[101] | 1 | /*--------------------------------------------------------------------------
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| 2 | * DynamicJson
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| 3 | * ver 1.2.0.0 (May. 21th, 2010)
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| 4 | *
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| 5 | * created and maintained by neuecc <ils@neue.cc>
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| 6 | * licensed under Microsoft Public License(Ms-PL)
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| 7 | * http://neue.cc/
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| 8 | * http://dynamicjson.codeplex.com/
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| 9 | *--------------------------------------------------------------------------*/
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| 10 | using System;
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| 11 | using System.Collections;
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| 12 | using System.Collections.Generic;
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| 13 | using System.Diagnostics;
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| 14 | using System.Dynamic;
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| 15 | using System.IO;
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| 16 | using System.Linq;
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| 17 | using System.Reflection;
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| 18 | using System.Runtime.Serialization.Json;
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| 19 | using System.Text;
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| 20 | using System.Xml;
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| 21 | using System.Xml.Linq;
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| 22 |
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| 23 | namespace Codeplex.Data
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| 24 | {
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| 25 | public class DynamicJson : DynamicObject
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| 26 | {
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| 27 | private enum JsonType
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| 28 | {
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| 29 | @string, number, boolean, @object, array, @null
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| 30 | }
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| 31 |
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| 32 | // public static methods
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| 33 |
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| 34 | /// <summary>from JsonSring to DynamicJson</summary>
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| 35 | public static dynamic Parse(string json)
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| 36 | {
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| 37 | return Parse(json, Encoding.Unicode);
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| 38 | }
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| 39 |
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| 40 | /// <summary>from JsonSring to DynamicJson</summary>
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| 41 | public static dynamic Parse(string json, Encoding encoding)
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| 42 | {
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| 43 | using (var reader = JsonReaderWriterFactory.CreateJsonReader(encoding.GetBytes(json), XmlDictionaryReaderQuotas.Max))
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| 44 | {
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| 45 | return ToValue(XElement.Load(reader));
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| 46 | }
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| 47 | }
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| 48 |
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| 49 | /// <summary>from JsonSringStream to DynamicJson</summary>
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| 50 | public static dynamic Parse(Stream stream)
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| 51 | {
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| 52 | using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, XmlDictionaryReaderQuotas.Max))
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| 53 | {
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| 54 | return ToValue(XElement.Load(reader));
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| 55 | }
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| 56 | }
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| 57 |
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| 58 | /// <summary>from JsonSringStream to DynamicJson</summary>
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| 59 | public static dynamic Parse(Stream stream, Encoding encoding)
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| 60 | {
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| 61 | using (var reader = JsonReaderWriterFactory.CreateJsonReader(stream, encoding, XmlDictionaryReaderQuotas.Max, _ => { }))
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| 62 | {
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| 63 | return ToValue(XElement.Load(reader));
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| 64 | }
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| 65 | }
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| 66 |
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| 67 | /// <summary>create JsonSring from primitive or IEnumerable or Object({public property name:property value})</summary>
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| 68 | public static string Serialize(object obj)
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| 69 | {
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| 70 | return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(GetJsonType(obj)), CreateJsonNode(obj)));
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| 71 | }
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| 72 |
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| 73 | // private static methods
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| 74 |
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| 75 | private static dynamic ToValue(XElement element)
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| 76 | {
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| 77 | var type = (JsonType)Enum.Parse(typeof(JsonType), element.Attribute("type").Value);
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| 78 | switch (type)
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| 79 | {
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| 80 | case JsonType.boolean:
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| 81 | return (bool)element;
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| 82 | case JsonType.number:
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| 83 | return (double)element;
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| 84 | case JsonType.@string:
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| 85 | return (string)element;
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| 86 | case JsonType.@object:
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| 87 | case JsonType.array:
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| 88 | return new DynamicJson(element, type);
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| 89 | case JsonType.@null:
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| 90 | default:
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| 91 | return null;
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| 92 | }
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| 93 | }
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| 94 |
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| 95 | private static JsonType GetJsonType(object obj)
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| 96 | {
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| 97 | if (obj == null) return JsonType.@null;
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| 98 |
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| 99 | switch (Type.GetTypeCode(obj.GetType()))
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| 100 | {
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| 101 | case TypeCode.Boolean:
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| 102 | return JsonType.boolean;
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| 103 | case TypeCode.String:
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| 104 | case TypeCode.Char:
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| 105 | case TypeCode.DateTime:
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| 106 | return JsonType.@string;
