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root/jsr166/jsr166/src/test/tck/JSR166TestCase.java

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.61 by jsr166, Mon Oct 11 03:54:10 2010 UTC vs.
Revision 1.95 by jsr166, Mon Jan 21 19:43:52 2013 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	+	import java.io.ByteArrayInputStream;
11	+	import java.io.ByteArrayOutputStream;
12	+	import java.io.ObjectInputStream;
13	+	import java.io.ObjectOutputStream;
14	+	import java.util.ArrayList;
15	+	import java.util.Arrays;
16	+	import java.util.Date;
17	+	import java.util.Enumeration;
18	+	import java.util.List;
19	+	import java.util.NoSuchElementException;
20		import java.util.PropertyPermission;
21		import java.util.concurrent.*;
22	+	import java.util.concurrent.atomic.AtomicBoolean;
23		import java.util.concurrent.atomic.AtomicReference;
24		import static java.util.concurrent.TimeUnit.MILLISECONDS;
25	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
26		import java.security.CodeSource;
27		import java.security.Permission;
28		import java.security.PermissionCollection;
#	Line 60 | Line 72 | import java.security.SecurityPermission;
72		*
73		* </ol>
74		*
75	<	* <p> <b>Other notes</b>
75	>	* <p><b>Other notes</b>
76		* <ul>
77		*
78		* <li> Usually, there is one testcase method per JSR166 method
#	Line 96 | Line 108 | public class JSR166TestCase extends Test
108		private static final boolean useSecurityManager =
109		Boolean.getBoolean("jsr166.useSecurityManager");
110
111	+	protected static final boolean expensiveTests =
112	+	Boolean.getBoolean("jsr166.expensiveTests");
113	+
114		/**
115		* If true, report on stdout all "slow" tests, that is, ones that
116		* take more than profileThreshold milliseconds to execute.
#	Line 128 | Line 143 | public class JSR166TestCase extends Test
143		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
144		}
145		}
146	<
146	>
147		/**
148	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
148	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
149	>	* Optional command line arg provides the number of iterations to
150	>	* repeat running the tests.
151		*/
152		public static void main(String[] args) {
153		if (useSecurityManager) {
#	Line 248 | Line 265 | public class JSR166TestCase extends Test
265		return 50;
266		}
267
251	–
268		/**
269		* Sets delays as multiples of SHORT_DELAY.
270		*/
#	Line 256 | Line 272 | public class JSR166TestCase extends Test
272		SHORT_DELAY_MS = getShortDelay();
273		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
274		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
275	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
275	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
276	>	}
277	>
278	>	/**
279	>	* Returns a timeout in milliseconds to be used in tests that
280	>	* verify that operations block or time out.
281	>	*/
282	>	long timeoutMillis() {
283	>	return SHORT_DELAY_MS / 4;
284	>	}
285	>
286	>	/**
287	>	* Returns a new Date instance representing a time delayMillis
288	>	* milliseconds in the future.
289	>	*/
290	>	Date delayedDate(long delayMillis) {
291	>	return new Date(System.currentTimeMillis() + delayMillis);
292		}
293
294		/**
#	Line 280 | Line 312 | public class JSR166TestCase extends Test
312		}
313
314		/**
315	+	* Extra checks that get done for all test cases.
316	+	*
317		* Triggers test case failure if any thread assertions have failed,
318		* by rethrowing, in the test harness thread, any exception recorded
319		* earlier by threadRecordFailure.
320	+	*
321	+	* Triggers test case failure if interrupt status is set in the main thread.
322		*/
323		public void tearDown() throws Exception {
324	<	Throwable t = threadFailure.get();
324	>	Throwable t = threadFailure.getAndSet(null);
325		if (t != null) {
326		if (t instanceof Error)
327		throw (Error) t;
#	Line 300 | Line 336 | public class JSR166TestCase extends Test
336		throw afe;
337		}
338		}
339	+
340	+	if (Thread.interrupted())
341	+	throw new AssertionFailedError("interrupt status set in main thread");
342		}
343
344		/**
#	Line 431 | Line 470 | public class JSR166TestCase extends Test
470		else {
471		AssertionFailedError afe =
472		new AssertionFailedError("unexpected exception: " + t);
473	<	t.initCause(t);
473	>	afe.initCause(t);
474		throw afe;
475		}
476		}
477
478		/**
479	+	* Delays, via Thread.sleep, for the given millisecond delay, but
480	+	* if the sleep is shorter than specified, may re-sleep or yield
481	+	* until time elapses.
