/*

 * Copyright (c) 2015, 2017 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.

 */

package c;

import java.security.Provider;

import java.security.Security;

import java.util.Iterator;

import java.util.ServiceLoader;

/**

 * A Test client using different mechanism to search the custom security

 * provider. It uses ClassLoader, ServiceLoader and default mechanism to find

 * a provider registered through "java.security" extension file.

 */

public class TestClient {

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

        Provider p = null;

        if (args != null && args.length > 1) {

            switch (args[0]) {

                case "CL":

                    p = (Provider) Class.forName(args[1]).newInstance();

                    if (Security.addProvider(p) == -1) {

                        throw new RuntimeException("Failed to add provider");

                    }

                    break;

                case "SL":

                    ServiceLoader<Provider> services

                            = ServiceLoader.load(java.security.Provider.class);

                    Iterator<Provider> iterator = services.iterator();

                    while (iterator.hasNext()) {

                        Provider spr = iterator.next();

                        if (spr.getName().equals(args[1])) {

                            p = spr;

                            if (Security.addProvider(p) == -1) {

                                throw new RuntimeException(

                                        "Failed to add provider");

                            }

                            break;

                        }

                    }

                    break;

                case "SPN":

                case "SPT":

                    p = Security.getProvider(args[1]);

                    break;

                default:

                    throw new RuntimeException("Invalid argument.");

            }

        }

        if (p == null) {

            throw new RuntimeException("Provider TestProvider not found");

        }

        System.out.printf("Client: found provider %s", p.getName());

    }

}