1 //
2 // System.Reflection/CustomAttributeData.cs
3 //
4 // Author:
5 //   Zoltan Varga (vargaz@gmail.com)
6 //   Carlos Alberto Cortez (calberto.cortez@gmail.com)
7 //
8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
9 //
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
17 //
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
20 //
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 //
29 
30 using System;
31 using System.Collections.Generic;
32 using System.Runtime.CompilerServices;
33 using System.Runtime.InteropServices;
34 using System.Text;
35 
36 namespace System.Reflection {
37 
38 	[ComVisible (true)]
39 	[Serializable]
40 	public
41 	class CustomAttributeData {
42 		class LazyCAttrData {
43 			internal Assembly assembly;
44 			internal IntPtr data;
45 			internal uint data_length;
46 		}
47 
48 		ConstructorInfo ctorInfo;
49 		IList<CustomAttributeTypedArgument> ctorArgs;
50 		IList<CustomAttributeNamedArgument> namedArgs;
51 		LazyCAttrData lazyData;
52 
53 
CustomAttributeData()54 		protected CustomAttributeData ()
55 		{
56 		}
57 
CustomAttributeData(ConstructorInfo ctorInfo, Assembly assembly, IntPtr data, uint data_length)58 		internal CustomAttributeData (ConstructorInfo ctorInfo, Assembly assembly, IntPtr data, uint data_length)
59 		{
60 			this.ctorInfo = ctorInfo;
61 			this.lazyData = new LazyCAttrData ();
62 			this.lazyData.assembly = assembly;
63 			this.lazyData.data = data;
64 			this.lazyData.data_length = data_length;
65 		}
66 
67 		[MethodImplAttribute (MethodImplOptions.InternalCall)]
ResolveArgumentsInternal(ConstructorInfo ctor, Assembly assembly, IntPtr data, uint data_length, out object[] ctorArgs, out object[] namedArgs)68 		static extern void ResolveArgumentsInternal (ConstructorInfo ctor, Assembly assembly, IntPtr data, uint data_length, out object[] ctorArgs, out object[] namedArgs);
69 
ResolveArguments()70 		void ResolveArguments ()
71 		{
72 			object[] ctor_args, named_args;
73 			if (lazyData == null)
74 				return;
75 
76 			ResolveArgumentsInternal (ctorInfo, lazyData.assembly, lazyData.data, lazyData.data_length, out ctor_args, out named_args);
77 
78 			this.ctorArgs = Array.AsReadOnly<CustomAttributeTypedArgument>
79 				(ctor_args != null ? UnboxValues<CustomAttributeTypedArgument> (ctor_args) : EmptyArray<CustomAttributeTypedArgument>.Value);
80 			this.namedArgs = Array.AsReadOnly<CustomAttributeNamedArgument>
81 				(named_args != null ? UnboxValues<CustomAttributeNamedArgument> (named_args) : EmptyArray<CustomAttributeNamedArgument>.Value);
82 
83 			lazyData = null;
84 		}
85 
86 		[ComVisible (true)]
87 		public
88 		virtual
89 		ConstructorInfo Constructor {
90 			get {
91 				return ctorInfo;
92 			}
93 		}
94 
95 		[ComVisible (true)]
96 		public
97 		virtual
98 		IList<CustomAttributeTypedArgument> ConstructorArguments {
99 			get {
100 				ResolveArguments ();
101 				return ctorArgs;
102 			}
103 		}
104 
105 		public
106 		virtual
107 		IList<CustomAttributeNamedArgument> NamedArguments {
108 			get {
109 				ResolveArguments ();
110 				return namedArgs;
111 			}
112 		}
113 
GetCustomAttributes(Assembly target)114 		public static IList<CustomAttributeData> GetCustomAttributes (Assembly target) {
115 			return MonoCustomAttrs.GetCustomAttributesData (target);
116 		}
117 
GetCustomAttributes(MemberInfo target)118 		public static IList<CustomAttributeData> GetCustomAttributes (MemberInfo target) {
119 			return MonoCustomAttrs.GetCustomAttributesData (target);
120 		}
121 
GetCustomAttributesInternal(RuntimeType target)122 		internal static IList<CustomAttributeData> GetCustomAttributesInternal (RuntimeType target) {
123 			return MonoCustomAttrs.GetCustomAttributesData (target);
124 		}
125 
GetCustomAttributes(Module target)126 		public static IList<CustomAttributeData> GetCustomAttributes (Module target) {
127 			return MonoCustomAttrs.GetCustomAttributesData (target);
128 		}
129 
GetCustomAttributes(ParameterInfo target)130 		public static IList<CustomAttributeData> GetCustomAttributes (ParameterInfo target) {
131 			return MonoCustomAttrs.GetCustomAttributesData (target);
132 		}
133 
134 		public Type AttributeType {
135 			get { return ctorInfo.DeclaringType; }
136 		}
137 
ToString()138 		public override string ToString ()
139 		{
140 			ResolveArguments ();
141 
142 			StringBuilder sb = new StringBuilder ();
143 
144 			sb.Append ("[" + ctorInfo.DeclaringType.FullName + "(");
145 			for (int i = 0; i < ctorArgs.Count; i++) {
146 				sb.Append (ctorArgs [i].ToString ());
147 				if (i + 1 < ctorArgs.Count)
148 					sb.Append (", ");
149 			}
150 
151 			if (namedArgs.Count > 0)
152 				sb.Append (", ");
153 
154 			for (int j = 0; j < namedArgs.Count; j++) {
155 				sb.Append (namedArgs [j].ToString ());
156 				if (j + 1 < namedArgs.Count)
157 					sb.Append (", ");
158 			}
159 			sb.AppendFormat (")]");
160 
161 			return sb.ToString ();
162 		}
163 
UnboxValues(object [] values)164 		static T [] UnboxValues<T> (object [] values)
165 		{
166 			T [] retval = new T [values.Length];
167 			for (int i = 0; i < values.Length; i++)
168 				retval [i] = (T) values [i];
169 
170 			return retval;
171 		}
172 
Equals(object obj)173 		public override bool Equals (object obj)
174 		{
175 			CustomAttributeData other = obj as CustomAttributeData;
176 			if (other == null || other.ctorInfo != ctorInfo ||
177 			    other.ctorArgs.Count != ctorArgs.Count ||
178 			    other.namedArgs.Count != namedArgs.Count)
179 				return false;
180 			for (int i = 0; i < ctorArgs.Count; i++)
181 				if (ctorArgs [i].Equals (other.ctorArgs [i]))
182 					return false;
183 			for (int i = 0; i < namedArgs.Count; i++) {
184 				bool matched = false;
185 				for (int j = 0; j < other.namedArgs.Count; j++)
186 					if (namedArgs [i].Equals (other.namedArgs [j])) {
187 						matched = true;
188 						break;
189 					}
190 				if (!matched)
191 					return false;
192 			}
193 			return true;
194 		}
195 
GetHashCode()196 		public override int GetHashCode ()
197 		{
198 			int ret = ctorInfo == null ? 13 : (ctorInfo.GetHashCode () << 16);
199 			// argument order-dependent
200 			if (ctorArgs != null) {
201 				for (int i = 0; i < ctorArgs.Count; i++) {
202 					ret += ret ^ 7 + ctorArgs [i].GetHashCode () << (i * 4);
203 				}
204 			}
205 			// argument order-independent
206 			if (namedArgs != null) {
207 				for (int i = 0; i < namedArgs.Count; i++)
208 					ret += (namedArgs [i].GetHashCode () << 5);
209 			}
210 			return ret;
211 		}
212 	}
213 
214 }
215 
216