| // 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. |
| |
| using Newtonsoft.Json; |
| using Newtonsoft.Json.Converters; |
| using Newtonsoft.Json.Linq; |
| using Org.Apache.REEF.Tang.Annotations; |
| |
| namespace Org.Apache.REEF.Client.YARN.RestClient |
| { |
| /// <summary> |
| /// Simple implementation of JSON deserializer by using Newtonsoft JSON lib |
| /// </summary> |
| internal sealed class RestJsonDeserializer : IDeserializer |
| { |
| [Inject] |
| private RestJsonDeserializer() |
| { |
| } |
| |
| public T Deserialize<T>(string contentString, string rootElement) |
| { |
| /* If root element is not empty, then we want to |
| * skip the top level token and parse only one level deeper |
| * For instance: |
| * { |
| * "app" : { |
| * "state" : "FINISHED", |
| * "user" : "user1", |
| * } |
| * } |
| * when used without this code will need an extra wrapper class |
| * around a class that has `state` and `user` fields. |
| * |
| * public class AppResponse |
| * { |
| * public Application App { get;set } |
| * } |
| * |
| * This logic helps us avoid such classes. |
| */ |
| if (string.IsNullOrEmpty(rootElement)) |
| { |
| return JsonConvert.DeserializeObject<T>(contentString, new StringEnumConverter()); |
| } |
| |
| var jobject = JObject.Parse(contentString); |
| var jtoken = jobject[rootElement]; |
| var jsonSerializer = new JsonSerializer(); |
| jsonSerializer.Converters.Add(new StringEnumConverter()); |
| return jtoken.ToObject<T>(jsonSerializer); |
| } |
| } |
| } |