1 /*
2 * Copyright (c) 1995, 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.applet;
27
28 import java.lang.NullPointerException;
29 import java.net.URL;
30 import java.net.URLClassLoader;
31 import java.net.SocketPermission;
32 import java.net.URLConnection;
33 import java.net.MalformedURLException;
34 import java.net.InetAddress;
35 import java.net.UnknownHostException;
36 import java.io.File;
37 import java.io.FilePermission;
38 import java.io.IOException;
39 import java.io.BufferedInputStream;
40 import java.io.InputStream;
41 import java.util.Enumeration;
42 import java.util.HashMap;
43 import java.util.NoSuchElementException;
44 import java.security.AccessController;
45 import java.security.AccessControlContext;
46 import java.security.PrivilegedAction;
47 import java.security.PrivilegedExceptionAction;
48 import java.security.PrivilegedActionException;
49 import java.security.CodeSource;
50 import java.security.Permission;
51 import java.security.PermissionCollection;
52 import sun.awt.AppContext;
53 import sun.awt.SunToolkit;
54 import sun.misc.IOUtils;
55 import sun.misc.ManagedLocalsThread;
56 import sun.net.www.ParseUtil;
57 import sun.security.util.SecurityConstants;
58
59 /**
60 * This class defines the class loader for loading applet classes and
61 * resources. It extends URLClassLoader to search the applet code base
62 * for the class or resource after checking any loaded JAR files.
63 */
64 public class AppletClassLoader extends URLClassLoader {
65 private URL base; /* applet code base URL */
66 private CodeSource codesource; /* codesource for the base URL */
67 private AccessControlContext acc;
68 private boolean exceptionStatus = false;
69
70 private final Object threadGroupSynchronizer = new Object();
71 private final Object grabReleaseSynchronizer = new Object();
72
73 private boolean codebaseLookup = true;
74 private volatile boolean allowRecursiveDirectoryRead = true;
75
76 /*
77 * Creates a new AppletClassLoader for the specified base URL.
78 */
79 protected AppletClassLoader(URL base) {
80 super(new URL[0]);
81 this.base = base;
82 this.codesource =
83 new CodeSource(base, (java.security.cert.Certificate[]) null);
84 acc = AccessController.getContext();
85 }
86
87 public void disableRecursiveDirectoryRead() {
88 allowRecursiveDirectoryRead = false;
89 }
90
91
92 /**
93 * Set the codebase lookup flag.
94 */
95 void setCodebaseLookup(boolean codebaseLookup) {
96 this.codebaseLookup = codebaseLookup;
97 }
98
99 /*
100 * Returns the applet code base URL.
101 */
102 URL getBaseURL() {
103 return base;
104 }
105
106 /*
107 * Returns the URLs used for loading classes and resources.
108 */
109 public URL[] getURLs() {
110 URL[] jars = super.getURLs();
111 URL[] urls = new URL[jars.length + 1];
112 System.arraycopy(jars, 0, urls, 0, jars.length);
113 urls[urls.length - 1] = base;
114 return urls;
115 }
116
117 /*
118 * Adds the specified JAR file to the search path of loaded JAR files.
119 * Changed modifier to protected in order to be able to overwrite addJar()
120 * in PluginClassLoader.java
121 */
122 protected void addJar(String name) throws IOException {
123 URL url;
124 try {
125 url = new URL(base, name);
126 } catch (MalformedURLException e) {
127 throw new IllegalArgumentException("name");
128 }
129 addURL(url);
130 // DEBUG
131 //URL[] urls = getURLs();
132 //for (int i = 0; i < urls.length; i++) {
133 // System.out.println("url[" + i + "] = " + urls[i]);
134 //}
135 }
136
137 /*
138 * Override loadClass so that class loading errors can be caught in
139 * order to print better error messages.
