Java 2 Platform EE v1.3: Class ChoiceCallback - Java Platform, Enterprise Edition v1.3.1 API Specifications

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javax.security.auth.callback
Class ChoiceCallback

java.lang.Object
  |
  +--javax.security.auth.callback.ChoiceCallback

All Implemented Interfaces:: Callback

public class ChoiceCallback
extends java.lang.Object
implements Callback

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

See Also:: CallbackHandler

Constructor Summary

ChoiceCallback(java.lang.String prompt, java.lang.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.

java.lang.String[] getChoices()
          Get the list of choices.

int getDefaultChoice()
          Get the defaultChoice.

java.lang.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(java.lang.String prompt,
                      java.lang.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:: java.lang.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 java.lang.String getPrompt()

Get the prompt.

Returns:: the prompt.

getChoices

public java.lang.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.

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.

getSelectedIndexes

public int[] getSelectedIndexes()

Get the selected choices.

Returns:: the selected choices, represented as indexes into the choices list.