/*

 * Copyright (c) 2012, 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 7160242 7165118 7197662

 * @summary Check if NullPointerException is thrown if the key passed

 *          to remove() is null.

 * @run main/othervm -Djava.util.prefs.userRoot=. RemoveNullKeyCheck

 */

import java.util.prefs.Preferences;

import java.util.prefs.AbstractPreferences;

import java.util.prefs.BackingStoreException;

public class RemoveNullKeyCheck {

    private static boolean failed = false;

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

        checkPreferencesRemove();

        checkAbstractPreferencesRemove();

        if (failed) {

            throw new RuntimeException("Expected NullPointerException " +

                                       "not thrown");

        }

    }

    public static void checkPreferencesRemove() {

        try {

            Preferences node = Preferences.userRoot().node("N1");

            node.remove(null);

            failed = true;

        } catch (NullPointerException npe) {

        }

    }

    public static void checkAbstractPreferencesRemove() {

        Preferences abstrPrefs = new AbstractPreferences(null, "") {

            @Override

            protected void putSpi(String key, String value) {

            }

            @Override

            protected String getSpi(String key) {

                return null;

            }

            @Override

            protected void removeSpi(String key) {

            }

            @Override

            protected void removeNodeSpi() throws BackingStoreException {

            }

            @Override

            protected String[] keysSpi() throws BackingStoreException {

                return new String[0];

            }

            @Override

            protected String[] childrenNamesSpi() throws BackingStoreException {

                return new String[0];

            }

            @Override

            protected AbstractPreferences childSpi(String name) {

                return null;

            }

            @Override

            protected void syncSpi() throws BackingStoreException {

            }

            @Override

            protected void flushSpi() throws BackingStoreException {

            }

        };

        try {

            abstrPrefs.remove(null);

            failed = true;

        } catch(NullPointerException npe) {

        }

    }

}