@joebigelow / wix-1
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1 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
2
3 namespace WixToolset.Data.WindowsInstaller
4 {
5 using System;
6 using System.Diagnostics;
7 using System.Globalization;
8 using System.Xml;
9
10 /// <summary>
11 /// Field containing data for an object column in a row.
12 /// </summary>
13 public sealed class ObjectField : Field
14 {
15 /// <summary>
16 /// Instantiates a new Field.
17 /// </summary>
18 /// <param name="columnDefinition">Column definition for this field.</param>
19 internal ObjectField(ColumnDefinition columnDefinition) :
20 base(columnDefinition)
21 {
22 }
23
24 /// <summary>
25 /// Gets or sets the index of the embedded file in a library.
26 /// </summary>
27 /// <value>The index of the embedded file.</value>
28 public int? EmbeddedFileIndex { get; set; }
29
30 /// <summary>
31 /// Gets or sets the previous index of the embedded file in the library.
32 /// </summary>
33 /// <value>The previous index of the embedded file.</value>
34 public int? PreviousEmbeddedFileIndex { get; set; }
35
36 /// <summary>
37 /// Gets or sets the path to the embedded cabinet of the previous file.
38 /// </summary>
39 /// <value>The path of the cabinet containing the previous file.</value>
40 public Uri PreviousBaseUri { get; set; }
41
42 /// <summary>
43 /// Gets the base URI of the object field.
44 /// </summary>
45 /// <value>The base URI of the object field.</value>
46 public Uri BaseUri { get; private set; }
47
48 /// <summary>
49 /// Gets or sets the unresolved data for this field.
50 /// </summary>
51 /// <value>Unresolved Data in the field.</value>
52 public string UnresolvedData { get; set; }
53
54 /// <summary>
55 /// Gets or sets the unresolved previous data.
56 /// </summary>
57 /// <value>The unresolved previous data.</value>
58 public string UnresolvedPreviousData { get; set; }
59
60 /// <summary>
61 /// Parse a field from the xml.
62 /// </summary>
63 /// <param name="reader">XmlReader where the intermediate is persisted.</param>
64 internal override void Read(XmlReader reader)
65 {
66 Debug.Assert("field" == reader.LocalName);
67
68 bool empty = reader.IsEmptyElement;
69
70 this.BaseUri = new Uri(reader.BaseURI);
71
72 while (reader.MoveToNextAttribute())
73 {
74 switch (reader.LocalName)
75 {
76 case "cabinetFileId":
77 this.EmbeddedFileIndex = Convert.ToInt32(reader.Value);
78 break;
79 case "modified":
80 this.Modified = reader.Value.Equals("yes");
81 break;
82 case "previousData":
83 this.PreviousData = reader.Value;
84 break;
85 case "unresolvedPreviousData":
86 this.UnresolvedPreviousData = reader.Value;
87 break;
88 case "unresolvedData":
89 this.UnresolvedData = reader.Value;
90 break;
91 case "previousCabinetFileId":
92 this.PreviousEmbeddedFileIndex = Convert.ToInt32(reader.Value);
93 break;
94 }
95 }
96
97 if (!empty)
98 {
99 bool done = false;
100
101 while (!done && reader.Read())
102 {
103 switch (reader.NodeType)
104 {
105 case XmlNodeType.Element:
106 throw new XmlException();
107 case XmlNodeType.CDATA:
108 case XmlNodeType.Text:
109 if (0 < reader.Value.Length)
110 {
111 this.Data = reader.Value;
112 }
113 break;
114 case XmlNodeType.EndElement:
115 done = true;
116 break;
117 }
118 }
119
120 if (!done)
121 {
122 throw new XmlException();
123 }
124 }
125 }
126
127 /// <summary>
128 /// Persists a field in an XML format.
129 /// </summary>
130 /// <param name="writer">XmlWriter where the Field should persist itself as XML.</param>
131 internal override void Write(XmlWriter writer)
132 {
133 writer.WriteStartElement("field", WindowsInstallerData.XmlNamespaceUri);
134
135 if (this.EmbeddedFileIndex.HasValue)
136 {
137 writer.WriteStartAttribute("cabinetFileId");
138 writer.WriteValue(this.EmbeddedFileIndex);
139 writer.WriteEndAttribute();
140 }
141
142 if (this.Modified)
143 {
144 writer.WriteAttributeString("modified", "yes");
145 }
146
147 if (null != this.UnresolvedPreviousData)
148 {
149 writer.WriteAttributeString("unresolvedPreviousData", this.UnresolvedPreviousData);
150 }
151
152 if (null != this.PreviousData)
153 {
154 writer.WriteAttributeString("previousData", this.PreviousData);
155 }
156
157 if (null != this.UnresolvedData)
158 {
159 writer.WriteAttributeString("unresolvedData", this.UnresolvedData);
160 }
161
162 if (this.PreviousEmbeddedFileIndex.HasValue)
163 {
164 writer.WriteStartAttribute("previousCabinetFileId");
165 writer.WriteValue(this.PreviousEmbeddedFileIndex);
166 writer.WriteEndAttribute();
167 }
168
169 // Convert the data to a string that will persist nicely (nulls as String.Empty).
170 string text = Convert.ToString(this.Data, CultureInfo.InvariantCulture);
171 if (this.Column.UseCData)
172 {
173 writer.WriteCData(text);
174 }
175 else
176 {
177 writer.WriteString(text);
178 }
179
180 writer.WriteEndElement();
181 }
182 }
183 }