Source Code Cross Referenced for Page.java in  » Content-Management-System » TransferCM » com » methodhead » shim » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » TransferCM » com.methodhead.shim 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* 
002:         * Copyright (C) 2006 Methodhead Software LLC.  All rights reserved.
003:         * 
004:         * This file is part of TransferCM.
005:         * 
006:         * TransferCM is free software; you can redistribute it and/or modify it under the
007:         * terms of the GNU General Public License as published by the Free Software
008:         * Foundation; either version 2 of the License, or (at your option) any later
009:         * version.
010:         * 
011:         * TransferCM is distributed in the hope that it will be useful, but WITHOUT ANY
012:         * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
013:         * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
014:         * details.
015:         * 
016:         * You should have received a copy of the GNU General Public License along with
017:         * TransferCM; if not, write to the Free Software Foundation, Inc., 51 Franklin St,
018:         * Fifth Floor, Boston, MA  02110-1301  USA
019:         */
020:
021:        package com.methodhead.shim;
022:
023:        import com.methodhead.aikp.AutoIntKeyPersistable;
024:
025:        import org.apache.commons.beanutils.DynaClass;
026:        import org.apache.commons.beanutils.DynaProperty;
027:        import org.apache.commons.beanutils.BasicDynaClass;
028:        import java.util.Map;
029:        import java.util.HashMap;
030:        import java.util.List;
031:        import java.util.Iterator;
032:        import java.util.Collections;
033:        import com.methodhead.persistable.Persistable;
034:        import com.methodhead.persistable.PersistableException;
035:        import com.methodhead.persistable.Key;
036:        import com.methodhead.sitecontext.SiteContextCapable;
037:        import com.methodhead.sitecontext.SiteContext;
038:        import org.apache.commons.lang.StringUtils;
039:
040:        /**
041:         * A Page.  The following fields are defined:
042:         * <ul>
043:         *   <li><tt>int id = 0</tt></li>
044:         *   <li><tt>int sitecontext_id = 0</tt></li>
045:         *   <li><tt>String title = ""</tt></li>
046:         *   <li><tt>String alttitle = ""</tt></li>
047:         *   <li><tt>String aliasname = ""</tt></li>
048:         *   <li><tt>String template = ""</tt></li>
049:         *   <li><tt>boolean hidden = false</tt></li>
050:         *   <li><tt>String metadescription = ""</tt></li>
051:         *   <li><tt>String metakeywords = ""</tt></li>
052:         * </ul>
053:         */
054:        public class Page extends AutoIntKeyPersistable implements 
055:                SiteContextCapable, Comparable {
056:
057:            private static DynaClass dynaClass_ = null;
058:            private static DynaClass panelDynaClass_ = null;
059:
060:            static {
061:                DynaProperty[] dynaProperties = new DynaProperty[] {
062:                        new DynaProperty("id", Integer.class),
063:                        new DynaProperty("sitecontext_id", Integer.class),
064:                        new DynaProperty("title", String.class),
065:                        new DynaProperty("alttitle", String.class),
066:                        new DynaProperty("aliasname", String.class),
067:                        new DynaProperty("template", String.class),
068:                        new DynaProperty("hidden", Boolean.class),
069:                        new DynaProperty("metadescription", String.class),
070:                        new DynaProperty("metakeywords", String.class) };
071:
072:                dynaClass_ = new BasicDynaClass("shim_page", Page.class,
073:                        dynaProperties);
074:
075:                dynaProperties = new DynaProperty[] {
076:                        new DynaProperty("page_id", Integer.class),
077:                        new DynaProperty("name", String.class),
078:                        new DynaProperty("module", String.class) };
079:
080:                panelDynaClass_ = new BasicDynaClass("shim_panel",
081:                        Persistable.class, dynaProperties);
082:            }
083:
084:            // constructors /////////////////////////////////////////////////////////////
085:
086:            public Page() {
087:                super (dynaClass_);
088:                init();
089:            }
090:
091:            public Page(DynaClass dynaClass) {
092:                super (dynaClass);
093:                init();
094:            }
095:
096:            // constants ////////////////////////////////////////////////////////////////
097:
098:            // classes //////////////////////////////////////////////////////////////////
099:
100:            // methods //////////////////////////////////////////////////////////////////
101:
102:            protected void init() {
103:                setInt("id", 0);
104:                setInt("sitecontext_id", 0);
105:                setString("title", "");
106:                setString("alttitle", "");
107:                setString("aliasname", "");
108:                setString("template", "");
109:                setBoolean("hidden", false);
110:                setString("metadescription", "");
111:                setString("metakeywords", "");
112:            }
113:
114:            public String toString() {
115:                return getString("title");
116:            }
117:
118:            public int compareTo(Object o) {
119:
120:                if (o == null)
121:                    return 1;
122:
123:                if (!Page.class.isInstance(o))
124:                    return 1;
125:
126:                Page p = (Page) o;
127:
128:                return getString("title").toLowerCase().compareTo(
129:                        p.getString("title").toLowerCase());
130:            }
131:
132:            /**
133:             * Returns the current site context for this object, throwing an exception if
134:             * it hasn't been set.
