/*

 * Copyright 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 * @test

 * @bug 6464365

 * @summary Test state transitions; check protected methods are called

 * @author Martin Buchholz

 */

import java.util.*;

import java.util.concurrent.*;

import java.util.concurrent.atomic.*;

public class Customized {

    static final AtomicLong doneCount = new AtomicLong(0);

    static final AtomicLong setCount = new AtomicLong(0);

    static final AtomicLong setExceptionCount = new AtomicLong(0);

    static void equal(long expected, AtomicLong actual) {

        equal(expected, actual.get());

    }

    static void equalCounts(long x, long y, long z) {

        equal(x, doneCount);

        equal(y, setCount);

        equal(z, setExceptionCount);

    }

    static class MyFutureTask<V> extends FutureTask<V> {

        MyFutureTask(Runnable r, V result) { super(r, result); }

        protected void done() {

            doneCount.getAndIncrement();

            super.done();

        }

        protected void set(V v) {

            setCount.getAndIncrement();

            super.set(v);

        }

        protected void setException(Throwable t) {

            setExceptionCount.getAndIncrement();

            super.setException(t);

        }

        public boolean runAndReset() {

            return super.runAndReset();

        }

    }

    static <V> void checkReady(final FutureTask<V> task) {

        check(! task.isDone());

        check(! task.isCancelled());

        THROWS(TimeoutException.class,

               new Fun(){void f() throws Throwable {

                       task.get(0L, TimeUnit.SECONDS); }});

    }

    static <V> void checkDone(final FutureTask<V> task) {

        try {

            check(task.isDone());

            check(! task.isCancelled());

            check(task.get() != null);

        } catch (Throwable t) { unexpected(t); }

    }

    static <V> void checkCancelled(final FutureTask<V> task) {

        check(task.isDone());

        check(task.isCancelled());

        THROWS(CancellationException.class,

           new Fun(){void f() throws Throwable {

               task.get(0L, TimeUnit.SECONDS); }},

           new Fun(){void f() throws Throwable {

               task.get(); }});

    }

    static <V> void checkThrew(final FutureTask<V> task) {

        check(task.isDone());

        check(! task.isCancelled());

        THROWS(ExecutionException.class,

           new Fun(){void f() throws Throwable {

               task.get(0L, TimeUnit.SECONDS); }},

           new Fun(){void f() throws Throwable {

               task.get(); }});

    }

    static <V> void cancel(FutureTask<V> task, boolean mayInterruptIfRunning) {

        task.cancel(mayInterruptIfRunning);

        checkCancelled(task);

    }

    static <V> void run(FutureTask<V> task) {

        boolean isCancelled = task.isCancelled();

        task.run();

        check(task.isDone());

        equal(isCancelled, task.isCancelled());

    }

    static void realMain(String[] args) throws Throwable {

        final Runnable nop = new Runnable() {

                public void run() {}};

        final Runnable bad = new Runnable() {

                public void run() { throw new Error(); }};

        try {

            final MyFutureTask<Long> task = new MyFutureTask<Long>(nop, 42L);

            checkReady(task);

            equalCounts(0,0,0);

            check(task.runAndReset());

            checkReady(task);

            equalCounts(0,0,0);

            run(task);

            checkDone(task);

            equalCounts(1,1,0);

            equal(42L, task.get());

            run(task);

            checkDone(task);

            equalCounts(1,1,0);

            equal(42L, task.get());

        } catch (Throwable t) { unexpected(t); }

        try {

            final MyFutureTask<Long> task = new MyFutureTask<Long>(nop, 42L);

            cancel(task, false);

            equalCounts(2,1,0);

            cancel(task, false);

            equalCounts(2,1,0);

            run(task);

            equalCounts(2,1,0);

            check(! task.runAndReset());

        } catch (Throwable t) { unexpected(t); }

        try {

            final MyFutureTask<Long> task = new MyFutureTask<Long>(bad, 42L);

            checkReady(task);

            run(task);

            checkThrew(task);

            equalCounts(3,1,1);

            run(task);

            equalCounts(3,1,1);

        } catch (Throwable t) { unexpected(t); }

        try {

            final MyFutureTask<Long> task = new MyFutureTask<Long>(nop, 42L);

            checkReady(task);

            task.set(99L);

            checkDone(task);

            equalCounts(4,2,1);

            run(task);

            equalCounts(4,2,1);

            task.setException(new Throwable());

            checkDone(task);

            equalCounts(4,2,2);

        } catch (Throwable t) { unexpected(t); }

        try {

            final MyFutureTask<Long> task = new MyFutureTask<Long>(nop, 42L);

            checkReady(task);

            task.setException(new Throwable());

            checkThrew(task);

            equalCounts(5,2,3);

            run(task);

            equalCounts(5,2,3);

            task.set(99L);

            checkThrew(task);

            equalCounts(5,3,3);

        } catch (Throwable t) { unexpected(t); }

        System.out.printf("doneCount=%d%n", doneCount.get());

        System.out.printf("setCount=%d%n", setCount.get());

        System.out.printf("setExceptionCount=%d%n", setExceptionCount.get());

    }

    //--------------------- Infrastructure ---------------------------

    static volatile int passed = 0, failed = 0;

    static void pass() {passed++;}

    static void fail() {failed++; Thread.dumpStack();}

    static void fail(String msg) {System.out.println(msg); fail();}

    static void unexpected(Throwable t) {failed++; t.printStackTrace();}

    static void check(boolean cond) {if (cond) pass(); else fail();}

    static 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 {

        try {realMain(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");}

    private static abstract class Fun {abstract void f() throws Throwable;}

    static void THROWS(Class<? extends Throwable> k, Fun... fs) {

        for (Fun f : fs)

            try { f.f(); fail("Expected " + k.getName() + " not thrown"); }

            catch (Throwable t) {

                if (k.isAssignableFrom(t.getClass())) pass();

                else unexpected(t);}}

}