Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * * 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.apache.streams.moreover; import org.apache.streams.data.util.ActivityUtil; import org.apache.streams.pojo.extensions.ExtensionUtil; import org.apache.streams.pojo.json.Activity; import org.apache.streams.pojo.json.ActivityObject; import org.apache.streams.pojo.json.Provider; import com.moreover.api.Article; import com.moreover.api.Author; import com.moreover.api.AuthorPublishingPlatform; import com.moreover.api.Feed; import com.moreover.api.Source; import org.joda.time.DateTime; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import static org.apache.streams.data.util.ActivityUtil.LANGUAGE_EXTENSION; import static org.apache.streams.data.util.ActivityUtil.LOCATION_EXTENSION; import static org.apache.streams.data.util.ActivityUtil.LOCATION_EXTENSION_COUNTRY; import static org.apache.streams.data.util.ActivityUtil.getObjectId; /** * Provides utilities for Moreover data. */ public class MoreoverUtils { private MoreoverUtils() { } public static final String DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'"; /** * convert article into Activity. * @param article article * @return Activity */ public static Activity convert(Article article) { Activity activity = new Activity(); Source source = article.getSource(); activity.setActor(convert(article.getAuthor(), source.getName())); activity.setProvider(convert(source)); activity.setTarget(convertTarget(source)); activity.setObject(convertObject(article)); activity.setPublished(DateTime.parse(article.getPublishedDate())); activity.setContent(article.getContent()); activity.setTitle(article.getTitle()); activity.setVerb("posted"); fixActivityId(activity); addLocationExtension(activity, source); addLanguageExtension(activity, article); activity.setLinks(convertLinks(article)); return activity; } /** * convert Source to Provider. * @param source Source * @return Provider */ public static Provider convert(Source source) { Provider provider = new Provider(); Feed feed = source.getFeed(); String display = getProviderId(feed); provider.setId(ActivityUtil.getProviderId(display.trim().toLowerCase().replace(" ", "_"))); provider.setDisplayName(display); provider.setUrl(feed.getUrl()); return provider; } /** * convert Author and platformName to Actor. * @param author Author * @param platformName platformName * @return $.actor */ public static ActivityObject convert(Author author, String platformName) { ActivityObject actor = new ActivityObject(); AuthorPublishingPlatform platform = author.getPublishingPlatform(); String userId = platform.getUserId(); if (userId != null) { actor.setId(ActivityUtil.getPersonId(getProviderId(platformName), userId)); } actor.setDisplayName(author.getName()); actor.setUrl(author.getHomeUrl()); actor.setSummary(author.getDescription()); actor.setAdditionalProperty("email", author.getEmail()); return actor; } private static void fixActivityId(Activity activity) { if (activity.getId() != null && activity.getId().matches("\\{[a-z]*\\}")) { activity.setId(null); } } private static List convertLinks(Article article) { List<String> list = new LinkedList<>(); Article.OutboundUrls outboundUrls = article.getOutboundUrls(); if (outboundUrls != null) { for (String url : outboundUrls.getOutboundUrl()) { list.add(url); } } return list; } /** * convertTarget. * @param source source * @return ActivityObject $.target */ public static ActivityObject convertTarget(Source source) { ActivityObject object = new ActivityObject(); object.setUrl(source.getHomeUrl()); object.setDisplayName(source.getName()); return object; } /** * convertObject. * @param article article * @return ActivityObject $.object */ public static ActivityObject convertObject(Article article) { ActivityObject object = new ActivityObject(); object.setContent(article.getContent()); object.setSummary(article.getTitle()); object.setUrl(article.getOriginalUrl()); object.setObjectType(article.getDataFormat()); String type = article.getDataFormat().equals("text") ? "article" : article.getDataFormat(); object.setId(getObjectId(getProviderId(article.getSource().getFeed()), type, article.getId())); object.setPublished(DateTime.parse(article.getPublishedDate())); return object; } /** * addLocationExtension. * @param activity Activity * @param source Source */ public static void addLocationExtension(Activity activity, Source source) { Map<String, Object> extensions = ExtensionUtil.getInstance().ensureExtensions(activity); String country = source.getLocation().getCountryCode() == null ? source.getLocation().getCountry() : source.getLocation().getCountryCode(); if (country != null) { Map<String, Object> location = new HashMap<>(); location.put(LOCATION_EXTENSION_COUNTRY, country); extensions.put(LOCATION_EXTENSION, location); } } /** * addLanguageExtension. * @param activity Activity * @param article Article */ public static void addLanguageExtension(Activity activity, Article article) { Map<String, Object> extensions = ExtensionUtil.getInstance().ensureExtensions(activity); String language = article.getLanguage(); if (language != null) { extensions.put(LANGUAGE_EXTENSION, language); } } private static String getProviderId(Feed feed) { return getProviderId( feed.getPublishingPlatform() == null ? feed.getMediaType() : feed.getPublishingPlatform()); } private static String getProviderId(String feed) { return feed.toLowerCase().replace(" ", "_").trim(); } }