/*

 * Copyright (c) 1999, 2011, 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

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 */

/*

 * @test

 * @library ../testlibrary

 * @summary Make sure getProviders(filter) doesn't throw NPE

 * @run main/othervm NoInstalledProviders

 */

import java.security.*;

public class NoInstalledProviders {

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

        ProvidersSnapshot snapshot = ProvidersSnapshot.create();

        try {

            main0(args);

        } finally {

            snapshot.restore();

        }

    }

    public static void main0(String[] args) throws Exception {

        Provider[] provs = Security.getProviders();

        // make sure there are no providers in the system

        for(int i = 0; i < provs.length; i++ ) {

            Security.removeProvider( provs[i].getName());

        }

        String filter = "Signature.SHA1withDSA";

        provs = Security.getProviders(filter);

    }

}