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Java > Open Source Codes > org > blojsom > plugin > calendar > CalendarFilterPlugin


1 /**
2  * Copyright (c) 2003-2006, David A. Czarnecki
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * Redistributions of source code must retain the above copyright notice, this list of conditions and the
9  * following disclaimer.
10  * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
11  * following disclaimer in the documentation and/or other materials provided with the distribution.
12  * Neither the name of "David A. Czarnecki" and "blojsom" nor the names of its contributors may be used to
13  * endorse or promote products derived from this software without specific prior written permission.
14  * Products derived from this software may not be called "blojsom", nor may "blojsom" appear in their name,
15  * without prior written permission of David A. Czarnecki.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
18  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
19  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
21  * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */

31 package org.blojsom.plugin.calendar;
32
33 import org.apache.commons.logging.Log;
34 import org.apache.commons.logging.LogFactory;
35 import org.blojsom.blog.Blog;
36 import org.blojsom.blog.Entry;
37 import org.blojsom.fetcher.FetcherException;
38 import org.blojsom.plugin.PluginException;
39 import org.blojsom.util.BlojsomConstants;
40
41 import javax.servlet.http.HttpServletRequest JavaDoc;
42 import javax.servlet.http.HttpServletResponse JavaDoc;
43 import java.util.Date JavaDoc;
44 import java.util.Map JavaDoc;
45
46 /**
47  * CalendarFilterPlugin filters entries based on the calendar navigation parameters
48  * in the URL
49  *
50  * @author David Czarnecki
51  * @author Mark Lussier
52  * @since blojsom 3.0
53  * @version $Id: CalendarFilterPlugin.java,v 1.5 2006/07/07 01:37:01 czarneckid Exp $
54  */

55 public class CalendarFilterPlugin extends AbstractCalendarPlugin {
56
57     private Log _logger = LogFactory.getLog(CalendarFilterPlugin.class);
58
59     /**
60      * Process the blog entries
61      *
62      * @param httpServletRequest Request
63      * @param httpServletResponse Response
64      * @param user {@link BlogUser} instance
65      * @param context Context
66      * @param entries Blog entries retrieved for the particular request
67      * @return Modified set of blog entries
68      * @throws PluginException If there is an error processing the blog entries
69      */

70     public Entry[] process(HttpServletRequest JavaDoc httpServletRequest, HttpServletResponse JavaDoc httpServletResponse, Blog blog, Map JavaDoc context, Entry[] entries) throws PluginException {
71         entries = super.process(httpServletRequest, httpServletResponse, blog, context, entries);
72
73         Date JavaDoc startDate = (Date JavaDoc) context.get(BLOJSOM_FILTER_START_DATE);
74         Date JavaDoc endDate = (Date JavaDoc) context.get(BLOJSOM_FILTER_END_DATE);
75         Date JavaDoc now = new Date JavaDoc();
76
77         boolean isPermalinkRequest = context.containsKey(BlojsomConstants.BLOJSOM_PERMALINK);
78
79         if (startDate != null && endDate != null && !isPermalinkRequest) {
80             if (startDate.before(now)) {
81                 if (endDate.after(now)) {
82                     endDate = now;
83                 }
84
85                 try {
86                     if (_logger.isDebugEnabled()) {
87                         _logger.debug("Filtering entries betweeen: " + startDate.toString() + " and " + endDate.toString());
88                     }
89
90                     entries = _fetcher.findEntriesBetweenDates(blog, startDate, endDate);
91                 } catch (FetcherException e) {
92                     if (_logger.isErrorEnabled()) {
93                         _logger.error(e);
94                     }
95                 }
96             }
97         }
98
99         return entries;
100     }
101 }
102
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