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Java > Open Source Codes > org > apache > tapestry > vlib > ActivatePage


1 // Copyright 2004 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.vlib;
16
17 import org.apache.tapestry.PageRedirectException;
18 import org.apache.tapestry.event.PageEvent;
19 import org.apache.tapestry.event.PageValidateListener;
20 import org.apache.tapestry.vlib.pages.Login;
21
22 /**
23  * Subclass of {@link org.apache.tapestry.vlib.Protected} that
24  * implements {@link org.apache.tapestry.vlib.IActivate}. Overrides
25  * {@link #validate(org.apache.tapestry.IRequestCycle)}.
26  *
27  * @author Howard Lewis Ship
28  * @version $Id: ActivatePage.java,v 1.7 2004/02/19 17:37:49 hlship Exp $
29  * @since 3.0
30  *
31  **/
32
33 public abstract class ActivatePage extends Protected implements IActivate, PageValidateListener
34 {
35     public void pageValidate(PageEvent event)
36     {
37         Visit visit = (Visit) getVisit();
38
39         if (visit != null && visit.isUserLoggedIn())
40             return;
41
42         // User not logged in ... redirect through the Login page.
43
44         Login login = (Login) getRequestCycle().getPage("Login");
45
46         login.setCallback(new ActivateCallback(this));
47
48         throw new PageRedirectException(login);
49     }
50 }
51
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