1 /*
2 * Copyright (c) 2007, 2013, 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 sun.launcher;
27
28 /*
29 *
30 * <p><b>This is NOT part of any API supported by Sun Microsystems.
31 * If you write code that depends on this, you do so at your own
32 * risk. This code and its internal interfaces are subject to change
33 * or deletion without notice.</b>
34 *
35 */
36
37 /**
38 * A utility package for the java(1), javaw(1) launchers.
39 * The following are helper methods that the native launcher uses
40 * to perform checks etc. using JNI, see src/share/bin/java.c
41 */
42 import java.io.File;
43 import java.io.IOException;
44 import java.io.PrintStream;
45 import java.io.UnsupportedEncodingException;
46 import java.lang.reflect.Method;
47 import java.lang.reflect.Modifier;
48 import java.math.BigDecimal;
49 import java.math.RoundingMode;
50 import java.nio.charset.Charset;
51 import java.nio.file.DirectoryStream;
52 import java.nio.file.Files;
53 import java.nio.file.Path;
54 import java.text.Normalizer;
55 import java.util.ResourceBundle;
56 import java.text.MessageFormat;
57 import java.util.ArrayList;
58 import java.util.Collections;
59 import java.util.Iterator;
60 import java.util.List;
61 import java.util.Locale;
62 import java.util.Locale.Category;
63 import java.util.Properties;
64 import java.util.Set;
65 import java.util.TreeSet;
66 import java.util.jar.Attributes;
67 import java.util.jar.JarFile;
68 import java.util.jar.Manifest;
69
70 public enum LauncherHelper {
71 INSTANCE;
72
73 // used to identify JavaFX applications
74 private static final String JAVAFX_APPLICATION_MARKER =
75 "JavaFX-Application-Class";
76 private static final String JAVAFX_APPLICATION_CLASS_NAME =
77 "javafx.application.Application";
78 private static final String JAVAFX_FXHELPER_CLASS_NAME_SUFFIX =
79 "sun.launcher.LauncherHelper$FXHelper";
80 private static final String MAIN_CLASS = "Main-Class";
81
82 private static StringBuilder outBuf = new StringBuilder();
83
84 private static final String INDENT = " ";
85 private static final String VM_SETTINGS = "VM settings:";
86 private static final String PROP_SETTINGS = "Property settings:";
87 private static final String LOCALE_SETTINGS = "Locale settings:";
88
89 // sync with java.c and sun.misc.VM
90 private static final String diagprop = "sun.java.launcher.diag";
91 final static boolean trace = sun.misc.VM.getSavedProperty(diagprop) != null;
92
93 private static final String defaultBundleName =
94 "sun.launcher.resources.launcher";
95 private static class ResourceBundleHolder {
96 private static final ResourceBundle RB =
97 ResourceBundle.getBundle(defaultBundleName);
98 }
99 private static PrintStream ostream;
100 private static final ClassLoader scloader = ClassLoader.getSystemClassLoader();
101 private static Class<?> appClass; // application class, for GUI/reporting purposes
102
103 /*
104 * A method called by the launcher to print out the standard settings,
105 * by default -XshowSettings is equivalent to -XshowSettings:all,
106 * Specific information may be gotten by using suboptions with possible
107 * values vm, properties and locale.
108 *
109 * printToStderr: choose between stdout and stderr
110 *
111 * optionFlag: specifies which options to print default is all other
112 * possible values are vm, properties, locale.
113 *
114 * initialHeapSize: in bytes, as set by the launcher, a zero-value indicates
115 * this code should determine this value, using a suitable method or
116 * the line could be omitted.
117 *
118 * maxHeapSize: in bytes, as set by the launcher, a zero-value indicates
119 * this code should determine this value, using a suitable method.
120 *
121 * stackSize: in bytes, as set by the launcher, a zero-value indicates
122 * this code determine this value, using a suitable method or omit the
123 * line entirely.
