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Diffstat (limited to 'javax/security/auth/callback/ConfirmationCallback.java')
| -rw-r--r-- | javax/security/auth/callback/ConfirmationCallback.java | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/javax/security/auth/callback/ConfirmationCallback.java b/javax/security/auth/callback/ConfirmationCallback.java new file mode 100644 index 000000000..8abd393f5 --- /dev/null +++ b/javax/security/auth/callback/ConfirmationCallback.java @@ -0,0 +1,506 @@ +/* ConfirmationCallback.java -- callback for confirmations. + Copyright (C) 2003, Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.security.auth.callback; + +import java.io.Serializable; + +/** + * Underlying security services instantiate and pass a + * <code>ConfirmationCallback</code> to the <code>handle()</code> method of a + * {@link CallbackHandler} to ask for YES/NO, OK/CANCEL, YES/NO/CANCEL or other + * similar confirmations. + * + * @see CallbackHandler + * @version $Revision: 1.1 $ + */ +public class ConfirmationCallback implements Callback, Serializable +{ + + // Constants and variables + // ------------------------------------------------------------------------- + + /** + * <p>Unspecified option type.</p> + * + * <p>The <code>getOptionType</code> method returns this value if this + * <code>ConfirmationCallback</code> was instantiated with <code>options</code> + * instead of an <code>optionType</code>.</p> + */ + public static final int UNSPECIFIED_OPTION = -1; + + /** + * <p>YES/NO confirmation option.</p> + * + * <p>An underlying security service specifies this as the <code>optionType</code> + * to a <code>ConfirmationCallback</code> constructor if it requires a + * confirmation which can be answered with either <code>YES</code> or + * <code>NO</code>.</p> + */ + public static final int YES_NO_OPTION = 0; + + /** + * <p>YES/NO/CANCEL confirmation confirmation option.</p> + * + * <p>An underlying security service specifies this as the <code>optionType</code> + * to a <code>ConfirmationCallback</code> constructor if it requires a + * confirmation which can be answered with either <code>YES</code>, + * <code>NO</code> or <code>CANCEL</code>. + */ + public static final int YES_NO_CANCEL_OPTION = 1; + + /** + * <p>OK/CANCEL confirmation confirmation option.</p> + * + * <p>An underlying security service specifies this as the <code>optionType</code> + * to a <code>ConfirmationCallback</code> constructor if it requires a + * confirmation which can be answered with either <code>OK</code> or + * <code>CANCEL</code>.</p> + */ + public static final int OK_CANCEL_OPTION = 2; + + /** + * <p>YES option.</p> + * + * <p>If an <code>optionType</code> was specified to this + * <code>ConfirmationCallback</code>, this option may be specified as a + * <code>defaultOption</code> or returned as the selected index.</p> + */ + public static final int YES = 0; + + /** + * <p>NO option.</p> + * + * <p>If an <code>optionType</code> was specified to this + * <code>ConfirmationCallback</code>, this option may be specified as a + * <code>defaultOption</code> or returned as the selected index.</p> + */ + public static final int NO = 1; + + /** + * <p>CANCEL option.</p> + * + * <p>If an <code>optionType</code> was specified to this + * <code>ConfirmationCallback</code>, this option may be specified as a + * <code>defaultOption</code> or returned as the selected index.</p> + */ + public static final int CANCEL = 2; + + /** + * <p>OK option.</p> + * + * <p>If an <code>optionType</code> was specified to this + * <code>ConfirmationCallback</code>, this option may be specified as a + * <code>defaultOption</code> or returned as the selected index.</p> + */ + public static final int OK = 3; + + /** INFORMATION message type. */ + public static final int INFORMATION = 0; + + /** WARNING message type. */ + public static final int WARNING = 1; + + /** ERROR message type. */ + public static final int ERROR = 2; + + /** + * @serial + * @since 1.4 + */ + private String prompt; + + /** + * @serial + * @since 1.4 + */ + private int messageType; + + /** + * @serial + * @since 1.4 + */ + private int optionType; + + /** + * @serial + * @since 1.4 + */ + private int defaultOption; + + /** + * @serial + * @since 1.4 + */ + private String[] options = null; + + /** + * @serial + * @since 1.4 + */ + private int selection; + + // Constructor(s) + // ------------------------------------------------------------------------- + + /** + * <p>Construct a <code>ConfirmationCallback</code> with a message type, an + * option type and a default option.</p> + * + * <p>Underlying security services use this constructor if they require + * either a YES/NO, YES/NO/CANCEL or OK/CANCEL confirmation.