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| 107 | case TypeCode.Int16:
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| 108 | case TypeCode.Int32:
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| 109 | case TypeCode.Int64:
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| 110 | case TypeCode.UInt16:
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| 111 | case TypeCode.UInt32:
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| 112 | case TypeCode.UInt64:
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| 113 | case TypeCode.Single:
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| 114 | case TypeCode.Double:
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| 115 | case TypeCode.Decimal:
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| 116 | case TypeCode.SByte:
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| 117 | case TypeCode.Byte:
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| 118 | return JsonType.number;
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| 119 | case TypeCode.Object:
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| 120 | return (obj is IEnumerable) ? JsonType.array : JsonType.@object;
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| 121 | case TypeCode.DBNull:
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| 122 | case TypeCode.Empty:
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| 123 | default:
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| 124 | return JsonType.@null;
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | private static XAttribute CreateTypeAttr(JsonType type)
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| 129 | {
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| 130 | return new XAttribute("type", type.ToString());
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| 131 | }
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| 132 |
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| 133 | private static object CreateJsonNode(object obj)
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| 134 | {
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| 135 | var type = GetJsonType(obj);
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| 136 | switch (type)
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| 137 | {
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| 138 | case JsonType.@string:
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| 139 | case JsonType.number:
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| 140 | return obj;
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| 141 | case JsonType.boolean:
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| 142 | return obj.ToString().ToLower();
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| 143 | case JsonType.@object:
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| 144 | return CreateXObject(obj);
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| 145 | case JsonType.array:
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| 146 | return CreateXArray(obj as IEnumerable);
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| 147 | case JsonType.@null:
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| 148 | default:
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| 149 | return null;
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| 150 | }
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| 151 | }
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| 152 |
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| 153 | private static IEnumerable<XStreamingElement> CreateXArray<T>(T obj) where T : IEnumerable
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| 154 | {
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| 155 | return obj.Cast<object>()
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| 156 | .Select(o => new XStreamingElement("item", CreateTypeAttr(GetJsonType(o)), CreateJsonNode(o)));
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| 157 | }
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| 158 |
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| 159 | private static IEnumerable<XStreamingElement> CreateXObject(object obj)
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| 160 | {
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| 161 | return obj.GetType()
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| 162 | .GetProperties(BindingFlags.Public | BindingFlags.Instance)
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| 163 | .Select(pi => new { Name = pi.Name, Value = pi.GetValue(obj, null) })
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| 164 | .Select(a => new XStreamingElement(a.Name, CreateTypeAttr(GetJsonType(a.Value)), CreateJsonNode(a.Value)));
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| 165 | }
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| 166 |
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| 167 | private static string CreateJsonString(XStreamingElement element)
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| 168 | {
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| 169 | using (var ms = new MemoryStream())
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| 170 | using (var writer = JsonReaderWriterFactory.CreateJsonWriter(ms, Encoding.Unicode))
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| 171 | {
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| 172 | element.WriteTo(writer);
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| 173 | writer.Flush();
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| 174 | return Encoding.Unicode.GetString(ms.ToArray());
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | // dynamic structure represents JavaScript Object/Array
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| 179 |
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| 180 | readonly XElement xml;
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| 181 | readonly JsonType jsonType;
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| 182 |
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| 183 | /// <summary>create blank JSObject</summary>
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| 184 | public DynamicJson()
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| 185 | {
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| 186 | xml = new XElement("root", CreateTypeAttr(JsonType.@object));
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| 187 | jsonType = JsonType.@object;
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| 188 | }
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| 189 |
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| 190 | private DynamicJson(XElement element, JsonType type)
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| 191 | {
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| 192 | Debug.Assert(type == JsonType.array || type == JsonType.@object);
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| 193 |
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| 194 | xml = element;
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| 195 | jsonType = type;
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| 196 | }
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| 197 |
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| 198 | public bool IsObject { get { return jsonType == JsonType.@object; } }
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| 199 |
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| 200 | public bool IsArray { get { return jsonType == JsonType.array; } }
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| 201 |
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| 202 | /// <summary>has property or not</summary>
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| 203 | public bool IsDefined(string name)
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| 204 | {
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| 205 | return IsObject && (xml.Element(name) != null);
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| 206 | }
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| 207 |
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| 208 | /// <summary>has property or not</summary>
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| 209 | public bool IsDefined(int index)
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| 210 | {
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| 211 | return IsArray && (xml.Elements().ElementAtOrDefault(index) != null);
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| 212 | }
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| 213 |
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| 214 | /// <summary>delete property</summary>
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| 215 | public bool Delete(string name)
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| 216 | {
