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 #if !FULL_AOT_RUNTIME
  31 using System;
  32 using System.Globalization;
  33 using System.Reflection;
  34 using System.Text;
  35 using System.Runtime.InteropServices;
  36
  37
  38 namespace System.Reflection.Emit
  39 {
  40         /*
  41          * This class represents a method of an instantiation of a generic type builder.
  42          */
  43         [StructLayout (LayoutKind.Sequential)]
  44         internal class MethodOnTypeBuilderInst : MethodInfo
  45         {
  46                 #region Keep in sync with object-internals.h
  47                 Type instantiation;
  48                 MethodInfo base_method; /*This is the base method definition, it must be non-inflated and belong to a non-inflated type.*/
  49                 Type[] method_arguments;
  50                 #endregion
  51                 MethodInfo generic_method_definition;
  52
  53                 public MethodOnTypeBuilderInst (TypeBuilderInstantiation instantiation, MethodInfo base_method)
  54                 {
  55                         this.instantiation = instantiation;
  56                         this.base_method = base_method;
  57                 }
  58
  59                 internal MethodOnTypeBuilderInst (MethodOnTypeBuilderInst gmd, Type[] typeArguments)
  60                 {
  61                         this.instantiation = gmd.instantiation;
  62                         this.base_method = gmd.base_method;
  63                         this.method_arguments = new Type [typeArguments.Length];
  64                         typeArguments.CopyTo (this.method_arguments, 0);
  65                         this.generic_method_definition = gmd;
  66                 }
  67
  68                 internal MethodOnTypeBuilderInst (MethodInfo method, Type[] typeArguments)
  69                 {
  70                         this.instantiation = method.DeclaringType;
  71                         this.base_method = ExtractBaseMethod (method);
  72                         this.method_arguments = new Type [typeArguments.Length];
  73                         typeArguments.CopyTo (this.method_arguments, 0);
  74                         if (base_method != method)
  75                                 this.generic_method_definition = method;
  76                 }
  77
  78                 static MethodInfo ExtractBaseMethod (MethodInfo info)
  79                 {
  80                         if (info is MethodBuilder)
  81                                 return info;
  82                         if (info is MethodOnTypeBuilderInst)
  83                                 return ((MethodOnTypeBuilderInst)info).base_method;
  84
  85                         if (info.IsGenericMethod)
  86                                 info = info.GetGenericMethodDefinition ();
  87
  88                         Type t = info.DeclaringType;
  89                         if (!t.IsGenericType || t.IsGenericTypeDefinition)
  90                                 return info;
  91
  92                         return (MethodInfo)t.Module.ResolveMethod (info.MetadataToken);
  93                 }
  94
  95                 internal Type[] GetTypeArgs ()
  96                 {
  97                         if (!instantiation.IsGenericType || instantiation.IsGenericParameter)
  98                                 return null;
  99
 100                         return instantiation.GetGenericArguments ();
 101                 }
 102
 103                 // Called from the runtime to return the corresponding finished MethodInfo object
 104                 internal MethodInfo RuntimeResolve () {
 105                         var type = instantiation.InternalResolve ();
 106                         var m = type.GetMethod (base_method);
 107                         if (method_arguments != null) {
 108                                 var args = new Type [method_arguments.Length];
 109                                 for (int i = 0; i < method_arguments.Length; ++i)
 110                                         args [i] = method_arguments [i].InternalResolve ();
 111                                 m = m.MakeGenericMethod (args);
 112                         }
 113                         return m;
 114                 }
 115
 116                 //
 117                 // MemberInfo members
 118                 //
 119
 120                 public override Type DeclaringType {
 121                         get {
 122                                 return instantiation;
 123                         }
 124                 }
 125
 126                 public override string Name {
 127                         get {
 128                                 return base_method.Name;
 129                         }
 130                 }
 131
 132                 public override Type ReflectedType {
 133                         get {
 134                                 return instantiation;
 135                         }
 136                 }
 137
 138                 public override Type ReturnType {
 139                         get {
 140                                 return base_method.ReturnType;
 141                         }
 142                 }
 143
 144                 public override Module Module {
 145                         get {
 146                                 return base_method.Module;
 147                         }
 148                 }
 149
 150                 public override bool IsDefined (Type attributeType, bool inherit)
 151                 {
 152                         throw new NotSupportedException ();
 153                 }
 154
 155                 public override object [] GetCustomAttributes (bool inherit)
 156                 {
 157                         throw new NotSupportedException ();
 158                 }
 159
 160                 public override object [] GetCustomAttributes (Type attributeType, bool inherit)
 161                 {
 162                         throw new NotSupportedException ();
 163                 }
 164
 165                 public override string ToString ()
 166                 {
 167                          //IEnumerable`1 get_Item(TKey)
 168                          StringBuilder sb = new StringBuilder (ReturnType.ToString ());
