File: ExpandoObjectConverter.cs

package info (click to toggle)
mono 4.6.2.7+dfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 778,148 kB
  • ctags: 914,052
  • sloc: cs: 5,779,509; xml: 2,773,713; ansic: 432,645; sh: 14,749; makefile: 12,361; perl: 2,488; python: 1,434; cpp: 849; asm: 531; sql: 95; sed: 16; php: 1
file content (140 lines) | stat: -rw-r--r-- 4,013 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
#if !(NET35 || NET20 || WINDOWS_PHONE)

using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Globalization;
using System.Linq;
using System.Text;
using Newtonsoft.Json.Utilities;

namespace Newtonsoft.Json.Converters
{
  /// <summary>
  /// Converts an ExpandoObject to and from JSON.
  /// </summary>
  public class ExpandoObjectConverter : JsonConverter
  {
    /// <summary>
    /// Writes the JSON representation of the object.
    /// </summary>
    /// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
    /// <param name="value">The value.</param>
    /// <param name="serializer">The calling serializer.</param>
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
      // can write is set to false
    }

    /// <summary>
    /// Reads the JSON representation of the object.
    /// </summary>
    /// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
    /// <param name="objectType">Type of the object.</param>
    /// <param name="existingValue">The existing value of object being read.</param>
    /// <param name="serializer">The calling serializer.</param>
    /// <returns>The object value.</returns>
    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
      return ReadValue(reader);
    }

    private object ReadValue(JsonReader reader)
    {
      while (reader.TokenType == JsonToken.Comment)
      {
        if (!reader.Read())
          throw new Exception("Unexpected end.");
      }

      switch (reader.TokenType)
      {
        case JsonToken.StartObject:
          return ReadObject(reader);
        case JsonToken.StartArray:
          return ReadList(reader);
        default:
          if (JsonReader.IsPrimitiveToken(reader.TokenType))
            return reader.Value;

          throw new Exception("Unexpected token when converting ExpandoObject: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
      }
    }

    private object ReadList(JsonReader reader)
    {
      IList<object> list = new List<object>();

      while (reader.Read())
      {
        switch (reader.TokenType)
        {
          case JsonToken.Comment:
            break;
          default:
            object v = ReadValue(reader);

            list.Add(v);
            break;
          case JsonToken.EndArray:
            return list;
        }
      }

      throw new Exception("Unexpected end.");
    }

    private object ReadObject(JsonReader reader)
    {
      IDictionary<string, object> expandoObject = new ExpandoObject();

      while (reader.Read())
      {
        switch (reader.TokenType)
        {
          case JsonToken.PropertyName:
            string propertyName = reader.Value.ToString();

            if (!reader.Read())
              throw new Exception("Unexpected end.");

            object v = ReadValue(reader);

            expandoObject[propertyName] = v;
            break;
          case JsonToken.Comment:
            break;
          case JsonToken.EndObject:
            return expandoObject;
        }
      }

      throw new Exception("Unexpected end.");
    }

    /// <summary>
    /// Determines whether this instance can convert the specified object type.
    /// </summary>
    /// <param name="objectType">Type of the object.</param>
    /// <returns>
    /// 	<c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>.
    /// </returns>
    public override bool CanConvert(Type objectType)
    {
      return (objectType == typeof (ExpandoObject));
    }

    /// <summary>
    /// Gets a value indicating whether this <see cref="JsonConverter"/> can write JSON.
    /// </summary>
    /// <value>
    /// 	<c>true</c> if this <see cref="JsonConverter"/> can write JSON; otherwise, <c>false</c>.
    /// </value>
    public override bool CanWrite
    {
      get { return false; }
    }
  }
}

#endif