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Java > Open Source Codes > org > apache > jetspeed > portal > portlets > PreviewPortlet


1 package org.apache.jetspeed.portal.portlets;
2
3 /*
4  * Copyright 2000-2001,2004 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 // jetspeed
20 import org.apache.jetspeed.portal.Portlet;
21 import org.apache.jetspeed.services.PortletFactory;
22 import org.apache.jetspeed.portal.PortletControl;
23 import org.apache.jetspeed.services.PortalToolkit;
24 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
25 import org.apache.jetspeed.services.logging.JetspeedLogger;
26 import org.apache.jetspeed.services.rundata.JetspeedRunData;
27 import org.apache.jetspeed.util.template.JetspeedLink;
28 import org.apache.jetspeed.util.template.JetspeedLinkFactory;
29
30 // ecs
31 import org.apache.jetspeed.util.JetspeedClearElement;
32 import org.apache.ecs.ConcreteElement;
33
34 // turbine
35 import org.apache.turbine.util.RunData;
36 import org.apache.turbine.services.velocity.TurbineVelocity;
37 import org.apache.velocity.context.Context;
38
39 /**
40  * Preview portlet. Displays content of potlet
41  * defined in parameter "previewedPortletName".
42  *
43  * @version $Id: PreviewPortlet.java,v 1.5 2004/02/23 04:03:33 jford Exp $
44  * @author <a HREF="mailto:taylor@apache.org">David Sean Taylor</a>
45  * @author <a HREF="mailto:mark_orciuch@ngsltd.com">Mark Orciuch</a>
46  */
47 public class PreviewPortlet extends AbstractPortlet
48 {
49
50     /**
51      * Static initialization of the logger for this class
52      */
53     private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(PreviewPortlet.class.getName());
54     
55     /**
56      * @param rundata The RunData object for the current request
57      */
58     public ConcreteElement getContent(RunData rundata)
59     {
60
61         Context context = TurbineVelocity.getContext(rundata);
62         context.put( "data", rundata);
63         TurbineVelocity.getContext(rundata).put("jetspeed", new org.apache.jetspeed.util.template.JetspeedTool(rundata));
64
65         ConcreteElement result = null;
66         String JavaDoc controlName = rundata.getParameters().getString("previewedControlName");
67         String JavaDoc portletName = rundata.getParameters().getString("previewedPortletName");
68         if ( portletName == null )
69         {
70             JetspeedLink jsLink = null;
71
72             try
73             {
74                 jsLink = JetspeedLinkFactory.getInstance(rundata);
75                 rundata.setRedirectURI(
76                     jsLink.setUser(
77                         rundata.getUser().getUserName(), "default.psml")
78                     .addPathInfo("template", "Customize")
79                     .addPathInfo("media-type", "html")
80                     .toString()
81                     );
82                 JetspeedLinkFactory.putInstance(jsLink);
83                 jsLink = null;
84                 return new JetspeedClearElement("");
85             } catch (Exception JavaDoc e)
86             {
87                 logger.error("Exception", e);
88                 rundata.setScreenTemplate("Home");
89                 return new JetspeedClearElement("");
90             }
91             //return new JetspeedClearElement("You must specify portlet to preview using [previewedPortletName] parameter");
92 }
93         Portlet portlet = null;
94
95         try
96         {
97             portlet = PortletFactory.getPortlet(portletName, "PreviewPortlet");
98             PortletControl control = controlName == null ? PortalToolkit.getControl((String JavaDoc)null) :
99                                      PortalToolkit.getControl(controlName);
100             control = null;
101             if ( control != null )
102             {
103                 JetspeedRunData jdata = (JetspeedRunData)rundata;
104                 // Use the profile's skin
105 //portlet.getPortletConfig().setSkin(PortalToolkit.getSkin(jdata.getProfile().getDocument().getPortlets().getSkin()));
106 control.setPortlet(portlet);
107                 control.init();
108                 result = control.getContent(rundata);
109             }
110             else if ( portlet != null )
111             {
112                 result = portlet.getContent(rundata);
113             }
114
115             if ( result != null && !result.toString().equals("") )
116             {
117                 /*String html = result.toString();
118                 String currentURL = rundata.getRequest().getRequestURI();
119                 Log.debug("PreviewPortlet: currentURL = " + currentURL + " reader value = " + html);
120                 PreviewRewriter rewriter = new PreviewRewriter(currentURL, currentURL , currentURL, portletName);
121                 result = new JetspeedClearElement(rewriter.rewrite(new StringReader(html)));*/
122             }
123             else
124             {
125                 // The portlet already streamed its content - return a stub
126 result = new JetspeedClearElement("");
127             }
128
129         }
130         catch ( Exception JavaDoc e )
131         {
132             logger.error("Exception", e);
133             result = new JetspeedClearElement("This resource is temporarily unavailable");
134         }
135
136         rundata.setLayout("preview");
137         return result;
138     }
139
140 }
141
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