140 */
141 public synchronized Class<?> loadClass(String name, boolean resolve)
142 throws ClassNotFoundException
143 {
144 // First check if we have permission to access the package. This
145 // should go away once we've added support for exported packages.
146 int i = name.lastIndexOf('.');
147 if (i != -1) {
148 SecurityManager sm = System.getSecurityManager();
149 if (sm != null)
150 sm.checkPackageAccess(name.substring(0, i));
151 }
152 try {
153 return super.loadClass(name, resolve);
154 } catch (ClassNotFoundException e) {
155 //printError(name, e.getException());
156 throw e;
157 } catch (RuntimeException e) {
158 //printError(name, e);
159 throw e;
160 } catch (Error e) {
161 //printError(name, e);
162 throw e;
163 }
164 }
165
166 /*
167 * Finds the applet class with the specified name. First searches
168 * loaded JAR files then the applet code base for the class.
169 */
170 protected Class<?> findClass(String name) throws ClassNotFoundException {
171
172 int index = name.indexOf(';');
173 String cookie = "";
174 if(index != -1) {
175 cookie = name.substring(index, name.length());
176 name = name.substring(0, index);
177 }
178
179 // check loaded JAR files
180 try {
181 return super.findClass(name);
182 } catch (ClassNotFoundException e) {
183 }
184
185 // Otherwise, try loading the class from the code base URL
186
187 // 4668479: Option to turn off codebase lookup in AppletClassLoader
188 // during resource requests. [stanley.ho]
189 if (codebaseLookup == false)
190 throw new ClassNotFoundException(name);
191
192 // final String path = name.replace('.', '/').concat(".class").concat(cookie);
193 String encodedName = ParseUtil.encodePath(name.replace('.', '/'), false);
194 final String path = (new StringBuffer(encodedName)).append(".class").append(cookie).toString();
195 try {
196 byte[] b = AccessController.doPrivileged(
197 new PrivilegedExceptionAction<byte[]>() {
198 public byte[] run() throws IOException {
199 try {
200 URL finalURL = new URL(base, path);
201
202 // Make sure the codebase won't be modified
203 if (base.getProtocol().equals(finalURL.getProtocol()) &&
204 base.getHost().equals(finalURL.getHost()) &&
205 base.getPort() == finalURL.getPort()) {
206 return getBytes(finalURL);
207 }
208 else {
209 return null;
210 }
211 } catch (Exception e) {
212 return null;
213 }
214 }
215 }, acc);
216
217 if (b != null) {
218 return defineClass(name, b, 0, b.length, codesource);
219 } else {
220 throw new ClassNotFoundException(name);
221 }
222 } catch (PrivilegedActionException e) {
223 throw new ClassNotFoundException(name, e.getException());
224 }
225 }
226
227 /**
228 * Returns the permissions for the given codesource object.
229 * The implementation of this method first calls super.getPermissions,
230 * to get the permissions
231 * granted by the super class, and then adds additional permissions
232 * based on the URL of the codesource.
233 * <p>
234 * If the protocol is "file"
235 * and the path specifies a file, permission is granted to read all files
236 * and (recursively) all files and subdirectories contained in
237 * that directory. This is so applets with a codebase of
238 * file:/blah/some.jar can read in file:/blah/, which is needed to
239 * be backward compatible. We also add permission to connect back to
240 * the "localhost".
241 *
242 * @param codesource the codesource
243 * @throws NullPointerException if {@code codesource} is {@code null}.
