wasSharp – Blame information for rev 19

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2 zed 1 ///////////////////////////////////////////////////////////////////////////
2 // Copyright (C) Wizardry and Steamworks 2013 - License: GNU GPLv3 //
3 // Please see: http://www.gnu.org/licenses/gpl.html for legal details, //
4 // rights of fair usage, the disclaimer and warranty conditions. //
5 ///////////////////////////////////////////////////////////////////////////
6  
7 using System;
8 using System.Collections.Generic;
9 using System.Linq;
10 using System.Reflection;
11  
12 namespace wasSharp
13 {
7 office 14 public static class Reflection
2 zed 15 {
16 ///////////////////////////////////////////////////////////////////////////
17 // Copyright (C) 2014 Wizardry and Steamworks - License: GNU GPLv3 //
18 ///////////////////////////////////////////////////////////////////////////
19 /// <summary>
20 /// Retrieves an attribute of type T from an enumeration.
21 /// </summary>
22 /// <returns>an attribute of type T</returns>
5 eva 23 public static T GetAttributeFromEnumValue<T>(Enum value) where T : Attribute
2 zed 24 {
3 eva 25 return (T) value.GetType()
2 zed 26 .GetRuntimeField(value.ToString())
10 office 27 .GetCustomAttributes(typeof(T), false)
2 zed 28 .SingleOrDefault();
29 }
30  
31 ///////////////////////////////////////////////////////////////////////////
32 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
33 ///////////////////////////////////////////////////////////////////////////
34 /// <summary>
35 /// Returns all the attributes of type T of an enumeration.
36 /// </summary>
37 /// <typeparam name="T">the attribute to retrieve</typeparam>
38 /// <returns>a list of attributes</returns>
5 eva 39 public static IEnumerable<T> GetEnumAttributes<T>(Enum e) where T : Attribute
2 zed 40 {
7 office 41 return e.GetType().GetRuntimeFields().ToArray()
3 eva 42 .AsParallel()
5 eva 43 .Select(o => GetAttributeFromEnumValue<T>((Enum) o.GetValue(Activator.CreateInstance<T>())));
2 zed 44 }
45  
46 ///////////////////////////////////////////////////////////////////////////
47 // Copyright (C) 2014 Wizardry and Steamworks - License: GNU GPLv3 //
48 ///////////////////////////////////////////////////////////////////////////
49 /// <summary>
50 /// Returns all the field names of an enumeration.
51 /// </summary>
52 /// <returns>the field names</returns>
5 eva 53 public static IEnumerable<string> GetEnumNames<T>()
2 zed 54 {
55 return
10 office 56 typeof(T).GetRuntimeFields().ToArray()
2 zed 57 .AsParallel()
10 office 58 .Select(o => o.GetCustomAttribute(typeof(NameAttribute), false))
2 zed 59 .Select(o => (o as NameAttribute)?.Name)
60 .Where(o => !string.IsNullOrEmpty(o))
61 .Select(o => o);
62 }
63  
64 ///////////////////////////////////////////////////////////////////////////
65 // Copyright (C) 2014 Wizardry and Steamworks - License: GNU GPLv3 //
66 ///////////////////////////////////////////////////////////////////////////
67 /// <summary>
68 /// Returns all the values of an enumeration.
69 /// </summary>
70 /// <returns>the values of the enumeration</returns>
5 eva 71 public static IEnumerable<T> GetEnumValues<T>()
2 zed 72 {
10 office 73 return Enum.GetValues(typeof(T)).Cast<object>().Select(value => (T) value);
2 zed 74 }
75  
76 ///////////////////////////////////////////////////////////////////////////
77 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
78 ///////////////////////////////////////////////////////////////////////////
79 /// <summary>
7 office 80 /// Get the name from an enumeration value.
