Java tutorial
/** * myJerry | Evenstar * Copyright (C) 2010 myJerry Development Team * http://www.myjerry.org * * The file is licensed under the the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * * See the License for the specific language governing permissions and * limitations under the License. * */ package org.myjerry.evenstar.web.blog; import java.util.ArrayList; import java.util.Collection; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.logging.Logger; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.velocity.app.VelocityEngine; import org.myjerry.evenstar.constants.BlogPreferenceConstants; import org.myjerry.evenstar.helper.ControllerHelper; import org.myjerry.evenstar.helper.TemplateHelper; import org.myjerry.evenstar.model.Blog; import org.myjerry.evenstar.model.BlogPost; import org.myjerry.evenstar.service.BlogLayoutService; import org.myjerry.evenstar.service.BlogPostService; import org.myjerry.evenstar.service.BlogPreferenceService; import org.myjerry.evenstar.service.BlogService; import org.myjerry.evenstar.service.UserService; import org.myjerry.evenstar.service.ViewPostService; import org.myjerry.evenstar.web.EvenstarController; import org.myjerry.util.ServerUtils; import org.myjerry.util.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.servlet.ModelAndView; public class BlogHomeController extends EvenstarController { private static final Logger log = Logger.getLogger(BlogHomeController.class.getName()); @Autowired private BlogService blogService; @Autowired private BlogPreferenceService blogPreferenceService; @Autowired private BlogPostService blogPostService; @Autowired private VelocityEngine velocityEngine; @Autowired private BlogLayoutService blogLayoutService; @Autowired private ViewPostService viewPostService; @Autowired private UserService userService; @SuppressWarnings("unchecked") public ModelAndView view(HttpServletRequest request, HttpServletResponse response) throws Exception { Long older = StringUtils.getLong(request.getParameter("older")); Long newer = StringUtils.getLong(request.getParameter("newer")); ModelAndView mav = getModelAndView(request); Long blogID = ControllerHelper.convertToBlogID(request, this.blogService); if (blogID == null) { mav.setViewName(".evenstar"); } else { Map<String, Object> model = new HashMap<String, Object>(); Blog blog = this.blogService.getBlog(blogID); String numPostsString = this.blogPreferenceService.getPreference(blogID, BlogPreferenceConstants.showNumPosts); int numPosts = 10; if (StringUtils.isNotEmpty(numPostsString)) { numPosts = Integer.valueOf(numPostsString); } Collection<BlogPost> postsCollection = null; if (older == null && newer == null) { postsCollection = this.blogPostService.getBlogPosts(blogID, numPosts); } else { if (older != null && newer != null) { postsCollection = this.blogPostService.getBlogPosts(blogID, numPosts, older, newer); } else if (older != null) { Date lastUpdatedDate = ServerUtils.getUniversalDate(older); postsCollection = this.blogPostService.getOlderBlogPosts(blogID, numPosts, lastUpdatedDate); } else if (newer != null) { Date lastUpdatedDate = ServerUtils.getUniversalDate(newer); postsCollection = this.blogPostService.getNewerBlogPosts(blogID, numPosts, lastUpdatedDate); } } List<BlogPost> posts = null; if (postsCollection != null) { posts = new ArrayList<BlogPost>(postsCollection); } else { posts = new ArrayList<BlogPost>(); } if (posts != null && posts.size() > 0) { if (posts.size() > numPosts) { int last = posts.size() - 1; BlogPost lastPost = posts.get(last); model.put("olderPageUrl", "/showPosts.html?older=" + ServerUtils.getUniversalDateString(lastPost.getPostedDate())); posts.remove(last); } else { model.put("olderPageUrl", ""); } if (!this.blogPostService.isFirstPost(posts.get(0))) { model.put("newerPageUrl", "/showPosts.html?newer=" + ServerUtils.getUniversalDateString(posts.get(0).getPostedDate())); } else { model.put("newerPageUrl", ""); } } model.putAll(mav.getModel()); model = this.viewPostService.getPostsViewModel(blog, posts, false, model); String generatedBlogPage = TemplateHelper.generateBlogPage(blogID, model, blogLayoutService, velocityEngine); mav.addAllObjects(model); mav.addObject("generatedBlogPage", generatedBlogPage); mav.setViewName(".view.blog.home"); } return mav; } /** * @return the blogService */ public BlogService getBlogService() { return blogService; } /** * @param blogService the blogService to set */ public void setBlogService(BlogService blogService) { this.blogService = blogService; } /** * @return the blogPreferenceService */ public BlogPreferenceService getBlogPreferenceService() { return blogPreferenceService; } /** * @param blogPreferenceService the blogPreferenceService to set */ public void setBlogPreferenceService(BlogPreferenceService blogPreferenceService) { this.blogPreferenceService = blogPreferenceService; } /** * @return the blogPostService */ public BlogPostService getBlogPostService() { return blogPostService; } /** * @param blogPostService the blogPostService to set */ public void setBlogPostService(BlogPostService blogPostService) { this.blogPostService = blogPostService; } /** * @return the velocityEngine */ public VelocityEngine getVelocityEngine() { return velocityEngine; } /** * @param velocityEngine the velocityEngine to set */ public void setVelocityEngine(VelocityEngine velocityEngine) { this.velocityEngine = velocityEngine; } /** * @return the blogLayoutService */ public BlogLayoutService getBlogLayoutService() { return blogLayoutService; } /** * @param blogLayoutService the blogLayoutService to set */ public void setBlogLayoutService(BlogLayoutService blogLayoutService) { this.blogLayoutService = blogLayoutService; } /** * @return the viewPostService */ public ViewPostService getViewPostService() { return viewPostService; } /** * @param viewPostService the viewPostService to set */ public void setViewPostService(ViewPostService viewPostService) { this.viewPostService = viewPostService; } /** * @return the userService */ public UserService getUserService() { return userService; } /** * @param userService the userService to set */ public void setUserService(UserService userService) { this.userService = userService; } }