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                 int is_compiler_context = -1;
  49
  50                 public MethodOnTypeBuilderInst (MonoGenericClass instantiation, MethodInfo base_method)
  51                 {
  52                         this.instantiation = instantiation;
  53                         this.base_method = base_method;
  54                 }
  55
  56                 internal MethodOnTypeBuilderInst (MethodOnTypeBuilderInst gmd, Type[] typeArguments)
  57                 {
  58                         this.instantiation = gmd.instantiation;
  59                         this.base_method = gmd.base_method;
  60                         this.method_arguments = new Type [typeArguments.Length];
  61                         typeArguments.CopyTo (this.method_arguments, 0);
  62                         this.generic_method_definition = gmd;
  63                 }
  64
  65                 internal MethodOnTypeBuilderInst (MethodInfo method, Type[] typeArguments)
  66                 {
  67                         this.instantiation = method.DeclaringType;
  68                         this.base_method = ExtractBaseMethod (method);
  69                         this.method_arguments = new Type [typeArguments.Length];
  70                         typeArguments.CopyTo (this.method_arguments, 0);
  71                         if (base_method != method)
  72                                 this.generic_method_definition = method;
  73                 }
  74
  75                 static MethodInfo ExtractBaseMethod (MethodInfo info)
  76                 {
  77                         if (info is MethodBuilder)
  78                                 return info;
  79                         if (info is MethodOnTypeBuilderInst)
  80                                 return ((MethodOnTypeBuilderInst)info).base_method;
  81
  82                         if (info.IsGenericMethod)
  83                                 info = info.GetGenericMethodDefinition ();
  84
  85                         Type t = info.DeclaringType;
  86                         if (!t.IsGenericType || t.IsGenericTypeDefinition)
  87                                 return info;
  88
  89                         return (MethodInfo)t.Module.ResolveMethod (info.MetadataToken);
  90                 }
  91
  92                 internal Type[] GetTypeArgs ()
  93                 {
  94                         if (!instantiation.IsGenericType || instantiation.IsGenericParameter)
  95                                 return null;
  96
  97                         return instantiation.GetGenericArguments ();
  98                 }
  99
 100                 internal bool IsCompilerContext {
 101                         get {
 102                                 if (is_compiler_context == -1) {
 103                                         bool is_cc = false;
 104                                         is_cc |= instantiation.IsCompilerContext;
 105                                         if (!is_cc && method_arguments != null) {
 106                                                 foreach (Type t in method_arguments)
 107                                                         is_cc |= t.IsCompilerContext;
 108                                         }
 109                                         is_compiler_context = is_cc ? 1 : 0;
 110                                 }
 111                                 return is_compiler_context == 1;
 112                         }
 113                 }
 114
 115                 //
 116                 // MemberInfo members
 117                 //
 118
 119                 public override Type DeclaringType {
 120                         get {
 121                                 return instantiation;
 122                         }
 123                 }
 124
 125                 public override string Name {
 126                         get {
 127                                 return base_method.Name;
 128                         }
 129                 }
 130
 131                 public override Type ReflectedType {
 132                         get {
 133                                 return instantiation;
 134                         }
 135                 }
 136
 137                 public override Type ReturnType {
 138                         get {
 139                                 if (!IsCompilerContext)
 140                                         return base_method.ReturnType;
 141                                 return MonoGenericClass.InflateType (base_method.ReturnType, GetTypeArgs (), method_arguments);
 142                         }
 143                 }
 144
 145                 public override bool IsDefined (Type attributeType, bool inherit)
 146                 {
 147                         if (!IsCompilerContext)
 148                                 throw new NotSupportedException ();
 149                         return base_method.IsDefined (attributeType, inherit);
 150                 }
 151
 152                 public override object [] GetCustomAttributes (bool inherit)
 153                 {
 154                         if (!IsCompilerContext)
 155                                 throw new NotSupportedException ();
 156                         return base_method.GetCustomAttributes (inherit);
 157                 }
 158
 159                 public override object [] GetCustomAttributes (Type attributeType, bool inherit)
 160                 {
 161                         if (!IsCompilerContext)
 162                                 throw new NotSupportedException ();
 163                         return base_method.GetCustomAttributes (attributeType, inherit);
 164                 }
 165
 166                 public override string ToString ()
 167                 {
 168                          //IEnumerable`1 get_Item(TKey)
 169                          StringBuilder sb = new StringBuilder (ReturnType.ToString ());
 170                          sb.Append (" ");
