/*-------------------------------------------------------------------------- * DynamicJson * ver 1.2.0.0 (May. 21th, 2010) * * created and maintained by neuecc * licensed under Microsoft Public License(Ms-PL) * http://neue.cc/ * http://dynamicjson.codeplex.com/ *--------------------------------------------------------------------------*/ using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; using System.Dynamic; using System.IO; using System.Linq; using System.Reflection; using System.Runtime.Serialization.Json; using System.Text; using System.Xml; using System.Xml.Linq; namespace Codeplex.Data { public class DynamicJson : DynamicObject { private enum JsonType { @string, number, boolean, @object, array, @null } // public static methods /// from JsonSring to DynamicJson public static dynamic Parse(string json) { return Parse(json, Encoding.Unicode); } /// from JsonSring to DynamicJson public static dynamic Parse(string json, Encoding encoding) { using (var reader = JsonReaderWriterFactory.CreateJsonReader(encoding.GetBytes(json), XmlDictionaryReaderQuotas.Max)) { return ToValue(XElement.Load(reader)); } } /// from JsonSringStream to DynamicJson public static dynamic Parse(Stream stream) { using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, XmlDictionaryReaderQuotas.Max)) { return ToValue(XElement.Load(reader)); } } /// from JsonSringStream to DynamicJson public static dynamic Parse(Stream stream, Encoding encoding) { using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, encoding, XmlDictionaryReaderQuotas.Max, _ => { })) { return ToValue(XElement.Load(reader)); } } /// create JsonSring from primitive or IEnumerable or Object({public property name:property value}) public static string Serialize(object obj) { return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(GetJsonType(obj)), CreateJsonNode(obj))); } // private static methods private static dynamic ToValue(XElement element) { var type = (JsonType)Enum.Parse(typeof(JsonType), element.Attribute("type").Value); switch (type) { case JsonType.boolean: return (bool)element; case JsonType.number: return (double)element; case JsonType.@string: return (string)element; case JsonType.@object: case JsonType.array: return new DynamicJson(element, type); case JsonType.@null: default: return null; } } private static JsonType GetJsonType(object obj) { if (obj == null) return JsonType.@null; switch (Type.GetTypeCode(obj.GetType())) { case TypeCode.Boolean: return JsonType.boolean; case TypeCode.String: case TypeCode.Char: case TypeCode.DateTime: return JsonType.@string; case TypeCode.Int16: case TypeCode.Int32: case TypeCode.Int64: case TypeCode.UInt16: case TypeCode.UInt32: case TypeCode.UInt64: case TypeCode.Single: case TypeCode.Double: case TypeCode.Decimal: case TypeCode.SByte: case TypeCode.Byte: return JsonType.number; case TypeCode.Object: return (obj is IEnumerable) ? JsonType.array : JsonType.@object; case TypeCode.DBNull: case TypeCode.Empty: default: return JsonType.@null; } } private static XAttribute CreateTypeAttr(JsonType type) { return new XAttribute("type", type.ToString()); } private static object CreateJsonNode(object obj) { var type = GetJsonType(obj); switch (type) { case JsonType.@string: case JsonType.number: return obj; case JsonType.boolean: return obj.ToString().ToLower(); case JsonType.@object: return CreateXObject(obj); case JsonType.array: return CreateXArray(obj as IEnumerable); case JsonType.@null: default: return null; } } private static IEnumerable CreateXArray(T obj) where T : IEnumerable { return obj.Cast() .Select(o => new XStreamingElement("item", CreateTypeAttr(GetJsonType(o)), CreateJsonNode(o))); } private static IEnumerable CreateXObject(object obj) { return obj.GetType() .GetProperties(BindingFlags.Public | BindingFlags.Instance) .Select(pi => new { Name = pi.Name, Value = pi.GetValue(obj, null) }) .Select(a => new XStreamingElement(a.Name, CreateTypeAttr(GetJsonType(a.Value)), CreateJsonNode(a.Value))); } private static string CreateJsonString(XStreamingElement element) { using (var ms = new MemoryStream()) using (var writer = JsonReaderWriterFactory.CreateJsonWriter(ms, Encoding.Unicode)) { element.WriteTo(writer); writer.Flush(); return Encoding.Unicode.GetString(ms.ToArray()); } } // dynamic structure represents JavaScript Object/Array readonly XElement xml; readonly JsonType jsonType; /// create blank JSObject public DynamicJson() { xml = new XElement("root", CreateTypeAttr(JsonType.@object)); jsonType = JsonType.@object; } private DynamicJson(XElement element, JsonType type) { Debug.Assert(type == JsonType.array || type == JsonType.@object); xml = element; jsonType = type; } public bool IsObject { get { return jsonType == JsonType.