macosx.usage",
	File.pathSeparator));
	}
	}

	static void initOutput(boolean printToStderr) {
	ostream = (printToStderr) ? System.err : System.out;
	}

	static String getMainClassFromJar(String jarname) {
	String mainValue = null;
	try (JarFile jarFile = new JarFile(jarname)) {
	Manifest manifest = jarFile.getManifest();
	if (manifest == null) {
	abort(null, "java.launcher.jar.error2", jarname);
	}
	Attributes mainAttrs = manifest.getMainAttributes();
	if (mainAttrs == null) {
	abort(null, "java.launcher.jar.error3", jarname);
	}
	mainValue = mainAttrs.getValue(MAIN_CLASS);
	if (mainValue == null) {
	abort(null, "java.launcher.jar.error3", jarname);
	}

	/*
	* Hand off to FXHelper if it detects a JavaFX application
	* This must be done after ensuring a Main-Class entry
	* exists to enforce compliance with the jar specification
	*/
	if (mainAttrs.containsKey(
	new Attributes.Name(FXHelper.JAVAFX_APPLICATION_MARKER))) {
	return FXHelper.class.getName();
	}

	return mainValue.trim();
	} catch (IOException ioe) {
	abort(ioe, "java.launcher.jar.error1", jarname);
	}
	return null;
	}

	// From src/share/bin/java.c:
	// enum LaunchMode { LM_UNKNOWN = 0, LM_CLASS, LM_JAR };

	private static final int LM_UNKNOWN = 0;
	private static final int LM_CLASS = 1;
	private static final int LM_JAR = 2;

	static void abort(Throwable t, String msgKey, Object... args) {
	if (msgKey != null) {
	ostream.println(getLocalizedMessage(msgKey, args));
	}
	if (trace) {
	if (t != null) {
	t.printStackTrace();
	} else {
	Thread.dumpStack();
	}
	}
	System.exit(1);
	}

	/**
	* This method does the following:
	* 1. gets the classname from a Jar's manifest, if necessary
	* 2. loads the class using the System ClassLoader
	* 3. ensures the availability and accessibility of the main method,
	* using signatureDiagnostic method.
	* a. does the class exist
	* b. is there a main
	* c. is the main public
	* d. is the main static
	* e. does the main take a String array for args
	* 4. if no main method and if the class extends FX Application, then call
	* on FXHelper to determine the main class to launch
	* 5. and off we go......
	*
	* @param printToStderr if set, all output will be routed to stderr
	* @param mode LaunchMode as determined by the arguments passed on the
	* command line
	* @param what either the jar file to launch or the main class when using
	* LM_CLASS mode
	* @return the application's main class
	*/
	public static Class<?> checkAndLoadMain(boolean printToStderr,
	int mode,
	String what) {
	initOutput(printToStderr);
	// get the class name
	String cn = null;
	switch (mode) {
	case LM_CLASS:
	cn = what;
	break;
	case LM_JAR:
	cn = getMainClassFromJar(what);
	break;
	default:
	// should never happen
	throw new InternalError("" + mode + ": Unknown launch mode");
	}
	cn = cn.replace('/', '.');
	Class<?> mainClass = null;
	try {
	mainClass = scloader.loadClass(cn);
	} catch (NoClassDefFoundError \| ClassNotFoundException cnfe) {
	if (System.getProperty("os.name", "").contains("OS X")
	&& Normalizer.isNormalized(cn, Normalizer.Form.NFD)) {
	try {
	// On Mac OS X since all names with diacretic symbols are given as decomposed it
	// is possible that main class name comes incorrectly from the command line
	// and we have to re-compose it
	mainClass = scloader.loadClass(Normalizer.normalize(cn, Normalizer.Form.NFC));
	} catch (NoClassDefFoundError \| ClassNotFoundException cnfe1) {
	abort(cnfe, "java.launcher.cls.error1", cn);
	}
	} else {
	abort(cnfe, "java.launcher.cls.error1", cn);
	}
	}
	// set to mainClass
	appClass = mainClass;

