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