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| 217 | var elem = xml.Element(name);
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| 218 | if (elem != null)
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| 219 | {
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| 220 | elem.Remove();
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| 221 | return true;
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| 222 | }
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| 223 | else return false;
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| 224 | }
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| 225 |
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| 226 | /// <summary>delete property</summary>
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| 227 | public bool Delete(int index)
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| 228 | {
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| 229 | var elem = xml.Elements().ElementAtOrDefault(index);
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| 230 | if (elem != null)
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| 231 | {
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| 232 | elem.Remove();
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| 233 | return true;
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| 234 | }
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| 235 | else return false;
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| 236 | }
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| 237 |
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| 238 | /// <summary>mapping to Array or Class by Public PropertyName</summary>
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| 239 | public T Deserialize<T>()
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| 240 | {
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| 241 | return (T)Deserialize(typeof(T));
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| 242 | }
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| 243 |
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| 244 | private object Deserialize(Type type)
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| 245 | {
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| 246 | return (IsArray) ? DeserializeArray(type) : DeserializeObject(type);
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| 247 | }
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| 248 |
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| 249 | private dynamic DeserializeValue(XElement element, Type elementType)
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| 250 | {
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| 251 | var value = ToValue(element);
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| 252 | if (value is DynamicJson)
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| 253 | {
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| 254 | value = ((DynamicJson)value).Deserialize(elementType);
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| 255 | }
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| 256 | return Convert.ChangeType(value, elementType);
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| 257 | }
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| 258 |
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| 259 | private object DeserializeObject(Type targetType)
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| 260 | {
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| 261 | var result = Activator.CreateInstance(targetType);
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| 262 | var dict = targetType.GetProperties(BindingFlags.Public | BindingFlags.Instance)
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| 263 | .Where(p => p.CanWrite)
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| 264 | .ToDictionary(pi => pi.Name, pi => pi);
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| 265 | foreach (var item in xml.Elements())
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| 266 | {
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| 267 | PropertyInfo propertyInfo;
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| 268 | if (!dict.TryGetValue(item.Name.LocalName, out propertyInfo)) continue;
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| 269 | var value = DeserializeValue(item, propertyInfo.PropertyType);
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| 270 | propertyInfo.SetValue(result, value, null);
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| 271 | }
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| 272 | return result;
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| 273 | }
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| 274 |
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| 275 | private object DeserializeArray(Type targetType)
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| 276 | {
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| 277 | if (targetType.IsArray) // Foo[]
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| 278 | {
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| 279 | var elemType = targetType.GetElementType();
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| 280 | dynamic array = Array.CreateInstance(elemType, xml.Elements().Count());
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| 281 | var index = 0;
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| 282 | foreach (var item in xml.Elements())
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| 283 | {
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| 284 | array[index++] = DeserializeValue(item, elemType);
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| 285 | }
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| 286 | return array;
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| 287 | }
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| 288 | else // List<Foo>
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| 289 | {
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| 290 | var elemType = targetType.GetGenericArguments()[0];
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| 291 | dynamic list = Activator.CreateInstance(targetType);
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| 292 | foreach (var item in xml.Elements())
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| 293 | {
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| 294 | list.Add(DeserializeValue(item, elemType));
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| 295 | }
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| 296 | return list;
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| 297 | }
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| 298 | }
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| 299 |
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| 300 | // Delete
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| 301 | public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
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| 302 | {
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| 303 | result = (IsArray)
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| 304 | ? Delete((int)args[0])
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| 305 | : Delete((string)args[0]);
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| 306 | return true;
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| 307 | }
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| 308 |
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| 309 | // IsDefined, if has args then TryGetMember
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| 310 | public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
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| 311 | {
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| 312 | if (args.Length > 0)
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| 313 | {
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| 314 | result = null;
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| 315 | return false;
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| 316 | }
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| 317 |
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| 318 | result = IsDefined(binder.Name);
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| 319 | return true;
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| 320 | }
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| 321 |
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| 322 | // Deserialize or foreach(IEnumerable)
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| 323 | public override bool TryConvert(ConvertBinder binder, out object result)
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| 324 | {
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| 325 | if (binder.Type == typeof(IEnumerable) || binder.Type == typeof(object[]))
