Source Code Cross Referenced for MarkupSelectionPlugin.java in  » Blogger-System » blojsom-3.1 » org » blojsom » plugin » markup » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Blogger System » blojsom 3.1 » org.blojsom.plugin.markup 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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.markup;
031:
032:        import org.apache.commons.logging.Log;
033:        import org.apache.commons.logging.LogFactory;
034:        import org.blojsom.blog.Entry;
035:        import org.blojsom.blog.Blog;
036:        import org.blojsom.event.EventBroadcaster;
037:        import org.blojsom.event.Listener;
038:        import org.blojsom.event.Event;
039:        import org.blojsom.plugin.Plugin;
040:        import org.blojsom.plugin.PluginException;
041:        import org.blojsom.plugin.admin.event.ProcessEntryEvent;
042:        import org.blojsom.util.BlojsomUtils;
043:
044:        import javax.servlet.ServletConfig;
045:        import javax.servlet.http.HttpServletRequest;
046:        import javax.servlet.http.HttpServletResponse;
047:        import java.util.Collections;
048:        import java.util.Iterator;
049:        import java.util.Map;
050:        import java.util.TreeMap;
051:
052:        /**
053:         * Markup selection plugin allows an individual to select a markup filter to apply
054:         * to their blog entry.
055:         *
056:         * @author David Czarnecki
057:         * @version $Id: MarkupSelectionPlugin.java,v 1.2 2007/01/17 02:35:11 czarneckid Exp $
058:         * @since blojsom 3.0
059:         */
060:        public class MarkupSelectionPlugin implements  Plugin, Listener {
061:
062:            private Log _logger = LogFactory
063:                    .getLog(MarkupSelectionPlugin.class);
064:
065:            private static final String PLUGIN_MARKUP_SELECTION_IP = "plugin-markup-selection";
066:            private static final String BLOJSOM_PLUGIN_MARKUP_SELECTIONS = "BLOJSOM_PLUGIN_MARKUP_SELECTIONS";
067:            private static final String MARKUP_SELECTION_TEMPLATE = "org/blojsom/plugin/markup/templates/admin-markup-selection-attachment.vm";
068:            private static final String MARKUP_SELECTIONS = "markup-selections";
069:
070:            private EventBroadcaster _eventBroadcaster;
071:            private ServletConfig _servletConfig;
072:
073:            private Map _markupSelections;
074:
075:            /**
076:             * Create a new instance of the markup selection plugin
077:             */
078:            public MarkupSelectionPlugin() {
079:            }
080:
081:            /**
082:             * Set the {@link EventBroadcaster} event broadcaster
083:             *
084:             * @param eventBroadcaster {@link EventBroadcaster}
085:             */
086:            public void setEventBroadcaster(EventBroadcaster eventBroadcaster) {
087:                _eventBroadcaster = eventBroadcaster;
088:            }
089:
090:            /**
091:             * Set the {@link ServletConfig} for the fetcher to grab initialization parameters
092:             *
093:             * @param servletConfig {@link ServletConfig}
094:             */
095:            public void setServletConfig(ServletConfig servletConfig) {
096:                _servletConfig = servletConfig;
097:            }
098:
099:            /**
100:             * Initialize this plugin. This method only called when the plugin is instantiated.