	/*
	* Check if FXHelper can launch it using the FX launcher. In an FX app,
	* the main class may or may not have a main method, so do this before
	* validating the main class.
	*/
	if (mainClass.equals(FXHelper.class) \|\|
	FXHelper.doesExtendFXApplication(mainClass)) {
	// Will abort() if there are problems with the FX runtime
	FXHelper.setFXLaunchParameters(what, mode);
	return FXHelper.class;
	}

	validateMainClass(mainClass);
	return mainClass;
	}

	/*
	* Accessor method called by the launcher after getting the main class via
	* checkAndLoadMain(). The "application class" is the class that is finally
	* executed to start the application and in this case is used to report
	* the correct application name, typically for UI purposes.
	*/
	public static Class<?> getApplicationClass() {
	return appClass;
	}

	// Check the existence and signature of main and abort if incorrect
	static void validateMainClass(Class<?> mainClass) {
	Method mainMethod;
	try {
	mainMethod = mainClass.getMethod("main", String[].class);
	} catch (NoSuchMethodException nsme) {
	// invalid main or not FX application, abort with an error
	abort(null, "java.launcher.cls.error4", mainClass.getName(),
	FXHelper.JAVAFX_APPLICATION_CLASS_NAME);
	return; // Avoid compiler issues
	}

	/*
	* getMethod (above) will choose the correct method, based
	* on its name and parameter type, however, we still have to
	* ensure that the method is static and returns a void.
	*/
	int mod = mainMethod.getModifiers();
	if (!Modifier.isStatic(mod)) {
	abort(null, "java.launcher.cls.error2", "static",
	mainMethod.getDeclaringClass().getName());
	}
	if (mainMethod.getReturnType() != java.lang.Void.TYPE) {
	abort(null, "java.launcher.cls.error3",
	mainMethod.getDeclaringClass().getName());
	}
	}

	private static final String encprop = "sun.jnu.encoding";
	private static String encoding = null;
	private static boolean isCharsetSupported = false;

	/*
	* converts a c or a byte array to a platform specific string,
	* previously implemented as a native method in the launcher.
	*/
	static String makePlatformString(boolean printToStderr, byte[] inArray) {
	initOutput(printToStderr);
	if (encoding == null) {
	encoding = System.getProperty(encprop);
	isCharsetSupported = Charset.isSupported(encoding);
	}
	try {
	String out = isCharsetSupported
	? new String(inArray, encoding)
	: new String(inArray);
	return out;
	} catch (UnsupportedEncodingException uee) {
	abort(uee, null);
	}
	return null; // keep the compiler happy
	}

	static String[] expandArgs(String[] argArray) {
	List<StdArg> aList = new ArrayList<>();
	for (String x : argArray) {
	aList.add(new StdArg(x));
	}
	return expandArgs(aList);
	}

	static String[] expandArgs(List<StdArg> argList) {
	ArrayList<String> out = new ArrayList<>();
	if (trace) {
	System.err.println("Incoming arguments:");
	}
	for (StdArg a : argList) {
	if (trace) {
	System.err.println(a);
	}
	if (a.needsExpansion) {
	File x = new File(a.arg);
	File parent = x.getParentFile();
	String glob = x.getName();
	if (parent == null) {
	parent = new File(".");
	}
	try (DirectoryStream<Path> dstream =
	Files.newDirectoryStream(parent.toPath(), glob)) {
	int entries = 0;
	for (Path p : dstream) {
	out.add(p.normalize().toString());
	entries++;
	}
	if (entries == 0) {
	out.add(a.arg);
	}
	} catch (Exception e) {
	out.add(a.arg);
	if (trace) {
	System.err.println("Warning: passing argument as-is " + a);
	System.err.print(e);
	}
	}
	} else {
	out.add(a.arg);
	}
	}
	String[] oarray = new String[out.size()];
	out.toArray(oarray);

	if (trace) {
	System.err.println("Expanded arguments:");
	for (String x : oarray) {
	System.err.println(x);
	}
	}
	return oarray;
	}

