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
|
//-----------------------------------------------------------------------
// <copyright file="DictionaryXmlReader.cs" company="Andrew Arnott">
// Copyright (c) Andrew Arnott. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOAuth.Messaging {
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Xml;
using System.Xml.Linq;
/// <summary>
/// An XmlReader-looking object that actually reads from a dictionary.
/// </summary>
internal class DictionaryXmlReader {
/// <summary>
/// Creates an XmlReader that reads data out of a dictionary instead of XML.
/// </summary>
/// <param name="rootElement">The name of the root XML element.</param>
/// <param name="fieldSorter">The field sorter so that the XmlReader generates xml elements in the order required by the <see cref="DataContractSerializer"/>.</param>
/// <param name="fields">The dictionary to read data from.</param>
/// <returns>The XmlReader that will read the data out of the given dictionary.</returns>
internal static XmlReader Create(XName rootElement, IComparer<string> fieldSorter, IDictionary<string, string> fields) {
if (rootElement == null) {
throw new ArgumentNullException("rootElement");
}
if (fieldSorter == null) {
throw new ArgumentNullException("fieldSorter");
}
if (fields == null) {
throw new ArgumentNullException("fields");
}
return CreateRoundtripReader(rootElement, fieldSorter, fields);
}
/// <summary>
/// Creates an <see cref="XmlReader"/> that will read values out of a dictionary.
/// </summary>
/// <param name="rootElement">The surrounding root XML element to generate.</param>
/// <param name="fieldSorter">The field sorter so that the XmlReader generates xml elements in the order required by the <see cref="DataContractSerializer"/>.</param>
/// <param name="fields">The dictionary to list values from.</param>
/// <returns>The generated <see cref="XmlReader"/>.</returns>
private static XmlReader CreateRoundtripReader(XName rootElement, IComparer<string> fieldSorter, IDictionary<string, string> fields) {
Debug.Assert(rootElement != null, "rootElement == null");
Debug.Assert(fieldSorter != null, "fieldSorter == null");
Debug.Assert(fields != null, "fields == null");
MemoryStream stream = new MemoryStream();
XmlWriter writer = XmlWriter.Create(stream);
SerializeDictionaryToXml(writer, rootElement, fieldSorter, fields);
writer.Flush();
stream.Seek(0, SeekOrigin.Begin);
// For debugging purposes.
StreamReader sr = new StreamReader(stream);
Trace.WriteLine(sr.ReadToEnd());
stream.Seek(0, SeekOrigin.Begin);
return XmlReader.Create(stream);
}
/// <summary>
/// Writes out the values in a dictionary as XML.
/// </summary>
/// <param name="writer">The <see cref="XmlWriter"/> to write out the XML to.</param>
/// <param name="rootElement">The name of the root element to use to surround the dictionary values.</param>
/// <param name="fieldSorter">The field sorter so that the XmlReader generates xml elements in the order required by the <see cref="DataContractSerializer"/>.</param>
/// <param name="fields">The dictionary with values to serialize.</param>
private static void SerializeDictionaryToXml(XmlWriter writer, XName rootElement, IComparer<string> fieldSorter, IDictionary<string, string> fields) {
Debug.Assert(writer != null, "writer == null");
Debug.Assert(rootElement != null, "rootElement == null");
Debug.Assert(fields != null, "fields == null");
writer.WriteStartElement(rootElement.LocalName, rootElement.NamespaceName);
foreach (var pair in fields.OrderBy(pair => pair.Key, fieldSorter)) {
writer.WriteStartElement(pair.Key, rootElement.NamespaceName);
writer.WriteValue(pair.Value);
writer.WriteEndElement();
}
writer.WriteEndElement();
}
}
}
|
