2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.util.ArrayList;
33 import java.util.Collections;
34 import java.util.HashMap;
35 import java.util.Iterator;
36 import java.util.List;
37 import java.util.Locale;
40 import javax.servlet.http.HttpServletRequest;
41 import javax.servlet.http.HttpServletResponse;
42 import javax.servlet.http.HttpSession;
44 import mir.config.MirPropertiesConfiguration;
45 import mir.entity.adapter.EntityAdapterEngine;
46 import mir.entity.adapter.EntityAdapterModel;
47 import mir.log.LoggerWrapper;
48 import mir.module.AbstractModule;
49 import mir.module.ModuleExc;
50 import mir.storage.Database;
51 import mir.util.HTTPRequestParser;
52 import mir.util.URLBuilder;
53 import mircoders.global.MirGlobal;
54 import mircoders.localizer.MirLocalizerExc;
55 import mircoders.servlet.ServletHelper;
61 public abstract class ServletModule {
62 public String defaultAction;
63 protected LoggerWrapper logger;
64 protected static MirPropertiesConfiguration configuration = MirPropertiesConfiguration.instance();
65 private static Locale fallbackLocale = new Locale(configuration.getString("Mir.Admin.FallbackLanguage", "en"), "");
67 protected AbstractModule mainModule;
68 protected String definition;
69 protected EntityAdapterModel model;
71 protected String listGenerator;
72 protected String editGenerator;
73 protected String deleteConfirmationGenerator;
74 protected int nrEntitiesPerListPage;
76 /** the list of parameters that need to be propagated in the list */
77 protected List propagatedParameters = new ArrayList();
79 public ServletModule(){
80 propagatedParameters.add("searchfield");
81 propagatedParameters.add("searchtext");
82 propagatedParameters.add("searchispublished");
83 propagatedParameters.add("searchstatus");
84 propagatedParameters.add("searchorder");
88 model = MirGlobal.localizer().dataModel().adapterModel();
90 catch (MirLocalizerExc e) {
91 logger.error("Can't create model: " + e.toString());
92 throw new ServletModuleFailure("Can't retrieve model", e);
95 listGenerator = configuration.getString("ServletModule."+getOperationModuleName()+".ListTemplate");
96 editGenerator = configuration.getString("ServletModule."+getOperationModuleName()+".EditTemplate");
97 deleteConfirmationGenerator = configuration.getString("ServletModule."+getOperationModuleName()+".DeleteConfirmationTemplate");
98 nrEntitiesPerListPage =
99 configuration.getInt("ServletModule."+getOperationModuleName()+".ListSize",
100 configuration.getInt("ServletModule.Default.ListSize", 20));
105 public void logAdminUsage(HttpServletRequest aRequest, String anObject, String aDescription) {
106 MirGlobal.logAdminUsage(ServletHelper.getUser(aRequest), getOperationModuleName() + ":" + anObject, aDescription);
110 * Singleton instance retrievel method. MUST be overridden in subclasses.
112 * @return ServletModule the single instance of the servletmodule class
114 public static ServletModule getInstance() {
119 * Return the module name
121 protected String getOperationModuleName() {
122 return getClass().getName().substring((new String("mircoders.servlet.ServletModule")).length());
125 public static Locale[] getLocales(HttpServletRequest aRequest) {
126 return new Locale[] { getLocale(aRequest), fallbackLocale };
130 * Return the locale either from the session or the accept-language header ot the request
131 * this supersedes getLanguage for the new i18n
133 public static Locale getLocale(HttpServletRequest aRequest) {
134 Locale locale = null;
135 HttpSession session = aRequest.getSession(false);
136 if (session != null) {
137 // session can be null in case of logout
138 locale = (Locale) session.getAttribute("locale");
140 // if there is nothing in the session get it fron the accept-language
141 if (locale == null) {
142 locale = aRequest.getLocale();
148 * get the locale either from the session or the accept-language header ot the request
149 * this supersedes getLanguage for the new i18n
151 public Locale getFallbackLocale(HttpServletRequest aRequest) {
152 return fallbackLocale;
156 * Function to specify the default ordering for lists. May be overridden.
