Java tutorial
/* * Copyright 2014 Google Inc. All rights reserved. * * 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 com.google.samples.apps.iosched.server.schedule.model; import static com.google.samples.apps.iosched.server.schedule.model.DataModelHelper.get; import static com.google.samples.apps.iosched.server.schedule.model.DataModelHelper.getAsArray; import static com.google.samples.apps.iosched.server.schedule.model.DataModelHelper.getMapValue; import static com.google.samples.apps.iosched.server.schedule.model.DataModelHelper.isHashtag; import static com.google.samples.apps.iosched.server.schedule.model.DataModelHelper.set; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonPrimitive; import com.google.samples.apps.iosched.server.schedule.Config; import com.google.samples.apps.iosched.server.schedule.model.validator.Converters; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; /** * Encapsulation of the rules that maps Vendor data sources to the IOSched data sources. * */ public class DataExtractor { private HashMap<String, JsonObject> videoSessionsById; private HashMap<String, JsonObject> speakersById; private HashMap<String, JsonObject> categoryToTagMap; private HashSet<String> usedSpeakers, usedTags; private JsonElement mainCategory; private boolean obfuscate; public DataExtractor(boolean obfuscate) { this.obfuscate = obfuscate; } public JsonObject extractFromDataSources(JsonDataSources sources) { usedTags = new HashSet<String>(); usedSpeakers = new HashSet<String>(); JsonObject result = new JsonObject(); result.add(OutputJsonKeys.MainTypes.rooms.name(), extractRooms(sources)); JsonArray speakers = extractSpeakers(sources); JsonArray tags = extractTags(sources); result.add(OutputJsonKeys.MainTypes.video_library.name(), extractVideoSessions(sources)); result.add(OutputJsonKeys.MainTypes.sessions.name(), extractSessions(sources)); // Remove tags that are not used on any session (b/14419126) Iterator<JsonElement> tagsIt = tags.iterator(); while (tagsIt.hasNext()) { JsonElement tag = tagsIt.next(); String tagName = get(tag.getAsJsonObject(), OutputJsonKeys.Tags.tag).getAsString(); if (!usedTags.contains(tagName)) { tagsIt.remove(); } } // Remove speakers that are not used on any session: Iterator<JsonElement> it = speakers.iterator(); while (it.hasNext()) { JsonElement el = it.next(); String id = get(el.getAsJsonObject(), OutputJsonKeys.Speakers.id).getAsString(); if (!usedSpeakers.contains(id)) { it.remove(); } } result.add(OutputJsonKeys.MainTypes.speakers.name(), speakers); result.add(OutputJsonKeys.MainTypes.tags.name(), tags); return result; } public JsonArray extractRooms(JsonDataSources sources) { HashSet<String> ids = new HashSet<String>(); JsonArray result = new JsonArray(); JsonDataSource source = sources.getSource(InputJsonKeys.VendorAPISource.MainTypes.rooms.name()); if (source != null) { for (JsonObject origin : source) { JsonObject dest = new JsonObject(); JsonElement originalId = get(origin, InputJsonKeys.VendorAPISource.Rooms.id); String id = Config.ROOM_MAPPING.getRoomId(originalId.getAsString()); if (!ids.contains(id)) { String title = Config.ROOM_MAPPING.getTitle(id, get(origin, InputJsonKeys.VendorAPISource.Rooms.name).getAsString()); set(new JsonPrimitive(id), dest, OutputJsonKeys.Rooms.id); set(originalId, dest, OutputJsonKeys.Rooms.original_id); set(new JsonPrimitive(title), dest, OutputJsonKeys.Rooms.name); result.add(dest); ids.add(id); } } } if (Config.DEBUG_FIX_DATA) { DebugDataExtractorHelper.changeRooms(result); } return result; } public JsonArray extractTags(JsonDataSources sources) { JsonArray result = new JsonArray(); JsonDataSource source = sources.getSource(InputJsonKeys.VendorAPISource.MainTypes.categories.name()); JsonDataSource