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jeremybenn |
/* ConfirmationCallback.java -- callback for confirmations.
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Copyright (C) 2003, Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.security.auth.callback;
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import java.io.Serializable;
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/**
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* Underlying security services instantiate and pass a
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* <code>ConfirmationCallback</code> to the <code>handle()</code> method of a
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* {@link CallbackHandler} to ask for YES/NO, OK/CANCEL, YES/NO/CANCEL or other
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* similar confirmations.
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*
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* @see CallbackHandler
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*/
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public class ConfirmationCallback implements Callback, Serializable
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{
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// Constants and variables
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// -------------------------------------------------------------------------
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/**
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* <p>Unspecified option type.</p>
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*
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* <p>The <code>getOptionType</code> method returns this value if this
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* <code>ConfirmationCallback</code> was instantiated with <code>options</code>
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* instead of an <code>optionType</code>.</p>
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*/
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public static final int UNSPECIFIED_OPTION = -1;
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/**
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* <p>YES/NO confirmation option.</p>
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*
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* <p>An underlying security service specifies this as the <code>optionType</code>
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* to a <code>ConfirmationCallback</code> constructor if it requires a
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* confirmation which can be answered with either <code>YES</code> or
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* <code>NO</code>.</p>
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*/
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public static final int YES_NO_OPTION = 0;
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/**
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* <p>YES/NO/CANCEL confirmation confirmation option.</p>
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*
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* <p>An underlying security service specifies this as the <code>optionType</code>
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* to a <code>ConfirmationCallback</code> constructor if it requires a
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* confirmation which can be answered with either <code>YES</code>,
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* <code>NO</code> or <code>CANCEL</code>.
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*/
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public static final int YES_NO_CANCEL_OPTION = 1;
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/**
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* <p>OK/CANCEL confirmation confirmation option.</p>
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*
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* <p>An underlying security service specifies this as the <code>optionType</code>
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* to a <code>ConfirmationCallback</code> constructor if it requires a
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* confirmation which can be answered with either <code>OK</code> or
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* <code>CANCEL</code>.</p>
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*/
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public static final int OK_CANCEL_OPTION = 2;
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/**
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* <p>YES option.</p>
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*
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* <p>If an <code>optionType</code> was specified to this
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* <code>ConfirmationCallback</code>, this option may be specified as a
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* <code>defaultOption</code> or returned as the selected index.</p>
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*/
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public static final int YES = 0;
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/**
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* <p>NO option.</p>
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*
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* <p>If an <code>optionType</code> was specified to this
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* <code>ConfirmationCallback</code>, this option may be specified as a
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* <code>defaultOption</code> or returned as the selected index.</p>
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*/
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public static final int NO = 1;
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/**
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* <p>CANCEL option.</p>
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*
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* <p>If an <code>optionType</code> was specified to this
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* <code>ConfirmationCallback</code>, this option may be specified as a
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* <code>defaultOption</code> or returned as the selected index.</p>
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*/
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public static final int CANCEL = 2;
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/**
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* <p>OK option.</p>
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*
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* <p>If an <code>optionType</code> was specified to this
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* <code>ConfirmationCallback</code>, this option may be specified as a
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* <code>defaultOption</code> or returned as the selected index.</p>
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*/
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public static final int OK = 3;
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/** INFORMATION message type. */
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public static final int INFORMATION = 0;
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/** WARNING message type. */
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public static final int WARNING = 1;
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/** ERROR message type. */
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public static final int ERROR = 2;
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/**
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* @serial
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* @since 1.4
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*/
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private String prompt;
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/**
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* @serial
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* @since 1.4
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*/
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private int messageType;
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/**
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* @serial
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* @since 1.4
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*/
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private int optionType;
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/**
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* @serial
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* @since 1.4
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*/
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private int defaultOption;
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/**
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* @serial
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* @since 1.4
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*/
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private String[] options = null;
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/**
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* @serial
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* @since 1.4
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*/
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private int selection;
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// Constructor(s)
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// -------------------------------------------------------------------------
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/**
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* <p>Construct a <code>ConfirmationCallback</code> with a message type, an
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* option type and a default option.</p>
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*
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* <p>Underlying security services use this constructor if they require
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* either a YES/NO, YES/NO/CANCEL or OK/CANCEL confirmation.</p>
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*
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* @param messageType the message type (INFORMATION, WARNING or ERROR).
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* @param optionType the option type (YES_NO_OPTION, YES_NO_CANCEL_OPTION or
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* OK_CANCEL_OPTION).
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* @param defaultOption the default option from the provided optionType (YES,
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* NO, CANCEL or OK).