135:             */
136:            public SiteContext getSiteContext() {
137:                if (siteContext_ == null)
138:                    throw new ShimException("Site context has not been set.");
139:
140:                return siteContext_;
141:            }
142:
143:            /**
144:             * Implements <tt>SiteContextCapable.setSiteContext()</tt>.
145:             */
146:            public void setSiteContext(SiteContext siteContext) {
147:
148:                siteContext_ = siteContext;
149:            }
150:
151:            /**
152:             * Returns an alias name for <tt>title</tt> by converting it to lower case
153:             * and removing any whitespace or special characters; if a page exists with
154:             * the alias, a number is appended and incremented until a unique alias is
155:             * calculated.
156:             */
157:            protected void setDefaultAliasName() {
158:
159:                String title = getString("title");
160:
161:                //
162:                // blank title?
163:                //
164:                if (StringUtils.isBlank(title))
165:                    throw new ShimException(
166:                            "Can't set default alias name for empty title.");
167:
168:                //
169:                // convert to lower case
170:                //
171:                String alias = title.toLowerCase();
172:
173:                //
174:                // strip out non-alphanumeric characters
175:                //
176:                StringBuffer buf = new StringBuffer();
177:
178:                for (int i = 0; i < alias.length(); i++) {
179:                    char c = alias.charAt(i);
180:
181:                    if (Character.isLetterOrDigit(c))
182:                        buf.append(c);
183:                }
184:
185:                alias = buf.toString();
186:
187:                //
188:                // make sure it hasn't already been used
189:                //
190:                Page p = new Page();
191:                p.setSiteContext(getSiteContext());
192:
193:                try {
194:                    p.loadForAlias(alias);
195:
196:                    //
197:                    // did we find ourself?
198:                    //
199:                    if (p.getInt("id") != getInt("id")) {
200:
201:                        //
202:                        // try to find an alternative
203:                        //
204:                        String tmp = alias;
205:                        for (int i = 2; true; i++) {
206:                            alias = tmp + i;
207:
208:                            try {
209:                                p.loadForAlias(alias);
210:                            } catch (PersistableException e) {
211:                                break;
212:                            }
213:                        }
214:                    }
215:                } catch (PersistableException e) {
216:                    //
217:                    // no such page
218:                    //
219:                }
220:
221:                setString("aliasname", alias);
222:            }
223:
224:            /**
225:             * Adds a panel to the page.
226:             */
227:            public void addPanel(Panel panel) {
228:
229:                if (panels_.containsKey(panel.getName()))
230:                    throw new ShimException("Page already has panel \""
231:                            + panel.getName() + "\"");
232:
233:                panels_.put(panel.getName(), panel);
234:            }
235:
236:            /**
237:             * Deletes any panels associated with this page from the database.
238:             */
239:            private void deletePanels() {
240:                Persistable.deleteAll(panelDynaClass_, "page_id="
241:                        + getInt("id"));
242:            }
243:
244:            /**
245:             * Saves any panels associated with this site context to the database.
246:             */
247:            private void savePanels() {
248:                Persistable p = new Persistable(panelDynaClass_);
249:                p.setInt("page_id", getInt("id"));
250:
251:                for (Iterator iter = panels_.values().iterator(); iter
252:                        .hasNext();) {
253:                    Panel panel = (Panel) iter.next();
254:                    p.set("name", panel.getName());
255:                    p.set("module", panel.getModuleClass());
256:                    p.saveNew();
257:                }
258:            }
259:
260:            /**
261:             * Loads any panels associated with this site context from the database.
262:             */
263:            private void loadPanels() {
264:                panels_.clear();
265:
266:                List l = Persistable.loadAll(panelDynaClass_, "page_id="
267:                        + getInt("id"), "name");
268:
269:                for (Iterator iter = l.iterator(); iter.hasNext();) {
270:                    Persistable p = (Persistable) iter.next();
271:                    Panel panel = new Panel();
272:                    panel.setName(p.getString("name"));
273:                    panel.setModuleClass(p.getString("module"));
274:                    panels_.put(panel.getName(), panel);
275:                }
276:            }
277:
278:            /**
279:             * Instantiates modules for each panel and calls their <tt>init()</tt>
280:             * method.