@object; } } public bool IsArray { get { return jsonType == JsonType.array; } } /// has property or not public bool IsDefined(string name) { return IsObject && (xml.Element(name) != null); } /// has property or not public bool IsDefined(int index) { return IsArray && (xml.Elements().ElementAtOrDefault(index) != null); } /// delete property public bool Delete(string name) { var elem = xml.Element(name); if (elem != null) { elem.Remove(); return true; } else return false; } /// delete property public bool Delete(int index) { var elem = xml.Elements().ElementAtOrDefault(index); if (elem != null) { elem.Remove(); return true; } else return false; } /// mapping to Array or Class by Public PropertyName public T Deserialize() { return (T)Deserialize(typeof(T)); } private object Deserialize(Type type) { return (IsArray) ? DeserializeArray(type) : DeserializeObject(type); } private dynamic DeserializeValue(XElement element, Type elementType) { var value = ToValue(element); if (value is DynamicJson) { value = ((DynamicJson)value).Deserialize(elementType); } return Convert.ChangeType(value, elementType); } private object DeserializeObject(Type targetType) { var result = Activator.CreateInstance(targetType); var dict = targetType.GetProperties(BindingFlags.Public | BindingFlags.Instance) .Where(p => p.CanWrite) .ToDictionary(pi => pi.Name, pi => pi); foreach (var item in xml.Elements()) { PropertyInfo propertyInfo; if (!dict.TryGetValue(item.Name.LocalName, out propertyInfo)) continue; var value = DeserializeValue(item, propertyInfo.PropertyType); propertyInfo.SetValue(result, value, null); } return result; } private object DeserializeArray(Type targetType) { if (targetType.IsArray) // Foo[] { var elemType = targetType.GetElementType(); dynamic array = Array.CreateInstance(elemType, xml.Elements().Count()); var index = 0; foreach (var item in xml.Elements()) { array[index++] = DeserializeValue(item, elemType); } return array; } else // List { var elemType = targetType.GetGenericArguments()[0]; dynamic list = Activator.CreateInstance(targetType); foreach (var item in xml.Elements()) { list.Add(DeserializeValue(item, elemType)); } return list; } } // Delete public override bool TryInvoke(InvokeBinder binder, object[] args, out object result) { result = (IsArray) ? Delete((int)args[0]) : Delete((string)args[0]); return true; } // IsDefined, if has args then TryGetMember public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result) { if (args.Length > 0) { result = null; return false; } result = IsDefined(binder.Name); return true; } // Deserialize or foreach(IEnumerable) public override bool TryConvert(ConvertBinder binder, out object result) { if (binder.Type == typeof(IEnumerable) || binder.Type == typeof(object[])) { var ie = (IsArray) ? xml.Elements().Select(x => ToValue(x)) : xml.Elements().Select(x => (dynamic)new KeyValuePair(x.Name.LocalName, ToValue(x))); result = (binder.Type == typeof(object[])) ? ie.ToArray() : ie; } else { result = Deserialize(binder.Type); } return true; } private bool TryGet(XElement element, out object result) { if (element == null) { result = null; return false; } result = ToValue(element); return true; } public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result) { return (IsArray) ? TryGet(xml.Elements().ElementAtOrDefault((int)indexes[0]), out result) : TryGet(xml.Element((string)indexes[0]), out result); } public override bool TryGetMember(GetMemberBinder binder, out object result) { return (IsArray) ? TryGet(xml.Elements().ElementAtOrDefault(int.Parse(binder.Name)), out result) : TryGet(xml.Element(binder.Name), out result); } private bool TrySet(string name, object value) { var type = GetJsonType(value); var element = xml.Element(name); if (element == null) { xml.Add(new XElement(name, CreateTypeAttr(type), CreateJsonNode(value))); } else { element.Attribute("type").Value = type.ToString(); element.ReplaceNodes(CreateJsonNode(value)); } return true; } private bool TrySet(int index, object value) { var type = GetJsonType(value); var e = xml.Elements().ElementAtOrDefault(index); if (e == null) { xml.Add(new XElement("item", CreateTypeAttr(type), CreateJsonNode(value))); } else { e.Attribute("type").Value = type.ToString(); e.ReplaceNodes(CreateJsonNode(value)); } return true; } public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value) { return (IsArray) ? TrySet((int)indexes[0], value) : TrySet((string)indexes[0], value); } public override bool TrySetMember(SetMemberBinder binder, object value) { return (IsArray) ? TrySet(int.Parse(binder.Name), value) : TrySet(binder.Name, value); } public override IEnumerable GetDynamicMemberNames() { return (IsArray) ? xml.Elements().Select((x, i) => i.ToString()) : xml.Elements().Select(x => x.Name.LocalName); } /// Serialize to JsonString public override string ToString() { // is can't serialize. replace to foreach (var elem in xml.Descendants().Where(x => x.Attribute("type").Value == "null")) { elem.RemoveNodes(); } return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(jsonType), xml.Elements())); } } }