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/*
* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 6415572
* @summary Check exceptional behavior in run and done methods
*/
import java.util.concurrent.Callable;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
public class Throw {
static void THROW(final Throwable t) {
if (t != null)
Throw.<RuntimeException>uncheckedThrow(t);
}
Callable<Void> thrower(final Throwable t) {
return new Callable<Void>() { public Void call() {
THROW(t); return null; }};
}
@SuppressWarnings("serial")
private static class DoneError extends Error {}
@SuppressWarnings("serial")
private static class DoneException extends RuntimeException {}
static class MyFutureTask extends FutureTask<Void> {
MyFutureTask(Callable<Void> task) { super(task); }
public boolean runAndReset() { return super.runAndReset(); }
}
MyFutureTask checkTask(final MyFutureTask task) {
check(! task.isCancelled());
check(! task.isDone());
return task;
}
MyFutureTask taskFor(final Throwable callableThrowable,
final Throwable doneThrowable) {
return checkTask(
new MyFutureTask(thrower(callableThrowable)) {
protected void done() { THROW(doneThrowable); }});
}
void test(String[] args) throws Throwable {
final Throwable[] callableThrowables = {
null, new Exception(), new Error(), new RuntimeException() };
final Throwable[] doneThrowables = {
new DoneError(), new DoneException() };
for (final Throwable c : callableThrowables) {
for (final Throwable d : doneThrowables) {
THROWS(d.getClass(),
new F(){void f(){
taskFor(c, d).cancel(false);}},
new F(){void f(){
taskFor(c, d).run();}});
if (c != null)
THROWS(d.getClass(),
new F(){void f(){
taskFor(c, d).runAndReset();}});
}
try {
final MyFutureTask task = taskFor(c, null);
check(task.cancel(false));
THROWS(CancellationException.class,
new F(){void f() throws Throwable { task.get(); }});
} catch (Throwable t) { unexpected(t); }
if (c != null) {
final MyFutureTask task = taskFor(c, null);
task.run();
try {
task.get();
fail("Expected ExecutionException");
} catch (ExecutionException ee) {
equal(c.getClass(), ee.getCause().getClass());
} catch (Throwable t) { unexpected(t); }
}
if (c != null) {
final MyFutureTask task = taskFor(c, null);
task.runAndReset();
try {
task.get();
fail("Expected ExecutionException");
} catch (ExecutionException ee) {
check(c.getClass().isInstance(ee.getCause()));
} catch (Throwable t) { unexpected(t); }
}
}
}
//--------------------- Infrastructure ---------------------------
volatile int passed = 0, failed = 0;
void pass() {passed++;}
void fail() {failed++; Thread.dumpStack();}
void fail(String msg) {System.err.println(msg); fail();}
void unexpected(Throwable t) {failed++; t.printStackTrace();}
void check(boolean cond) {if (cond) pass(); else fail();}
void equal(Object x, Object y) {
if (x == null ? y == null : x.equals(y)) pass();
else fail(x + " not equal to " + y);}
public static void main(String[] args) throws Throwable {
new Throw().instanceMain(args);}
void instanceMain(String[] args) throws Throwable {
try {test(args);} catch (Throwable t) {unexpected(t);}
System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
if (failed > 0) throw new AssertionError("Some tests failed");}
abstract class F {abstract void f() throws Throwable;}
void THROWS(Class<? extends Throwable> k, F... fs) {
for (F f : fs)
try {f.f(); fail("Expected " + k.getName() + " not thrown");}
catch (Throwable t) {
if (k.isAssignableFrom(t.getClass())) pass();
else unexpected(t);}}
@SuppressWarnings("unchecked")
static <T extends Throwable> void uncheckedThrow(Throwable t) throws T {
throw (T)t; // rely on vacuous cast
}
}
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