Java tutorial
/* * Copyright (C) 2014 Toshiaki Maki * * Licensed under 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 am.ik.categolj2.app.feed; import java.io.OutputStreamWriter; import java.util.Date; import java.util.List; import java.util.Map; import java.util.stream.Collectors; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import am.ik.categolj2.domain.model.EntryFormat; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; import org.springframework.web.servlet.view.AbstractView; import com.sun.syndication.feed.synd.SyndContent; import com.sun.syndication.feed.synd.SyndContentImpl; import com.sun.syndication.feed.synd.SyndEntry; import com.sun.syndication.feed.synd.SyndEntryImpl; import com.sun.syndication.feed.synd.SyndFeed; import com.sun.syndication.feed.synd.SyndFeedImpl; @Component public class RssEntryFeedView extends AbstractView { @Value("${categolj2.title}") private String feedTitle; @Value("${categolj2.url}") private String feedLink; @Value("${categolj2.description}") private String feedDescription; public RssEntryFeedView() { setContentType("application/rss+xml"); } @Override protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response) throws Exception { response.setContentType(getContentType()); SyndFeed feed = new SyndFeedImpl(); feed.setTitle(feedTitle); feed.setEncoding("UTF-8"); feed.setLink(feedLink); feed.setPublishedDate(new Date()); feed.setDescription(feedDescription); feed.setFeedType("rss_2.0"); FeedEntries entries = (FeedEntries) model.get("entries"); List<SyndEntry> feedEntries = entries.getEntries().stream().map(e -> { SyndContent description = new SyndContentImpl(); EntryFormat format = EntryFormat.valueOf(e.getFormat().toUpperCase()); description.setValue("<![CDATA[" + format.format(e.getContents()) + "]]>"); description.setType("text/html"); SyndEntry entry = new SyndEntryImpl(); entry.setTitle(e.getTitle()); entry.setLink(feed.getLink() + "#entries/" + e.getId()); entry.setPublishedDate(e.getCreatedDate().toDate()); entry.setUpdatedDate(e.getLastModifiedDate().toDate()); entry.setDescription(description); return entry; }).collect(Collectors.toList()); feed.setEntries(feedEntries); CustomizedWireFeedOutput feedOutput = new CustomizedWireFeedOutput(); ServletOutputStream out = response.getOutputStream(); feedOutput.output(feed.createWireFeed(), new OutputStreamWriter(out, feed.getEncoding()), true); } }