/* * 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 org.apache.zeppelin.helium; import com.google.gson.*; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Type; import java.net.URI; import java.net.URISyntaxException; /** * HeliumRegistrySerializer (and deserializer) for gson */ public class HeliumRegistrySerializer implements JsonSerializer<HeliumRegistry>, JsonDeserializer<HeliumRegistry> { Logger logger = LoggerFactory.getLogger(HeliumRegistrySerializer.class); @Override public HeliumRegistry deserialize(JsonElement json, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException { JsonObject jsonObject = json.getAsJsonObject(); String className = jsonObject.get("class").getAsString(); String uri = jsonObject.get("uri").getAsString(); String name = jsonObject.get("name").getAsString(); try { logger.info("Restore helium registry {} {} {}", name, className, uri); Class<HeliumRegistry> cls = (Class<HeliumRegistry>) getClass().getClassLoader().loadClass(className); Constructor<HeliumRegistry> constructor = cls.getConstructor(String.class, String.class); HeliumRegistry registry = constructor.newInstance(name, uri); return registry; } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InstantiationException | InvocationTargetException e) { logger.error(e.getMessage(), e); return null; } } @Override public JsonElement serialize(HeliumRegistry heliumRegistry, Type type, JsonSerializationContext jsonSerializationContext) { JsonObject json = new JsonObject(); json.addProperty("class", heliumRegistry.getClass().getName()); json.addProperty("uri", heliumRegistry.uri()); json.addProperty("name", heliumRegistry.name()); return json; } }