141 lines
4.3 KiB
C#
141 lines
4.3 KiB
C#
#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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using Newtonsoft.Json.Linq;
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using System;
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using System.Collections.Generic;
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using System.Text;
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#if DNXCORE50
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using Xunit;
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using Test = Xunit.FactAttribute;
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using Assert = Newtonsoft.Json.Tests.XUnitAssert;
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#else
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using NUnit.Framework;
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#endif
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#if NET20
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using Newtonsoft.Json.Utilities.LinqBridge;
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#else
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using System.Linq;
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#endif
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namespace Newtonsoft.Json.Tests.Documentation.Samples.Serializer
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{
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[TestFixture]
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public class CustomJsonConverter : TestFixtureBase
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{
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#region Types
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public class KeysJsonConverter : JsonConverter
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{
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private readonly Type[] _types;
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public KeysJsonConverter(params Type[] types)
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{
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_types = types;
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}
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public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
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{
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JToken t = JToken.FromObject(value);
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if (t.Type != JTokenType.Object)
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{
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t.WriteTo(writer);
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}
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else
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{
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JObject o = (JObject)t;
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IList<string> propertyNames = o.Properties().Select(p => p.Name).ToList();
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o.AddFirst(new JProperty("Keys", new JArray(propertyNames)));
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o.WriteTo(writer);
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}
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}
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public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
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{
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throw new NotImplementedException("Unnecessary because CanRead is false. The type will skip the converter.");
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}
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public override bool CanRead
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{
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get { return false; }
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}
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public override bool CanConvert(Type objectType)
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{
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return _types.Any(t => t == objectType);
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}
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}
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public class Employee
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{
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public string FirstName { get; set; }
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public string LastName { get; set; }
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public IList<string> Roles { get; set; }
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}
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#endregion
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[Test]
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public void Example()
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{
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#region Usage
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Employee employee = new Employee
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{
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FirstName = "James",
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LastName = "Newton-King",
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Roles = new List<string>
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{
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"Admin"
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}
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};
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string json = JsonConvert.SerializeObject(employee, Formatting.Indented, new KeysJsonConverter(typeof(Employee)));
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Console.WriteLine(json);
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// {
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// "Keys": [
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// "FirstName",
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// "LastName",
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// "Roles"
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// ],
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// "FirstName": "James",
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// "LastName": "Newton-King",
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// "Roles": [
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// "Admin"
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// ]
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// }
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Employee newEmployee = JsonConvert.DeserializeObject<Employee>(json, new KeysJsonConverter(typeof(Employee)));
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Console.WriteLine(newEmployee.FirstName);
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// James
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#endregion
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Assert.AreEqual("James", newEmployee.FirstName);
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}
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}
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} |