482	+	*/
483	+	static void delay(long millis) throws InterruptedException {
484	+	long startTime = System.nanoTime();
485	+	long ns = millis * 1000 * 1000;
486	+	for (;;) {
487	+	if (millis > 0L)
488	+	Thread.sleep(millis);
489	+	else // too short to sleep
490	+	Thread.yield();
491	+	long d = ns - (System.nanoTime() - startTime);
492	+	if (d > 0L)
493	+	millis = d / (1000 * 1000);
494	+	else
495	+	break;
496	+	}
497	+	}
498	+
499	+	/**
500		* Waits out termination of a thread pool or fails doing so.
501		*/
502	<	public void joinPool(ExecutorService exec) {
502	>	void joinPool(ExecutorService exec) {
503		try {
504		exec.shutdown();
505		assertTrue("ExecutorService did not terminate in a timely manner",
506	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
506	>	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
507		} catch (SecurityException ok) {
508		// Allowed in case test doesn't have privs
509		} catch (InterruptedException ie) {
#	Line 451 | Line 511 | public class JSR166TestCase extends Test
511		}
512		}
513
514	+	/**
515	+	* A debugging tool to print all stack traces, as jstack does.
516	+	*/
517	+	void printAllStackTraces() {
518	+	System.err.println(
519	+	Arrays.toString(
520	+	java.lang.management.ManagementFactory.getThreadMXBean()
521	+	.dumpAllThreads(true, true)));
522	+	}
523	+
524	+	/**
525	+	* Checks that thread does not terminate within the default
526	+	* millisecond delay of {@code timeoutMillis()}.
527	+	*/
528	+	void assertThreadStaysAlive(Thread thread) {
529	+	assertThreadStaysAlive(thread, timeoutMillis());
530	+	}
531	+
532	+	/**
533	+	* Checks that thread does not terminate within the given millisecond delay.
534	+	*/
535	+	void assertThreadStaysAlive(Thread thread, long millis) {
536	+	try {
537	+	// No need to optimize the failing case via Thread.join.
538	+	delay(millis);
539	+	assertTrue(thread.isAlive());
540	+	} catch (InterruptedException ie) {
541	+	fail("Unexpected InterruptedException");
542	+	}
543	+	}
544	+
545	+	/**
546	+	* Checks that the threads do not terminate within the default
547	+	* millisecond delay of {@code timeoutMillis()}.
548	+	*/
549	+	void assertThreadsStayAlive(Thread... threads) {
550	+	assertThreadsStayAlive(timeoutMillis(), threads);
551	+	}
552	+
553	+	/**
554	+	* Checks that the threads do not terminate within the given millisecond delay.
555	+	*/
556	+	void assertThreadsStayAlive(long millis, Thread... threads) {
557	+	try {
558	+	// No need to optimize the failing case via Thread.join.
559	+	delay(millis);
560	+	for (Thread thread : threads)
561	+	assertTrue(thread.isAlive());
562	+	} catch (InterruptedException ie) {
563	+	fail("Unexpected InterruptedException");
564	+	}
565	+	}
566	+
567	+	/**
568	+	* Checks that future.get times out, with the default timeout of
569	+	* {@code timeoutMillis()}.
570	+	*/
571	+	void assertFutureTimesOut(Future future) {
572	+	assertFutureTimesOut(future, timeoutMillis());
573	+	}
574	+
575	+	/**
576	+	* Checks that future.get times out, with the given millisecond timeout.
577	+	*/
578	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
579	+	long startTime = System.nanoTime();
580	+	try {
581	+	future.get(timeoutMillis, MILLISECONDS);
582	+	shouldThrow();
583	+	} catch (TimeoutException success) {
584	+	} catch (Exception e) {
585	+	threadUnexpectedException(e);
586	+	} finally { future.cancel(true); }
587	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
588	+	}
589
590		/**
591		* Fails with message "should throw exception".
#	Line 503 | Line 638 | public class JSR166TestCase extends Test
638		SecurityManager sm = System.getSecurityManager();
639		if (sm == null) {
640		r.run();
641	+	}
642	+	runWithSecurityManagerWithPermissions(r, permissions);
643	+	}
644	+
645	+	/**
646	+	* Runs Runnable r with a security policy that permits precisely
647	+	* the specified permissions.  If there is no current security
648	+	* manager, a temporary one is set for the duration of the
649	+	* Runnable.  We require that any security manager permit
650	+	* getPolicy/setPolicy.
