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## javax.security.auth.callback
Class ChoiceCallback

    java.lang.Object
      javax.security.auth.callback.ChoiceCallback

All Implemented Interfaces:
  Serializable, Callback

Direct Known Subclasses:
  RealmChoiceCallback

    public class ChoiceCallback

extends Object
implements Callback, Serializable

Underlying security services instantiate and pass a `ChoiceCallback` to the `handle` method of a `CallbackHandler` to display a list of choices and to retrieve the selected choice(s).

See Also:
  `CallbackHandler`, Serialized Form

Constructor Summary
`ChoiceCallback(String prompt, String[] choices, int defaultChoice, boolean multipleSelectionsAllowed)` Construct a `ChoiceCallback` with a prompt, a list of choices, a default choice, and a boolean specifying whether or not multiple selections from the list of choices are allowed.

Method Summary
`boolean` | `allowMultipleSelections()` Get the boolean determining whether multiple selections from the `choices` list are allowed.
`String[]` | `getChoices()` Get the list of choices.
`int` | `getDefaultChoice()` Get the defaultChoice.
`String` | `getPrompt()` Get the prompt.
`int[]` | `getSelectedIndexes()` Get the selected choices.
`void` | `setSelectedIndex(int selection)` Set the selected choice.
`void` | `setSelectedIndexes(int[] selections)` Set the selected choices.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ChoiceCallback

    public ChoiceCallback(String prompt,
                          String[] choices,
                          int defaultChoice,
                          boolean multipleSelectionsAllowed)

  Construct a `ChoiceCallback` with a prompt, a list of choices, a default choice, and a boolean specifying whether or not multiple selections from the list of choices are allowed.

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

    `choices` - the list of choices.

    `defaultChoice` - the choice to be used as the default choice when the list of choices are displayed. This value is represented as an index into the `choices` array.

    `multipleSelectionsAllowed` - boolean specifying whether or not multiple selections can be made from the list of choices.
  Throws:
    `IllegalArgumentException` - if `prompt` is null, if `prompt` has a length of 0, if `choices` is null, if `choices` has a length of 0, if any element from `choices` is null, if any element from `choices` has a length of 0 or if `defaultChoice` does not fall within the array boundaries of `choices`.

Method Detail

### getPrompt

    public String getPrompt()

  Get the prompt.

  Returns:
    the prompt.

### getChoices

    public String[] getChoices()

  Get the list of choices.

  Returns:
    the list of choices.

### getDefaultChoice

    public int getDefaultChoice()

  Get the defaultChoice.

  Returns:
    the defaultChoice, represented as an index into the `choices` list.

### allowMultipleSelections

    public boolean allowMultipleSelections()

  Get the boolean determining whether multiple selections from the `choices` list are allowed.

  Returns:
    whether multiple selections are allowed.

### setSelectedIndex

    public void setSelectedIndex(int selection)

  Set the selected choice.

  Parameters:
    `selection` - the selection represented as an index into the `choices` list.
  See Also:
    `getSelectedIndexes()`

### setSelectedIndexes

    public void setSelectedIndexes(int[] selections)

  Set the selected choices.

  Parameters:
    `selections` - the selections represented as indexes into the `choices` list.
  Throws:
    `UnsupportedOperationException` - if multiple selections are not allowed, as determined by `allowMultipleSelections`.
  See Also:
    `getSelectedIndexes()`

### getSelectedIndexes

    public int[] getSelectedIndexes()

  Get the selected choices.

  Returns:
    the selected choices, represented as indexes into the `choices` list.
  See Also:
    `setSelectedIndexes(int[])`

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.