javax.security.auth.callback

## Class ConfirmationCallback

- java.lang.Object
- - javax.security.auth.callback.ConfirmationCallback

- All Implemented Interfaces:
    Serializable, Callback

      public class ConfirmationCallback
      extends Object
      implements Callback, Serializable

  Underlying security services instantiate and pass a `ConfirmationCallback` to the `handle` method of a `CallbackHandler` to ask for YES/NO, OK/CANCEL, YES/NO/CANCEL or other similar confirmations.

  See Also:
    `CallbackHandler`, Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `CANCEL` CANCEL option.
    `static int` | `ERROR` ERROR message type.
    `static int` | `INFORMATION` INFORMATION message type.
    `static int` | `NO` NO option.
    `static int` | `OK` OK option.
    `static int` | `OK_CANCEL_OPTION` OK/CANCEL confirmation confirmation option.
    `static int` | `UNSPECIFIED_OPTION` Unspecified option type.
    `static int` | `WARNING` WARNING message type.
    `static int` | `YES` YES option.
    `static int` | `YES_NO_CANCEL_OPTION` YES/NO/CANCEL confirmation confirmation option.
    `static int` | `YES_NO_OPTION` YES/NO confirmation option.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConfirmationCallback(int messageType, int optionType, int defaultOption)` Construct a `ConfirmationCallback` with a message type, an option type and a default option.
    `ConfirmationCallback(int messageType, String[] options, int defaultOption)` Construct a `ConfirmationCallback` with a message type, a list of options and a default option.
    `ConfirmationCallback(String prompt, int messageType, int optionType, int defaultOption)` Construct a `ConfirmationCallback` with a prompt, message type, an option type and a default option.
    `ConfirmationCallback(String prompt, int messageType, String[] options, int defaultOption)` Construct a `ConfirmationCallback` with a prompt, message type, a list of options and a default option.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `getDefaultOption()` Get the default option.
    `int` | `getMessageType()` Get the message type.
    `String[]` | `getOptions()` Get the confirmation options.
    `int` | `getOptionType()` Get the option type.
    `String` | `getPrompt()` Get the prompt.
    `int` | `getSelectedIndex()` Get the selected confirmation option.
    `void` | `setSelectedIndex(int selection)` Set the selected confirmation option.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### UNSPECIFIED_OPTION

          public static final int UNSPECIFIED_OPTION

      Unspecified option type.

      The `getOptionType` method returns this value if this `ConfirmationCallback` was instantiated with `options` instead of an `optionType`.

      See Also:
        Constant Field Values

    - #### YES_NO_OPTION

          public static final int YES_NO_OPTION

      YES/NO confirmation option.

      An underlying security service specifies this as the `optionType` to a `ConfirmationCallback` constructor if it requires a confirmation which can be answered with either `YES` or `NO`.

      See Also:
        Constant Field Values

    - #### YES_NO_CANCEL_OPTION

          public static final int YES_NO_CANCEL_OPTION

      YES/NO/CANCEL confirmation confirmation option.

      An underlying security service specifies this as the `optionType` to a `ConfirmationCallback` constructor if it requires a confirmation which can be answered with either `YES`, `NO` or `CANCEL`.

      See Also:
        Constant Field Values

    - #### OK_CANCEL_OPTION

          public static final int OK_CANCEL_OPTION

      OK/CANCEL confirmation confirmation option.

      An underlying security service specifies this as the `optionType` to a `ConfirmationCallback` constructor if it requires a confirmation which can be answered with either `OK` or `CANCEL`.

      See Also:
        Constant Field Values

    - #### YES

          public static final int YES

      YES option.

      If an `optionType` was specified to this `ConfirmationCallback`, this option may be specified as a `defaultOption` or returned as the selected index.

      See Also:
        Constant Field Values

    - #### NO

          public static final int NO

      NO option.

      If an `optionType` was specified to this `ConfirmationCallback`, this option may be specified as a `defaultOption` or returned as the selected index.

      See Also:
        Constant Field Values

    - #### CANCEL

          public static final int CANCEL

      CANCEL option.

      If an `optionType` was specified to this `ConfirmationCallback`, this option may be specified as a `defaultOption` or returned as the selected index.

      See Also:
        Constant Field Values

    - #### OK

          public static final int OK

      OK option.

      If an `optionType` was specified to this `ConfirmationCallback`, this option may be specified as a `defaultOption` or returned as the selected index.

      See Also:
        Constant Field Values

    - #### INFORMATION

          public static final int INFORMATION

      INFORMATION message type.
      See Also:
        Constant Field Values

    - #### WARNING

          public static final int WARNING

      WARNING message type.
      See Also:
        Constant Field Values

    - #### ERROR

          public static final int ERROR

      ERROR message type.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### ConfirmationCallback

          public ConfirmationCallback(int messageType,
                              int optionType,
                              int defaultOption)

      Construct a `ConfirmationCallback` with a message type, an option type and a default option.

      Underlying security services use this constructor if they require either a YES/NO, YES/NO/CANCEL or OK/CANCEL confirmation.

      Parameters:
        `messageType` - the message type (`INFORMATION`, `WARNING` or `ERROR`).

        `optionType` - the option type (`YES_NO_OPTION`, `YES_NO_CANCEL_OPTION` or `OK_CANCEL_OPTION`).