	/* duplicate of the native StdArg struct */
	private static class StdArg {
	final String arg;
	final boolean needsExpansion;
	StdArg(String arg, boolean expand) {
	this.arg = arg;
	this.needsExpansion = expand;
	}
	// protocol: first char indicates whether expansion is required
	// 'T' = true ; needs expansion
	// 'F' = false; needs no expansion
	StdArg(String in) {
	this.arg = in.substring(1);
	needsExpansion = in.charAt(0) == 'T';
	}
	public String toString() {
	return "StdArg{" + "arg=" + arg + ", needsExpansion=" + needsExpansion + '}';
	}
	}

	static final class FXHelper {
	// Marker entry in jar manifest that designates a JavaFX application jar
	private static final String JAVAFX_APPLICATION_MARKER =
	"JavaFX-Application-Class";
	private static final String JAVAFX_APPLICATION_CLASS_NAME =
	"javafx.application.Application";
	private static final String JAVAFX_LAUNCHER_CLASS_NAME =
	"com.sun.javafx.application.LauncherImpl";

	/*
	* The launch method used to invoke the JavaFX launcher. These must
	* match the strings used in the launchApplication method.
	*
	* Command line JavaFX-App-Class Launch mode FX Launch mode
	* java -cp fxapp.jar FXClass N/A LM_CLASS "LM_CLASS"
	* java -cp somedir FXClass N/A LM_CLASS "LM_CLASS"
	* java -jar fxapp.jar Present LM_JAR "LM_JAR"
	* java -jar fxapp.jar Not Present LM_JAR "LM_JAR"
	*/
	private static final String JAVAFX_LAUNCH_MODE_CLASS = "LM_CLASS";
	private static final String JAVAFX_LAUNCH_MODE_JAR = "LM_JAR";

	/*
	* FX application launcher and launch method, so we can launch
	* applications with no main method.
	*/
	private static String fxLaunchName = null;
	private static String fxLaunchMode = null;

	private static Class<?> fxLauncherClass = null;
	private static Method fxLauncherMethod = null;

	/*
	* Set the launch params according to what was passed to LauncherHelper
	* so we can use the same launch mode for FX. Abort if there is any
	* issue with loading the FX runtime or with the launcher method.
	*/
	private static void setFXLaunchParameters(String what, int mode) {
	// Check for the FX launcher classes
	try {
	fxLauncherClass = scloader.loadClass(JAVAFX_LAUNCHER_CLASS_NAME);
	/*
	* signature must be:
	* public static void launchApplication(String launchName,
	* String launchMode, String[] args);
	*/
	fxLauncherMethod = fxLauncherClass.getMethod("launchApplication",
	String.class, String.class, String[].class);

	// verify launcher signature as we do when validating the main method
	int mod = fxLauncherMethod.getModifiers();
	if (!Modifier.isStatic(mod)) {
	abort(null, "java.launcher.javafx.error1");
	}
	if (fxLauncherMethod.getReturnType() != java.lang.Void.TYPE) {
	abort(null, "java.launcher.javafx.error1");
	}
	} catch (ClassNotFoundException \| NoSuchMethodException ex) {
	abort(ex, "java.launcher.cls.error5", ex);
	}

	fxLaunchName = what;
	switch (mode) {
	case LM_CLASS:
	fxLaunchMode = JAVAFX_LAUNCH_MODE_CLASS;
	break;
	case LM_JAR:
	fxLaunchMode = JAVAFX_LAUNCH_MODE_JAR;
	break;
	default:
	// should not have gotten this far...
	throw new InternalError(mode + ": Unknown launch mode");
	}
	}

	/*
	* Check if the given class is a JavaFX Application class. This is done
	* in a way that does not cause the Application class to load or throw
	* ClassNotFoundException if the JavaFX runtime is not available.
	*/
	private static boolean doesExtendFXApplication(Class<?> mainClass) {
	for (Class<?> sc = mainClass.getSuperclass(); sc != null;
	sc = sc.getSuperclass()) {
	if (sc.getName().equals(JAVAFX_APPLICATION_CLASS_NAME)) {
	return true;
	}
	}
	return false;
	}

	public static void main(String... args) throws Exception {
	if (fxLauncherMethod == null
	\|\| fxLaunchMode == null
	\|\| fxLaunchName == null) {
	throw new RuntimeException("Invalid JavaFX launch parameters");
	}
	// launch appClass via fxLauncherMethod
	fxLauncherMethod.invoke(null,
	new Object[] {fxLaunchName, fxLaunchMode, args});
	}
	}
	}

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