244 * @return the permissions granted to the codesource
245 */
246 protected PermissionCollection getPermissions(CodeSource codesource)
247 {
248 final PermissionCollection perms = super.getPermissions(codesource);
249
250 URL url = codesource.getLocation();
251
252 String path = null;
253 Permission p;
254
255 try {
256 p = url.openConnection().getPermission();
257 } catch (java.io.IOException ioe) {
258 p = null;
259 }
260
261 if (p instanceof FilePermission) {
262 path = p.getName();
263 } else if ((p == null) && (url.getProtocol().equals("file"))) {
264 path = url.getFile().replace('/', File.separatorChar);
265 path = ParseUtil.decode(path);
266 }
267
268 if (path != null) {
269 final String rawPath = path;
270 if (!path.endsWith(File.separator)) {
271 int endIndex = path.lastIndexOf(File.separatorChar);
272 if (endIndex != -1) {
273 path = path.substring(0, endIndex + 1) + "-";
274 perms.add(new FilePermission(path,
275 SecurityConstants.FILE_READ_ACTION));
276 }
277 }
278 final File f = new File(rawPath);
279 final boolean isDirectory = f.isDirectory();
280 // grant codebase recursive read permission
281 // this should only be granted to non-UNC file URL codebase and
282 // the codesource path must either be a directory, or a file
283 // that ends with .jar or .zip
284 if (allowRecursiveDirectoryRead && (isDirectory ||
285 rawPath.toLowerCase().endsWith(".jar") ||
286 rawPath.toLowerCase().endsWith(".zip"))) {
287
288 Permission bperm;
289 try {
290 bperm = base.openConnection().getPermission();
291 } catch (java.io.IOException ioe) {
292 bperm = null;
293 }
294 if (bperm instanceof FilePermission) {
295 String bpath = bperm.getName();
296 if (bpath.endsWith(File.separator)) {
297 bpath += "-";
298 }
299 perms.add(new FilePermission(bpath,
300 SecurityConstants.FILE_READ_ACTION));
301 } else if ((bperm == null) && (base.getProtocol().equals("file"))) {
302 String bpath = base.getFile().replace('/', File.separatorChar);
303 bpath = ParseUtil.decode(bpath);
304 if (bpath.endsWith(File.separator)) {
305 bpath += "-";
306 }
307 perms.add(new FilePermission(bpath, SecurityConstants.FILE_READ_ACTION));
308 }
309
310 }
311 }
312 return perms;
313 }
314
315 /*
316 * Returns the contents of the specified URL as an array of bytes.
317 */
318 private static byte[] getBytes(URL url) throws IOException {
319 URLConnection uc = url.openConnection();
320 if (uc instanceof java.net.HttpURLConnection) {
321 java.net.HttpURLConnection huc = (java.net.HttpURLConnection) uc;
322 int code = huc.getResponseCode();
323 if (code >= java.net.HttpURLConnection.HTTP_BAD_REQUEST) {
324 throw new IOException("open HTTP connection failed.");
325 }
326 }
327 int len = uc.getContentLength();
328
329 // Fixed #4507227: Slow performance to load
330 // class and resources. [stanleyh]
331 //
332 // Use buffered input stream [stanleyh]
333 InputStream in = new BufferedInputStream(uc.getInputStream());
334
335 byte[] b;
336 try {
337 b = IOUtils.readFully(in, len, true);
338 } finally {
339 in.close();
340 }
341 return b;
342 }
343
344 // Object for synchronization around getResourceAsStream()
345 private Object syncResourceAsStream = new Object();
346 private Object syncResourceAsStreamFromJar = new Object();
347
348 // Flag to indicate getResourceAsStream() is in call
349 private boolean resourceAsStreamInCall = false;
350 private boolean resourceAsStreamFromJarInCall = false;
351
352 /**
353 * Returns an input stream for reading the specified resource.
354 *
355 * The search order is described in the documentation for {@link
356 * #getResource(String)}.<p>
357 *
358 * @param name the resource name
359 * @return an input stream for reading the resource, or <code>null</code>
360 * if the resource could not be found
361 * @since 1.1
362 */
363 public InputStream getResourceAsStream(String name)
364 {
365
366 if (name == null) {
367 throw new NullPointerException("name");
368 }
369
370 try
371 {
372 InputStream is = null;
373
374 // Fixed #4507227: Slow performance to load
375 // class and resources. [stanleyh]
376 //
377 // The following is used to avoid calling
378 // AppletClassLoader.findResource() in
379 // super.getResourceAsStream(). Otherwise,
380 // unnecessary connection will be made.
