TextOutputCallback (Java SE 12 & JDK 12 )
Keywords: javax.security.auth.callback.TextOutputCallback class

Module java.base
Package javax.security.auth.callback

## Class TextOutputCallback

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

- All Implemented Interfaces:
    `Serializable`, `Callback`

      public class TextOutputCallback
      extends Object
      implements Callback, Serializable

  Underlying security services instantiate and pass a `TextOutputCallback` to the `handle` method of a `CallbackHandler` to display information messages, warning messages and error messages.

  Since:
    1.4
  See Also:
    `CallbackHandler`, Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static int` | `ERROR` | Error message.
    `static int` | `INFORMATION` | Information message.
    `static int` | `WARNING` | Warning message.

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `TextOutputCallback​(int messageType, String message)` | Construct a TextOutputCallback with a message type and message to be displayed.

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `String` | `getMessage()` | Get the message to be displayed.
    `int` | `getMessageType()` | Get the message type.

    - ### Methods declared in class java.lang.Object

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

- - ### Field Detail

    - #### INFORMATION

          public static final int INFORMATION

      Information message.
      See Also:
        Constant Field Values

    - #### WARNING

          public static final int WARNING

      Warning message.
      See Also:
        Constant Field Values

    - #### ERROR

          public static final int ERROR

      Error message.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### TextOutputCallback

          public TextOutputCallback​(int messageType,
                                    String message)

      Construct a TextOutputCallback with a message type and message to be displayed.
      Parameters:
        `messageType` - the message type (`INFORMATION`, `WARNING` or `ERROR`).
        `message` - the message to be displayed.
      Throws:
        `IllegalArgumentException` - if `messageType` is not either `INFORMATION`, `WARNING` or `ERROR`, if `message` is null, or if `message` has a length of 0.

  - ### Method Detail

    - #### getMessageType

          public int getMessageType()

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

    - #### getMessage

          public String getMessage()

      Get the message to be displayed.
      Returns:
        the message to be displayed.