651	+	*/
652	+	public void runWithSecurityManagerWithPermissions(Runnable r,
653	+	Permission... permissions) {
654	+	SecurityManager sm = System.getSecurityManager();
655	+	if (sm == null) {
656		Policy savedPolicy = Policy.getPolicy();
657		try {
658		Policy.setPolicy(permissivePolicy());
659		System.setSecurityManager(new SecurityManager());
660	<	runWithPermissions(r, permissions);
660	>	runWithSecurityManagerWithPermissions(r, permissions);
661		} finally {
662		System.setSecurityManager(null);
663		Policy.setPolicy(savedPolicy);
#	Line 555 | Line 705 | public class JSR166TestCase extends Test
705		return perms.implies(p);
706		}
707		public void refresh() {}
708	+	public String toString() {
709	+	List<Permission> ps = new ArrayList<Permission>();
710	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
711	+	ps.add(e.nextElement());
712	+	return "AdjustablePolicy with permissions " + ps;
713	+	}
714		}
715
716		/**
#	Line 582 | Line 738 | public class JSR166TestCase extends Test
738		*/
739		void sleep(long millis) {
740		try {
741	<	Thread.sleep(millis);
741	>	delay(millis);
742		} catch (InterruptedException ie) {
743		AssertionFailedError afe =
744		new AssertionFailedError("Unexpected InterruptedException");
#	Line 592 | Line 748 | public class JSR166TestCase extends Test
748		}
749
750		/**
751	<	* Sleeps until the timeout has elapsed, or interrupted.
752	<	* Does <em>NOT</em> throw InterruptedException.
751	>	* Spin-waits up to the specified number of milliseconds for the given
752	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
753		*/
754	<	void sleepTillInterrupted(long timeoutMillis) {
755	<	try {
756	<	Thread.sleep(timeoutMillis);
757	<	} catch (InterruptedException wakeup) {}
754	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
755	>	long startTime = System.nanoTime();
756	>	for (;;) {
757	>	Thread.State s = thread.getState();
758	>	if (s == Thread.State.BLOCKED ||
759	>	s == Thread.State.WAITING ||
760	>	s == Thread.State.TIMED_WAITING)
761	>	return;
762	>	else if (s == Thread.State.TERMINATED)
763	>	fail("Unexpected thread termination");
764	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
765	>	threadAssertTrue(thread.isAlive());
766	>	return;
767	>	}
768	>	Thread.yield();
769	>	}
770	>	}
771	>
772	>	/**
773	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
774	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
775	>	*/
776	>	void waitForThreadToEnterWaitState(Thread thread) {
777	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
778	>	}
779	>
780	>	/**
781	>	* Returns the number of milliseconds since time given by
782	>	* startNanoTime, which must have been previously returned from a
783	>	* call to {@link System.nanoTime()}.
784	>	*/
785	>	long millisElapsedSince(long startNanoTime) {
786	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
787		}
788
789		/**
#	Line 622 | Line 807 | public class JSR166TestCase extends Test
807		} catch (InterruptedException ie) {
808		threadUnexpectedException(ie);
809		} finally {
810	<	if (t.isAlive()) {
810	>	if (t.getState() != Thread.State.TERMINATED) {
811		t.interrupt();
812		fail("Test timed out");
813		}
814		}
815		}
816
817	+	/**
818	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
819	+	* terminate (using {@link Thread#join(long)}), else interrupts
820	+	* the thread (in the hope that it may terminate later) and fails.
821	+	*/
822	+	void awaitTermination(Thread t) {
823	+	awaitTermination(t, LONG_DELAY_MS);
824	+	}
825	+
826		// Some convenient Runnable classes
827
828		public abstract class CheckedRunnable implements Runnable {
#	Line 691 | Line 885 | public class JSR166TestCase extends Test
885		realRun();
886		threadShouldThrow("InterruptedException");
887		} catch (InterruptedException success) {
888	+	threadAssertFalse(Thread.interrupted());
889		} catch (Throwable t) {
890		threadUnexpectedException(t);
891		}
#	Line 720 | Line 915 | public class JSR166TestCase extends Test
915		threadShouldThrow("InterruptedException");
916		return result;
917		} catch (InterruptedException success) {
918	+	threadAssertFalse(Thread.interrupted());
919		} catch (Throwable t) {
920		threadUnexpectedException(t);
921		}
#	Line 743 | Line 939 | public class JSR166TestCase extends Test
939
940		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
941		return new CheckedCallable<String>() {
942	<	public String realCall() {
942	>	protected String realCall() {
943		try {
944		latch.await();
945		} catch (InterruptedException quittingTime) {}
#	Line 751 | Line 947 | public class JSR166TestCase extends Test
947		}};
948		}
949
950	+	public Runnable awaiter(final CountDownLatch latch) {
951	+	return new CheckedRunnable() {
952	+	public void realRun() throws InterruptedException {
953	+	await(latch);
954	+	}};
955	+	}
956	+
957	+	public void await(CountDownLatch latch) {
958	+	try {
959	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
960	+	} catch (Throwable t) {
961	+	threadUnexpectedException(t);
962	+	}
963	+	}
964	+
965	+	public void await(Semaphore semaphore) {
966	+	try {
967	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
968	+	} catch (Throwable t) {
969	+	threadUnexpectedException(t);
970	+	}
971	+	}
972	+
973	+	//     /**
974	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
975	+	//      */
976	+	//     public void await(AtomicBoolean flag) {
977	+	//         await(flag, LONG_DELAY_MS);
978	+	//     }
979	+
980	+	//     /**
981	+	//      * Spin-waits up to the specified timeout until flag becomes true.