381 //
382 synchronized(syncResourceAsStream)
383 {
384 resourceAsStreamInCall = true;
385
386 // Call super class
387 is = super.getResourceAsStream(name);
388
389 resourceAsStreamInCall = false;
390 }
391
392 // 4668479: Option to turn off codebase lookup in AppletClassLoader
393 // during resource requests. [stanley.ho]
394 if (codebaseLookup == true && is == null)
395 {
396 // If resource cannot be obtained,
397 // try to download it from codebase
398 URL url = new URL(base, ParseUtil.encodePath(name, false));
399 is = url.openStream();
400 }
401
402 return is;
403 }
404 catch (Exception e)
405 {
406 return null;
407 }
408 }
409
410
411 /**
412 * Returns an input stream for reading the specified resource from the
413 * the loaded jar files.
414 *
415 * The search order is described in the documentation for {@link
416 * #getResource(String)}.<p>
417 *
418 * @param name the resource name
419 * @return an input stream for reading the resource, or <code>null</code>
420 * if the resource could not be found
421 * @since 1.1
422 */
423 public InputStream getResourceAsStreamFromJar(String name) {
424
425 if (name == null) {
426 throw new NullPointerException("name");
427 }
428
429 try {
430 InputStream is = null;
431 synchronized(syncResourceAsStreamFromJar) {
432 resourceAsStreamFromJarInCall = true;
433 // Call super class
434 is = super.getResourceAsStream(name);
435 resourceAsStreamFromJarInCall = false;
436 }
437
438 return is;
439 } catch (Exception e) {
440 return null;
441 }
442 }
443
444
445 /*
446 * Finds the applet resource with the specified name. First checks
447 * loaded JAR files then the applet code base for the resource.
448 */
449 public URL findResource(String name) {
450 // check loaded JAR files
451 URL url = super.findResource(name);
452
453 // 6215746: Disable META-INF/* lookup from codebase in
454 // applet/plugin classloader. [stanley.ho]
455 if (name.startsWith("META-INF/"))
456 return url;
457
458 // 4668479: Option to turn off codebase lookup in AppletClassLoader
459 // during resource requests. [stanley.ho]
460 if (codebaseLookup == false)
461 return url;
462
463 if (url == null)
464 {
465 //#4805170, if it is a call from Applet.getImage()
466 //we should check for the image only in the archives
467 boolean insideGetResourceAsStreamFromJar = false;
468 synchronized(syncResourceAsStreamFromJar) {
469 insideGetResourceAsStreamFromJar = resourceAsStreamFromJarInCall;
470 }
471
472 if (insideGetResourceAsStreamFromJar) {
473 return null;
474 }
475
476 // Fixed #4507227: Slow performance to load
477 // class and resources. [stanleyh]
478 //
479 // Check if getResourceAsStream is called.
480 //
481 boolean insideGetResourceAsStream = false;
482
483 synchronized(syncResourceAsStream)
484 {
485 insideGetResourceAsStream = resourceAsStreamInCall;
486 }
487
488 // If getResourceAsStream is called, don't
489 // trigger the following code. Otherwise,
490 // unnecessary connection will be made.
491 //
492 if (insideGetResourceAsStream == false)
493 {
494 // otherwise, try the code base
495 try {
496 url = new URL(base, ParseUtil.encodePath(name, false));
497 // check if resource exists
498 if(!resourceExists(url))
499 url = null;
500 } catch (Exception e) {
501 // all exceptions, including security exceptions, are caught
502 url = null;
503 }
504 }
505 }
506 return url;
507 }
508
509
510 private boolean resourceExists(URL url) {
511 // Check if the resource exists.