</p> + * + * @param messageType the message type (INFORMATION, WARNING or ERROR). + * @param optionType the option type (YES_NO_OPTION, YES_NO_CANCEL_OPTION or + * OK_CANCEL_OPTION). + * @param defaultOption the default option from the provided optionType (YES, + * NO, CANCEL or OK). + * @throws IllegalArgumentException if <code>messageType</code> is not either + * <code>INFORMATION</code>, <code>WARNING</code>, or <code>ERROR</code>, if + * <code>optionType</code> is not either <code>YES_NO_OPTION</code>, + * <code>YES_NO_CANCEL_OPTION</code>, or <code>OK_CANCEL_OPTION</code>, or if + * <code>defaultOption</code> does not correspond to one of the options in + * <code>optionType</code>. + */ + public ConfirmationCallback(int messageType, int optionType, int defaultOption) + throws IllegalArgumentException + { + super(); + + setMessageType(messageType); + setOptionType(optionType, defaultOption); + this.defaultOption = defaultOption; + } + + /** + * <p>Construct a <code>ConfirmationCallback</code> with a message type, a + * list of options and a default option.</p> + * + * <p>Underlying security services use this constructor if they require a + * confirmation different from the available preset confirmations provided + * (for example, CONTINUE/ABORT or STOP/GO). The confirmation options are + * listed in the <code>options</code> array, and are displayed by the + * {@link CallbackHandler} implementation in a manner consistent with the + * way preset options are displayed.</p> + * + * @param messageType the message type (INFORMATION, WARNING or ERROR). + * @param options the list of confirmation options. + * @param defaultOption the default option, represented as an index into the + * <code>options</code> array. + * @throws IllegalArgumentException if <code>messageType</code> is not either + * <code>INFORMATION</code>, <code>WARNING</code>, or <code>ERROR</code>, if + * <code>options</code> is <code>null</code>, if <code>options</code> has a + * length of <code>0</code>, if any element from <code>options</code> is + * <code>null</code>, if any element from <code>options</code> has a length + * of <code>0</code>, or if <code>defaultOption</code> does not lie within + * the array boundaries of <code>options</code>. + */ + public ConfirmationCallback(int messageType, String[] options, int defaultOption) + { + super(); + + setMessageType(messageType); + setOptions(options, defaultOption); + this.defaultOption = defaultOption; + } + + /** + * <p>Construct a <code>ConfirmationCallback</code> with a prompt, message + * type, an option type and a default option.</p> + * + * <p>Underlying security services use this constructor if they require + * either a YES/NO, YES/NO/CANCEL or OK/CANCEL confirmation.</p> + * + * @param prompt the prompt used to describe the list of options. + * @param messageType the message type (INFORMATION, WARNING or ERROR). + * @param optionType the option type (YES_NO_OPTION, YES_NO_CANCEL_OPTION or + * OK_CANCEL_OPTION). + * @param defaultOption the default option from the provided optionType (YES, + * NO, CANCEL or OK). + * @throws IllegalArgumentException if <code>prompt</code> is <code>null</code>, + * if <code>prompt</code> has a length of <code>0</code>, if + * <code>messageType</code> is not either <ode>INFORMATION</code>, + * <code>WARNING</code>, or <code>ERROR</code>, if <code>optionType</code> is + * not either <code>YES_NO_OPTION</code>, <code>YES_NO_CANCEL_OPTION</code>, + * or <code>OK_CANCEL_OPTION</code>, or if <code>defaultOption</code> does + * not correspond to one of the options in <code>optionType</code>. + */ + public ConfirmationCallback(String prompt, int messageType, int optionType, + int defaultOption) + { + super(); + + setPrompt(prompt); + setMessageType(messageType); + setOptionType(optionType, defaultOption); + this.defaultOption = defaultOption; + } + + /** + * <p>Construct a <code>ConfirmationCallback</code> with a prompt, message + * type, a list of options and a default option.</p> + * + * <p>Underlying security services use this constructor if they require a + * confirmation different from the available preset confirmations provided + * (for example, CONTINUE/ABORT or STOP/GO). The confirmation options are + * listed in the <code>options</code> array, and are displayed by the + * {@link CallbackHandler} implementation in a manner consistent with the + * way preset options are displayed.</p> + * + * @param prompt the prompt used to describe the list of options. + * @param messageType the message type (INFORMATION, WARNING or ERROR). + * @param options the list of confirmation options. + * @param defaultOption the default option, represented as an index into the + * <code>options</code> array. + * @throws IllegalArgumentException if <code>prompt</code> is <code>null</code>, + * if <code>prompt</code> has a length of <code>0</code>, if + * <code>messageType</code> is not either <ode>INFORMATION</code>, + * <code>WARNING</code>, or <code>ERROR</code>, if <code>options</code> is + * <code>null</code>, if <code>options</code> has a length of <code>0</code>, + * if any element from <code>options</code> is <code>null</code>, if any + * element from <code>options</code> has a length of <code>0</code>, or if + * <code>defaultOption</code> does not lie within the array boundaries of + * <code>options</code>. + */ + public ConfirmationCallback(String prompt, int messageType, String[] options, + int defaultOption) + { + super(); + + setPrompt(prompt); + setMessageType(messageType); + setOptions(options, defaultOption); + this.defaultOption = defaultOption; + } + + // Class methods + // ------------------------------------------------------------------------- + + // Instance methods + // ------------------------------------------------------------------------- + + /** + * Get the prompt. + * + * @return the prompt, or <code>null</code> if this + * <code>ConfirmationCallback</code> was instantiated without a prompt. + */ + public String getPrompt() + { + return prompt; + } + + /** + * Get the message type. + * + * @return the message type (INFORMATION, WARNING or ERROR). + */ + public int getMessageType() + { + return messageType; + } + + /** + * <p>Get the option type.