2 zed 81 /// </summary>
82 /// <param name="value">an enumeration value</param>
83 /// <returns>the description or the empty string</returns>
5 eva 84 public static string GetNameFromEnumValue(Enum value)
2 zed 85 {
7 office 86 var attribute = value.GetType()
2 zed 87 .GetRuntimeField(value.ToString())
10 office 88 .GetCustomAttributes(typeof(NameAttribute), false)
2 zed 89 .SingleOrDefault() as NameAttribute;
90 return attribute?.Name;
91 }
92  
93 ///////////////////////////////////////////////////////////////////////////
94 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
95 ///////////////////////////////////////////////////////////////////////////
96 /// <summary>
97 /// Get the description from an enumeration value.
98 /// </summary>
99 /// <param name="value">an enumeration value</param>
100 /// <returns>the description or the empty string</returns>
5 eva 101 public static string GetDescriptionFromEnumValue(Enum value)
2 zed 102 {
7 office 103 var attribute = value.GetType()
2 zed 104 .GetRuntimeField(value.ToString())
10 office 105 .GetCustomAttributes(typeof(DescriptionAttribute), false)
2 zed 106 .SingleOrDefault() as DescriptionAttribute;
107 return attribute?.Description;
108 }
109  
110 ///////////////////////////////////////////////////////////////////////////
111 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
112 ///////////////////////////////////////////////////////////////////////////
113 /// <summary>
114 /// Get enumeration value from its name attribute.
115 /// </summary>
116 /// <typeparam name="T">the enumeration type</typeparam>
117 /// <param name="name">the description of a member</param>
118 /// <returns>the value or the default of T if case no name attribute found</returns>
5 eva 119 public static T GetEnumValueFromName<T>(string name)
2 zed 120 {
10 office 121 var field = typeof(T).GetRuntimeFields().ToArray()
2 zed 122 .AsParallel().SelectMany(f => f.GetCustomAttributes(
10 office 123 typeof(NameAttribute), false), (
124 f, a) => new {Field = f, Att = a})
125 .SingleOrDefault(a => Strings.StringEquals(((NameAttribute) a.Att)
126 .Name, name, StringComparison.Ordinal));
3 eva 127 return field != null ? (T) field.Field.GetValue(Activator.CreateInstance<T>()) : default(T);
2 zed 128 }
129  
130 ///////////////////////////////////////////////////////////////////////////
131 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
132 ///////////////////////////////////////////////////////////////////////////
133 /// <summary>
7 office 134 /// Get the name of a structure member.
2 zed 135 /// </summary>
136 /// <typeparam name="T">the type of the structure to search</typeparam>
137 /// <param name="structure">the structure to search</param>
138 /// <param name="item">the value of the item to search</param>
139 /// <returns>the description or the empty string</returns>
5 eva 140 public static string GetStructureMemberName<T>(T structure, object item) where T : struct
2 zed 141 {
10 office 142 var field = typeof(T).GetRuntimeFields().ToArray()
143 .AsParallel().SelectMany(f => f.GetCustomAttributes(typeof(NameAttribute), false),
3 eva 144 (f, a) => new {Field = f, Att = a}).SingleOrDefault(f => f.Field.GetValue(structure).Equals(item));
145 return field != null ? ((NameAttribute) field.Att).Name : string.Empty;
2 zed 146 }
3 eva 147  
7 office 148 ///////////////////////////////////////////////////////////////////////////
149 // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 //
150 ///////////////////////////////////////////////////////////////////////////
3 eva 151 /// <summary>
7 office 152 /// Get field or property from a class by supplying a path.