512 // It almost works to just try to do an openConnection() but
513 // HttpURLConnection will return true on HTTP_BAD_REQUEST
514 // when the requested name ends in ".html", ".htm", and ".txt"
515 // and we want to be able to handle these
516 //
517 // Also, cannot just open a connection for things like FileURLConnection,
518 // because they succeed when connecting to a nonexistent file.
519 // So, in those cases we open and close an input stream.
520 boolean ok = true;
521 try {
522 URLConnection conn = url.openConnection();
523 if (conn instanceof java.net.HttpURLConnection) {
524 java.net.HttpURLConnection hconn =
525 (java.net.HttpURLConnection) conn;
526
527 // To reduce overhead, using http HEAD method instead of GET method
528 hconn.setRequestMethod("HEAD");
529
530 int code = hconn.getResponseCode();
531 if (code == java.net.HttpURLConnection.HTTP_OK) {
532 return true;
533 }
534 if (code >= java.net.HttpURLConnection.HTTP_BAD_REQUEST) {
535 return false;
536 }
537 } else {
538 /**
539 * Fix for #4182052 - stanleyh
540 *
541 * The same connection should be reused to avoid multiple
542 * HTTP connections
543 */
544
545 // our best guess for the other cases
546 InputStream is = conn.getInputStream();
547 is.close();
548 }
549 } catch (Exception ex) {
550 ok = false;
551 }
552 return ok;
553 }
554
555 /*
556 * Returns an enumeration of all the applet resources with the specified
557 * name. First checks loaded JAR files then the applet code base for all
558 * available resources.
559 */
560 @Override
561 public Enumeration<URL> findResources(String name) throws IOException {
562
563 final Enumeration<URL> e = super.findResources(name);
564
565 // 6215746: Disable META-INF/* lookup from codebase in
566 // applet/plugin classloader. [stanley.ho]
567 if (name.startsWith("META-INF/"))
568 return e;
569
570 // 4668479: Option to turn off codebase lookup in AppletClassLoader
571 // during resource requests. [stanley.ho]
572 if (codebaseLookup == false)
573 return e;
574
575 URL u = new URL(base, ParseUtil.encodePath(name, false));
576 if (!resourceExists(u)) {
577 u = null;
578 }
579
580 final URL url = u;
581 return new Enumeration<URL>() {
582 private boolean done;
583 public URL nextElement() {
584 if (!done) {
585 if (e.hasMoreElements()) {
586 return e.nextElement();
587 }
588 done = true;
589 if (url != null) {
590 return url;
591 }
592 }
593 throw new NoSuchElementException();
594 }
595 public boolean hasMoreElements() {
596 return !done && (e.hasMoreElements() || url != null);
597 }
598 };
599 }
600
601 /*
602 * Load and resolve the file specified by the applet tag CODE
603 * attribute. The argument can either be the relative path
604 * of the class file itself or just the name of the class.
605 */
606 Class<?> loadCode(String name) throws ClassNotFoundException {
607 // first convert any '/' or native file separator to .
608 name = name.replace('/', '.');
609 name = name.replace(File.separatorChar, '.');
610
611 // deal with URL rewriting
612 String cookie = null;
613 int index = name.indexOf(';');
614 if(index != -1) {
615 cookie = name.substring(index, name.length());
616 name = name.substring(0, index);
617 }
618
619 // save that name for later
620 String fullName = name;
621 // then strip off any suffixes
622 if (name.endsWith(".class") || name.endsWith(".java")) {
623 name = name.substring(0, name.lastIndexOf('.'));
624 }
625 try {
626 if(cookie != null)
627 name = (new StringBuffer(name)).append(cookie).toString();
628 return loadClass(name);
629 } catch (ClassNotFoundException e) {
630 }
631 // then if it didn't end with .java or .class, or in the
632 // really pathological case of a class named class or java
633 if(cookie != null)
634 fullName = (new StringBuffer(fullName)).append(cookie).toString();
635
636 return loadClass(fullName);
637 }
638
639 /*
640 * The threadgroup that the applets loaded by this classloader live
641 * in. In the sun.* implementation of applets, the security manager's
642 * (AppletSecurity) getThreadGroup returns the thread group of the
643 * first applet on the stack, which is the applet's thread group.
