mcs/class/corlib/System.Reflection.Emit/MethodOnTypeBuilderInst.cs

   1 //
   2 // System.Reflection.Emit/MethodOnTypeBuilderInst.cs
   3 //
   4 // Author:
   5 //   Zoltan Varga (vargaz@gmail.com)
   6 //
   7 //
   8 // Copyright (C) 2008 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.Globalization;
  32 using System.Reflection;
  33 using System.Text;
  34
  35 namespace System.Reflection.Emit
  36 {
  37         /*
  38          * This class represents a method of an instantiation of a generic type builder.
  39          */
  40         internal class MethodOnTypeBuilderInst : MethodInfo
  41         {
  42                 #region Keep in sync with object-internals.h
  43                 Type instantiation;
  44                 MethodInfo base_method; /*This is the base method definition, it must be non-inflated and belong to a non-inflated type.*/
  45                 Type[] method_arguments;
  46                 #endregion
  47                 MethodInfo generic_method_definition;
  48
  49                 public MethodOnTypeBuilderInst (MonoGenericClass instantiation, MethodInfo base_method)
  50                 {
  51                         this.instantiation = instantiation;
  52                         this.base_method = base_method;
  53                 }
  54
  55                 internal MethodOnTypeBuilderInst (MethodOnTypeBuilderInst gmd, Type[] typeArguments)
  56                 {
  57                         this.instantiation = gmd.instantiation;
  58                         this.base_method = gmd.base_method;
  59                         this.method_arguments = new Type [typeArguments.Length];
  60                         typeArguments.CopyTo (this.method_arguments, 0);
  61                         this.generic_method_definition = gmd;
  62                 }
  63
  64                 internal MethodOnTypeBuilderInst (MethodInfo method, Type[] typeArguments)
  65                 {
  66                         this.instantiation = method.DeclaringType;
  67                         this.base_method = ExtractBaseMethod (method);
  68                         this.method_arguments = new Type [typeArguments.Length];
  69                         typeArguments.CopyTo (this.method_arguments, 0);
  70                         if (base_method != method)
  71                                 this.generic_method_definition = method;
  72                 }
  73
  74                 static MethodInfo ExtractBaseMethod (MethodInfo info)
  75                 {
  76                         if (info is MethodBuilder)
  77                                 return info;
  78                         if (info is MethodOnTypeBuilderInst)
  79                                 return ((MethodOnTypeBuilderInst)info).base_method;
  80
  81                         if (info.IsGenericMethod)
  82                                 info = info.GetGenericMethodDefinition ();
  83
  84                         Type t = info.DeclaringType;
  85                         if (!t.IsGenericType || t.IsGenericTypeDefinition)
  86                                 return info;
  87
  88                         return (MethodInfo)t.Module.ResolveMethod (info.MetadataToken);
  89                 }
  90
  91                 internal Type[] GetTypeArgs ()
  92                 {
  93                         if (!instantiation.IsGenericType || instantiation.IsGenericParameter)
  94                                 return null;
  95
  96                         return instantiation.GetGenericArguments ();
  97                 }
  98
  99                 //
 100                 // MemberInfo members
 101                 //
 102
 103                 public override Type DeclaringType {
 104                         get {
 105                                 return instantiation;
 106                         }
 107                 }
 108
 109                 public override string Name {
 110                         get {
 111                                 return base_method.Name;
 112                         }
 113                 }
 114
 115                 public override Type ReflectedType {
 116                         get {
 117                                 return instantiation;
 118                         }
 119                 }
 120
 121                 public override Type ReturnType {
 122                         get {
 123                                 return base_method.ReturnType;
 124                         }
 125                 }
 126
 127                 public override bool IsDefined (Type attributeType, bool inherit)
 128                 {
 129                         throw new NotSupportedException ();
 130                 }
 131
 132                 public override object [] GetCustomAttributes (bool inherit)
 133                 {
 134                         throw new NotSupportedException ();
 135                 }
 136
 137                 public override object [] GetCustomAttributes (Type attributeType, bool inherit)
 138                 {
 139                         throw new NotSupportedException ();
 140                 }
 141
 142                 public override string ToString ()
 143                 {
 144                          //IEnumerable`1 get_Item(TKey)
 145                          StringBuilder sb = new StringBuilder (ReturnType.ToString ());
 146                          sb.Append (" ");
 147                          sb.Append (base_method.Name);
 148                          sb.Append ("(");
 149                          sb.Append (")");
 150                          return sb.ToString ();
