wasSharp – Blame information for rev 5

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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 {
14 public class Reflection
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())
3 eva 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 {
41 return e.GetType().GetRuntimeFields()
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
56 typeof (T).GetRuntimeFields()
57 .AsParallel()
58 .Select(o => o.GetCustomAttribute(typeof (NameAttribute), false))
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 {
73 return Enum.GetValues(typeof (T)).Cast<object>().Select(value => (T) value);
74 }
75  
76 ///////////////////////////////////////////////////////////////////////////
77 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
78 ///////////////////////////////////////////////////////////////////////////
79 /// <summary>
80 /// Get the description from an enumeration value.
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 {
86 NameAttribute attribute = value.GetType()
87 .GetRuntimeField(value.ToString())
3 eva 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 {
103 DescriptionAttribute attribute = value.GetType()
104 .GetRuntimeField(value.ToString())
3 eva 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 {
3 eva 121 var field = typeof (T).GetRuntimeFields()
2 zed 122 .AsParallel().SelectMany(f => f.GetCustomAttributes(
3 eva 123 typeof (NameAttribute), false), (
124 f, a) => new {Field = f, Att = a}).SingleOrDefault(a => ((NameAttribute) a.Att)
125 .Name.Equals(name));
126 return field != null ? (T) field.Field.GetValue(Activator.CreateInstance<T>()) : default(T);
2 zed 127 }
128  
129 ///////////////////////////////////////////////////////////////////////////
130 // Copyright (C) 2015 Wizardry and Steamworks - License: GNU GPLv3 //
131 ///////////////////////////////////////////////////////////////////////////
132 /// <summary>
133 /// Get the description of structure member.
134 /// </summary>
135 /// <typeparam name="T">the type of the structure to search</typeparam>
136 /// <param name="structure">the structure to search</param>
137 /// <param name="item">the value of the item to search</param>
138 /// <returns>the description or the empty string</returns>
5 eva 139 public static string GetStructureMemberName<T>(T structure, object item) where T : struct
2 zed 140 {
3 eva 141 var field = typeof (T).GetRuntimeFields()
142 .AsParallel().SelectMany(f => f.GetCustomAttributes(typeof (NameAttribute), false),
143 (f, a) => new {Field = f, Att = a}).SingleOrDefault(f => f.Field.GetValue(structure).Equals(item));
144 return field != null ? ((NameAttribute) field.Att).Name : string.Empty;
2 zed 145 }
3 eva 146  
147 /// <summary>
148 /// A generic name attribute.
149 /// </summary>
150 public class NameAttribute : Attribute
151 {
152 protected readonly string name;
153  
154 public NameAttribute(string name)
155 {
156 this.name = name;
157 }
158  
159 public string Name => name;
160 }
161  
162 /// <summary>
163 /// A generic description attribute.
164 /// </summary>
165 public class DescriptionAttribute : Attribute
166 {
167 protected readonly string description;
168  
169 public DescriptionAttribute(string description)
170 {
171 this.description = description;
172 }
173  
174 public string Description => description;
175 }
2 zed 176 }
3 eva 177 }