Java tutorial
/* * Copyright 2016 Cask Data, Inc. * * 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 co.cask.cdap.proto.codec; import co.cask.cdap.api.customaction.CustomActionSpecification; import co.cask.cdap.internal.customaction.DefaultCustomActionSpecification; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParseException; import com.google.gson.JsonPrimitive; import com.google.gson.JsonSerializationContext; import java.lang.reflect.Type; import java.util.Map; import java.util.Set; /** * Codec to serialize and deserialize {@link CustomActionSpecification}. */ public class CustomActionSpecificationCodec extends AbstractSpecificationCodec<CustomActionSpecification> { @Override public CustomActionSpecification deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { JsonObject jsonObj = json.getAsJsonObject(); String className = jsonObj.get("className").getAsString(); String name = jsonObj.get("name").getAsString(); String description = jsonObj.get("description").getAsString(); Set<String> datasets = deserializeSet(jsonObj.get("datasets"), context, String.class); Map<String, String> properties = deserializeMap(jsonObj.get("properties"), context, String.class); return new DefaultCustomActionSpecification(className, name, description, properties, datasets); } @Override public JsonElement serialize(CustomActionSpecification src, Type typeOfSrc, JsonSerializationContext context) { JsonObject jsonObj = new JsonObject(); jsonObj.add("className", new JsonPrimitive(src.getClassName())); jsonObj.add("name", new JsonPrimitive(src.getName())); jsonObj.add("description", new JsonPrimitive(src.getDescription())); jsonObj.add("datasets", serializeSet(src.getDatasets(), context, String.class)); jsonObj.add("properties", serializeMap(src.getProperties(), context, String.class)); return jsonObj; } }