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package net.rubyeye.xmemcached.auth;

import java.io.IOException;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;

/**
 * A callback handler for name/password authentication
 * 
 * @author dennis
 * 
 */
public class PlainCallbackHandler implements CallbackHandler {
  private String username;
  private String password;

  public PlainCallbackHandler(String username, String password) {
    super();
    this.username = username;
    this.password = password;
  }

  public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
    for (Callback callback : callbacks) {
      if (callback instanceof NameCallback) {
        ((NameCallback) callback).setName(this.username);
      } else if (callback instanceof PasswordCallback) {
        ((PasswordCallback) callback).setPassword(password.toCharArray());
      } else
        throw new UnsupportedCallbackException(callback);
    }

  }

}