tagCategoryMappingSource = sources .getSource(InputJsonKeys.ExtraSource.MainTypes.tag_category_mapping.name()); JsonDataSource tagsConfSource = sources.getSource(InputJsonKeys.ExtraSource.MainTypes.tag_conf.name()); categoryToTagMap = new HashMap<String, JsonObject>(); // Only for checking duplicates. HashSet<String> originalTagNames = new HashSet<String>(); if (source != null) { for (JsonObject origin : source) { JsonObject dest = new JsonObject(); // set tag category, looking for parentid in the tag_category_mapping data source JsonElement parentId = get(origin, InputJsonKeys.VendorAPISource.Categories.parentid); // Ignore categories with null parents, because they are roots (tag categories). if (parentId != null && !parentId.getAsString().equals("")) { JsonElement category = null; if (tagCategoryMappingSource != null) { JsonObject categoryMapping = tagCategoryMappingSource .getElementById(parentId.getAsString()); if (categoryMapping != null) { category = get(categoryMapping, InputJsonKeys.ExtraSource.CategoryTagMapping.tag_name); JsonPrimitive isDefault = (JsonPrimitive) get(categoryMapping, InputJsonKeys.ExtraSource.CategoryTagMapping.is_default); if (isDefault != null && isDefault.getAsBoolean()) { mainCategory = category; } } set(category, dest, OutputJsonKeys.Tags.category); } // Ignore categories unrecognized parents (no category) if (category == null) { continue; } // Tag name is by convention: "TAGCATEGORY_TAGNAME" JsonElement name = get(origin, InputJsonKeys.VendorAPISource.Categories.name); JsonElement tagName = new JsonPrimitive( category.getAsString() + "_" + Converters.TAG_NAME.convert(name).getAsString()); JsonElement originalTagName = tagName; if (obfuscate) { name = Converters.OBFUSCATE.convert(name); tagName = new JsonPrimitive( category.getAsString() + "_" + Converters.TAG_NAME.convert(name).getAsString()); } set(tagName, dest, OutputJsonKeys.Tags.tag); set(name, dest, OutputJsonKeys.Tags.name); set(origin, InputJsonKeys.VendorAPISource.Categories.id, dest, OutputJsonKeys.Tags.original_id); set(origin, InputJsonKeys.VendorAPISource.Categories.description, dest, OutputJsonKeys.Tags._abstract, obfuscate ? Converters.OBFUSCATE : null); if (tagsConfSource != null) { JsonObject tagConf = tagsConfSource.getElementById(originalTagName.getAsString()); if (tagConf != null) { set(tagConf, InputJsonKeys.ExtraSource.TagConf.order_in_category, dest, OutputJsonKeys.Tags.order_in_category); set(tagConf, InputJsonKeys.ExtraSource.TagConf.color, dest, OutputJsonKeys.Tags.color); set(tagConf, InputJsonKeys.ExtraSource.TagConf.hashtag, dest, OutputJsonKeys.Tags.hashtag); } } categoryToTagMap.put(get(origin, InputJsonKeys.VendorAPISource.Categories.id).getAsString(), dest); if (originalTagNames.add(originalTagName.getAsString())) { result.add(dest); } } } } if (Config.DEBUG_FIX_DATA) { DebugDataExtractorHelper.changeCategories(categoryToTagMap, result); } return result; } public JsonArray extractSpeakers(JsonDataSources sources) { speakersById = new HashMap<String, JsonObject>(); JsonArray result = new JsonArray(); JsonDataSource source = sources.getSource(InputJsonKeys.VendorAPISource.MainTypes.speakers.name()); if (source != null) { for (JsonObject origin : source) { JsonObject dest = new JsonObject(); JsonElement id = get(origin, InputJsonKeys.VendorAPISource.Speakers.id); set(id, dest, OutputJsonKeys.Speakers.id); set(origin, InputJsonKeys.VendorAPISource.Speakers.name, dest, OutputJsonKeys.Speakers.name, obfuscate ? Converters.OBFUSCATE : null); set(origin, InputJsonKeys.VendorAPISource.Speakers.bio, dest, OutputJsonKeys.Speakers.bio, obfuscate ? Converters.OBFUSCATE : null); set(origin, InputJsonKeys.VendorAPISource.Speakers.companyname, dest, OutputJsonKeys.Speakers.company, obfuscate ? Converters.OBFUSCATE : null); JsonElement originalPhoto = get(origin, InputJsonKeys.VendorAPISource.Speakers.photo); if (originalPhoto != null && !"".equals(originalPhoto.getAsString())) { // Note that the input for SPEAKER_PHOTO_ID converter is the entity ID. We simply ignore the original // photo URL, because that will be processed by an offline cron script, resizing the // photos and saving them to a known location with the entity ID as its base name. set(origin, InputJsonKeys.VendorAPISource.Speakers.id, dest, OutputJsonKeys.Speakers.thumbnailUrl, Converters.SPEAKER_PHOTO_URL); } JsonElement info = origin.get(InputJsonKeys.VendorAPISource.Speakers.info.name()); JsonPrimitive plusUrl = getMapValue(info, InputJsonKeys.VendorAPISource.Speakers.INFO_PUBLIC_PLUS_ID, Converters.GPLUS_URL, null); if (plusUrl != null) { set(plusUrl, dest, OutputJsonKeys.Speakers.plusoneUrl); } JsonPrimitive twitter = getMapValue(info, InputJsonKeys.VendorAPISource.Speakers.INFO_PUBLIC_TWITTER, Converters.TWITTER_URL, null); if (twitter != null) { set(twitter, dest, OutputJsonKeys.Speakers.twitterUrl); } result.add(dest); speakersById.put(id.getAsString(), dest); } } return result; } public JsonArray extractSessions(JsonDataSources sources) { if (videoSessionsById == null) { throw new IllegalStateException( "You need to extract video sessions before attempting to extract sessions"); } if (categoryToTagMap == null) { throw new IllegalStateException("You need to extract tags before attempting to extract sessions"); } JsonArray result = new JsonArray(); JsonDataSource source = sources.getSource(InputJsonKeys.VendorAPISource.MainTypes.topics.name()); if (source != null) { for (JsonObject origin : source) { if (isVideoSession(origin)) { // Sessions with the Video tag are processed as video library content continue; } if (isHiddenSession(origin)) { // Sessions with a "Hidden from schedule" flag should be ignored continue; } JsonElement title = get(origin, InputJsonKeys.VendorAPISource.Topics.title); // Since the CMS returns an empty keynote as a session, we need to ignore it if (title != null && title.isJsonPrimitive() && "keynote".equalsIgnoreCase(title.getAsString())) { continue; } JsonObject dest = new JsonObject(); // Some sessions require a special ID, so we replace it here... if (title != null && title.isJsonPrimitive() && "after hours".equalsIgnoreCase(title.getAsString())) { set(new JsonPrimitive("__afterhours__"), dest, OutputJsonKeys.Sessions.id); } else { set(origin, InputJsonKeys.VendorAPISource.Topics.id, dest, OutputJsonKeys.Sessions.id); } set(origin, InputJsonKeys.VendorAPISource.Topics.id, dest, OutputJsonKeys.Sessions.url, Converters.SESSION_URL); set(origin, InputJsonKeys.VendorAPISource.Topics.title, dest, OutputJsonKeys.Sessions.title, obfuscate ? Converters.OBFUSCATE : null); set(origin, InputJsonKeys.VendorAPISource.Topics.description, dest, OutputJsonKeys.Sessions.description, obfuscate ? Converters.OBFUSCATE : null); set(origin, InputJsonKeys.VendorAPISource.Topics.start, dest, OutputJsonKeys.Sessions.startTimestamp, Converters.DATETIME); set(origin, InputJsonKeys.VendorAPISource.Topics.finish, dest, OutputJsonKeys.Sessions.endTimestamp, Converters.DATETIME); set(new JsonPrimitive(isFeatured(origin)), dest, OutputJsonKeys.Sessions.isFeatured); JsonElement documents = get(origin, InputJsonKeys.VendorAPISource.Topics.documents); if (documents != null && documents.isJsonArray() && documents.getAsJsonArray().size() > 0) { // Note that the input for SessionPhotoURL is the entity ID. We simply ignore the original // photo URL, because that will be processed by an offline cron script, resizing the // photos and saving them to a known location with the entity ID as its base