simplecallbackhandler.java

关于 Jaoso新闻文章发布系统 --- --- --- --- --- --- --- --- --- --- --- --- --- -- 版本信息：Jaoso新闻文章发布系统 0.9.1b

package jaoso.framework.security.impl;

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 simple CallbackHandler that handles name and password
 *
 *
 * @author Charles Huang
 * @since JDK1.4
 * @version $Id: SimpleCallbackHandler.java,v 1.1.1.1 2004/02/04 03:52:13 mustang Exp $
 */
public class SimpleCallbackHandler implements CallbackHandler {

    //~ Instance fields ========================================================

    /** DOCUMENT ME! */
    private String password;

    /** DOCUMENT ME! */
    private String username;

    //~ Constructors ===========================================================

    /**
     * Creates a new SimpleCallbackHandler object.
     *
     * @param arg0 DOCUMENT ME!
     * @param arg1 DOCUMENT ME!
     */
    public SimpleCallbackHandler(final String arg0, final String arg1) {

        this.username = arg0;
        this.password = arg1;
    }

    //~ Methods ================================================================

    /**
     * This handler only hanldes name and password
     *
     * @param callbacks an array of <code>Callback</code> objects provided by
     *        an underlying security service which contains the information
     *        requested to be retrieved or displayed.
     *
     * @exception java.io.IOException if an input or output error occurs. <p>
     * @exception UnsupportedCallbackException if the implementation of this
     *            method does not support one or more of the Callbacks
     *            specified in the <code>callbacks</code> parameter.
     */
    public final void handle(final Callback[] callbacks)
        throws IOException, UnsupportedCallbackException {

        for (int index = 0; index < callbacks.length; index++) {

            if (callbacks[index] instanceof NameCallback) {

                NameCallback ncb = (NameCallback) callbacks[index];
                ncb.setName(username);
            }

            if (callbacks[index] instanceof PasswordCallback) {

                PasswordCallback pcb = (PasswordCallback) callbacks[index];
                pcb.setPassword(password.toCharArray());
            }
        }
    }
}