644 */
645 private AppletThreadGroup threadGroup;
646 private AppContext appContext;
647
648 public ThreadGroup getThreadGroup() {
649 synchronized (threadGroupSynchronizer) {
650 if (threadGroup == null || threadGroup.isDestroyed()) {
651 AccessController.doPrivileged(new PrivilegedAction<Object>() {
652 public Object run() {
653 threadGroup = new AppletThreadGroup(base + "-threadGroup");
654 // threadGroup.setDaemon(true);
655 // threadGroup is now destroyed by AppContext.dispose()
656
657 // Create the new AppContext from within a Thread belonging
658 // to the newly created ThreadGroup, and wait for the
659 // creation to complete before returning from this method.
660 AppContextCreator creatorThread = new AppContextCreator(threadGroup);
661
662 // Since this thread will later be used to launch the
663 // applet's AWT-event dispatch thread and we want the applet
664 // code executing the AWT callbacks to use their own class
665 // loader rather than the system class loader, explicitly
666 // set the context class loader to the AppletClassLoader.
667 creatorThread.setContextClassLoader(AppletClassLoader.this);
668
669 creatorThread.start();
670 try {
671 synchronized(creatorThread.syncObject) {
672 while (!creatorThread.created) {
673 creatorThread.syncObject.wait();
674 }
675 }
676 } catch (InterruptedException e) { }
677 appContext = creatorThread.appContext;
678 return null;
679 }
680 });
681 }
682 return threadGroup;
683 }
684 }
685
686 /*
687 * Get the AppContext, if any, corresponding to this AppletClassLoader.
688 */
689 public AppContext getAppContext() {
690 return appContext;
691 }
692
693 int usageCount = 0;
694
695 /**
696 * Grab this AppletClassLoader and its ThreadGroup/AppContext, so they
697 * won't be destroyed.
698 */
699 public void grab() {
700 synchronized(grabReleaseSynchronizer) {
701 usageCount++;
702 }
703 getThreadGroup(); // Make sure ThreadGroup/AppContext exist
704 }
705
706 protected void setExceptionStatus()
707 {
708 exceptionStatus = true;
709 }
710
711 public boolean getExceptionStatus()
712 {
713 return exceptionStatus;
714 }
715
716 /**
717 * Release this AppletClassLoader and its ThreadGroup/AppContext.
718 * If nothing else has grabbed this AppletClassLoader, its ThreadGroup
719 * and AppContext will be destroyed.
720 *
721 * Because this method may destroy the AppletClassLoader's ThreadGroup,
722 * this method should NOT be called from within the AppletClassLoader's
723 * ThreadGroup.
724 *
725 * Changed modifier to protected in order to be able to overwrite this
726 * function in PluginClassLoader.java
727 */
728 protected void release() {
729
730 AppContext tempAppContext = null;
731
732 synchronized(grabReleaseSynchronizer) {
733 if (usageCount > 1) {
734 --usageCount;
735 } else {
736 synchronized(threadGroupSynchronizer) {
737 tempAppContext = resetAppContext();
738 }
739 }
740 }
741
742 // Dispose appContext outside any sync block to
743 // prevent potential deadlock.
744 if (tempAppContext != null) {
745 try {
746 tempAppContext.dispose(); // nuke the world!