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* @throws IllegalArgumentException if <code>messageType</code> is not either
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* <code>INFORMATION</code>, <code>WARNING</code>, or <code>ERROR</code>, if
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* <code>optionType</code> is not either <code>YES_NO_OPTION</code>,
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* <code>YES_NO_CANCEL_OPTION</code>, or <code>OK_CANCEL_OPTION</code>, or if
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* <code>defaultOption</code> does not correspond to one of the options in
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* <code>optionType</code>.
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*/
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public ConfirmationCallback(int messageType, int optionType, int defaultOption)
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throws IllegalArgumentException
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{
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super();
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setMessageType(messageType);
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setOptionType(optionType, defaultOption);
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this.defaultOption = defaultOption;
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}
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/**
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* <p>Construct a <code>ConfirmationCallback</code> with a message type, a
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* list of options and a default option.</p>
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*
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* <p>Underlying security services use this constructor if they require a
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* confirmation different from the available preset confirmations provided
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* (for example, CONTINUE/ABORT or STOP/GO). The confirmation options are
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* listed in the <code>options</code> array, and are displayed by the
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* {@link CallbackHandler} implementation in a manner consistent with the
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* way preset options are displayed.</p>
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*
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* @param messageType the message type (INFORMATION, WARNING or ERROR).
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* @param options the list of confirmation options.
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* @param defaultOption the default option, represented as an index into the
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* <code>options</code> array.
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* @throws IllegalArgumentException if <code>messageType</code> is not either
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* <code>INFORMATION</code>, <code>WARNING</code>, or <code>ERROR</code>, if
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* <code>options</code> is <code>null</code>, if <code>options</code> has a
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* length of <code>0</code>, if any element from <code>options</code> is
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* <code>null</code>, if any element from <code>options</code> has a length
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* of <code>0</code>, or if <code>defaultOption</code> does not lie within
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* the array boundaries of <code>options</code>.
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*/
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public ConfirmationCallback(int messageType, String[] options, int defaultOption)
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{
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super();
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setMessageType(messageType);
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setOptions(options, defaultOption);
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this.defaultOption = defaultOption;
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}
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/**
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* <p>Construct a <code>ConfirmationCallback</code> with a prompt, message
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* type, an option type and a default option.</p>
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*
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* <p>Underlying security services use this constructor if they require
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* either a YES/NO, YES/NO/CANCEL or OK/CANCEL confirmation.</p>
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*
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* @param prompt the prompt used to describe the list of options.
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* @param messageType the message type (INFORMATION, WARNING or ERROR).
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* @param optionType the option type (YES_NO_OPTION, YES_NO_CANCEL_OPTION or
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* OK_CANCEL_OPTION).
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* @param defaultOption the default option from the provided optionType (YES,
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* NO, CANCEL or OK).
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* @throws IllegalArgumentException if <code>prompt</code> is <code>null</code>,
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* if <code>prompt</code> has a length of <code>0</code>, if
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* <code>messageType</code> is not either <code>INFORMATION</code>,
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* <code>WARNING</code>, or <code>ERROR</code>, if <code>optionType</code> is
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* not either <code>YES_NO_OPTION</code>, <code>YES_NO_CANCEL_OPTION</code>,
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* or <code>OK_CANCEL_OPTION</code>, or if <code>defaultOption</code> does
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* not correspond to one of the options in <code>optionType</code>.
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*/
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public ConfirmationCallback(String prompt, int messageType, int optionType,
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int defaultOption)
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{
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super();
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setPrompt(prompt);
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setMessageType(messageType);
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setOptionType(optionType, defaultOption);
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this.defaultOption = defaultOption;
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}
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/**
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* <p>Construct a <code>ConfirmationCallback</code> with a prompt, message
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* type, a list of options and a default option.</p>
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*
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* <p>Underlying security services use this constructor if they require a
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* confirmation different from the available preset confirmations provided
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* (for example, CONTINUE/ABORT or STOP/GO). The confirmation options are
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* listed in the <code>options</code> array, and are displayed by the
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* {@link CallbackHandler} implementation in a manner consistent with the
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* way preset options are displayed.</p>
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*
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* @param prompt the prompt used to describe the list of options.
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* @param messageType the message type (INFORMATION, WARNING or ERROR).
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* @param options the list of confirmation options.
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* @param defaultOption the default option, represented as an index into the
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* <code>options</code> array.
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* @throws IllegalArgumentException if <code>prompt</code> is <code>null</code>,
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* if <code>prompt</code> has a length of <code>0</code>, if
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* <code>messageType</code> is not either <code>INFORMATION</code>,
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* <code>WARNING</code>, or <code>ERROR</code>, if <code>options</code> is
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* <code>null</code>, if <code>options</code> has a length of <code>0</code>,
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* if any element from <code>options</code> is <code>null</code>, if any
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* element from <code>options</code> has a length of <code>0</code>, or if
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* <code>defaultOption</code> does not lie within the array boundaries of
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* <code>options</code>.