101:             *
102:             * @throws org.blojsom.plugin.PluginException
103:             *          If there is an error initializing the plugin
104:             */
105:            public void init() throws PluginException {
106:                String markupSelection = _servletConfig
107:                        .getInitParameter(PLUGIN_MARKUP_SELECTION_IP);
108:                _markupSelections = new TreeMap();
109:                if (!BlojsomUtils.checkNullOrBlank(markupSelection)) {
110:                    String[] markupTypes = BlojsomUtils
111:                            .parseCommaList(markupSelection);
112:                    for (int i = 0; i < markupTypes.length; i++) {
113:                        String markupType = markupTypes[i];
114:                        String[] markupNameAndKey = BlojsomUtils
115:                                .parseDelimitedList(markupType, ":");
116:                        if (markupNameAndKey != null
117:                                && markupNameAndKey.length == 2) {
118:                            _markupSelections.put(markupNameAndKey[0],
119:                                    markupNameAndKey[1]);
120:                            if (_logger.isDebugEnabled()) {
121:                                _logger.debug("Added markup type and key: "
122:                                        + markupNameAndKey[0] + ":"
123:                                        + markupNameAndKey[1]);
124:                            }
125:                        }
126:                    }
127:                }
128:
129:                _eventBroadcaster.addListener(this );
130:            }
131:
132:            /**
133:             * Process the blog entries
134:             *
135:             * @param httpServletRequest  Request
136:             * @param httpServletResponse Response
137:             * @param blog                {@link org.blojsom.blog.Blog} instance
138:             * @param context             Context
139:             * @param entries             Blog entries retrieved for the particular request
140:             * @return Modified set of blog entries
141:             * @throws PluginException If there is an error processing the blog entries
142:             */
143:            public Entry[] process(HttpServletRequest httpServletRequest,
144:                    HttpServletResponse httpServletResponse, Blog blog,
145:                    Map context, Entry[] entries) throws PluginException {
146:                return entries;
147:            }
148:
149:            /**
150:             * Perform any cleanup for the plugin. Called after {@link #process}.
151:             *
152:             * @throws org.blojsom.plugin.PluginException
153:             *          If there is an error performing cleanup for this plugin
154:             */
155:            public void cleanup() throws PluginException {
156:            }
157:
158:            /**
159:             * Called when BlojsomServlet is taken out of service
160:             *
161:             * @throws org.blojsom.plugin.PluginException
162:             *          If there is an error in finalizing this plugin
163:             */
164:            public void destroy() throws PluginException {
165:            }
166:
167:            /**
168:             * Handle an event broadcast from another component
169:             *
170:             * @param event {@link org.blojsom.event.Event} to be handled
171:             */
172:            public void handleEvent(Event event) {
173:            }
174:
175:            /**
176:             * Process an event from another component
177:             *
178:             * @param event {@link org.blojsom.event.Event} to be handled
179:             */
180:            public void processEvent(Event event) {
181:                if (event instanceof  ProcessEntryEvent) {
182:                    _logger.debug("Handling process blog entry event");
183:
184:                    if (!_markupSelections.isEmpty()) {
185:                        ProcessEntryEvent processEntryEvent = (ProcessEntryEvent) event;
186:                        Map templateAdditions = (Map) processEntryEvent
187:                                .getContext().get("BLOJSOM_TEMPLATE_ADDITIONS");
188:                        if (templateAdditions == null) {
189:                            templateAdditions = new TreeMap();
190:                        }
191:
192:                        templateAdditions.put(getClass().getName(), "#parse('"
193:                                + MARKUP_SELECTION_TEMPLATE + "')");
194:                        processEntryEvent.getContext()
195:                                .put("BLOJSOM_TEMPLATE_ADDITIONS",
196:                                        templateAdditions);
197:
198:                        processEntryEvent.getContext().put(
199:                                BLOJSOM_PLUGIN_MARKUP_SELECTIONS,
200:                                Collections.unmodifiableMap(_markupSelections));
201:
202:                        String[] markupSelections = processEntryEvent
203:                                .getHttpServletRequest().getParameterValues(
204:                                        MARKUP_SELECTIONS);
205:                        Entry entry = processEntryEvent.getEntry();
206:
207:                        if (markupSelections != null
208:                                && markupSelections.length > 0) {
209:                            // Remove the markup selections if the user selections the blank option
210:                            if (markupSelections.length == 1
211:                                    && "".equals(markupSelections[0])) {
212:                                Iterator markupSelectionsIterator = _markupSelections
213:                                        .values().iterator();
214:                                while (markupSelectionsIterator.hasNext()) {
215:                                    entry.getMetaData().remove(
216:                                            markupSelectionsIterator.next()
217:                                                    .toString());
218:                                }
219:                            } else {
220:                                // Otherwise, set the new markup selections
221:                                for (int i = 0; i < markupSelections.length; i++) {
222:                                    String markupSelection = markupSelections[i];
223:                                    entry.getMetaData().put(markupSelection,
224:                                            Boolean.TRUE.toString());
225:                                }
226:                            }
227:                        }
228:                    } else {
229:                        if (_logger.isDebugEnabled()) {
230:                            _logger.debug("No markup selections available");
231:                        }
232:                    }
233:                }
234:            }
235:        }
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