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path: root/src/WixToolset.Data/Serialize/CodeDomReader.cs
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diff --git a/src/WixToolset.Data/Serialize/CodeDomReader.cs b/src/WixToolset.Data/Serialize/CodeDomReader.cs
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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
3namespace WixToolset.Data.Serialize
4{
5 using System;
6 using System.Diagnostics.CodeAnalysis;
7 using System.Globalization;
8 using System.Reflection;
9 using System.Xml;
10
11 /// <summary>
12 /// Class used for reading XML files in to the CodeDom.
13 /// </summary>
14 public class CodeDomReader
15 {
16 private Assembly[] assemblies;
17
18 /// <summary>
19 /// Creates a new CodeDomReader, using the current assembly.
20 /// </summary>
21 public CodeDomReader()
22 {
23 this.assemblies = new Assembly[] { Assembly.GetExecutingAssembly() };
24 }
25
26 /// <summary>
27 /// Creates a new CodeDomReader, and takes in a list of assemblies in which to
28 /// look for elements.
29 /// </summary>
30 /// <param name="assemblies">Assemblies in which to look for types that correspond
31 /// to elements.</param>
32 public CodeDomReader(Assembly[] assemblies)
33 {
34 this.assemblies = assemblies;
35 }
36
37 /// <summary>
38 /// Loads an XML file into a strongly-typed code dom.
39 /// </summary>
40 /// <param name="filePath">File to load into the code dom.</param>
41 /// <returns>The strongly-typed object at the root of the tree.</returns>
42 [SuppressMessage("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters", MessageId = "System.InvalidOperationException.#ctor(System.String)")]
43 public ISchemaElement Load(string filePath)
44 {
45 XmlDocument document = new XmlDocument();
46 document.Load(filePath);
47 ISchemaElement schemaElement = null;
48
49 foreach (XmlNode node in document.ChildNodes)
50 {
51 XmlElement element = node as XmlElement;
52 if (element != null)
53 {
54 if (schemaElement != null)
55 {
56 throw new InvalidOperationException(WixDataStrings.EXP_MultipleRootElementsFoundInFile);
57 }
58
59 schemaElement = this.CreateObjectFromElement(element);
60 this.ParseObjectFromElement(schemaElement, element);
61 }
62 }
63 return schemaElement;
64 }
65
66 /// <summary>
67 /// Sets an attribute on an ISchemaElement.
68 /// </summary>
69 /// <param name="schemaElement">Schema element to set attribute on.</param>
70 /// <param name="name">Name of the attribute to set.</param>
71 /// <param name="value">Value to set on the attribute.</param>
72 [SuppressMessage("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters", MessageId = "System.InvalidOperationException.#ctor(System.String)")]
73 private static void SetAttributeOnObject(ISchemaElement schemaElement, string name, string value)
74 {
75 ISetAttributes setAttributes = schemaElement as ISetAttributes;
76 if (setAttributes == null)
77 {
78 throw new InvalidOperationException(String.Format(CultureInfo.CurrentUICulture, WixDataStrings.EXP_ISchemaElementDoesnotImplementISetAttribute, schemaElement.GetType().FullName));
79 }
80 else
81 {
82 setAttributes.SetAttribute(name, value);
83 }
84 }
85
86 /// <summary>
87 /// Parses an ISchemaElement from the XmlElement.
88 /// </summary>
89 /// <param name="schemaElement">ISchemaElement to fill in.</param>
90 /// <param name="element">XmlElement to parse from.</param>
91 [SuppressMessage("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters", MessageId = "System.InvalidOperationException.#ctor(System.String)")]
92 private void ParseObjectFromElement(ISchemaElement schemaElement, XmlElement element)
93 {
94 foreach (XmlAttribute attribute in element.Attributes)
95 {
96 SetAttributeOnObject(schemaElement, attribute.LocalName, attribute.Value);
97 }
98
99 foreach (XmlNode node in element.ChildNodes)
100 {
101 XmlElement childElement = node as XmlElement;
102 if (childElement != null)
103 {
104 ISchemaElement childSchemaElement = null;
105 ICreateChildren createChildren = schemaElement as ICreateChildren;
106 if (createChildren == null)
107 {
108 throw new InvalidOperationException(String.Format(CultureInfo.CurrentUICulture, WixDataStrings.EXP_ISchemaElementDoesnotImplementICreateChildren, element.LocalName));
109 }
110 else
111 {
112 childSchemaElement = createChildren.CreateChild(childElement.LocalName);
113 }
114
115 if (childSchemaElement == null)
116 {
117 childSchemaElement = this.CreateObjectFromElement(childElement);
118 if (childSchemaElement == null)
119 {
120 throw new InvalidOperationException(String.Format(CultureInfo.CurrentUICulture, WixDataStrings.EXP_XmlElementDoesnotHaveISchemaElement, childElement.LocalName));
121 }
122 }
123
124 this.ParseObjectFromElement(childSchemaElement, childElement);
125 IParentElement parentElement = (IParentElement)schemaElement;
126 parentElement.AddChild(childSchemaElement);
127 }
128 else
129 {
130 XmlText childText = node as XmlText;
131 if (childText != null)
132 {
133 SetAttributeOnObject(schemaElement, "Content", childText.Value);
134 }
135 }
136 }
137 }
138
139 /// <summary>
140 /// Creates an object from an XML element by digging through the assembly list.
141 /// </summary>
142 /// <param name="element">XML Element to create an ISchemaElement from.</param>
143 /// <returns>A constructed ISchemaElement.</returns>
144 private ISchemaElement CreateObjectFromElement(XmlElement element)
145 {
146 ISchemaElement schemaElement = null;
147 foreach (Assembly assembly in this.assemblies)
148 {
149 foreach (Type type in assembly.GetTypes())
150 {
151 if (type.FullName.EndsWith(element.LocalName, StringComparison.Ordinal)
152 && typeof(ISchemaElement).IsAssignableFrom(type))
153 {
154 schemaElement = (ISchemaElement)Activator.CreateInstance(type);
155 }
156 }
157 }
158 return schemaElement;
159 }
160 }
161}
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