2 * DemosceneMusic - TemplateServlet.java - Copyright © 2012 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.demoscenemusic.core;
20 import java.io.ByteArrayInputStream;
21 import java.io.ByteArrayOutputStream;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.InputStreamReader;
25 import java.io.Reader;
26 import java.io.UnsupportedEncodingException;
27 import java.lang.reflect.InvocationTargetException;
28 import java.net.URISyntaxException;
29 import java.util.Comparator;
30 import java.util.Enumeration;
31 import java.util.HashMap;
34 import javax.servlet.ServletConfig;
35 import javax.servlet.ServletException;
36 import javax.servlet.http.HttpServlet;
37 import javax.servlet.http.HttpServletRequest;
38 import javax.servlet.http.HttpServletResponse;
40 import net.pterodactylus.demoscenemusic.data.Artist;
41 import net.pterodactylus.demoscenemusic.data.Properties;
42 import net.pterodactylus.demoscenemusic.data.Style;
43 import net.pterodactylus.demoscenemusic.data.Track;
44 import net.pterodactylus.demoscenemusic.data.TrackDerivative;
45 import net.pterodactylus.demoscenemusic.data.User;
46 import net.pterodactylus.demoscenemusic.page.ServletRequest;
47 import net.pterodactylus.demoscenemusic.template.PropertiesAccessor;
48 import net.pterodactylus.demoscenemusic.template.TrackDerivativeAccessor;
49 import net.pterodactylus.demoscenemusic.template.UserAccessor;
50 import net.pterodactylus.util.io.Closer;
51 import net.pterodactylus.util.io.StreamCopier;
52 import net.pterodactylus.util.template.ClassPathTemplateProvider;
53 import net.pterodactylus.util.template.CollectionSortFilter;
54 import net.pterodactylus.util.template.HtmlFilter;
55 import net.pterodactylus.util.template.MatchFilter;
56 import net.pterodactylus.util.template.ReflectionAccessor;
57 import net.pterodactylus.util.template.Template;
58 import net.pterodactylus.util.template.TemplateContextFactory;
59 import net.pterodactylus.util.template.TemplateParser;
60 import net.pterodactylus.util.web.Header;
61 import net.pterodactylus.util.web.Page;
62 import net.pterodactylus.util.web.Response;
67 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
69 public class TemplateServlet extends HttpServlet {
73 private final TemplateContextFactory templateContextFactory = new TemplateContextFactory();
75 private final Map<String, Page<ServletRequest>> pages = new HashMap<String, Page<ServletRequest>>();
85 public void init(ServletConfig config) throws ServletException {
87 core = (Core) config.getServletContext().getAttribute("core");
89 templateContextFactory.addAccessor(Object.class, new ReflectionAccessor());
90 templateContextFactory.addAccessor(User.class, new UserAccessor());
91 templateContextFactory.addAccessor(Properties.class, new PropertiesAccessor());
92 templateContextFactory.addAccessor(TrackDerivative.class, new TrackDerivativeAccessor());
94 templateContextFactory.addFilter("html", new HtmlFilter());
95 CollectionSortFilter sortFilter = new CollectionSortFilter();
96 sortFilter.addComparator(Artist.class, new Comparator<Artist>() {
99 public int compare(Artist leftArtist, Artist rightArtist) {
100 return leftArtist.getName().compareToIgnoreCase(rightArtist.getName());
104 sortFilter.addComparator(Track.class, new Comparator<Track>() {
107 public int compare(Track leftTrack, Track rightTrack) {
108 return leftTrack.getName().compareToIgnoreCase(rightTrack.getName());
112 sortFilter.addComparator(Style.class, new Comparator<Style>() {
115 public int compare(Style leftStyle, Style rightStyle) {
116 return leftStyle.getName().compareToIgnoreCase(rightStyle.getName());
120 templateContextFactory.addFilter("sort", sortFilter);
121 templateContextFactory.addFilter("matches", new MatchFilter());
123 templateContextFactory.addTemplateObject("core", core);
124 templateContextFactory.addTemplateObject("dataManager", core.getDataManager());
126 templateContextFactory.addProvider(new ClassPathTemplateProvider(getClass(), "/templates/"));
128 for (@SuppressWarnings("rawtypes")
129 Enumeration parameterNames = config.getInitParameterNames(); parameterNames.hasMoreElements();) {
130 String pageName = (String) parameterNames.nextElement();
131 Template template = getTemplate(pageName);
132 String pageClassName = config.getInitParameter(pageName);
134 Class<?> pageClass = Class.forName(pageClassName);
135 @SuppressWarnings("unchecked")
136 Page<ServletRequest> page = (Page<ServletRequest>) pageClass.getConstructor(Core.class, TemplateContextFactory.class, Template.class).newInstance(core, templateContextFactory, template);
137 pages.put(pageName, page);
138 } catch (ClassNotFoundException cnfe1) {
139 cnfe1.printStackTrace();
140 } catch (IllegalArgumentException iae1) {
141 iae1.printStackTrace();
142 } catch (SecurityException se1) {
143 se1.printStackTrace();
144 } catch (InstantiationException ie1) {
145 ie1.printStackTrace();
146 } catch (IllegalAccessException iae1) {
147 iae1.printStackTrace();
148 } catch (InvocationTargetException ite1) {
149 ite1.printStackTrace();
150 } catch (NoSuchMethodException nsme1) {
151 nsme1.printStackTrace();
160 protected void doGet(HttpServletRequest request, HttpServletResponse httpServletResponse) throws ServletException, IOException {
161 request.setCharacterEncoding("UTF-8");
162 String path = request.getPathInfo();
163 if (path.startsWith("/")) {
164 path = path.substring(1);
166 if ((path.length() == 0) || (path.endsWith("/"))) {
169 Page<ServletRequest> page = pages.get(path);
171 ServletRequest servletRequest;
173 servletRequest = new ServletRequest(request, this);
174 } catch (URISyntaxException use1) {
175 throw new IOException("Could not create URI from " + request.getRequestURI(), use1);
177 ByteArrayOutputStream responseOutputBuffer = new ByteArrayOutputStream();
178 Response response = new Response(responseOutputBuffer);
179 response = page.handleRequest(servletRequest, response);
180 for (Header header : response.getHeaders()) {
181 for (String value : header) {
182 httpServletResponse.addHeader(header.getName(), value);
185 httpServletResponse.setContentType(response.getContentType());
186 httpServletResponse.setStatus(response.getStatusCode());
187 StreamCopier.copy(new ByteArrayInputStream(responseOutputBuffer.toByteArray()), httpServletResponse.getOutputStream());
196 protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException {
197 doGet(httpServletRequest, httpServletResponse);
204 private Template getTemplate(String pageName) {
205 InputStream templateInputStream = getClass().getResourceAsStream("/templates/" + pageName);
206 if (templateInputStream == null) {
209 Reader templateReader = null;
211 templateReader = new InputStreamReader(templateInputStream, "UTF-8");
212 return TemplateParser.parse(templateReader);
213 } catch (UnsupportedEncodingException uee1) {
214 /* can not happen. */
215 throw new RuntimeException("Could not parse templates!", uee1);
217 Closer.close(templateReader);
218 Closer.close(templateInputStream);