signin.java

Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容易而轻松。 Wicket利用一个POJO data beans组件使得它可以与任何持久层技术相结合。

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.wicket.examples.signin;

import org.apache.wicket.PageParameters;
import org.apache.wicket.examples.WicketExamplePage;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.PasswordTextField;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.util.value.ValueMap;


/**
 * Simple example of a sign in page.
 * 
 * @author Jonathan Locke
 */
public final class SignIn extends WicketExamplePage
{
	/**
	 * Constructor
	 */
	public SignIn()
	{
		this(null);
	}

	/**
	 * Constructor
	 * 
	 * @param parameters
	 *            The page parameters
	 */
	public SignIn(final PageParameters parameters)
	{
		// Create feedback panel and add to page
		final FeedbackPanel feedback = new FeedbackPanel("feedback");

		add(feedback);

		// Add sign-in form to page, passing feedback panel as validation error
		// handler
		add(new SignInForm("signInForm"));
	}

	/**
	 * Sign in form
	 * 
	 * @author Jonathan Locke
	 */
	public final class SignInForm extends Form
	{
		// El-cheapo model for form
		private final ValueMap properties = new ValueMap();

		/**
		 * Constructor
		 * 
		 * @param id
		 *            id of the form component
		 */
		public SignInForm(final String id)
		{
			super(id);

			// Attach textfield components that edit properties map model
			add(new TextField("username", new PropertyModel(properties, "username")));
			add(new PasswordTextField("password", new PropertyModel(properties, "password")));
		}

		/**
		 * @see org.apache.wicket.markup.html.form.Form#onSubmit()
		 */
		public final void onSubmit()
		{
			// Get session info
			SignInSession session = (SignInSession)getSession();

			// Sign the user in
			if (session.authenticate(properties.getString("username"), properties
					.getString("password")))
			{
				if (!continueToOriginalDestination())
				{
					setResponsePage(getApplication().getHomePage());
				}
			}
			else
			{
				// Form method that will notify feedback panel
				// Try the component based localizer first. If not found try the
				// application localizer. Else use the default
				final String errmsg = getLocalizer().getString("loginError", this,
						"Unable to sign you in");
				error(errmsg);
			}
		}
	}
}