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 * 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.gplus.serializer.util; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.DeserializationContext; import com.fasterxml.jackson.databind.JsonDeserializer; import com.fasterxml.jackson.databind.JsonNode; import com.google.api.client.util.DateTime; import com.google.api.client.util.Lists; import com.google.api.services.plus.model.Activity; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.util.List; /** * Custom deserializer for GooglePlus' Person model */ public class GPlusActivityDeserializer extends JsonDeserializer<Activity> { private final static Logger LOGGER = LoggerFactory.getLogger(GPlusActivityDeserializer.class); /** * Because the GooglePlus Activity object {@link com.google.api.services.plus.model.Activity} contains complex objects * within its hierarchy, we have to use a custom deserializer * * @param jsonParser * @param deserializationContext * @return The deserialized {@link com.google.api.services.plus.model.Activity} object * @throws IOException * @throws JsonProcessingException */ @Override public Activity deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException { JsonNode node = jsonParser.getCodec().readTree(jsonParser); Activity activity = new Activity(); try { activity.setUrl(node.get("url").asText()); activity.setEtag(node.get("etag").asText()); activity.setTitle(node.get("title").asText()); activity.setPublished(DateTime.parseRfc3339(node.get("published").asText())); activity.setUpdated(DateTime.parseRfc3339(node.get("updated").asText())); activity.setId(node.get("id").asText()); activity.setVerb(node.get("verb").asText()); activity.setActor(buildActor(node)); activity.setObject(buildPlusObject(node)); } catch (Exception e) { LOGGER.error("Exception while trying to deserialize activity object: {}", e); } return activity; } /** * Given a raw JsonNode, build out the G+ {@link com.google.api.services.plus.model.Activity.Actor} object * * @param node * @return {@link com.google.api.services.plus.model.Activity.Actor} object */ private Activity.Actor buildActor(JsonNode node) { Activity.Actor actor = new Activity.Actor(); JsonNode actorNode = node.get("actor"); actor.setId(actorNode.get("id").asText()); actor.setDisplayName(actorNode.get("displayName").asText()); actor.setUrl(actorNode.get("url").asText()); Activity.Actor.Image image = new Activity.Actor.Image(); JsonNode imageNode = actorNode.get("image"); image.setUrl(imageNode.get("url").asText()); actor.setImage(image); return actor; } /** * Given a JsonNode, build out all aspects of the {@link com.google.api.services.plus.model.Activity.PlusObject} object * * @param node * @return {@link com.google.api.services.plus.model.Activity.PlusObject} object */ private Activity.PlusObject buildPlusObject(JsonNode node) { Activity.PlusObject object = new Activity.PlusObject(); JsonNode objectNode = node.get("object"); object.setObjectType(objectNode.get("objectType").asText()); object.setContent(objectNode.get("content").asText()); object.setUrl(objectNode.get("url").asText()); Activity.PlusObject.Replies replies = new Activity.PlusObject.Replies(); JsonNode repliesNode = objectNode.get("replies"); replies.setTotalItems(repliesNode.get("totalItems").asLong()); replies.setSelfLink(repliesNode.get("selfLink").asText()); object.setReplies(replies); Activity.PlusObject.Plusoners plusoners = new Activity.PlusObject.Plusoners(); JsonNode plusonersNode = objectNode.get("plusoners"); plusoners.setTotalItems(plusonersNode.get("totalItems").asLong()); plusoners.setSelfLink(plusonersNode.get("selfLink").asText()); object.setPlusoners(plusoners); Activity.PlusObject.Resharers resharers = new Activity.PlusObject.Resharers(); JsonNode resharersNode = objectNode.get("resharers"); resharers.setTotalItems(resharersNode.get("totalItems").asLong()); resharers.setSelfLink(resharersNode.get("selfLink").asText()); object.setResharers(resharers); object.setAttachments(buildAttachments(objectNode));//attachments); return object; } /** * Given a raw JsonNode representation of an Activity's attachments, build out that * list of {@link com.google.api.services.plus.model.Activity.PlusObject.Attachments} objects * * @param objectNode * @return list of {@link com.google.api.services.plus.model.Activity.PlusObject.Attachments} objects */ private List<Activity.PlusObject.Attachments> buildAttachments(JsonNode objectNode) { List<Activity.PlusObject.Attachments> attachments = Lists.newArrayList(); for (JsonNode attachmentNode : objectNode.get("attachments")) { Activity.PlusObject.Attachments attachments1 = new Activity.PlusObject.Attachments(); attachments1.setObjectType(attachmentNode.get("objectType").asText()); attachments1.setDisplayName(attachmentNode.get("displayName").asText()); attachments1.setContent(attachmentNode.get("content").asText()); attachments1.setUrl(attachmentNode.get("url").asText()); Activity.PlusObject.Attachments.Image image1 = new Activity.PlusObject.Attachments.Image(); JsonNode imageNode1 = attachmentNode.get("image"); image1.setUrl(imageNode1.get("url").asText()); attachments1.setImage(image1); attachments.add(attachments1); } return attachments; } }