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Java > Open Source Codes > org > apache > turbine > modules > layouts > JspLayout


1 package org.apache.turbine.modules.layouts;
2
3 /*
4  * Copyright 2001-2004 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License")
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import org.apache.turbine.TurbineConstants;
20 import org.apache.turbine.modules.Layout;
21 import org.apache.turbine.services.jsp.TurbineJsp;
22 import org.apache.turbine.services.jsp.util.JspNavigation;
23 import org.apache.turbine.services.jsp.util.JspScreenPlaceholder;
24 import org.apache.turbine.util.RunData;
25
26 /**
27  * This Layout module allows JSP templates to be used as layouts. Since
28  * dynamic content is supposed to be primarily located in screens and
29  * navigations there should be relatively few reasons to subclass this Layout.
30  *
31  * @author <a HREF="mailto:john.mcnally@clearink.com">John D. McNally</a>
32  * @author <a HREF="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
33  * @version $Id: JspLayout.java,v 1.7.2.2 2004/05/20 03:03:54 seade Exp $
34  */
35 public class JspLayout
36     extends Layout
37 {
38     /** The prefix for lookup up layout pages */
39     private String JavaDoc prefix = TurbineConstants.LAYOUT_PREFIX + "/";
40
41     /**
42      * Method called by LayoutLoader.
43      *
44      * @param data RunData
45      * @throws Exception generic exception
46      */
47     public void doBuild(RunData data)
48         throws Exception JavaDoc
49     {
50         data.getResponse().setContentType("text/html");
51         data.declareDirectResponse();
52
53         // variable to reference the screen in the layout template
54 data.getRequest()
55             .setAttribute(TurbineConstants.SCREEN_PLACEHOLDER,
56                           new JspScreenPlaceholder(data));
57
58         // variable to reference the navigations in the layout template
59 data.getRequest().setAttribute(
60             TurbineConstants.NAVIGATION_PLACEHOLDER,
61             new JspNavigation(data));
62
63         // Grab the layout template set in the TemplatePage.
64 String JavaDoc templateName = data.getTemplateInfo().getLayoutTemplate();
65
66         TurbineJsp.handleRequest(data, prefix + templateName, true);
67     }
68 }
69
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