124 */
125 static void showSettings(boolean printToStderr, String optionFlag,
126 long initialHeapSize, long maxHeapSize, long stackSize,
127 boolean isServer) {
128
129 initOutput(printToStderr);
130 String opts[] = optionFlag.split(":");
131 String optStr = (opts.length > 1 && opts[1] != null)
132 ? opts[1].trim()
133 : "all";
134 switch (optStr) {
135 case "vm":
136 printVmSettings(initialHeapSize, maxHeapSize,
137 stackSize, isServer);
138 break;
139 case "properties":
140 printProperties();
141 break;
142 case "locale":
143 printLocale();
144 break;
145 default:
146 printVmSettings(initialHeapSize, maxHeapSize, stackSize,
147 isServer);
148 printProperties();
149 printLocale();
150 break;
151 }
152 }
153
154 /*
155 * prints the main vm settings subopt/section
156 */
157 private static void printVmSettings(
158 long initialHeapSize, long maxHeapSize,
159 long stackSize, boolean isServer) {
160
161 ostream.println(VM_SETTINGS);
162 if (stackSize != 0L) {
163 ostream.println(INDENT + "Stack Size: " +
164 SizePrefix.scaleValue(stackSize));
165 }
166 if (initialHeapSize != 0L) {
167 ostream.println(INDENT + "Min. Heap Size: " +
168 SizePrefix.scaleValue(initialHeapSize));
169 }
170 if (maxHeapSize != 0L) {
171 ostream.println(INDENT + "Max. Heap Size: " +
172 SizePrefix.scaleValue(maxHeapSize));
173 } else {
174 ostream.println(INDENT + "Max. Heap Size (Estimated): "
175 + SizePrefix.scaleValue(Runtime.getRuntime().maxMemory()));
176 }
177 ostream.println(INDENT + "Ergonomics Machine Class: "
178 + ((isServer) ? "server" : "client"));
179 ostream.println(INDENT + "Using VM: "
180 + System.getProperty("java.vm.name"));
181 ostream.println();
182 }
183
184 /*
185 * prints the properties subopt/section
186 */
187 private static void printProperties() {
188 Properties p = System.getProperties();
189 ostream.println(PROP_SETTINGS);
190 List<String> sortedPropertyKeys = new ArrayList<>();
191 sortedPropertyKeys.addAll(p.stringPropertyNames());
192 Collections.sort(sortedPropertyKeys);
193 for (String x : sortedPropertyKeys) {
194 printPropertyValue(x, p.getProperty(x));
195 }
196 ostream.println();
197 }
198
199 private static boolean isPath(String key) {
200 return key.endsWith(".dirs") || key.endsWith(".path");
201 }
202
203 private static void printPropertyValue(String key, String value) {
204 ostream.print(INDENT + key + " = ");
205 if (key.equals("line.separator")) {
206 for (byte b : value.getBytes()) {
207 switch (b) {
208 case 0xd:
209 ostream.print("\\r ");
210 break;
211 case 0xa:
212 ostream.print("\\n ");
213 break;
214 default:
215 // print any bizzare line separators in hex, but really
216 // shouldn't happen.
217 ostream.printf("0x%02X", b & 0xff);
218 break;
219 }
220 }
221 ostream.println();
222 return;
223 }
224 if (!isPath(key)) {
225 ostream.println(value);
226 return;
227 }
228 String[] values = value.split(System.getProperty("path.separator"));
229 boolean first = true;
230 for (String s : values) {
231 if (first) { // first line treated specially
232 ostream.println(s);
233 first = false;
234 } else { // following lines prefix with indents
235 ostream.println(INDENT + INDENT + s);
236 }
237 }
238 }
239
240 /*
241 * prints the locale subopt/section
242 */
243 private static void printLocale() {
244 Locale locale = Locale.getDefault();
245 ostream.println(LOCALE_SETTINGS);
246 ostream.println(INDENT + "default locale = " +
247 locale.getDisplayLanguage());
248 ostream.println(INDENT + "default display locale = " +
249 Locale.getDefault(Category.DISPLAY).getDisplayName());
250 ostream.println(INDENT + "default format locale = " +
251 Locale.getDefault(Category.FORMAT).getDisplayName());
252 printLocales();
253 ostream.println();
254 }
255
256 private static void printLocales() {
257 Locale[] tlocales = Locale.getAvailableLocales();
258 final int len = tlocales == null ? 0 : tlocales.length;
259 if (len < 1 ) {
260 return;
261 }
262 // Locale does not implement Comparable so we convert it to String
263 // and sort it for pretty printing.