        `defaultOption` - the default option from the provided optionType (`YES`, `NO`, `CANCEL` or `OK`).
      Throws:
        `IllegalArgumentException` - if messageType is not either `INFORMATION`, `WARNING`, or `ERROR`, if optionType is not either `YES_NO_OPTION`, `YES_NO_CANCEL_OPTION`, or `OK_CANCEL_OPTION`, or if `defaultOption` does not correspond to one of the options in `optionType`.

    - #### ConfirmationCallback

          public ConfirmationCallback(int messageType,
                              String[] options,
                              int defaultOption)

      Construct a `ConfirmationCallback` with a message type, a list of options and a default option.

      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 `options` array, and are displayed by the `CallbackHandler` implementation in a manner consistent with the way preset options are displayed.

      Parameters:
        `messageType` - the message type (`INFORMATION`, `WARNING` or `ERROR`).

        `options` - the list of confirmation options.

        `defaultOption` - the default option, represented as an index into the `options` array.
      Throws:
        `IllegalArgumentException` - if messageType is not either `INFORMATION`, `WARNING`, or `ERROR`, if `options` is null, if `options` has a length of 0, if any element from `options` is null, if any element from `options` has a length of 0, or if `defaultOption` does not lie within the array boundaries of `options`.

    - #### ConfirmationCallback

          public ConfirmationCallback(String prompt,
                              int messageType,
                              int optionType,
                              int defaultOption)

      Construct a `ConfirmationCallback` with a prompt, message type, an option type and a default option.

      Underlying security services use this constructor if they require either a YES/NO, YES/NO/CANCEL or OK/CANCEL confirmation.

      Parameters:
        `prompt` - the prompt used to describe the list of options.

        `messageType` - the message type (`INFORMATION`, `WARNING` or `ERROR`).

        `optionType` - the option type (`YES_NO_OPTION`, `YES_NO_CANCEL_OPTION` or `OK_CANCEL_OPTION`).

        `defaultOption` - the default option from the provided optionType (`YES`, `NO`, `CANCEL` or `OK`).
      Throws:
        `IllegalArgumentException` - if `prompt` is null, if `prompt` has a length of 0, if messageType is not either `INFORMATION`, `WARNING`, or `ERROR`, if optionType is not either `YES_NO_OPTION`, `YES_NO_CANCEL_OPTION`, or `OK_CANCEL_OPTION`, or if `defaultOption` does not correspond to one of the options in `optionType`.

    - #### ConfirmationCallback

          public ConfirmationCallback(String prompt,
                              int messageType,
                              String[] options,
                              int defaultOption)

      Construct a `ConfirmationCallback` with a prompt, message type, a list of options and a default option.

      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 `options` array, and are displayed by the `CallbackHandler` implementation in a manner consistent with the way preset options are displayed.

      Parameters:
        `prompt` - the prompt used to describe the list of options.

        `messageType` - the message type (`INFORMATION`, `WARNING` or `ERROR`).

        `options` - the list of confirmation options.

        `defaultOption` - the default option, represented as an index into the `options` array.
      Throws:
        `IllegalArgumentException` - if `prompt` is null, if `prompt` has a length of 0, if messageType is not either `INFORMATION`, `WARNING`, or `ERROR`, if `options` is null, if `options` has a length of 0, if any element from `options` is null, if any element from `options` has a length of 0, or if `defaultOption` does not lie within the array boundaries of `options`.

  - ### Method Detail

    - #### getPrompt

          public String getPrompt()

      Get the prompt.

      Returns:
        the prompt, or null if this `ConfirmationCallback` was instantiated without a `prompt`.

    - #### getMessageType

          public int getMessageType()

      Get the message type.

      Returns:
        the message type (`INFORMATION`, `WARNING` or `ERROR`).

    - #### getOptionType

          public int getOptionType()

      Get the option type.

      If this method returns `UNSPECIFIED_OPTION`, then this `ConfirmationCallback` was instantiated with `options` instead of an `optionType`. In this case, invoke the `getOptions` method to determine which confirmation options to display.

      Returns:
        the option type (`YES_NO_OPTION`, `YES_NO_CANCEL_OPTION` or `OK_CANCEL_OPTION`), or `UNSPECIFIED_OPTION` if this `ConfirmationCallback` was instantiated with `options` instead of an `optionType`.

    - #### getOptions

          public String[] getOptions()

      Get the confirmation options.

      Returns:
        the list of confirmation options, or null if this `ConfirmationCallback` was instantiated with an `optionType` instead of `options`.

    - #### getDefaultOption

          public int getDefaultOption()

      Get the default option.

      Returns:
        the default option, represented as `YES`, `NO`, `OK` or `CANCEL` if an `optionType` was specified to the constructor of this `ConfirmationCallback`. Otherwise, this method returns the default option as an index into the `options` array specified to the constructor of this `ConfirmationCallback`.

    - #### setSelectedIndex

          public void setSelectedIndex(int selection)

      Set the selected confirmation option.

      Parameters:
        `selection` - the selection represented as `YES`, `NO`, `OK` or `CANCEL` if an `optionType` was specified to the constructor of this `ConfirmationCallback`. Otherwise, the selection represents the index into the `options` array specified to the constructor of this `ConfirmationCallback`.
      See Also:
        `getSelectedIndex()`

    - #### getSelectedIndex

          public int getSelectedIndex()

      Get the selected confirmation option.

      Returns:
        the selected confirmation option represented as `YES`, `NO`, `OK` or `CANCEL` if an `optionType` was specified to the constructor of this `ConfirmationCallback`. Otherwise, this method returns the selected confirmation option as an index into the `options` array specified to the constructor of this `ConfirmationCallback`.
      See Also:
        `setSelectedIndex(int)`

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