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CallbackHandler


javax.security.auth.callback

Interface CallbackHandler

  • All Known Implementing Classes:
    tmpCallbackHandler


    public interface CallbackHandler
    Needs to be implemented by classes that want to handle authentication Callbacks. A single method handle(Callback[]) must be provided that checks the type of the incoming Callbacks and reacts accordingly. CallbackHandlers can be installed per application. It is also possible to configure a system-default CallbackHandler by setting the auth.login.defaultCallbackHandler property in the standard security.properties file.
    • Method Summary

      Methods
      Modifier and Type Method and Description
      void handle(Callback[] callbacks)
      Handles the actual Callback.
    • Method Detail

      • handle

        void handle(Callback[] callbacks)
                    throws IOException,
                           UnsupportedCallbackException
        Handles the actual Callback. A CallbackHandler needs to implement this method. In the method, it is free to select which Callbacks it actually wants to handle and in which way. For example, a console-based CallbackHandler might choose to sequentially ask the user for login and password, if it implements these Callback s, whereas a GUI-based one might open a single dialog window for both values. If a CallbackHandler is not able to handle a specific Callback, it needs to throw an UnsupportedCallbackException.
        Parameters:
        callbacks - the array of Callbacks that need handling
        Throws:
        IOException - if an I/O related error occurs
        UnsupportedCallbackException - if the CallbackHandler is not able to handle a specific Callback


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