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Java > Open Source Codes > com > blandware > atleap > webapp > action > news > ShowNewsItemAction


1 /*
2  * Copyright 2004 Blandware (http://www.blandware.com)
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16 package com.blandware.atleap.webapp.action.news;
17
18 import com.blandware.atleap.common.NewsModuleConstants;
19 import com.blandware.atleap.model.core.Role;
20 import com.blandware.atleap.model.news.NewsItem;
21 import com.blandware.atleap.service.news.NewsManager;
22 import com.blandware.atleap.webapp.action.core.BaseAction;
23 import com.blandware.atleap.webapp.form.NewsItemForm;
24 import com.blandware.atleap.webapp.util.news.NewsModuleWebConstants;
25 import org.apache.commons.validator.GenericValidator;
26 import org.apache.struts.action.ActionForm;
27 import org.apache.struts.action.ActionForward;
28 import org.apache.struts.action.ActionMapping;
29
30 import javax.servlet.http.HttpServletRequest JavaDoc;
31 import javax.servlet.http.HttpServletResponse JavaDoc;
32 import java.util.Iterator JavaDoc;
33 import java.util.List JavaDoc;
34
35 /**
36  * <p>Show news item to customer
37  * </p>
38  * <p><a HREF="ShowNewsItemAction.java.htm"><i>View Source</i></a></p>
39  * <p/>
40  *
41  * @author Sergey Zubtcovskii <a HREF="mailto:sergey.zubtcovskii@blandware.com">&lt;sergey.zubtcovskii@blandware.com&gt;</a>
42  * @version $Revision: 1.12 $ $Date: 2006/03/16 11:09:42 $
43  * @struts.action path="/news/showItem"
44  * name="newsItemForm"
45  * scope="request"
46  * validate="false"
47  * @struts.action-forward name="viewNewsItem"
48  * path=".news.showItem"
49  * @struts.action-forward name="listNewsItems"
50  * path="/news/listItems.do"
51  * redirect="true"
52  */

53 public final class ShowNewsItemAction extends BaseAction {
54     /**
55      * @param mapping The ActionMapping used to select this instance
56      * @param form The optional ActionForm bean for this request (if any)
57      * @param request The HTTP request we are proceeding
58      * @param response The HTTP response we are creating
59      * @return an ActionForward instance describing where and how
60      * control should be forwarded, or null if response
61      * has already been completed
62      */

63     public ActionForward execute(ActionMapping mapping, ActionForm form,
64                                  HttpServletRequest JavaDoc request, HttpServletResponse JavaDoc response) throws Exception JavaDoc {
65         NewsItemForm newsItemForm = (NewsItemForm) form;
66         Long JavaDoc newsItemId = null;
67         if ( !GenericValidator.isBlankOrNull(newsItemForm.getId()) ) {
68             newsItemId = Long.valueOf(newsItemForm.getId());
69         } else if ( request.getSession().getAttribute(NewsModuleWebConstants.NEWS_ITEM_ID_KEY) != null ) {
70             newsItemId = (Long JavaDoc) request.getSession().getAttribute(NewsModuleWebConstants.NEWS_ITEM_ID_KEY);
71         } else {
72             if ( log.isWarnEnabled() ) {
73                 log.warn("Missing content page ID. Returning to list...");
74             }
75             return mapping.findForward("listNewsItems");
76         }
77
78         NewsManager newsManager = (NewsManager) getBean(NewsModuleConstants.NEWS_MANAGER_BEAN);
79         NewsItem newsItem = newsManager.retrieveNewsItem(newsItemId);
80         if ( newsItem == null ) {
81             response.sendError(HttpServletResponse.SC_NOT_FOUND);
82             return null;
83         }
84
85         if ( !newsItem.getActive().booleanValue() ) {
86             response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
87             return null;
88         }
89
90         // check user role
91
List JavaDoc itemRoles = newsItem.getRoles();
92         if ( itemRoles != null && !itemRoles.isEmpty() ) {
93             boolean isUserInRole = false;
94             for ( Iterator JavaDoc i = itemRoles.iterator(); i.hasNext(); ) {
95                 Role role = (Role) i.next();
96                 isUserInRole = isUserInRole || request.isUserInRole(role.getName());
97             }
98
99             if ( !isUserInRole ) {
100                 // access denied
101
response.sendError(HttpServletResponse.SC_FORBIDDEN);
102                 return null;
103             }
104         }
105
106         request.setAttribute("newsItem", newsItem);
107         return mapping.findForward("viewNewsItem");
108     }
109 }
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