982	+	//      */
983	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
984	+	//         long startTime = System.nanoTime();
985	+	//         while (!flag.get()) {
986	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
987	+	//                 throw new AssertionFailedError("timed out");
988	+	//             Thread.yield();
989	+	//         }
990	+	//     }
991	+
992		public static class NPETask implements Callable<String> {
993		public String call() { throw new NullPointerException(); }
994		}
#	Line 761 | Line 999 | public class JSR166TestCase extends Test
999
1000		public class ShortRunnable extends CheckedRunnable {
1001		protected void realRun() throws Throwable {
1002	<	Thread.sleep(SHORT_DELAY_MS);
1002	>	delay(SHORT_DELAY_MS);
1003		}
1004		}
1005
1006		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1007		protected void realRun() throws InterruptedException {
1008	<	Thread.sleep(SHORT_DELAY_MS);
1008	>	delay(SHORT_DELAY_MS);
1009		}
1010		}
1011
1012		public class SmallRunnable extends CheckedRunnable {
1013		protected void realRun() throws Throwable {
1014	<	Thread.sleep(SMALL_DELAY_MS);
1014	>	delay(SMALL_DELAY_MS);
1015		}
1016		}
1017
1018		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1019		protected void realRun() {
1020		try {
1021	<	Thread.sleep(SMALL_DELAY_MS);
1021	>	delay(SMALL_DELAY_MS);
1022		} catch (InterruptedException ok) {}
1023		}
1024		}
1025
1026		public class SmallCallable extends CheckedCallable {
1027		protected Object realCall() throws InterruptedException {
1028	<	Thread.sleep(SMALL_DELAY_MS);
1028	>	delay(SMALL_DELAY_MS);
1029		return Boolean.TRUE;
1030		}
1031		}
1032
1033		public class MediumRunnable extends CheckedRunnable {
1034		protected void realRun() throws Throwable {
1035	<	Thread.sleep(MEDIUM_DELAY_MS);
1035	>	delay(MEDIUM_DELAY_MS);
1036		}
1037		}
1038
1039		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1040		protected void realRun() throws InterruptedException {
1041	<	Thread.sleep(MEDIUM_DELAY_MS);
1041	>	delay(MEDIUM_DELAY_MS);
1042		}
1043		}
1044
1045	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1046	+	return new CheckedRunnable() {
1047	+	protected void realRun() {
1048	+	try {
1049	+	delay(timeoutMillis);
1050	+	} catch (InterruptedException ok) {}
1051	+	}};
1052	+	}
1053	+
1054		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1055		protected void realRun() {
1056		try {
1057	<	Thread.sleep(MEDIUM_DELAY_MS);
1057	>	delay(MEDIUM_DELAY_MS);
1058		} catch (InterruptedException ok) {}
1059		}
1060		}
#	Line 815 | Line 1062 | public class JSR166TestCase extends Test
1062		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1063		protected void realRun() {
1064		try {
1065	<	Thread.sleep(LONG_DELAY_MS);
1065	>	delay(LONG_DELAY_MS);
1066		} catch (InterruptedException ok) {}
1067		}
1068		}
#	Line 839 | Line 1086 | public class JSR166TestCase extends Test
1086		public boolean isDone() { return done; }
1087		public void run() {
1088		try {
1089	<	Thread.sleep(timeoutMillis);
1089	>	delay(timeoutMillis);
1090		done = true;
1091		} catch (InterruptedException ok) {}
1092		}
#	Line 850 | Line 1097 | public class JSR166TestCase extends Test
1097		public volatile boolean done = false;
1098		public void run() {
1099		try {
1100	<	Thread.sleep(SHORT_DELAY_MS);
1100	>	delay(SHORT_DELAY_MS);
1101		done = true;
1102		} catch (InterruptedException ok) {}
1103		}
#	Line 860 | Line 1107 | public class JSR166TestCase extends Test
1107		public volatile boolean done = false;
1108		public void run() {
1109		try {
1110	<	Thread.sleep(SMALL_DELAY_MS);
1110	>	delay(SMALL_DELAY_MS);
1111		done = true;
1112		} catch (InterruptedException ok) {}
1113		}