264 Set<String> sortedSet = new TreeSet<>();
265 for (Locale l : tlocales) {
266 sortedSet.add(l.toString());
267 }
268
269 ostream.print(INDENT + "available locales = ");
270 Iterator<String> iter = sortedSet.iterator();
271 final int last = len - 1;
272 for (int i = 0 ; iter.hasNext() ; i++) {
273 String s = iter.next();
274 ostream.print(s);
275 if (i != last) {
276 ostream.print(", ");
277 }
278 // print columns of 8
279 if ((i + 1) % 8 == 0) {
280 ostream.println();
281 ostream.print(INDENT + INDENT);
282 }
283 }
284 }
285
286 private enum SizePrefix {
287
288 KILO(1024, "K"),
289 MEGA(1024 * 1024, "M"),
290 GIGA(1024 * 1024 * 1024, "G"),
291 TERA(1024L * 1024L * 1024L * 1024L, "T");
292 long size;
293 String abbrev;
294
295 SizePrefix(long size, String abbrev) {
296 this.size = size;
297 this.abbrev = abbrev;
298 }
299
300 private static String scale(long v, SizePrefix prefix) {
301 return BigDecimal.valueOf(v).divide(BigDecimal.valueOf(prefix.size),
302 2, RoundingMode.HALF_EVEN).toPlainString() + prefix.abbrev;
303 }
304 /*
305 * scale the incoming values to a human readable form, represented as
306 * K, M, G and T, see java.c parse_size for the scaled values and
307 * suffixes. The lowest possible scaled value is Kilo.
308 */
309 static String scaleValue(long v) {
310 if (v < MEGA.size) {
311 return scale(v, KILO);
312 } else if (v < GIGA.size) {
313 return scale(v, MEGA);
314 } else if (v < TERA.size) {
315 return scale(v, GIGA);
316 } else {
317 return scale(v, TERA);
318 }
319 }
320 }
321
322 /**
323 * A private helper method to get a localized message and also
324 * apply any arguments that we might pass.
325 */
326 private static String getLocalizedMessage(String key, Object... args) {
327 String msg = ResourceBundleHolder.RB.getString(key);
328 return (args != null) ? MessageFormat.format(msg, args) : msg;
329 }
330
331 /**
332 * The java -help message is split into 3 parts, an invariant, followed
333 * by a set of platform dependent variant messages, finally an invariant
334 * set of lines.
335 * This method initializes the help message for the first time, and also
336 * assembles the invariant header part of the message.
337 */
338 static void initHelpMessage(String progname) {
339 outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.header",
340 (progname == null) ? "java" : progname ));
341 outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.datamodel",
342 32));
343 outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.datamodel",
344 64));
345 }
346
347 /**
348 * Appends the vm selection messages to the header, already created.
349 * initHelpSystem must already be called.
350 */
351 static void appendVmSelectMessage(String vm1, String vm2) {
352 outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.vmselect",
353 vm1, vm2));
354 }
355
356 /**
357 * Appends the vm synoym message to the header, already created.
358 * initHelpSystem must be called before using this method.
359 */
360 static void appendVmSynonymMessage(String vm1, String vm2) {
361 outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.hotspot",
362 vm1, vm2));
363 }
364
365 /**
366 * Appends the vm Ergo message to the header, already created.
367 * initHelpSystem must be called before using this method.
368 */
369 static void appendVmErgoMessage(boolean isServerClass, String vm) {
370 outBuf = outBuf.append(getLocalizedMessage("java.launcher.ergo.message1",
371 vm));
372 outBuf = (isServerClass) ? outBuf.append(",\n")
373 .append(getLocalizedMessage("java.launcher.ergo.message2"))
374 .append("\n\n") : outBuf.append(".\n\n");
375 }
376
377 /**
378 * Appends the last invariant part to the previously created messages,
379 * and finishes up the printing to the desired output stream.
380 * initHelpSystem must be called before using this method.
381 */
382 static void printHelpMessage(boolean printToStderr) {
383 initOutput(printToStderr);
384 outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.footer",
385 File.pathSeparator));
386 ostream.println(outBuf.toString());
387 }
388
389 /**
390 * Prints the Xusage text to the desired output stream.