name. set(origin, InputJsonKeys.VendorAPISource.Topics.id, dest, OutputJsonKeys.Sessions.photoUrl, Converters.SESSION_PHOTO_URL); } setVideoPropertiesInSession(origin, dest); setRelatedContent(origin, dest); JsonElement mainTag = null; JsonElement hashtag = null; JsonElement mainTagColor = null; JsonArray categories = origin .getAsJsonArray(InputJsonKeys.VendorAPISource.Topics.categoryids.name()); JsonArray tags = new JsonArray(); for (JsonElement category : categories) { JsonObject tag = categoryToTagMap.get(category.getAsString()); if (tag != null) { JsonElement tagName = get(tag, OutputJsonKeys.Tags.tag); tags.add(tagName); usedTags.add(tagName.getAsString()); if (mainTag == null) { // check if the tag is from a "default" category. For example, if THEME is the default // category, all sessions will have a "mainTag" property set to the first tag of type THEME JsonElement tagCategory = get(tag, OutputJsonKeys.Tags.category); // THEME, TYPE or TOPIC if (tagCategory.equals(mainCategory)) { mainTag = tagName; mainTagColor = get(tag, OutputJsonKeys.Tags.color); } if (hashtag == null && isHashtag(tag)) { hashtag = get(tag, OutputJsonKeys.Tags.hashtag); if (hashtag == null || hashtag.getAsString() == null || hashtag.getAsString().isEmpty()) { // If no hashtag set in the tagsconf file, we will convert the tagname to find one: hashtag = new JsonPrimitive( get(tag, OutputJsonKeys.Tags.name, Converters.TAG_NAME).getAsString() .toLowerCase()); } } } } } set(tags, dest, OutputJsonKeys.Sessions.tags); if (mainTag != null) { set(mainTag, dest, OutputJsonKeys.Sessions.mainTag); } if (mainTagColor != null) { set(mainTagColor, dest, OutputJsonKeys.Sessions.color); } if (hashtag != null) { set(hashtag, dest, OutputJsonKeys.Sessions.hashtag); } JsonArray speakers = getAsArray(origin, InputJsonKeys.VendorAPISource.Topics.speakerids); if (speakers != null) for (JsonElement speaker : speakers) { String speakerId = speaker.getAsString(); usedSpeakers.add(speakerId); } set(speakers, dest, OutputJsonKeys.Sessions.speakers); JsonArray sessions = origin.getAsJsonArray(InputJsonKeys.VendorAPISource.Topics.sessions.name()); if (sessions != null && sessions.size() > 0) { String roomId = get(sessions.get(0).getAsJsonObject(), InputJsonKeys.VendorAPISource.Sessions.roomid).getAsString(); roomId = Config.ROOM_MAPPING.getRoomId(roomId); set(new JsonPrimitive(roomId), dest, OutputJsonKeys.Sessions.room); // captions URL is set based on the session room, so keep it here. String captionsURL = Config.ROOM_MAPPING.getCaptions(roomId); if (captionsURL != null) { set(new JsonPrimitive(captionsURL), dest, OutputJsonKeys.Sessions.captionsUrl); } } if (Config.DEBUG_FIX_DATA) { DebugDataExtractorHelper.changeSession(dest, usedTags); } result.add(dest); } } return result; } public JsonArray extractVideoSessions(JsonDataSources sources) { videoSessionsById = new HashMap<String, JsonObject>(); if (categoryToTagMap == null) { throw new IllegalStateException("You need to extract tags before attempting to extract video sessions"); } if (speakersById == null) { throw new IllegalStateException( "You need to extract speakers before attempting to extract video sessions"); } JsonArray result = new JsonArray(); JsonDataSource source = sources.getSource(InputJsonKeys.VendorAPISource.MainTypes.topics.name()); if (source != null) { for (JsonObject origin : source) { if (!isVideoSession(origin)) { continue; } if (isHiddenSession(origin)) { // Sessions with a "Hidden from schedule" flag should be ignored continue; } JsonObject dest = new JsonObject(); JsonPrimitive vid = setVideoForVideoSession(origin, dest); JsonElement id = get(origin, InputJsonKeys.VendorAPISource.Topics.id); // video library id must be the Youtube video id