/*

 * Copyright (c) 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 6552961 6558429

 * @summary Test privilegedCallable, privilegedCallableUsingCurrentClassLoader

 * @run main/othervm PrivilegedCallables

 * @author Martin Buchholz

 */

import java.util.concurrent.*;

import java.util.*;

import java.security.*;

import static java.util.concurrent.Executors.*;

public class PrivilegedCallables {

    Callable<Integer> real;

    final Callable<Integer> realCaller = new Callable<Integer>() {

        public Integer call() throws Exception {

            return real.call(); }};

    final Random rnd = new Random();

    @SuppressWarnings("serial") Throwable[] throwables = {

        new Exception() {},

        new RuntimeException() {},

        new Error() {}

    };

    Throwable randomThrowable() {

        return throwables[rnd.nextInt(throwables.length)];

    }

    //----------------------------------------------------------------

    // A Policy class designed to make permissions fiddling very easy.

    //----------------------------------------------------------------

    static class Policy extends java.security.Policy {

        private Permissions perms;

        public void setPermissions(Permission...permissions) {

            perms = new Permissions();

            for (Permission permission : permissions)

                perms.add(permission);

        }

        public Policy() { setPermissions(/* Nothing */); }

        public PermissionCollection getPermissions(CodeSource cs) {

            return perms;

        }

        public PermissionCollection getPermissions(ProtectionDomain pd) {

            return perms;

        }

        public boolean implies(ProtectionDomain pd, Permission p) {

            return perms.implies(p);

        }

        public void refresh() {}

    }

    void test(String[] args) {

        testPrivileged();

        final Policy policy = new Policy();

        Policy.setPolicy(policy);

        policy.setPermissions(new RuntimePermission("getClassLoader"),

                              new RuntimePermission("setContextClassLoader"),

                              new RuntimePermission("stopThread"));

        System.setSecurityManager(new SecurityManager());

        testPrivileged();

        policy.setPermissions(/* Nothing */);

        THROWS(AccessControlException.class,

               new F() {void f(){ privilegedCallableUsingCurrentClassLoader(realCaller); }},

               new F() {void f(){ privilegedThreadFactory(); }});

        policy.setPermissions(new RuntimePermission("setSecurityManager"));

        System.setSecurityManager(null);

    }

    void testPrivileged() {

        try { test(privilegedCallable(realCaller)); }

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

        try { test(privilegedCallableUsingCurrentClassLoader(realCaller)); }

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

        try { privilegedThreadFactory(); }

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

    }

    void test(final Callable<Integer> c) throws Throwable {

        for (int i = 0; i < 20; i++)

            if (rnd.nextBoolean()) {

                final Throwable t = randomThrowable();

                real = new Callable<Integer>() {

                    @SuppressWarnings("deprecation")

                    public Integer call() throws Exception {

                        Thread.currentThread().stop(t);

                        return null; }};

                try {

                    c.call();

                    fail("Expected exception not thrown");

                } catch (Throwable tt) { check(t == tt); }

            } else {

                final int n = rnd.nextInt();

                real = new Callable<Integer>() {

                    public Integer call() { return n; }};

                equal(c.call(), n);

            }

    }

    //--------------------- 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 PrivilegedCallables().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);}}

}