 151                 }
 152                 //
 153                 // MethodBase members
 154                 //
 155
 156                 public override MethodImplAttributes GetMethodImplementationFlags ()
 157                 {
 158                         return base_method.GetMethodImplementationFlags ();
 159                 }
 160
 161                 public override ParameterInfo [] GetParameters ()
 162                 {
 163                         throw new NotSupportedException ();
 164                 }
 165
 166                 public override int MetadataToken {
 167                         get {
 168                                 return base.MetadataToken;
 169                         }
 170                 }
 171
 172                 internal override int GetParameterCount ()
 173                 {
 174                         return base_method.GetParameterCount ();
 175                 }
 176
 177                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 178                 {
 179                         throw new NotSupportedException ();
 180                 }
 181
 182                 public override RuntimeMethodHandle MethodHandle {
 183                         get {
 184                                 throw new NotSupportedException ();
 185                         }
 186                 }
 187
 188                 public override MethodAttributes Attributes {
 189                         get {
 190                                 return base_method.Attributes;
 191                         }
 192                 }
 193
 194                 public override CallingConventions CallingConvention {
 195                         get {
 196                                 return base_method.CallingConvention;
 197                         }
 198                 }
 199
 200                 public override MethodInfo MakeGenericMethod (params Type [] methodInstantiation)
 201                 {
 202                         if (!base_method.IsGenericMethodDefinition || (method_arguments != null))
 203                                 throw new InvalidOperationException ("Method is not a generic method definition");
 204
 205                         if (methodInstantiation == null)
 206                                 throw new ArgumentNullException ("methodInstantiation");
 207
 208                         if (base_method.GetGenericArguments ().Length != methodInstantiation.Length)
 209                                 throw new ArgumentException ("Incorrect length", "methodInstantiation");
 210
 211                         foreach (Type type in methodInstantiation) {
 212                                 if (type == null)
 213                                         throw new ArgumentNullException ("methodInstantiation");
 214                         }
 215
 216                         return new MethodOnTypeBuilderInst (this, methodInstantiation);
 217                 }
 218
 219                 public override Type [] GetGenericArguments ()
 220                 {
 221                         if (!base_method.IsGenericMethodDefinition)
 222                                 return null;
 223                         Type[] source = method_arguments ?? base_method.GetGenericArguments ();
 224                         Type[] result = new Type [source.Length];
 225                         source.CopyTo (result, 0);
 226                         return result;
 227                 }
 228
 229                 public override MethodInfo GetGenericMethodDefinition ()
 230                 {
 231                         return generic_method_definition ?? base_method;
 232                 }
 233
 234                 public override bool ContainsGenericParameters {
 235                         get {
 236                                 if (base_method.ContainsGenericParameters)
 237                                         return true;
 238                                 if (!base_method.IsGenericMethodDefinition)
 239                                         throw new NotSupportedException ();
 240                                 if (method_arguments == null)
 241                                         return true;
 242                                 foreach (Type t in method_arguments) {
 243                                         if (t.ContainsGenericParameters)
 244                                                 return true;
 245                                 }
 246                                 return false;
 247                         }
 248                 }
 249
 250                 public override bool IsGenericMethodDefinition {
 251                         get {
 252                                 return base_method.IsGenericMethodDefinition && method_arguments == null;
 253                         }
 254                 }
 255
 256                 public override bool IsGenericMethod {
 257                         get {
 258                                 return base_method.IsGenericMethodDefinition;
 259                         }
 260                 }
 261
 262                 //
 263                 // MethodInfo members
 264                 //
 265
 266                 public override MethodInfo GetBaseDefinition ()
 267                 {
 268                         throw new NotSupportedException ();
 269                 }
 270
 271                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 272                         get {
 273                                 throw new NotSupportedException ();
 274                         }
 275                 }
 276         }
 277 }
 278