</p> + * + * <p>If this method returns {@link #UNSPECIFIED_OPTION}, then this + * <code>ConfirmationCallback</code> was instantiated with <code>options</code> + * instead of an <code>optionType</code>. In this case, invoke the + * {@link #getOptions()} method to determine which confirmation options to + * display.</p> + * + * @return the option type (YES_NO_OPTION, YES_NO_CANCEL_OPTION or + * OK_CANCEL_OPTION), or UNSPECIFIED_OPTION if this + * <code>ConfirmationCallback</code> was instantiated with <code>options</code> + * instead of an <code>optionType</code>. + */ + public int getOptionType() + { + if (options != null) + { + return UNSPECIFIED_OPTION; + } + return optionType; + } + + /** + * Get the confirmation options. + * + * @return the list of confirmation options, or <code>null</code> if this + * <code>ConfirmationCallback</code> was instantiated with an + * <code>optionType</code> instead of <code>options</code>. + */ + public String[] getOptions() + { + return options; + } + + /** + * Get the default option. + * + * @return the default option, represented as <code>YES</code>, <code>NO</code>, + * <code>OK</code> or <code>CANCEL</code> if an <code>optionType</code> was + * specified to the constructor of this <code>ConfirmationCallback</code>. + * Otherwise, this method returns the default option as an index into the + * <code>options</code> array specified to the constructor of this + * <code>ConfirmationCallback</code>. + */ + public int getDefaultOption() + { + return defaultOption; + } + + /** + * Set the selected confirmation option. + * + * @param selection the selection represented as <code>YES</code>, + * <code>NO</code>, <code>OK</code> or <code>CANCEL</code> if an + * <code>optionType</code> was specified to the constructor of this + * <code>ConfirmationCallback</code>. Otherwise, the <code>selection</code> + * represents the index into the <code>options</code> array specified to the + * constructor of this <code>ConfirmationCallback</code>. + * @see #getSelectedIndex() + */ + public void setSelectedIndex(int selection) + { + if (options != null) + { + setOptions(options, selection); + } + else + { + setOptionType(optionType, selection); + } + } + + /** + * Get the selected confirmation option. + * + * @return the selected confirmation option represented as <code>YES</code>, + * <code>NO</code>, <code>OK</code> or <code>CANCEL</code> if an + * <code>optionType</code> was specified to the constructor of this + * <code>ConfirmationCallback</code>. Otherwise, this method returns the + * selected confirmation option as an index into the <code>options</code> + * array specified to the constructor of this <code>ConfirmationCallback</code>. + * @see #setSelectedIndex(int) + */ + public int getSelectedIndex() + { + return this.selection; + } + + private void setMessageType(int messageType) throws IllegalArgumentException + { + switch (messageType) + { + case INFORMATION: + case WARNING: + case ERROR: this.messageType = messageType; break; + default: throw new IllegalArgumentException("illegal message type"); + } + } + + private void setOptionType(int optionType, int selectedOption) + throws IllegalArgumentException + { + switch (optionType) + { + case YES_NO_OPTION: + this.optionType = optionType; + switch (selectedOption) + { + case YES: + case NO: this.selection = selectedOption; break; + default: throw new IllegalArgumentException("invalid option"); + } + break; + case YES_NO_CANCEL_OPTION: + this.optionType = optionType; + switch (selectedOption) + { + case YES: + case NO: + case CANCEL: this.selection = selectedOption; break; + default: throw new IllegalArgumentException("invalid option"); + } + break; + case OK_CANCEL_OPTION: + this.optionType = optionType; + switch (selectedOption) + { + case OK: + case CANCEL: this.selection = selectedOption; break; + default: throw new IllegalArgumentException("invalid option"); + } + break; + default: + throw new IllegalArgumentException("illegal option type"); + } + } + + private void setOptions(String[] options, int selectedOption) + throws IllegalArgumentException + { + if ((selectedOption < 0) || (selectedOption > options.length - 1)) + { + throw new IllegalArgumentException("invalid selection"); + } + if ((options == null) || (options.length == 0)) + { + throw new IllegalArgumentException("options is null or empty"); + } + for (int i = 0; i < options.length; i++) + { + if ((options[i] == null) || (options[i].length() == 0)) + { + throw new IllegalArgumentException("options[" + i + "] is null or empty"); + } + } + this.options = options; + this.selection = selectedOption; + } + + private void setPrompt(String prompt) throws IllegalArgumentException + { + if ((prompt == null) || (prompt.length() == 0)) + { + throw new IllegalArgumentException("prompt is null or empty"); + } + this.prompt = prompt; + } +} |