Quelle NonNestmates.java Sprache: JAVA

/*
* 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.
*/

/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;

import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
import java.util.concurrent.atomic.AtomicLongFieldUpdater;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;

/**
* This source file contains test code deliberately not contained in
* the same source file as the tests that use them, to avoid making
* them nestmates, which affects accessibility rules (see JEP 181).
*/
class NonNestmates {

    public void checkPackageAccess(AtomicIntegerFieldUpdaterTest obj) {
        obj.x = 72;
        AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
            AtomicIntegerFieldUpdater.newUpdater(
                AtomicIntegerFieldUpdaterTest.class, "x");
        assertEquals(72, a.get(obj));
        assertTrue(a.compareAndSet(obj, 72, 73));
        assertEquals(73, a.get(obj));
    }

    public void checkPackageAccess(AtomicLongFieldUpdaterTest obj) {
        obj.x = 72L;
        AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
            AtomicLongFieldUpdater.newUpdater(
                AtomicLongFieldUpdaterTest.class, "x");
        assertEquals(72L, a.get(obj));
        assertTrue(a.compareAndSet(obj, 72L, 73L));
        assertEquals(73L, a.get(obj));
    }

    public void checkPackageAccess(AtomicReferenceFieldUpdaterTest obj) {
        Item one = new Item(1);
        Item two = new Item(2);
        obj.x = one;
        AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest,Item> a =
            AtomicReferenceFieldUpdater.newUpdater(
                AtomicReferenceFieldUpdaterTest.class, Item.class, "x");
        assertSame(one, a.get(obj));
        assertTrue(a.compareAndSet(obj, one, two));
        assertSame(two, a.get(obj));
    }

    public void checkPrivateAccess(AtomicIntegerFieldUpdaterTest obj) {
        try {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
                AtomicIntegerFieldUpdater.newUpdater(
                    AtomicIntegerFieldUpdaterTest.class, "privateField");
            throw new AssertionError("should throw");
        } catch (RuntimeException success) {
            assertNotNull(success.getCause());
        }
    }

    public void checkPrivateAccess(AtomicLongFieldUpdaterTest obj) {
        try {
            AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                AtomicLongFieldUpdater.newUpdater(
                    AtomicLongFieldUpdaterTest.class, "privateField");
            throw new AssertionError("should throw");
        } catch (RuntimeException success) {
            assertNotNull(success.getCause());
        }
    }

    public void checkPrivateAccess(AtomicReferenceFieldUpdaterTest obj) {
        try {
            AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest,Integer> a =
                AtomicReferenceFieldUpdater.newUpdater(
                    AtomicReferenceFieldUpdaterTest.class,
                    Integer.class, "privateField");
            throw new AssertionError("should throw");
        } catch (RuntimeException success) {
            assertNotNull(success.getCause());
        }
    }

    static class AtomicIntegerFieldUpdaterTestSubclass
        extends AtomicIntegerFieldUpdaterTest {

        public void checkPrivateAccess() {
            try {
                AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
                    AtomicIntegerFieldUpdater.newUpdater(
                        AtomicIntegerFieldUpdaterTest.class, "privateField");
                shouldThrow();
            } catch (RuntimeException success) {
                assertNotNull(success.getCause());
            }
        }

        public void checkCompareAndSetProtectedSub() {
            AtomicIntegerFieldUpdater<AtomicIntegerFieldUpdaterTest> a =
                AtomicIntegerFieldUpdater.newUpdater(
                    AtomicIntegerFieldUpdaterTest.class, "protectedField");
            this.protectedField = 1;
            assertTrue(a.compareAndSet(this, 1, 2));
            assertTrue(a.compareAndSet(this, 2, -4));
            assertEquals(-4, a.get(this));
            assertFalse(a.compareAndSet(this, -5, 7));
            assertEquals(-4, a.get(this));
            assertTrue(a.compareAndSet(this, -4, 7));
            assertEquals(7, a.get(this));
        }
    }

    static class AtomicLongFieldUpdaterTestSubclass
        extends AtomicLongFieldUpdaterTest {

        public void checkPrivateAccess() {
            try {
                AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                    AtomicLongFieldUpdater.newUpdater(
                        AtomicLongFieldUpdaterTest.class, "privateField");
                shouldThrow();
            } catch (RuntimeException success) {
                assertNotNull(success.getCause());
            }
        }

        public void checkCompareAndSetProtectedSub() {
            AtomicLongFieldUpdater<AtomicLongFieldUpdaterTest> a =
                AtomicLongFieldUpdater.newUpdater(
                    AtomicLongFieldUpdaterTest.class, "protectedField");
            this.protectedField = 1;
            assertTrue(a.compareAndSet(this, 1, 2));
            assertTrue(a.compareAndSet(this, 2, -4));
            assertEquals(-4, a.get(this));
            assertFalse(a.compareAndSet(this, -5, 7));
            assertEquals(-4, a.get(this));
            assertTrue(a.compareAndSet(this, -4, 7));
            assertEquals(7, a.get(this));
        }
    }

    static class AtomicReferenceFieldUpdaterTestSubclass
        extends AtomicReferenceFieldUpdaterTest {

        public void checkPrivateAccess() {
            try {
                AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest,Integer> a =
                    AtomicReferenceFieldUpdater.newUpdater(
                        AtomicReferenceFieldUpdaterTest.class,
                        Integer.class, "privateField");
                shouldThrow();
            } catch (RuntimeException success) {
                assertNotNull(success.getCause());
            }
        }

        public void checkCompareAndSetProtectedSub() {
            AtomicReferenceFieldUpdater<AtomicReferenceFieldUpdaterTest,Item> a =
                AtomicReferenceFieldUpdater.newUpdater(
                    AtomicReferenceFieldUpdaterTest.class,
                    Item.class, "protectedField");
            this.protectedField = one;
            assertTrue(a.compareAndSet(this, one, two));
            assertTrue(a.compareAndSet(this, two, minusFour));
            assertSame(minusFour, a.get(this));
            assertFalse(a.compareAndSet(this, minusFive, seven));
            assertNotSame(seven, a.get(this));
            assertTrue(a.compareAndSet(this, minusFour, seven));
            assertSame(seven, a.get(this));
        }
    }
}

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