153 /// </summary>
154 /// <typeparam name="T">the type of the object</typeparam>
155 /// <param name="o">the object</param>
156 /// <param name="path">the fully qualified path to the field of property</param>
157 /// <returns>
158 /// the last object in the fully qualified path or null in case the field or property could not be found
159 /// </returns>
160 public static object GetFP<T>(this T o, string path)
161 {
162 if (string.IsNullOrEmpty(path)) return null;
163 if (o == null) return null;
164  
165 var memberType = o.GetType();
166 var components = path.Split('.');
167  
168 var f = memberType.GetRuntimeField(components[0]);
169 var p = memberType.GetRuntimeProperty(components[0]);
170  
171 if (f != null)
172 return components.Length > 1
173 ? GetFP(f.GetValue(o),
174 components.Skip(1).Aggregate((a, i) => a + @"." + i))
175 : memberType.GetRuntimeField(path).GetValue(o);
176  
177 if (p != null)
178 return components.Length > 1
179 ? GetFP(p.GetValue(o),
180 components.Skip(1).Aggregate((a, i) => a + @"." + i))
181 : memberType.GetRuntimeProperty(path).GetValue(o);
182  
183 return null;
184 }
185  
186 ///////////////////////////////////////////////////////////////////////////
187 // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 //
188 ///////////////////////////////////////////////////////////////////////////
189 /// <summary>
190 /// Get field or property info from a class by supplying a path.
191 /// </summary>
192 /// <typeparam name="T">the type of the object</typeparam>
193 /// <param name="o">the object</param>
194 /// <param name="path">the fully qualified path to the field of property</param>
195 /// <returns>
196 /// the field or property info of the last object in the path or null if the object cannot be found
197 /// </returns>
198 public static object GetFPInfo<T>(this T o, string path)
199 {
200 if (string.IsNullOrEmpty(path)) return null;
201 if (o == null) return null;
202  
203 var memberType = o.GetType();
204 var components = path.Split('.');
205  
206 var f = memberType.GetRuntimeField(components[0]);
207 var p = memberType.GetRuntimeProperty(components[0]);
208  
209 if (f != null)
210 return components.Length > 1
211 ? GetFPInfo(f.GetValue(o),
212 components.Skip(1).Aggregate((a, i) => a + @"." + i))
213 : memberType.GetRuntimeField(path);
214  
215 if (p != null)
216 return components.Length > 1
217 ? GetFPInfo(p.GetValue(o),
218 components.Skip(1).Aggregate((a, i) => a + @"." + i))
219 : memberType.GetRuntimeProperty(path);
220  
221 return null;
222 }
223  
224 ///////////////////////////////////////////////////////////////////////////
225 // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 //
226 ///////////////////////////////////////////////////////////////////////////
19 office 227 /// <summary>Return all the run-time properties for an object.</summary>
228 /// <param name="o">the object whose properties to return</param>
229 /// <returns>the property information for all the properties of the object</returns>
230 public static IEnumerable<PropertyInfo> GetPropertiesInfo<T>(this T o)
231 {
232 foreach (var p in o.GetType().GetRuntimeProperties())
233 yield return p;
234 }
235  
236 ///////////////////////////////////////////////////////////////////////////
237 // Copyright (C) 2016 Wizardry and Steamworks - License: GNU GPLv3 //
238 ///////////////////////////////////////////////////////////////////////////
7 office 239 /// <summary>
240 /// Enumerate all the base types recursively starting from a type.
241 /// </summary>
242 /// <param name="type">the type</param>
243 /// <returns>an enumeration of all base types</returns>
244 public static IEnumerable<Type> GetBaseTypes(this Type type)
245 {
246 var baseType = type.GetTypeInfo().BaseType;
10 office 247 if (baseType == null)
7 office 248 yield break;
249 yield return baseType;
250 foreach (var t in GetBaseTypes(baseType))
251 {
252 yield return t;
253 }
254 }
255  
256 /// <summary>
3 eva 257 /// A generic name attribute.
258 /// </summary>
259 public class NameAttribute : Attribute
260 {
261 protected readonly string name;
262  
263 public NameAttribute(string name)
264 {
265 this.name = name;
266 }
267  
268 public string Name => name;
269 }
270  
271 /// <summary>
272 /// A generic description attribute.
273 /// </summary>
274 public class DescriptionAttribute : Attribute
275 {
276 protected readonly string description;
277  
278 public DescriptionAttribute(string description)
279 {
280 this.description = description;
281 }
282  
283 public string Description => description;
284 }
2 zed 285 }
3 eva 286 }