/*

 * Copyright (c) 1999, 2019, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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 javax.security.auth.callback;

/**

 * <p> Underlying security services instantiate and pass a

 * {@code TextOutputCallback} to the {@code handle}

 * method of a {@code CallbackHandler} to display information messages,

 * warning messages and error messages.

 *

 * @since 1.4

 * @see javax.security.auth.callback.CallbackHandler

 */

public class TextOutputCallback implements Callback, java.io.Serializable {

    @java.io.Serial

    private static final long serialVersionUID = 1689502495511663102L;

    /** Information message. */

    public static final int INFORMATION         = 0;

    /** Warning message. */

    public static final int WARNING             = 1;

    /** Error message. */

    public static final int ERROR               = 2;

    /**

     * @serial

     * @since 1.4

     */

    private int messageType;

    /**

     * @serial

     * @since 1.4

     */

    private String message;

    /**

     * Construct a TextOutputCallback with a message type and message

     * to be displayed.

     *

     * @param messageType the message type ({@code INFORMATION},

     *                  {@code WARNING} or {@code ERROR}).

     *

     * @param message the message to be displayed.

     *

     * @exception IllegalArgumentException if {@code messageType}

     *                  is not either {@code INFORMATION},

     *                  {@code WARNING} or {@code ERROR},

     *                  if {@code message} is null,

     *                  or if {@code message} has a length of 0.

     */

    public TextOutputCallback(int messageType, String message) {

        if ((messageType != INFORMATION &&

                messageType != WARNING && messageType != ERROR) ||

            message == null || message.isEmpty())

            throw new IllegalArgumentException();

        this.messageType = messageType;

        this.message = message;

    }

    /**

     * Get the message type.

     *

     * @return the message type ({@code INFORMATION},

     *                  {@code WARNING} or {@code ERROR}).

     */

    public int getMessageType() {

        return messageType;

    }

    /**

     * Get the message to be displayed.

     *

     * @return the message to be displayed.

     */

    public String getMessage() {

        return message;

    }

}