#	Line 870 | Line 1117 | public class JSR166TestCase extends Test
1117		public volatile boolean done = false;
1118		public void run() {
1119		try {
1120	<	Thread.sleep(MEDIUM_DELAY_MS);
1120	>	delay(MEDIUM_DELAY_MS);
1121		done = true;
1122		} catch (InterruptedException ok) {}
1123		}
#	Line 880 | Line 1127 | public class JSR166TestCase extends Test
1127		public volatile boolean done = false;
1128		public void run() {
1129		try {
1130	<	Thread.sleep(LONG_DELAY_MS);
1130	>	delay(LONG_DELAY_MS);
1131		done = true;
1132		} catch (InterruptedException ok) {}
1133		}
#	Line 897 | Line 1144 | public class JSR166TestCase extends Test
1144		public volatile boolean done = false;
1145		public Object call() {
1146		try {
1147	<	Thread.sleep(SMALL_DELAY_MS);
1147	>	delay(SMALL_DELAY_MS);
1148		done = true;
1149		} catch (InterruptedException ok) {}
1150		return Boolean.TRUE;
#	Line 944 | Line 1191 | public class JSR166TestCase extends Test
1191		}
1192
1193		/**
1194	<	* A CyclicBarrier that fails with AssertionFailedErrors instead
1195	<	* of throwing checked exceptions.
1194	>	* A CyclicBarrier that uses timed await and fails with
1195	>	* AssertionFailedErrors instead of throwing checked exceptions.
1196		*/
1197		public class CheckedBarrier extends CyclicBarrier {
1198		public CheckedBarrier(int parties) { super(parties); }
1199
1200		public int await() {
1201		try {
1202	<	return super.await();
1202	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1203	>	} catch (TimeoutException e) {
1204	>	throw new AssertionFailedError("timed out");
1205		} catch (Exception e) {
1206		AssertionFailedError afe =
1207		new AssertionFailedError("Unexpected exception: " + e);
#	Line 962 | Line 1211 | public class JSR166TestCase extends Test
1211		}
1212		}
1213
1214	+	void checkEmpty(BlockingQueue q) {
1215	+	try {
1216	+	assertTrue(q.isEmpty());
1217	+	assertEquals(0, q.size());
1218	+	assertNull(q.peek());
1219	+	assertNull(q.poll());
1220	+	assertNull(q.poll(0, MILLISECONDS));
1221	+	assertEquals(q.toString(), "[]");
1222	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1223	+	assertFalse(q.iterator().hasNext());
1224	+	try {
1225	+	q.element();
1226	+	shouldThrow();
1227	+	} catch (NoSuchElementException success) {}
1228	+	try {
1229	+	q.iterator().next();
1230	+	shouldThrow();
1231	+	} catch (NoSuchElementException success) {}
1232	+	try {
1233	+	q.remove();
1234	+	shouldThrow();
1235	+	} catch (NoSuchElementException success) {}
1236	+	} catch (InterruptedException ie) {
1237	+	threadUnexpectedException(ie);
1238	+	}
1239	+	}
1240	+
1241	+	void assertSerialEquals(Object x, Object y) {
1242	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1243	+	}
1244	+
1245	+	void assertNotSerialEquals(Object x, Object y) {
1246	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1247	+	}
1248	+
1249	+	byte[] serialBytes(Object o) {
1250	+	try {
1251	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1252	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1253	+	oos.writeObject(o);
1254	+	oos.flush();
1255	+	oos.close();
1256	+	return bos.toByteArray();
1257	+	} catch (Throwable t) {
1258	+	threadUnexpectedException(t);
1259	+	return new byte[0];
1260	+	}
1261	+	}
1262	+
1263	+	@SuppressWarnings("unchecked")
1264	+	<T> T serialClone(T o) {
1265	+	try {
1266	+	ObjectInputStream ois = new ObjectInputStream
1267	+	(new ByteArrayInputStream(serialBytes(o)));
1268	+	T clone = (T) ois.readObject();
1269	+	assertSame(o.getClass(), clone.getClass());
1270	+	return clone;
1271	+	} catch (Throwable t) {
1272	+	threadUnexpectedException(t);
1273	+	return null;
1274	+	}
1275	+	}
1276		}

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