class/corlib/System.Reflection/CustomAttributeData.cs

   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 #if NET_4_0
  41         public
  42 #else
  43         public sealed
  44 #endif
  45         class CustomAttributeData {
  46                 ConstructorInfo ctorInfo;
  47                 IList<CustomAttributeTypedArgument> ctorArgs;
  48                 IList<CustomAttributeNamedArgument> namedArgs;
  49
  50 #if NET_4_0
  51                 protected CustomAttributeData ()
  52                 {
  53                 }
  54 #endif
  55
  56                 internal CustomAttributeData (ConstructorInfo ctorInfo, object [] ctorArgs, object [] namedArgs)
  57                 {
  58                         this.ctorInfo = ctorInfo;
  59
  60                         this.ctorArgs = Array.AsReadOnly<CustomAttributeTypedArgument>
  61                                 (ctorArgs != null ? UnboxValues<CustomAttributeTypedArgument> (ctorArgs) : new CustomAttributeTypedArgument [0]);
  62
  63                         this.namedArgs = Array.AsReadOnly<CustomAttributeNamedArgument>
  64                                 (namedArgs != null ? UnboxValues<CustomAttributeNamedArgument> (namedArgs) : new CustomAttributeNamedArgument [0]);
  65                 }
  66
  67                 [ComVisible (true)]
  68                 public
  69 #if NET_4_0
  70                 virtual
  71 #endif
  72                 ConstructorInfo Constructor {
  73                         get {
  74                                 return ctorInfo;
  75                         }
  76                 }
  77
  78                 [ComVisible (true)]
  79                 public
  80 #if NET_4_0
  81                 virtual
  82 #endif
  83                 IList<CustomAttributeTypedArgument> ConstructorArguments {
  84                         get {
  85                                 return ctorArgs;
  86                         }
  87                 }
  88
  89                 public
  90 #if NET_4_0
  91                 virtual
  92 #endif
  93                 IList<CustomAttributeNamedArgument> NamedArguments {
  94                         get {
  95                                 return namedArgs;
  96                         }
  97                 }
  98
  99                 public static IList<CustomAttributeData> GetCustomAttributes (Assembly target) {
 100                         return MonoCustomAttrs.GetCustomAttributesData (target);
 101                 }
 102
 103                 public static IList<CustomAttributeData> GetCustomAttributes (MemberInfo target) {
 104                         return MonoCustomAttrs.GetCustomAttributesData (target);
 105                 }
 106
 107                 public static IList<CustomAttributeData> GetCustomAttributes (Module target) {
 108                         return MonoCustomAttrs.GetCustomAttributesData (target);
 109                 }
 110
 111                 public static IList<CustomAttributeData> GetCustomAttributes (ParameterInfo target) {
 112                         return MonoCustomAttrs.GetCustomAttributesData (target);
 113                 }
 114
 115                 public override string ToString ()
 116                 {
 117                         StringBuilder sb = new StringBuilder ();
 118
 119                         sb.Append ("[" + ctorInfo.DeclaringType.FullName + "(");
 120                         for (int i = 0; i < ctorArgs.Count; i++) {
 121                                 sb.Append (ctorArgs [i].ToString ());
 122                                 if (i + 1 < ctorArgs.Count)
 123                                         sb.Append (", ");
 124                         }
 125
 126                         if (namedArgs.Count > 0)
 127                                 sb.Append (", ");
 128
 129                         for (int j = 0; j < namedArgs.Count; j++) {
 130                                 sb.Append (namedArgs [j].ToString ());
 131                                 if (j + 1 < namedArgs.Count)
 132                                         sb.Append (", ");
 133                         }
 134                         sb.AppendFormat (")]");
 135
 136                         return sb.ToString ();
 137                 }
 138
 139                 static T [] UnboxValues<T> (object [] values)
 140                 {
 141                         T [] retval = new T [values.Length];
 142                         for (int i = 0; i < values.Length; i++)
 143                                 retval [i] = (T) values [i];
 144
 145                         return retval;
 146                 }
 147
 148                 public override bool Equals (object obj)
 149                 {
 150                         CustomAttributeData other = obj as CustomAttributeData;
 151                         if (other == null || other.ctorInfo != ctorInfo ||
 152                             other.ctorArgs.Count != ctorArgs.Count ||
 153                             other.namedArgs.Count != namedArgs.Count)
 154                                 return false;
 155                         for (int i = 0; i < ctorArgs.Count; i++)
 156                                 if (ctorArgs [i].Equals (other.ctorArgs [i]))
 157                                         return false;
 158                         for (int i = 0; i < namedArgs.Count; i++) {
 159                                 bool matched = false;
 160                                 for (int j = 0; j < other.namedArgs.Count; j++)
 161                                         if (namedArgs [i].Equals (other.namedArgs [j])) {
 162                                                 matched = true;
 163                                                 break;
 164                                         }
 165                                 if (!matched)
 166                                         return false;
 167                         }
 168                         return true;
 169                 }
 170
 171                 public override int GetHashCode ()
 172                 {
 173                         int ret = ctorInfo.GetHashCode () << 16;
 174                         // argument order-dependent
 175                         for (int i = 0; i < ctorArgs.Count; i++)
 176                                 ret += ret ^ 7 + ctorArgs [i].GetHashCode () << (i * 4);
 177                         // argument order-independent
 178                         for (int i = 0; i < namedArgs.Count; i++)
 179                                 ret += (namedArgs [i].GetHashCode () << 5);
 180                         return ret;
 181                 }
 182         }
 183
 184 }
 185