/*

 * Copyright (c) 2018, 2019, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package jdk.internal.util;

/**

 * System Property access for internal use only.

 * Read-only access to System property values initialized during Phase 1

 * are cached.  Setting, clearing, or modifying the value using

 * {@link System#setProperty) or {@link System#getProperties()} is ignored.

 * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked

 * in these access methods. The caller of these methods should take care to ensure

 * that the returned property is not made accessible to untrusted code.</strong>

 */

public final class StaticProperty {

    // The class static initialization is triggered to initialize these final

    // fields during init Phase 1 and before a security manager is set.

    private static final String JDK_SERIAL_FILTER = System.getProperty("jdk.serialFilter");

    private StaticProperty() {}

    /**

     *

     * Return the {@code jdk.serialFilter} system property.

     *

     * <strong>{@link SecurityManager#checkPropertyAccess} is NOT checked

     * in this method. The caller of this method should take care to ensure

     * that the returned property is not made accessible to untrusted code.</strong>

     *

     * @return the {@code user.name} system property

     */

    public static String jdkSerialFilter() {

        return JDK_SERIAL_FILTER;

    }

}