simplecallbackhandler.java

Jaoso新闻文章发布系统 0.9.1final 程序架构: Struts+Spring+Hibernate 主要功能： ·新闻采用在线编辑器,可以象使用word一样编辑新闻,可简繁

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

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

	/**
	 * 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;
	}

	/**
	 * 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());
			}
		}
	}
}