Java example source code file (CheckCtor.java)

This example Java source code file (CheckCtor.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

accesscontrolcontext, accesscontrolcontexts, checkctor, exception, expected, nullpointerexception, protectiondomain, security

The CheckCtor.java Java example source code

/*
 * Copyright (c) 2008, 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 6631361
 * @summary Test constructor when PD array is null or contains all null contexts
 */

import java.security.AccessControlContext;
import java.security.ProtectionDomain;

public class CheckCtor {

    public static void main(String[] args) throws Exception {

        // check that null PD array throws NPE
        try {
            new AccessControlContext(null);
            throw new Exception("Expected NullPointerException not thrown");
        } catch (Exception e) {
            if (!(e instanceof NullPointerException)) {
                throw new Exception("Expected NullPointerException not thrown");
            }
        }

        // check that empty PD array equals PD array of one or more nulls
        ProtectionDomain zero[] = {};
        ProtectionDomain null1[] = {null};
        ProtectionDomain null2[] = {null, null};

        AccessControlContext accZero = new AccessControlContext(zero);
        AccessControlContext accNull1 = new AccessControlContext(null1);
        AccessControlContext accNull2 = new AccessControlContext(null2);

        testEquals(accZero, accNull1);
        testEquals(accZero, accNull2);
        testEquals(accNull1, accNull2);
        testEquals(accNull1, accZero);
        testEquals(accNull2, accZero);
        testEquals(accNull2, accNull1);
    }

    private static void testEquals(AccessControlContext acc1,
        AccessControlContext acc2) throws Exception {
        if (!acc1.equals(acc2)) {
            throw new Exception("AccessControlContexts should be equal");
        }
    }
}