391 */
392 static void printXUsageMessage(boolean printToStderr) {
393 initOutput(printToStderr);
394 ostream.println(getLocalizedMessage("java.launcher.X.usage",
395 File.pathSeparator));
396 if (System.getProperty("os.name").contains("OS X")) {
397 ostream.println(getLocalizedMessage("java.launcher.X.macosx.usage",
398 File.pathSeparator));
399 }
400 }
401
402 static void initOutput(boolean printToStderr) {
403 ostream = (printToStderr) ? System.err : System.out;
404 }
405
406 static String getMainClassFromJar(String jarname) {
407 String mainValue = null;
408 try (JarFile jarFile = new JarFile(jarname)) {
409 Manifest manifest = jarFile.getManifest();
410 if (manifest == null) {
411 abort(null, "java.launcher.jar.error2", jarname);
412 }
413 Attributes mainAttrs = manifest.getMainAttributes();
414 if (mainAttrs == null) {
415 abort(null, "java.launcher.jar.error3", jarname);
416 }
417 mainValue = mainAttrs.getValue(MAIN_CLASS);
418 if (mainValue == null) {
419 abort(null, "java.launcher.jar.error3", jarname);
420 }
421
422 /*
423 * Hand off to FXHelper if it detects a JavaFX application
424 * This must be done after ensuring a Main-Class entry
425 * exists to enforce compliance with the jar specification
426 */
427 if (mainAttrs.containsKey(
428 new Attributes.Name(JAVAFX_APPLICATION_MARKER))) {
429 FXHelper.setFXLaunchParameters(jarname, LM_JAR);
430 return FXHelper.class.getName();
431 }
432
433 return mainValue.trim();
434 } catch (IOException ioe) {
435 abort(ioe, "java.launcher.jar.error1", jarname);
436 }
437 return null;
438 }
439
440 // From src/share/bin/java.c:
441 // enum LaunchMode { LM_UNKNOWN = 0, LM_CLASS, LM_JAR };
442
443 private static final int LM_UNKNOWN = 0;
444 private static final int LM_CLASS = 1;
445 private static final int LM_JAR = 2;
446
447 static void abort(Throwable t, String msgKey, Object... args) {
448 if (msgKey != null) {
449 ostream.println(getLocalizedMessage(msgKey, args));
450 }
451 if (trace) {
452 if (t != null) {
453 t.printStackTrace();
454 } else {
455 Thread.dumpStack();
456 }
457 }
458 System.exit(1);
459 }
460
461 /**
462 * This method does the following:
463 * 1. gets the classname from a Jar's manifest, if necessary
464 * 2. loads the class using the System ClassLoader
465 * 3. ensures the availability and accessibility of the main method,
466 * using signatureDiagnostic method.
467 * a. does the class exist
468 * b. is there a main
469 * c. is the main public
470 * d. is the main static
471 * e. does the main take a String array for args
472 * 4. if no main method and if the class extends FX Application, then call
473 * on FXHelper to determine the main class to launch
474 * 5. and off we go......
475 *
476 * @param printToStderr if set, all output will be routed to stderr
477 * @param mode LaunchMode as determined by the arguments passed on the
478 * command line
479 * @param what either the jar file to launch or the main class when using
480 * LM_CLASS mode
481 * @return the application's main class
482 */
483 public static Class<?> checkAndLoadMain(boolean printToStderr,
484 int mode,
485 String what) {
486 initOutput(printToStderr);
487 // get the class name
488 String cn = null;
489 switch (mode) {
490 case LM_CLASS:
491 cn = what;
492 break;
493 case LM_JAR:
494 cn = getMainClassFromJar(what);
495 break;
496 default:
497 // should never happen
498 throw new InternalError("" + mode + ": Unknown launch mode");
499 }
500 cn = cn.replace('/', '.');
501 Class<?> mainClass = null;
502 try {
503 mainClass = scloader.loadClass(cn);
504 } catch (NoClassDefFoundError | ClassNotFoundException cnfe) {
505 if (System.getProperty("os.name", "").contains("OS X")
506 && Normalizer.isNormalized(cn, Normalizer.Form.NFD)) {
507 try {
508 // On Mac OS X since all names with diacretic symbols are given as decomposed it
509 // is possible that main class name comes incorrectly from the command line
510 // and we have to re-compose it
511 mainClass = scloader.loadClass(Normalizer.normalize(cn, Normalizer.Form.NFC));
512 } catch (NoClassDefFoundError | ClassNotFoundException cnfe1) {
513 abort(cnfe, "java.launcher.cls.error1", cn);
514 }
515 } else {
516 abort(cnfe, "java.launcher.cls.error1", cn);
517 }
518 }
519 // set to mainClass
520 appClass = mainClass;
521
522 /*
523 * Check if FXHelper can launch it using the FX launcher. In an FX app,
524 * the main class may or may not have a main method, so do this before
525 * validating the main class.