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*/
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public ConfirmationCallback(String prompt, int messageType, String[] options,
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int defaultOption)
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{
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super();
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setPrompt(prompt);
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setMessageType(messageType);
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setOptions(options, defaultOption);
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this.defaultOption = defaultOption;
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}
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// Class methods
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// -------------------------------------------------------------------------
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// Instance methods
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// -------------------------------------------------------------------------
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/**
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* Get the prompt.
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*
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* @return the prompt, or <code>null</code> if this
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* <code>ConfirmationCallback</code> was instantiated without a prompt.
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*/
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public String getPrompt()
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{
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return prompt;
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}
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/**
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* Get the message type.
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*
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* @return the message type (INFORMATION, WARNING or ERROR).
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*/
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public int getMessageType()
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{
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return messageType;
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}
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/**
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* <p>Get the option type.</p>
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*
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* <p>If this method returns {@link #UNSPECIFIED_OPTION}, then this
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* <code>ConfirmationCallback</code> was instantiated with <code>options</code>
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* instead of an <code>optionType</code>. In this case, invoke the
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* {@link #getOptions()} method to determine which confirmation options to
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* display.</p>
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|
*
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* @return the option type (YES_NO_OPTION, YES_NO_CANCEL_OPTION or
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|
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* OK_CANCEL_OPTION), or UNSPECIFIED_OPTION if this
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348 |
|
|
* <code>ConfirmationCallback</code> was instantiated with <code>options</code>
|
349 |
|
|
* instead of an <code>optionType</code>.
|
350 |
|
|
*/
|
351 |
|
|
public int getOptionType()
|
352 |
|
|
{
|
353 |
|
|
if (options != null)
|
354 |
|
|
{
|
355 |
|
|
return UNSPECIFIED_OPTION;
|
356 |
|
|
}
|
357 |
|
|
return optionType;
|
358 |
|
|
}
|
359 |
|
|
|
360 |
|
|
/**
|
361 |
|
|
* Get the confirmation options.
|
362 |
|
|
*
|
363 |
|
|
* @return the list of confirmation options, or <code>null</code> if this
|
364 |
|
|
* <code>ConfirmationCallback</code> was instantiated with an
|
365 |
|
|
* <code>optionType</code> instead of <code>options</code>.
|
366 |
|
|
*/
|
367 |
|
|
public String[] getOptions()
|
368 |
|
|
{
|
369 |
|
|
return options;
|
370 |
|
|
}
|
371 |
|
|
|
372 |
|
|
/**
|
373 |
|
|
* Get the default option.
|
374 |
|
|
*
|
375 |
|
|
* @return the default option, represented as <code>YES</code>, <code>NO</code>,
|
376 |
|
|
* <code>OK</code> or <code>CANCEL</code> if an <code>optionType</code> was
|
377 |
|
|
* specified to the constructor of this <code>ConfirmationCallback</code>.
|
378 |
|
|
* Otherwise, this method returns the default option as an index into the
|
379 |
|
|
* <code>options</code> array specified to the constructor of this
|
380 |
|
|
* <code>ConfirmationCallback</code>.
|
381 |
|
|
*/
|
382 |
|
|
public int getDefaultOption()
|
383 |
|
|
{
|
384 |
|
|
return defaultOption;
|
385 |
|
|
}
|
386 |
|
|
|
387 |
|
|
/**
|
388 |
|
|
* Set the selected confirmation option.
|
389 |
|
|
*
|
390 |
|
|
* @param selection the selection represented as <code>YES</code>,
|
391 |
|
|
* <code>NO</code>, <code>OK</code> or <code>CANCEL</code> if an
|
392 |
|
|
* <code>optionType</code> was specified to the constructor of this
|
393 |
|
|
* <code>ConfirmationCallback</code>. Otherwise, the <code>selection</code>
|
394 |
|
|
* represents the index into the <code>options</code> array specified to the
|
395 |
|
|
* constructor of this <code>ConfirmationCallback</code>.
|
396 |
|
|
* @see #getSelectedIndex()
|
397 |
|
|
*/
|
398 |
|
|
public void setSelectedIndex(int selection)
|
399 |
|
|
{
|
400 |
|
|
if (options != null)
|
401 |
|
|
{
|
402 |
|
|
setOptions(options, selection);
|
403 |
|
|
}
|
404 |
|
|
else
|
405 |
|
|
{
|
406 |
|
|
setOptionType(optionType, selection);
|
407 |
|
|
}
|
408 |
|
|
}
|
409 |
|
|
|
410 |
|
|
/**
|
411 |
|
|
* Get the selected confirmation option.