747 } catch (IllegalThreadStateException e) { }
748 }
749 }
750
751 /*
752 * reset classloader's AppContext and ThreadGroup
753 * This method is for subclass PluginClassLoader to
754 * reset superclass's AppContext and ThreadGroup but do
755 * not dispose the AppContext. PluginClassLoader does not
756 * use UsageCount to decide whether to dispose AppContext
757 *
758 * @return previous AppContext
759 */
760 protected AppContext resetAppContext() {
761 AppContext tempAppContext = null;
762
763 synchronized(threadGroupSynchronizer) {
764 // Store app context in temp variable
765 tempAppContext = appContext;
766 usageCount = 0;
767 appContext = null;
768 threadGroup = null;
769 }
770 return tempAppContext;
771 }
772
773
774 // Hash map to store applet compatibility info
775 private HashMap<String, Boolean> jdk11AppletInfo = new HashMap<>();
776 private HashMap<String, Boolean> jdk12AppletInfo = new HashMap<>();
777
778 /**
779 * Set applet target level as JDK 1.1.
780 *
781 * @param clazz Applet class.
782 * @param bool true if JDK is targeted for JDK 1.1;
783 * false otherwise.
784 */
785 void setJDK11Target(Class<?> clazz, boolean bool)
786 {
787 jdk11AppletInfo.put(clazz.toString(), Boolean.valueOf(bool));
788 }
789
790 /**
791 * Set applet target level as JDK 1.2.
792 *
793 * @param clazz Applet class.
794 * @param bool true if JDK is targeted for JDK 1.2;
795 * false otherwise.
796 */
797 void setJDK12Target(Class<?> clazz, boolean bool)
798 {
799 jdk12AppletInfo.put(clazz.toString(), Boolean.valueOf(bool));
800 }
801
802 /**
803 * Determine if applet is targeted for JDK 1.1.
804 *
805 * @param applet Applet class.
806 * @return TRUE if applet is targeted for JDK 1.1;
807 * FALSE if applet is not;
808 * null if applet is unknown.
809 */
810 Boolean isJDK11Target(Class<?> clazz)
811 {
812 return jdk11AppletInfo.get(clazz.toString());
813 }
814
815 /**
816 * Determine if applet is targeted for JDK 1.2.
817 *
818 * @param applet Applet class.
819 * @return TRUE if applet is targeted for JDK 1.2;
820 * FALSE if applet is not;
821 * null if applet is unknown.
822 */
823 Boolean isJDK12Target(Class<?> clazz)
824 {
825 return jdk12AppletInfo.get(clazz.toString());
826 }
827
828 private static AppletMessageHandler mh =
829 new AppletMessageHandler("appletclassloader");
830
831 /*
832 * Prints a class loading error message.
833 */
834 private static void printError(String name, Throwable e) {
835 String s = null;
836 if (e == null) {
837 s = mh.getMessage("filenotfound", name);
838 } else if (e instanceof IOException) {
839 s = mh.getMessage("fileioexception", name);
840 } else if (e instanceof ClassFormatError) {
841 s = mh.getMessage("fileformat", name);
842 } else if (e instanceof ThreadDeath) {
843 s = mh.getMessage("filedeath", name);
844 } else if (e instanceof Error) {
845 s = mh.getMessage("fileerror", e.toString(), name);
846 }
847 if (s != null) {
848 System.err.println(s);
849 }
850 }
851 }
852
853 /*
854 * The AppContextCreator class is used to create an AppContext from within
855 * a Thread belonging to the new AppContext's ThreadGroup. To wait for
856 * this operation to complete before continuing, wait for the notifyAll()
857 * operation on the syncObject to occur.
858 */
859 class AppContextCreator extends ManagedLocalsThread {
860 Object syncObject = new Object();
861 AppContext appContext = null;
862 volatile boolean created = false;
863
864 AppContextCreator(ThreadGroup group) {
865 super(group, null, "AppContextCreator");
866 }
867
868 public void run() {
869 appContext = SunToolkit.createNewAppContext();
870 created = true;
871 synchronized(syncObject) {
872 syncObject.notifyAll();
873 }
874 } // run()
875
876 } // class AppContextCreator