/*
 * Copyright (c) 2015, 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 javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;

public class Helper {

    static class UserPasswordHandler implements CallbackHandler {

        private final String name;
        private final String password;

        UserPasswordHandler(String name, String password) {
            this.name = name;
            this.password = password;
        }

        @Override
        public void handle(Callback[] callbacks)
                throws UnsupportedCallbackException {
            for (Callback callback : callbacks) {
                if (callback instanceof PasswordCallback) {
                    ((PasswordCallback) callback).setPassword(
                            password.toCharArray());
                } else if (callback instanceof NameCallback) {
                    ((NameCallback)callback).setName(name);
                } else {
                    throw new UnsupportedCallbackException(callback);
                }
            }
        }
    }
}