 169                          sb.Append (" ");
 170                          sb.Append (base_method.Name);
 171                          sb.Append ("(");
 172                          sb.Append (")");
 173                          return sb.ToString ();
 174                 }
 175                 //
 176                 // MethodBase members
 177                 //
 178
 179                 public override MethodImplAttributes GetMethodImplementationFlags ()
 180                 {
 181                         return base_method.GetMethodImplementationFlags ();
 182                 }
 183
 184                 public override ParameterInfo [] GetParameters ()
 185                 {
 186                         return GetParametersInternal ();
 187                 }
 188
 189                 internal override ParameterInfo [] GetParametersInternal ()
 190                 {
 191                         throw new NotSupportedException ();
 192                 }
 193
 194                 public override int MetadataToken {
 195                         get {
 196                                 return base.MetadataToken;
 197                         }
 198                 }
 199
 200                 internal override int GetParametersCount ()
 201                 {
 202                         return base_method.GetParametersCount ();
 203                 }
 204
 205                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 206                 {
 207                         throw new NotSupportedException ();
 208                 }
 209
 210                 public override RuntimeMethodHandle MethodHandle {
 211                         get {
 212                                 throw new NotSupportedException ();
 213                         }
 214                 }
 215
 216                 public override MethodAttributes Attributes {
 217                         get {
 218                                 return base_method.Attributes;
 219                         }
 220                 }
 221
 222                 public override CallingConventions CallingConvention {
 223                         get {
 224                                 return base_method.CallingConvention;
 225                         }
 226                 }
 227
 228                 public override MethodInfo MakeGenericMethod (params Type [] methodInstantiation)
 229                 {
 230                         if (!base_method.IsGenericMethodDefinition || (method_arguments != null))
 231                                 throw new InvalidOperationException ("Method is not a generic method definition");
 232
 233                         if (methodInstantiation == null)
 234                                 throw new ArgumentNullException ("methodInstantiation");
 235
 236                         if (base_method.GetGenericArguments ().Length != methodInstantiation.Length)
 237                                 throw new ArgumentException ("Incorrect length", "methodInstantiation");
 238
 239                         foreach (Type type in methodInstantiation) {
 240                                 if (type == null)
 241                                         throw new ArgumentNullException ("methodInstantiation");
 242                         }
 243
 244                         return new MethodOnTypeBuilderInst (this, methodInstantiation);
 245                 }
 246
 247                 public override Type [] GetGenericArguments ()
 248                 {
 249                         if (!base_method.IsGenericMethodDefinition)
 250                                 return null;
 251                         Type[] source = method_arguments ?? base_method.GetGenericArguments ();
 252                         Type[] result = new Type [source.Length];
 253                         source.CopyTo (result, 0);
 254                         return result;
 255                 }
 256
 257                 public override MethodInfo GetGenericMethodDefinition ()
 258                 {
 259                         return generic_method_definition ?? base_method;
 260                 }
 261
 262                 public override bool ContainsGenericParameters {
 263                         get {
 264                                 if (base_method.ContainsGenericParameters)
 265                                         return true;
 266                                 if (!base_method.IsGenericMethodDefinition)
 267                                         throw new NotSupportedException ();
 268                                 if (method_arguments == null)
 269                                         return true;
 270                                 foreach (Type t in method_arguments) {
 271                                         if (t.ContainsGenericParameters)
 272                                                 return true;
 273                                 }
 274                                 return false;
 275                         }
 276                 }
 277
 278                 public override bool IsGenericMethodDefinition {
 279                         get {
 280                                 return base_method.IsGenericMethodDefinition && method_arguments == null;
 281                         }
 282                 }
 283
 284                 public override bool IsGenericMethod {
 285                         get {
 286                                 return base_method.IsGenericMethodDefinition;
 287                         }
 288                 }
 289
 290                 //
 291                 // MethodInfo members
 292                 //
 293
 294                 public override MethodInfo GetBaseDefinition ()
 295                 {
 296                         throw new NotSupportedException ();
 297                 }
 298
 299                 public override ParameterInfo ReturnParameter {
 300                         get {
 301                                 throw new NotSupportedException();
 302                         }
 303                 }
 304
 305                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 306                         get {
 307                                 throw new NotSupportedException ();
 308                         }
 309                 }
 310         }
 311 }
 312
 313 #endif