set(vid, dest, OutputJsonKeys.VideoLibrary.id); set(origin, InputJsonKeys.VendorAPISource.Topics.title, dest, OutputJsonKeys.VideoLibrary.title, obfuscate ? Converters.OBFUSCATE : null); set(origin, InputJsonKeys.VendorAPISource.Topics.description, dest, OutputJsonKeys.VideoLibrary.desc, obfuscate ? Converters.OBFUSCATE : null); set(new JsonPrimitive(Config.CONFERENCE_YEAR), dest, OutputJsonKeys.VideoLibrary.year); JsonElement videoTopic = null; JsonArray categories = origin .getAsJsonArray(InputJsonKeys.VendorAPISource.Topics.categoryids.name()); for (JsonElement category : categories) { JsonObject tag = categoryToTagMap.get(category.getAsString()); if (tag != null) { if (isHashtag(tag)) { videoTopic = get(tag, OutputJsonKeys.Tags.name); // by definition, the first tag that can be a hashtag (usually a TOPIC) is considered the video tag break; } } } if (videoTopic != null) { set(videoTopic, dest, OutputJsonKeys.VideoLibrary.topic); } // Concatenate speakers: JsonArray speakers = getAsArray(origin, InputJsonKeys.VendorAPISource.Topics.speakerids); StringBuilder sb = new StringBuilder(); if (speakers != null) for (int i = 0; i < speakers.size(); i++) { String speakerId = speakers.get(i).getAsString(); usedSpeakers.add(speakerId); JsonObject speaker = speakersById.get(speakerId); if (speaker != null) { sb.append(get(speaker, OutputJsonKeys.Speakers.name).getAsString()); if (i < speakers.size() - 1) sb.append(", "); } } set(new JsonPrimitive(sb.toString()), dest, OutputJsonKeys.VideoLibrary.speakers); videoSessionsById.put(id.getAsString(), dest); result.add(dest); } } return result; } private boolean isVideoSession(JsonObject sessionObj) { JsonArray tags = sessionObj.getAsJsonArray(InputJsonKeys.VendorAPISource.Topics.categoryids.name()); for (JsonElement category : tags) { if (Config.VIDEO_CATEGORY.equals(category.getAsString())) { return true; } } return false; } private boolean isHiddenSession(JsonObject sessionObj) { JsonPrimitive hide = getMapValue(get(sessionObj, InputJsonKeys.VendorAPISource.Topics.info), InputJsonKeys.VendorAPISource.Topics.INFO_HIDDEN_SESSION, Converters.BOOLEAN, null); if (hide != null && hide.isBoolean() && hide.getAsBoolean()) { return true; } return false; } private boolean isLivestreamed(JsonObject sessionObj) { // data generated after the end of the conference should never have livestream URLs long endOfConference = Config.CONFERENCE_DAYS[Config.CONFERENCE_DAYS.length - 1][1]; if (System.currentTimeMillis() > endOfConference) { return false; } JsonPrimitive livestream = getMapValue(get(sessionObj, InputJsonKeys.VendorAPISource.Topics.info), InputJsonKeys.VendorAPISource.Topics.INFO_IS_LIVE_STREAM, null, null); return livestream != null && "true".equalsIgnoreCase(livestream.getAsString()); } /** Check whether a session is featured or not. * * @param sessionObj Session to check * @return True if featured, false otherwise. */ private boolean isFeatured(JsonObject sessionObj) { // Extract "Featured Session" flag from EventPoint "info" block. JsonPrimitive featured = getMapValue(get(sessionObj, InputJsonKeys.VendorAPISource.Topics.info), InputJsonKeys.VendorAPISource.Topics.INFO_FEATURED_SESSION, Converters.BOOLEAN, null); if (featured != null && featured.isBoolean() && featured.getAsBoolean()) { return true; } return false; } private void setVideoPropertiesInSession(JsonObject origin, JsonObject dest) { boolean isLivestream = isLivestreamed(origin); set(new JsonPrimitive(isLivestream), dest, OutputJsonKeys.Sessions.isLivestream); JsonPrimitive vid = null; if (isLivestream) { vid = getVideoFromTopicInfo(origin, InputJsonKeys.VendorAPISource.Topics.INFO_STREAM_VIDEO_ID, Config.VIDEO_LIVESTREAMURL_FOR_EMPTY); } else { vid = getMapValue(get(origin, InputJsonKeys.VendorAPISource.Topics.info), InputJsonKeys.VendorAPISource.Topics.INFO_VIDEO_URL, Converters.YOUTUBE_URL, null); } if (vid != null && !vid.getAsString().isEmpty()) { set(vid, dest, OutputJsonKeys.Sessions.youtubeUrl); } } private JsonPrimitive getVideoFromTopicInfo(JsonObject origin, String sourceInfoKey, String defaultVideoUrl) { JsonPrimitive result = null; if (!obfuscate) { JsonPrimitive vid = getMapValue(get(origin, InputJsonKeys.VendorAPISource.Topics.info), sourceInfoKey, null, defaultVideoUrl); if (vid != null && !vid.getAsString().isEmpty()) { result = vid; } } return (result == null && defaultVideoUrl != null) ? new JsonPrimitive(defaultVideoUrl) : result; } private JsonPrimitive setVideoForVideoSession(JsonObject origin, JsonObject dest) { JsonPrimitive vid = getVideoFromTopicInfo(origin, InputJsonKeys.VendorAPISource.Topics.INFO_VIDEO_URL, null); if (vid != null) { set(vid, dest, OutputJsonKeys.VideoLibrary.vid); JsonPrimitive thumbnail = new JsonPrimitive( "http://img.youtube.com/vi/" + vid.getAsString() + "/hqdefault.jpg"); set(thumbnail, dest, OutputJsonKeys.VideoLibrary.thumbnailUrl); } return vid; } @Deprecated private void setRelatedVideos(JsonObject origin, JsonObject dest) { JsonArray related = getAsArray(origin, InputJsonKeys.VendorAPISource.Topics.related); if (related == null) { return; } for (JsonElement el : related) { if (!el.isJsonObject()) { continue; } JsonObject obj = el.getAsJsonObject(); if (!obj.has("name") || !obj.has("values")) { continue; } if (InputJsonKeys.VendorAPISource.Topics.RELATED_NAME_VIDEO .equals(obj.getAsJsonPrimitive("name").getAsString())) { JsonElement values = obj.get("values"); if (!values.isJsonArray()) { continue; } // As per the data specification, related content is formatted as // "video1 title1\nvideo2 title2\n..." StringBuilder relatedContentStr = new StringBuilder(); for (JsonElement value : values.getAsJsonArray()) { String relatedSessionId = value.getAsString(); JsonObject relatedVideo = videoSessionsById.get(relatedSessionId); if (relatedVideo != null) { JsonElement vid = get(relatedVideo, OutputJsonKeys.VideoLibrary.vid); JsonElement title = get(relatedVideo, OutputJsonKeys.VideoLibrary.title); if (vid != null && title != null) { relatedContentStr.append(vid.getAsString()).append(" ").append(title.getAsString()) .append("\n"); } } } set(new JsonPrimitive(relatedContentStr.toString()), dest, OutputJsonKeys.Sessions.relatedContent); } } } private void setRelatedContent(JsonObject origin, JsonObject dest) { JsonArray related = getAsArray(origin, InputJsonKeys.VendorAPISource.Topics.related); JsonArray outputArray = new JsonArray(); if (related == null) { return; } for (JsonElement el : related) { if (!el.isJsonObject()) { continue; } JsonObject obj = el.getAsJsonObject(); if (!obj.has("name") || !obj.has("values")) { continue; } if (InputJsonKeys.VendorAPISource.Topics.RELATED_NAME_SESSIONS .equals(obj.getAsJsonPrimitive("name").getAsString())) { JsonElement values = obj.get("topics"); if (!values.isJsonArray()) { continue; } // As per the data specification, related content is formatted as // "video1 title1\nvideo2 title2\n..." for (JsonElement topic : values.getAsJsonArray()) { if (!topic.isJsonObject()) { continue; } JsonObject topicObj = topic.getAsJsonObject(); String id = get(topicObj, InputJsonKeys.VendorAPISource.RelatedTopics.id).getAsString(); String title = get(topicObj, InputJsonKeys.VendorAPISource.RelatedTopics.title).getAsString(); if (id != null && title != null) { JsonObject outputObj = new JsonObject(); set(new JsonPrimitive(id), outputObj, OutputJsonKeys.RelatedContent.id); set(new JsonPrimitive(title), outputObj, OutputJsonKeys.RelatedContent.title); outputArray.add(outputObj); } } set(outputArray, dest, OutputJsonKeys.Sessions.relatedContent); } } } }