526 */
527 if (JAVAFX_FXHELPER_CLASS_NAME_SUFFIX.equals(mainClass.getName()) ||
528 doesExtendFXApplication(mainClass)) {
529 // Will abort() if there are problems with FX runtime
530 FXHelper.setFXLaunchParameters(what, mode);
531 return FXHelper.class;
532 }
533
534 validateMainClass(mainClass);
535 return mainClass;
536 }
537
538 /*
539 * Accessor method called by the launcher after getting the main class via
540 * checkAndLoadMain(). The "application class" is the class that is finally
541 * executed to start the application and in this case is used to report
542 * the correct application name, typically for UI purposes.
543 */
544 public static Class<?> getApplicationClass() {
545 return appClass;
546 }
547
548 /*
549 * Check if the given class is a JavaFX Application class. This is done
550 * in a way that does not cause the Application class to load or throw
551 * ClassNotFoundException if the JavaFX runtime is not available.
552 */
553 private static boolean doesExtendFXApplication(Class<?> mainClass) {
554 for (Class<?> sc = mainClass.getSuperclass(); sc != null;
555 sc = sc.getSuperclass()) {
556 if (sc.getName().equals(JAVAFX_APPLICATION_CLASS_NAME)) {
557 return true;
558 }
559 }
560 return false;
561 }
562
563 // Check the existence and signature of main and abort if incorrect
564 static void validateMainClass(Class<?> mainClass) {
565 Method mainMethod;
566 try {
567 mainMethod = mainClass.getMethod("main", String[].class);
568 } catch (NoSuchMethodException nsme) {
569 // invalid main or not FX application, abort with an error
570 abort(null, "java.launcher.cls.error4", mainClass.getName(),
571 JAVAFX_APPLICATION_CLASS_NAME);
572 return; // Avoid compiler issues
573 }
574
575 /*
576 * getMethod (above) will choose the correct method, based
577 * on its name and parameter type, however, we still have to
578 * ensure that the method is static and returns a void.
579 */
580 int mod = mainMethod.getModifiers();
581 if (!Modifier.isStatic(mod)) {
582 abort(null, "java.launcher.cls.error2", "static",
583 mainMethod.getDeclaringClass().getName());
584 }
585 if (mainMethod.getReturnType() != java.lang.Void.TYPE) {
586 abort(null, "java.launcher.cls.error3",
587 mainMethod.getDeclaringClass().getName());
588 }
589 }
590
591 private static final String encprop = "sun.jnu.encoding";
592 private static String encoding = null;
593 private static boolean isCharsetSupported = false;
594
595 /*
596 * converts a c or a byte array to a platform specific string,
597 * previously implemented as a native method in the launcher.
598 */
599 static String makePlatformString(boolean printToStderr, byte[] inArray) {
600 initOutput(printToStderr);
601 if (encoding == null) {
602 encoding = System.getProperty(encprop);
603 isCharsetSupported = Charset.isSupported(encoding);
604 }
605 try {
606 String out = isCharsetSupported
607 ? new String(inArray, encoding)
608 : new String(inArray);
609 return out;
610 } catch (UnsupportedEncodingException uee) {
611 abort(uee, null);
612 }
613 return null; // keep the compiler happy
614 }
615
616 static String[] expandArgs(String[] argArray) {
617 List<StdArg> aList = new ArrayList<>();
618 for (String x : argArray) {
619 aList.add(new StdArg(x));
620 }
621 return expandArgs(aList);
622 }
623
624 static String[] expandArgs(List<StdArg> argList) {
625 ArrayList<String> out = new ArrayList<>();
626 if (trace) {
627 System.err.println("Incoming arguments:");
628 }
629 for (StdArg a : argList) {
630 if (trace) {
631 System.err.println(a);
632 }
633 if (a.needsExpansion) {
634 File x = new File(a.arg);
635 File parent = x.getParentFile();
636 String glob = x.getName();
637 if (parent == null) {
638 parent = new File(".");
639 }
640 try (DirectoryStream<Path> dstream =
641 Files.newDirectoryStream(parent.toPath(), glob)) {
642 int entries = 0;
643 for (Path p : dstream) {
644 out.add(p.normalize().toString());
645 entries++;
646 }
647 if (entries == 0) {
648 out.add(a.arg);