161 public String getDefaultListOrdering() {
163 if (mainModule!=null && mainModule.getStorageObject()!=null) {
164 if (mainModule.getStorageObject().hasField("webdb_create"))
165 return "webdb_create desc";
172 * Generic list servlet method
175 public void list(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc {
176 HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
178 String where = requestParser.getParameter("where");
179 String order = requestParser.getParameterWithDefault("order", getDefaultListOrdering());
180 int offset = requestParser.getIntegerWithDefault("offset", 0);
182 returnList(aRequest, aResponse, where, order, offset);
186 public void returnList(HttpServletRequest aRequest, HttpServletResponse aResponse,
187 String aWhereClause, String anOrderByClause, int anOffset) throws ServletModuleExc {
188 returnList(aRequest, aResponse, aWhereClause, anOrderByClause, anOffset, Collections.EMPTY_MAP);
191 public void returnList(HttpServletRequest aRequest, HttpServletResponse aResponse,
192 String aWhereClause, String anOrderByClause, int anOffset, Map anOverridingRequestParameters) throws ServletModuleExc {
193 HTTPRequestParser requestParser = new HTTPRequestParser(aRequest, anOverridingRequestParameters);
194 URLBuilder urlBuilder = new URLBuilder();
197 Map responseData = ServletHelper.makeGenerationData(aRequest, aResponse, getLocales(aRequest));
200 EntityAdapterEngine.retrieveAdapterList(model, definition, aWhereClause, anOrderByClause, nrEntitiesPerListPage, anOffset);
202 responseData.put("nexturl", null);
203 responseData.put("prevurl", null);
204 responseData.put("module", getOperationModuleName());
206 urlBuilder.setValue("module", getOperationModuleName());
207 urlBuilder.setValue("do", "list");
208 urlBuilder.setValue("where", aWhereClause);
209 urlBuilder.setValue("order", anOrderByClause);
212 urlBuilder.setValue("offset", anOffset);
213 responseData.put("offset" , new Integer(anOffset).toString());
214 responseData.put("thisurl" , urlBuilder.getQuery());
216 propagateFields(requestParser, urlBuilder, responseData);
218 if (list.size()>=nrEntitiesPerListPage) {
219 urlBuilder.setValue("offset", anOffset + nrEntitiesPerListPage);
220 responseData.put("nexturl" , urlBuilder.getQuery());
224 urlBuilder.setValue("offset", Math.max(anOffset - nrEntitiesPerListPage, 0));
225 responseData.put("prevurl" , urlBuilder.getQuery());
228 responseData.put("entities", list);
229 responseData.put("from" , Integer.toString(anOffset+1));
230 responseData.put("count", "?");
231 responseData.put("to", Integer.toString(anOffset+list.size()-1));
233 ServletHelper.generateResponse(aResponse.getWriter(), responseData, listGenerator);
235 catch (Throwable e) {
236 throw new ServletModuleFailure(e);
240 public void editObject(HttpServletRequest aRequest, HttpServletResponse aResponse, String anId) throws ServletModuleExc {
242 editObject(aRequest, aResponse, model.makeEntityAdapter(definition, mainModule.getById(anId)), false, anId);
244 catch (Throwable t) {
245 throw new ServletModuleFailure(t);
249 public void editObject(HttpServletRequest aRequest, HttpServletResponse aResponse, Object anObject, boolean anIsNew, String anId) throws ServletModuleExc {
250 HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
251 URLBuilder urlBuilder = new URLBuilder();
254 Map responseData = ServletHelper.makeGenerationData(aRequest, aResponse, getLocales(aRequest));
256 responseData.put("module", getOperationModuleName());
257 responseData.put("entity", anObject);
258 responseData.put("new", new Boolean(anIsNew));
261 urlBuilder.setValue("module", getOperationModuleName());
262 urlBuilder.setValue("returnurl", requestParser.getParameter("returnurl"));
264 urlBuilder.setValue("do", "add");
266 urlBuilder.setValue("id", anId);
267 urlBuilder.setValue("do", "edit");
269 responseData.put("returnurl", requestParser.getParameter("returnurl"));
270 responseData.put("thisurl", urlBuilder.getQuery());
272 ServletHelper.generateResponse(aResponse.getWriter(), responseData, editGenerator);
274 catch (Throwable e) {
275 throw new ServletModuleFailure(e);
280 * Generic add servlet method
282 public void add(HttpServletRequest aRequest, HttpServletResponse aResponse)
283 throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure {
285 Map object = new HashMap();
287 Iterator i = mainModule.getStorageObject().getFieldNames().iterator();
290 object.put(i.next(), "");
292 initializeNewObject(object, aRequest, aResponse);
294 editObject(aRequest, aResponse, object, true, null);
297 protected void initializeNewObject(Map aNewObject, HttpServletRequest aRequest, HttpServletResponse aResponse) {
301 * Generic edit servlet method
