/*

 * Copyright (c) 2005, 2006, 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.

 */

//

import java.io.*;

import java.util.*;

public class Load {

    private static PrintStream out = System.err;

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

        boolean installedOnly = false;

        List<String> expected = new ArrayList<String>(Arrays.asList(args));

        if (!expected.isEmpty() && expected.get(0).equals("-i")) {

            expected.remove(0);

            installedOnly = true;

        }

        if (expected.isEmpty())

            throw new Exception("usage: Load [-i] ( fail | provider-class-name )*");

        ServiceLoader<FooService> sl = (installedOnly

                                        ? ServiceLoader.loadInstalled(FooService.class)

                                        : ServiceLoader.load(FooService.class));

        out.format("%s%n", sl);

        Iterator<FooService> sli = sl.iterator();

        Iterator<String> ei = expected.iterator();

        for (;; ei.remove()) {

            FooService fp = null;

            try {

                if (!sli.hasNext())

                    break;

                fp = sli.next();

            } catch (ServiceConfigurationError x) {

                if (ei.next().equals("fail")) {

                    out.format("Failed as expected: %s%n", x);

                    continue;

                }

                throw x;

            }

            String ec = ei.next();

            if (!fp.getClass().getName().equals(ec))

                throw new

                    Exception(String.format("Wrong provider %s; expected %s",

                                            fp.getClass().getName(), ec));

            out.format("Provider found: %s%n", fp.getClass().getName());

        }

        if (ei.hasNext())

            throw new Exception("Missing providers: " + expected);

    }

}