Overview  Package   Class  Use  Deprecated  Index
Home >> All >> [ common overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

common
Class STProjectLoginContext.CBH  

java.lang.Object
  common.STProjectLoginContext.CBH

All Implemented Interfaces:

javax.security.auth.callback.CallbackHandler

Enclosing class:

STProjectLoginContext

---

private static class STProjectLoginContext.CBH

extends java.lang.Object

implements javax.security.auth.callback.CallbackHandler

---

Constructor Summary
private	STProjectLoginContext.CBH()

 

Method Summary
void	handle(javax.security.auth.callback.Callback[] callbacks)           Retrieve or display the information requested in the provided javax.security.auth.callback.Callbacks.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

STProjectLoginContext.CBH

private STProjectLoginContext.CBH()

Method Detail

handle

public void handle(javax.security.auth.callback.Callback[] callbacks)
            throws javax.security.auth.callback.UnsupportedCallbackException,
                   java.io.IOException

Description copied from interface: javax.security.auth.callback.CallbackHandler

Retrieve or display the information requested in the provided javax.security.auth.callback.Callbacks.

The handle() method implementation checks the instance(s) of the javax.security.auth.callback.Callback object(s) passed in to retrieve or display the requested information. The following example is provided to help demonstrate what an handle() method implementation might look like. This example code is for guidance only. Many details, including proper error handling, are left out for simplicity.

public void handle(Callback[] callbacks)
throws IOException, UnsupportedCallbackException {
   for (int i = 0; i < callbacks.length; i++) {
      if (callbacks[i] instanceof TextOutputCallback) {
         // display the message according to the specified type
         TextOutputCallback toc = (TextOutputCallback)callbacks[i];
         switch (toc.getMessageType()) {
         case TextOutputCallback.INFORMATION:
            System.out.println(toc.getMessage());
            break;
         case TextOutputCallback.ERROR:
            System.out.println("ERROR: " + toc.getMessage());
            break;
         case TextOutputCallback.WARNING:
            System.out.println("WARNING: " + toc.getMessage());
            break;
         default:
            throw new IOException("Unsupported message type: "
                  + toc.getMessageType());
         }
      } else if (callbacks[i] instanceof NameCallback) {
         // prompt the user for a username
         NameCallback nc = (NameCallback)callbacks[i];
         // ignore the provided defaultName
         System.err.print(nc.getPrompt());
         System.err.flush();
         nc.setName((new BufferedReader(
               new InputStreamReader(System.in))).readLine());
      } else if (callbacks[i] instanceof PasswordCallback) {
         // prompt the user for sensitive information
         PasswordCallback pc = (PasswordCallback)callbacks[i];
         System.err.print(pc.getPrompt());
         System.err.flush();
         pc.setPassword(readPassword(System.in));
      } else {
         throw new UnsupportedCallbackException(
               callbacks[i], "Unrecognized Callback");
      }
   }
}

 // Reads user password from given input stream.
private char[] readPassword(InputStream in) throws IOException {
   // insert code to read a user password from the input stream
}
 

Specified by:

handle in interface javax.security.auth.callback.CallbackHandler

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> [ common overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---