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| 326 | {
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| 327 | var ie = (IsArray)
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| 328 | ? xml.Elements().Select(x => ToValue(x))
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| 329 | : xml.Elements().Select(x => (dynamic)new KeyValuePair<string, object>(x.Name.LocalName, ToValue(x)));
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| 330 | result = (binder.Type == typeof(object[])) ? ie.ToArray() : ie;
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| 331 | }
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| 332 | else
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| 333 | {
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| 334 | result = Deserialize(binder.Type);
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| 335 | }
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| 336 | return true;
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| 337 | }
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| 338 |
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| 339 | private bool TryGet(XElement element, out object result)
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| 340 | {
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| 341 | if (element == null)
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| 342 | {
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| 343 | result = null;
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| 344 | return false;
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| 345 | }
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| 346 |
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| 347 | result = ToValue(element);
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| 348 | return true;
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| 349 | }
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| 350 |
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| 351 | public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
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| 352 | {
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| 353 | return (IsArray)
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| 354 | ? TryGet(xml.Elements().ElementAtOrDefault((int)indexes[0]), out result)
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| 355 | : TryGet(xml.Element((string)indexes[0]), out result);
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| 356 | }
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| 357 |
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| 358 | public override bool TryGetMember(GetMemberBinder binder, out object result)
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| 359 | {
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| 360 | return (IsArray)
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| 361 | ? TryGet(xml.Elements().ElementAtOrDefault(int.Parse(binder.Name)), out result)
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| 362 | : TryGet(xml.Element(binder.Name), out result);
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| 363 | }
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| 364 |
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| 365 | private bool TrySet(string name, object value)
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| 366 | {
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| 367 | var type = GetJsonType(value);
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| 368 | var element = xml.Element(name);
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| 369 | if (element == null)
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| 370 | {
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| 371 | xml.Add(new XElement(name, CreateTypeAttr(type), CreateJsonNode(value)));
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| 372 | }
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| 373 | else
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| 374 | {
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| 375 | element.Attribute("type").Value = type.ToString();
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| 376 | element.ReplaceNodes(CreateJsonNode(value));
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| 377 | }
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| 378 |
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| 379 | return true;
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| 380 | }
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| 381 |
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| 382 | private bool TrySet(int index, object value)
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| 383 | {
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| 384 | var type = GetJsonType(value);
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| 385 | var e = xml.Elements().ElementAtOrDefault(index);
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| 386 | if (e == null)
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| 387 | {
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| 388 | xml.Add(new XElement("item", CreateTypeAttr(type), CreateJsonNode(value)));
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| 389 | }
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| 390 | else
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| 391 | {
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| 392 | e.Attribute("type").Value = type.ToString();
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| 393 | e.ReplaceNodes(CreateJsonNode(value));
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| 394 | }
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| 395 |
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| 396 | return true;
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| 397 | }
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| 398 |
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| 399 | public override bool TrySetIndex(SetIndexBinder binder, object[] indexes, object value)
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| 400 | {
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| 401 | return (IsArray)
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| 402 | ? TrySet((int)indexes[0], value)
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| 403 | : TrySet((string)indexes[0], value);
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| 404 | }
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| 405 |
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| 406 | public override bool TrySetMember(SetMemberBinder binder, object value)
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| 407 | {
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| 408 | return (IsArray)
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| 409 | ? TrySet(int.Parse(binder.Name), value)
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| 410 | : TrySet(binder.Name, value);
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| 411 | }
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| 412 |
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| 413 | public override IEnumerable<string> GetDynamicMemberNames()
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| 414 | {
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| 415 | return (IsArray)
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| 416 | ? xml.Elements().Select((x, i) => i.ToString())
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| 417 | : xml.Elements().Select(x => x.Name.LocalName);
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| 418 | }
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| 419 |
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| 420 | /// <summary>Serialize to JsonString</summary>
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| 421 | public override string ToString()
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| 422 | {
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| 423 | // <foo type="null"></foo> is can't serialize. replace to <foo type="null" />
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| 424 | foreach (var elem in xml.Descendants().Where(x => x.Attribute("type").Value == "null"))
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| 425 | {
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| 426 | elem.RemoveNodes();
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| 427 | }
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| 428 | return CreateJsonString(new XStreamingElement("root", CreateTypeAttr(jsonType), xml.Elements()));
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| 429 | }
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| 430 | }
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| 431 | }
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