649 }
650 } catch (Exception e) {
651 out.add(a.arg);
652 if (trace) {
653 System.err.println("Warning: passing argument as-is " + a);
654 System.err.print(e);
655 }
656 }
657 } else {
658 out.add(a.arg);
659 }
660 }
661 String[] oarray = new String[out.size()];
662 out.toArray(oarray);
663
664 if (trace) {
665 System.err.println("Expanded arguments:");
666 for (String x : oarray) {
667 System.err.println(x);
668 }
669 }
670 return oarray;
671 }
672
673 /* duplicate of the native StdArg struct */
674 private static class StdArg {
675 final String arg;
676 final boolean needsExpansion;
677 StdArg(String arg, boolean expand) {
678 this.arg = arg;
679 this.needsExpansion = expand;
680 }
681 // protocol: first char indicates whether expansion is required
682 // 'T' = true ; needs expansion
683 // 'F' = false; needs no expansion
684 StdArg(String in) {
685 this.arg = in.substring(1);
686 needsExpansion = in.charAt(0) == 'T';
687 }
688 public String toString() {
689 return "StdArg{" + "arg=" + arg + ", needsExpansion=" + needsExpansion + '}';
690 }
691 }
692
693 static final class FXHelper {
694
695 private static final String JAVAFX_LAUNCHER_CLASS_NAME =
696 "com.sun.javafx.application.LauncherImpl";
697
698 /*
699 * The launch method used to invoke the JavaFX launcher. These must
700 * match the strings used in the launchApplication method.
701 *
702 * Command line JavaFX-App-Class Launch mode FX Launch mode
703 * java -cp fxapp.jar FXClass N/A LM_CLASS "LM_CLASS"
704 * java -cp somedir FXClass N/A LM_CLASS "LM_CLASS"
705 * java -jar fxapp.jar Present LM_JAR "LM_JAR"
706 * java -jar fxapp.jar Not Present LM_JAR "LM_JAR"
707 */
708 private static final String JAVAFX_LAUNCH_MODE_CLASS = "LM_CLASS";
709 private static final String JAVAFX_LAUNCH_MODE_JAR = "LM_JAR";
710
711 /*
712 * FX application launcher and launch method, so we can launch
713 * applications with no main method.
714 */
715 private static String fxLaunchName = null;
716 private static String fxLaunchMode = null;
717
718 private static Class<?> fxLauncherClass = null;
719 private static Method fxLauncherMethod = null;
720
721 /*
722 * Set the launch params according to what was passed to LauncherHelper
723 * so we can use the same launch mode for FX. Abort if there is any
724 * issue with loading the FX runtime or with the launcher method.
725 */
726 private static void setFXLaunchParameters(String what, int mode) {
727 // Check for the FX launcher classes
728 try {
729 fxLauncherClass = scloader.loadClass(JAVAFX_LAUNCHER_CLASS_NAME);
730 /*
731 * signature must be:
732 * public static void launchApplication(String launchName,
733 * String launchMode, String[] args);
734 */
735 fxLauncherMethod = fxLauncherClass.getMethod("launchApplication",
736 String.class, String.class, String[].class);
737
738 // verify launcher signature as we do when validating the main method
739 int mod = fxLauncherMethod.getModifiers();
740 if (!Modifier.isStatic(mod)) {
741 abort(null, "java.launcher.javafx.error1");
742 }
743 if (fxLauncherMethod.getReturnType() != java.lang.Void.TYPE) {
744 abort(null, "java.launcher.javafx.error1");
745 }
746 } catch (ClassNotFoundException | NoSuchMethodException ex) {
747 abort(ex, "java.launcher.cls.error5", ex);
748 }
749
750 fxLaunchName = what;
751 switch (mode) {
752 case LM_CLASS:
753 fxLaunchMode = JAVAFX_LAUNCH_MODE_CLASS;
754 break;
755 case LM_JAR:
756 fxLaunchMode = JAVAFX_LAUNCH_MODE_JAR;
757 break;
758 default:
759 // should not have gotten this far...
760 throw new InternalError(mode + ": Unknown launch mode");
761 }
762 }
763
764 public static void main(String... args) throws Exception {
765 if (fxLauncherMethod == null
766 || fxLaunchMode == null
767 || fxLaunchName == null) {
768 throw new RuntimeException("Invalid JavaFX launch parameters");
769 }
770 // launch appClass via fxLauncherMethod
771 fxLauncherMethod.invoke(null,
772 new Object[] {fxLaunchName, fxLaunchMode, args});
773 }
774 }
775 }