303 public void edit(HttpServletRequest aRequest, HttpServletResponse aResponse) throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure {
304 edit(aRequest, aResponse, aRequest.getParameter("id"));
309 public void edit(HttpServletRequest aRequest, HttpServletResponse aResponse, String anIdentifier)
310 throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure {
312 editObject(aRequest, aResponse, model.makeEntityAdapter(definition, mainModule.getById(anIdentifier)), false, anIdentifier);
314 catch (Throwable e) {
315 throw new ServletModuleFailure(e);
320 * Generic update servlet method
322 public void update(HttpServletRequest aRequest, HttpServletResponse aResponse)
323 throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure {
325 HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
327 String id = aRequest.getParameter("id");
328 Map withValues = getIntersectingValues(aRequest, mainModule.getStorageObject());
329 mainModule.set(withValues);
331 logAdminUsage(aRequest, id, "object modified");
333 String returnUrl = requestParser.getParameter("returnurl");
335 if (returnUrl!=null) {
336 ServletHelper.redirect(aResponse, returnUrl);
339 edit(aRequest, aResponse, id);
342 catch (Throwable e) {
343 throw new ServletModuleFailure(e);
348 * Generic insert servlet method
350 public void insert(HttpServletRequest aRequest, HttpServletResponse aResponse)
351 throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure {
353 HTTPRequestParser requestParser = new HTTPRequestParser(aRequest);
355 Map object = getIntersectingValues(aRequest, mainModule.getStorageObject());
357 String id = processInstertedObject(object, aRequest, aResponse);
359 logAdminUsage(aRequest, id, "object inserted");
361 String returnUrl = requestParser.getParameter("returnurl");
363 if (returnUrl!=null) {
364 ServletHelper.redirect(aResponse, returnUrl);
367 edit(aRequest, aResponse, id);
370 catch (Throwable e) {
371 throw new ServletModuleFailure(e);
378 public String processInstertedObject(Map anObject, HttpServletRequest aRequest, HttpServletResponse aResponse) {
380 return mainModule.add(anObject);
382 catch (ModuleExc t) {
383 throw new ServletModuleFailure(t);
388 * Generic delete confirmation servlet method
390 public void confirmdelete(HttpServletRequest aRequest, HttpServletResponse aResponse) {
392 String idParam = aRequest.getParameter("id");
393 String confirmParam = aRequest.getParameter("confirm");
395 if (confirmParam != null && !confirmParam.equals("")) {
396 mainModule.deleteById(idParam);
397 logAdminUsage(aRequest, idParam, "object deleted");
398 ServletHelper.redirect(aResponse, aRequest.getParameter("okurl"));
401 ServletHelper.redirect(aResponse, aRequest.getParameter("cancelurl"));
403 catch (Throwable t) {
404 throw new ServletModuleFailure(t);
409 * Generic delete servlet method
411 public void delete(HttpServletRequest aRequest, HttpServletResponse aResponse)
412 throws ServletModuleExc, ServletModuleUserExc, ServletModuleFailure {
414 String idParam = aRequest.getParameter("id");
417 throw new ServletModuleExc("Invalid call to delete: no id supplied");
419 Map responseData = ServletHelper.makeGenerationData(aRequest, aResponse, getLocales(aRequest));
421 responseData.put("module", getOperationModuleName());
422 responseData.put("id", idParam);
423 responseData.put("cancelurl", aRequest.getParameter("cancelurl"));
424 responseData.put("okurl", aRequest.getParameter("okurl"));
426 ServletHelper.generateResponse(aResponse.getWriter(), responseData, deleteConfirmationGenerator);
428 catch (Throwable e) {
429 throw new ServletModuleFailure(e);
435 public String defaultAction() {
436 return defaultAction;
440 * Gets the fields from a httprequest and matches them with the metadata from
441 * the database object. Returns the keys that match, with their values.
443 * @return Map with the values
445 public Map getIntersectingValues(HttpServletRequest aRequest, Database theStorage)
446 throws ServletModuleExc, ServletModuleFailure {
448 HTTPRequestParser parser;
451 parser = new HTTPRequestParser(aRequest);
453 theFieldList = theStorage.getFieldNames();
455 Map withValues = new HashMap();
456 String aField, aValue;
458 for (int i = 0; i < theFieldList.size(); i++) {
459 aField = (String) theFieldList.get(i);
461 aValue = parser.getParameter(aField);
463 withValues.put(aField, aValue);
468 private void propagateFields(HTTPRequestParser aRequest, URLBuilder aUrlBuilder, Map aResponseData) {
469 Iterator i = propagatedParameters.iterator();
470 while (i.hasNext()) {
471 String parameter = (String) i.next();
472 String value = aRequest.getParameter(parameter);
473 aUrlBuilder.setValue(parameter, value);
474 aResponseData.put(parameter, value);