/*

 * Copyright (c) 1999, 2013, 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

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 */

package javax.security.auth.callback;

/**

 * <p> Underlying security services instantiate and pass a

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

 * method of a {@code CallbackHandler} to retrieve generic text

 * information.

 *

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

 */

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

    private static final long serialVersionUID = -8064222478852811804L;

    /**

     * @serial

     * @since 1.4

     */

    private String prompt;

    /**

     * @serial

     * @since 1.4

     */

    private String defaultText;

    /**

     * @serial

     * @since 1.4

     */

    private String inputText;

    /**

     * Construct a {@code TextInputCallback} with a prompt.

     *

     * <p>

     *

     * @param prompt the prompt used to request the information.

     *

     * @exception IllegalArgumentException if {@code prompt} is null

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

     */

    public TextInputCallback(String prompt) {

        if (prompt == null || prompt.length() == 0)

            throw new IllegalArgumentException();

        this.prompt = prompt;

    }

    /**

     * Construct a {@code TextInputCallback} with a prompt

     * and default input value.

     *

     * <p>

     *

     * @param prompt the prompt used to request the information. <p>

     *

     * @param defaultText the text to be used as the default text displayed

     *                  with the prompt.

     *

     * @exception IllegalArgumentException if {@code prompt} is null,

     *                  if {@code prompt} has a length of 0,

     *                  if {@code defaultText} is null

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

     */

    public TextInputCallback(String prompt, String defaultText) {

        if (prompt == null || prompt.length() == 0 ||

            defaultText == null || defaultText.length() == 0)

            throw new IllegalArgumentException();

        this.prompt = prompt;

        this.defaultText = defaultText;

    }

    /**

     * Get the prompt.

     *

     * <p>

     *

     * @return the prompt.

     */

    public String getPrompt() {

        return prompt;

    }

    /**

     * Get the default text.

     *

     * <p>

     *

     * @return the default text, or null if this {@code TextInputCallback}

     *          was not instantiated with {@code defaultText}.

     */

    public String getDefaultText() {

        return defaultText;

    }

    /**

     * Set the retrieved text.

     *

     * <p>

     *

     * @param text the retrieved text, which may be null.

     *

     * @see #getText

     */

    public void setText(String text) {

        this.inputText = text;

    }

    /**

     * Get the retrieved text.

     *

     * <p>

     *

     * @return the retrieved text, which may be null.

     *

     * @see #setText

     */

    public String getText() {

        return inputText;

    }

}