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 * 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

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 */

/**

 * @test

 * @build CanAccessTest

 * @modules java.base/jdk.internal.misc:+open

 * @run testng CanAccessTest

 * @summary Test AccessibleObject::canAccess method

 */

import java.lang.reflect.Constructor;

import java.lang.reflect.Method;

import java.security.SecureClassLoader;

import jdk.internal.misc.Unsafe;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

@Test

public class CanAccessTest {

    private static Unsafe INSTANCE = Unsafe.getUnsafe();

    /**

     * null object parameter for Constructor

     */

    public void testConstructor() throws Exception {

        Constructor<?> ctor = Unsafe.class.getDeclaredConstructor();

        assertFalse(ctor.canAccess(null));

        assertTrue(ctor.trySetAccessible());

        try {

            // non-null object parameter

            ctor.canAccess(INSTANCE);

            assertTrue(false);

        } catch (IllegalArgumentException expected) {}

    }

    /**

     * Test protected constructors

     */

    public void testProtectedConstructor() throws Exception {

        TestLoader.testProtectedConstructorNonOpenedPackage();

        Constructor<?> ctor = TestLoader.class.getDeclaredConstructor();

        assertTrue(ctor.canAccess(null));

    }

    /**

     * null object parameter  for static members

     */

    public void testStaticMember() throws Exception {

        Method m = Unsafe.class.getDeclaredMethod("throwIllegalAccessError");

        assertFalse(m.canAccess(null));

        assertTrue(m.trySetAccessible());

        try {

            // non-null object parameter

            m.canAccess(INSTANCE);

            assertTrue(false);

        } catch (IllegalArgumentException expected) { }

    }

    /**

     * Test protected static

     */

    public void testProtectedStatic() throws Exception {

        Method m = TestLoader.testProtectedStatic();

        assertFalse(m.canAccess(null));

    }

    /**

     * the specified object must be an instance of the declaring class

     * for instance members

     */

    public void testInstanceMethod() throws Exception {

        Method m = Unsafe.class.getDeclaredMethod("addressSize0");

        assertFalse(m.canAccess(INSTANCE));

        try {

            m.canAccess(null);

            assertTrue(false);

        } catch (IllegalArgumentException expected) { }

    }

    /**

     * the specified object must be an instance of the declaring class

     * for instance members

     */

    public void testInvalidInstanceObject() throws Exception {

        Class<?> clazz = Class.forName("sun.security.x509.X500Name");

        Method m = clazz.getDeclaredMethod("size");

        try {

            m.canAccess(INSTANCE);

            assertTrue(false);

        } catch (IllegalArgumentException expected) { }

    }

    static class TestLoader extends SecureClassLoader {

        public static Method testProtectedStatic() throws Exception {

            Method m = ClassLoader.class.getDeclaredMethod("registerAsParallelCapable");

            assertTrue(m.canAccess(null));

            return m;

        }

        protected TestLoader() throws Exception {

            Constructor<?> ctor = SecureClassLoader.class.getDeclaredConstructor();

            assertFalse(ctor.canAccess(null));

            assertFalse(ctor.trySetAccessible());

        }

        public static void testProtectedConstructorNonOpenedPackage() throws Exception {

            new TestLoader();

        }

    }

}