001: /**
002: * Copyright (c) 2003-2007, David A. Czarnecki
003: * All rights reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions are met:
007: *
008: * Redistributions of source code must retain the above copyright notice, this list of conditions and the
009: * following disclaimer.
010: * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
011: * following disclaimer in the documentation and/or other materials provided with the distribution.
012: * Neither the name of "David A. Czarnecki" and "blojsom" nor the names of its contributors may be used to
013: * endorse or promote products derived from this software without specific prior written permission.
014: * Products derived from this software may not be called "blojsom", nor may "blojsom" appear in their name,
015: * without prior written permission of David A. Czarnecki.
016: *
017: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
018: * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
019: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
020: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
021: * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
022: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
024: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
025: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
026: * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
027: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
028: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
029: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
030: */package org.blojsom.plugin.chrono;
031:
032: import org.blojsom.blog.Blog;
033: import org.blojsom.blog.Entry;
034: import org.blojsom.plugin.Plugin;
035: import org.blojsom.plugin.PluginException;
036:
037: import javax.servlet.http.HttpServletRequest;
038: import javax.servlet.http.HttpServletResponse;
039: import java.util.ArrayList;
040: import java.util.Collections;
041: import java.util.Map;
042:
043: /**
044: * ChronoPlugin
045: * <p/>
046: * This plugin sorts the entries in ascending order. The oldest entry will be first and the
047: * most recent entry will be last.
048: *
049: * @author David Czarnecki
050: * @version $Id: ChronoPlugin.java,v 1.3 2007/01/17 02:35:08 czarneckid Exp $
051: * @since blojsom 3.0
052: */
053: public class ChronoPlugin implements Plugin {
054:
055: /**
056: * Initialize this plugin. This method only called when the plugin is instantiated.
057: *
058: * @throws PluginException If there is an error initializing the plugin
059: */
060: public void init() throws PluginException {
061: }
062:
063: /**
064: * Process the blog entries
065: *
066: * @param httpServletRequest Request
067: * @param httpServletResponse Response
068: * @param blog {@link Blog} instance
069: * @param context Context
070: * @param entries Blog entries retrieved for the particular request
071: * @return Modified set of blog entries
072: * @throws PluginException If there is an error processing the blog entries
073: */
074: public Entry[] process(HttpServletRequest httpServletRequest,
075: HttpServletResponse httpServletResponse, Blog blog,
076: Map context, Entry[] entries) throws PluginException {
077: if (entries.length == 0) {
078: return entries;
079: } else {
080: ArrayList entriesList = new ArrayList();
081: for (int i = 0; i < entries.length; i++) {
082: Entry entry = entries[i];
083: entriesList.add(entry);
084: }
085:
086: Collections.reverse(entriesList);
087:
088: return (Entry[]) entriesList.toArray(new Entry[entriesList
089: .size()]);
090: }
091: }
092:
093: /**
094: * Perform any cleanup for the plugin. Called after {@link #process}.
095: *
096: * @throws PluginException If there is an error performing cleanup for this plugin
097: */
098: public void cleanup() throws PluginException {
099: }
100:
101: /**
102: * Called when BlojsomServlet is taken out of service
103: *
104: * @throws PluginException If there is an error in finalizing this plugin
105: */
106: public void destroy() throws PluginException {
107: }
108: }
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