|
412 |
|
|
*
|
413 |
|
|
* @return the selected confirmation option represented as <code>YES</code>,
|
414 |
|
|
* <code>NO</code>, <code>OK</code> or <code>CANCEL</code> if an
|
415 |
|
|
* <code>optionType</code> was specified to the constructor of this
|
416 |
|
|
* <code>ConfirmationCallback</code>. Otherwise, this method returns the
|
417 |
|
|
* selected confirmation option as an index into the <code>options</code>
|
418 |
|
|
* array specified to the constructor of this <code>ConfirmationCallback</code>.
|
419 |
|
|
* @see #setSelectedIndex(int)
|
420 |
|
|
*/
|
421 |
|
|
public int getSelectedIndex()
|
422 |
|
|
{
|
423 |
|
|
return this.selection;
|
424 |
|
|
}
|
425 |
|
|
|
426 |
|
|
private void setMessageType(int messageType) throws IllegalArgumentException
|
427 |
|
|
{
|
428 |
|
|
switch (messageType)
|
429 |
|
|
{
|
430 |
|
|
case INFORMATION:
|
431 |
|
|
case WARNING:
|
432 |
|
|
case ERROR: this.messageType = messageType; break;
|
433 |
|
|
default: throw new IllegalArgumentException("illegal message type");
|
434 |
|
|
}
|
435 |
|
|
}
|
436 |
|
|
|
437 |
|
|
private void setOptionType(int optionType, int selectedOption)
|
438 |
|
|
throws IllegalArgumentException
|
439 |
|
|
{
|
440 |
|
|
switch (optionType)
|
441 |
|
|
{
|
442 |
|
|
case YES_NO_OPTION:
|
443 |
|
|
this.optionType = optionType;
|
444 |
|
|
switch (selectedOption)
|
445 |
|
|
{
|
446 |
|
|
case YES:
|
447 |
|
|
case NO: this.selection = selectedOption; break;
|
448 |
|
|
default: throw new IllegalArgumentException("invalid option");
|
449 |
|
|
}
|
450 |
|
|
break;
|
451 |
|
|
case YES_NO_CANCEL_OPTION:
|
452 |
|
|
this.optionType = optionType;
|
453 |
|
|
switch (selectedOption)
|
454 |
|
|
{
|
455 |
|
|
case YES:
|
456 |
|
|
case NO:
|
457 |
|
|
case CANCEL: this.selection = selectedOption; break;
|
458 |
|
|
default: throw new IllegalArgumentException("invalid option");
|
459 |
|
|
}
|
460 |
|
|
break;
|
461 |
|
|
case OK_CANCEL_OPTION:
|
462 |
|
|
this.optionType = optionType;
|
463 |
|
|
switch (selectedOption)
|
464 |
|
|
{
|
465 |
|
|
case OK:
|
466 |
|
|
case CANCEL: this.selection = selectedOption; break;
|
467 |
|
|
default: throw new IllegalArgumentException("invalid option");
|
468 |
|
|
}
|
469 |
|
|
break;
|
470 |
|
|
default:
|
471 |
|
|
throw new IllegalArgumentException("illegal option type");
|
472 |
|
|
}
|
473 |
|
|
}
|
474 |
|
|
|
475 |
|
|
private void setOptions(String[] options, int selectedOption)
|
476 |
|
|
throws IllegalArgumentException
|
477 |
|
|
{
|
478 |
|
|
if ((selectedOption < 0) || (selectedOption > options.length - 1))
|
479 |
|
|
{
|
480 |
|
|
throw new IllegalArgumentException("invalid selection");
|
481 |
|
|
}
|
482 |
|
|
if ((options == null) || (options.length == 0))
|
483 |
|
|
{
|
484 |
|
|
throw new IllegalArgumentException("options is null or empty");
|
485 |
|
|
}
|
486 |
|
|
for (int i = 0; i < options.length; i++)
|
487 |
|
|
{
|
488 |
|
|
if ((options[i] == null) || (options[i].length() == 0))
|
489 |
|
|
{
|
490 |
|
|
throw new IllegalArgumentException("options[" + i + "] is null or empty");
|
491 |
|
|
}
|
492 |
|
|
}
|
493 |
|
|
this.options = options;
|
494 |
|
|
this.selection = selectedOption;
|
495 |
|
|
}
|
496 |
|
|
|
497 |
|
|
private void setPrompt(String prompt) throws IllegalArgumentException
|
498 |
|
|
{
|
499 |
|
|
if ((prompt == null) || (prompt.length() == 0))
|
500 |
|
|
{
|
501 |
|
|
throw new IllegalArgumentException("prompt is null or empty");
|
502 |
|
|
}
|
503 |
|
|
this.prompt = prompt;
|
504 |
|
|
}
|
505 |
|
|
}
|