281:             */
282:            private void initPanels() {
283:                for (Iterator iter = panels_.values().iterator(); iter
284:                        .hasNext();) {
285:                    Panel panel = (Panel) iter.next();
286:
287:                    Module module = null;
288:                    try {
289:                        module = (Module) Class.forName(panel.getModuleClass())
290:                                .newInstance();
291:                    } catch (Exception e) {
292:                        throw new ShimException(
293:                                "Unexpected exception while instantiating module \""
294:                                        + panel.getModuleClass() + "\":"
295:                                        + e.toString());
296:                    }
297:
298:                    module.init(this , panel.getName());
299:
300:                    panel.setModule(module);
301:                }
302:            }
303:
304:            public void saveNew() {
305:
306:                setInt("sitecontext_id", getSiteContext().getInt("id"));
307:
308:                //
309:                // save
310:                //
311:                super .saveNew();
312:                savePanels();
313:            }
314:
315:            public void load(Key key) {
316:
317:                //
318:                // load needs only the id, but to enforce a call to setSiteContext(), make
319:                // sure the site context has been set
320:                //
321:                super .load(key.getWhereClause() + " AND sitecontext_id="
322:                        + getSiteContext().getInt("id"));
323:
324:                loadPanels();
325:            }
326:
327:            public void save() {
328:                super .save();
329:                deletePanels();
330:                savePanels();
331:            }
332:
333:            /**
334:             * Deletes any modules associated with this page using {@link Module#destroy
335:             * Module.destroy()} and deletes the page; be sure to call {@link #loadFull
336:             * loadFull()} before calling this method.
337:             */
338:            public void delete() {
339:
340:                for (Iterator iter = getPanels().values().iterator(); iter
341:                        .hasNext();) {
342:                    Panel panel = (Panel) iter.next();
343:                    panel.getModule().destroy();
344:                }
345:
346:                deletePanels();
347:                super .delete();
348:            }
349:
350:            /**
351:             * Loads the page and any modules referenced by its panels.  {@link
352:             * Module#init init()} is called for each module during this operation.
353:             */
354:            public void loadFull(Key key) {
355:
356:                load(key);
357:                initPanels();
358:            }
359:
360:            /**
361:             * Loads the page for <tt>alias</tt> and any modules referenced by its
362:             * panels.  {@link Module#init init()} is called for each module during this
363:             * operation.
364:             */
365:            public void loadFullForAlias(String alias) {
366:
367:                loadForAlias(alias);
368:                initPanels();
369:            }
370:
371:            /**
372:             * Loads all pages in the system; a shallow load is performed.
373:             */
374:            public List loadAll() {
375:                List l = loadAll(dynaClass_, "sitecontext_id="
376:                        + getSiteContext().getInt("id"), "title");
377:
378:                //
379:                // set the site context for each page
380:                //
381:                for (Iterator iter = l.iterator(); iter.hasNext();) {
382:                    Page p = (Page) iter.next();
383:                    p.setSiteContext(getSiteContext());
384:                }
385:
386:                //
387:                // sort the pages
388:                //
389:                Collections.sort(l);
390:
391:                return l;
392:            }
393:
394:            /**
395:             * Loads the page for <tt>alias</tt>, returning <tt>true</tt> if the page was
396:             * found. 
397:             */
398:            public void loadForAlias(String alias) {
399:
400:                super .load("sitecontext_id=" + getSiteContext().getInt("id")
401:                        + " AND aliasname=" + getSqlLiteral(alias));
402:
403:                loadPanels();
404:            }
405:
406:            /**
407:             * Copies the page and all of its modules.
408:             */
409:            public Page copy() {
410:
411:                Page copy = new Page();
412:
413:                copy.setSiteContext(getSiteContext());
414:                copy.setString("title", getString("title"));
415:                copy.setString("alttitle", getString("alttitle"));
416:                copy.setDefaultAliasName();
417:                copy.setString("template", getString("template"));
418:                copy.setBoolean("hidden", getBoolean("hidden"));
419:                copy.setString("metadescription", getString("metadescription"));
420:                copy.setString("metakeywords", getString("metakeywords"));
421:
422:                for (Iterator iter = getPanels().values().iterator(); iter
423:                        .hasNext();) {
424:                    Panel panel = (Panel) iter.next();
425:                    copy.addPanel((Panel) panel.clone());
426:                }
427:
428:                copy.saveNew();
429:
430:                for (Iterator iter = getPanels().values().iterator(); iter
431:                        .hasNext();) {
432:                    Panel panel = (Panel) iter.next();
433:                    panel.getModule().copyTo(copy);
434:                }
435:
436:                return copy;
437:            }
438:
439:            // properties ///////////////////////////////////////////////////////////////
440:
441:            /**
442:             * Returns a map of {@link Panel}s.
443:             */
444:            public Map getPanels() {
445:                return panels_;
446:            }
447:
448:            // attributes ///////////////////////////////////////////////////////////////
449:
450:            protected Map panels_ = new HashMap();
451:
452:            protected SiteContext siteContext_ = null;
453:        }
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