 171                          sb.Append (base_method.Name);
 172                          sb.Append ("(");
 173                          if (IsCompilerContext) {
 174                                  ParameterInfo [] par = GetParameters ();
 175                                  for (int i = 0; i < par.Length; ++i) {
 176                                         if (i > 0)
 177                                                 sb.Append (", ");
 178                                         sb.Append (par [i].ParameterType);
 179                                  }
 180                         }
 181                          sb.Append (")");
 182                          return sb.ToString ();
 183                 }
 184                 //
 185                 // MethodBase members
 186                 //
 187
 188                 public override MethodImplAttributes GetMethodImplementationFlags ()
 189                 {
 190                         return base_method.GetMethodImplementationFlags ();
 191                 }
 192
 193                 public override ParameterInfo [] GetParameters ()
 194                 {
 195                         ParameterInfo [] res = null;
 196                         if (!IsCompilerContext)
 197                                 throw new NotSupportedException ();
 198
 199                         if (base_method is MethodBuilder) {
 200                                 MethodBuilder mb = (MethodBuilder)base_method;
 201                                 res = new ParameterInfo [mb.parameters.Length];
 202                                 for (int i = 0; i < mb.parameters.Length; i++) {
 203                                         Type type = MonoGenericClass.InflateType (mb.parameters [i], GetTypeArgs (), method_arguments);
 204                                         res [i] = new ParameterInfo (mb.pinfo == null ? null : mb.pinfo [i + 1], type, this, i + 1);
 205                                 }
 206                         } else {
 207                                 ParameterInfo[] base_params = base_method.GetParameters ();
 208                                 res = new ParameterInfo [base_params.Length];
 209                                 for (int i = 0; i < base_params.Length; i++) {
 210                                         Type type = MonoGenericClass.InflateType (base_params [i].ParameterType, GetTypeArgs (), method_arguments);
 211                                         res [i] = new ParameterInfo (base_params [i], type, this, i + 1);
 212                                 }
 213                         }
 214                         return res;
 215                 }
 216
 217                 public override int MetadataToken {
 218                         get {
 219                                 if (!IsCompilerContext)
 220                                         return base.MetadataToken;
 221                                 return base_method.MetadataToken;
 222                         }
 223                 }
 224
 225                 internal override int GetParameterCount ()
 226                 {
 227                         return base_method.GetParameterCount ();
 228                 }
 229
 230                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 231                 {
 232                         throw new NotSupportedException ();
 233                 }
 234
 235                 public override RuntimeMethodHandle MethodHandle {
 236                         get {
 237                                 throw new NotSupportedException ();
 238                         }
 239                 }
 240
 241                 public override MethodAttributes Attributes {
 242                         get {
 243                                 return base_method.Attributes;
 244                         }
 245                 }
 246
 247                 public override CallingConventions CallingConvention {
 248                         get {
 249                                 return base_method.CallingConvention;
 250                         }
 251                 }
 252
 253                 public override MethodInfo MakeGenericMethod (params Type [] methodInstantiation)
 254                 {
 255                         if (!base_method.IsGenericMethodDefinition || (method_arguments != null && !IsCompilerContext))
 256                                 throw new InvalidOperationException ("Method is not a generic method definition");
 257
 258                         if (methodInstantiation == null)
 259                                 throw new ArgumentNullException ("methodInstantiation");
 260
 261                         if (base_method.GetGenericArguments ().Length != methodInstantiation.Length)
 262                                 throw new ArgumentException ("Incorrect length", "methodInstantiation");
 263
 264                         foreach (Type type in methodInstantiation) {
 265                                 if (type == null)
 266                                         throw new ArgumentNullException ("methodInstantiation");
 267                         }
 268
 269                         return new MethodOnTypeBuilderInst (this, methodInstantiation);
 270                 }
 271
 272                 public override Type [] GetGenericArguments ()
 273                 {
 274                         if (!base_method.IsGenericMethodDefinition)
 275                                 return null;
 276                         Type[] source = method_arguments ?? base_method.GetGenericArguments ();
 277                         Type[] result = new Type [source.Length];
 278                         source.CopyTo (result, 0);
 279                         return result;
 280                 }
 281
 282                 public override MethodInfo GetGenericMethodDefinition ()
 283                 {
 284                         return generic_method_definition ?? base_method;
 285                 }
 286
 287                 public override bool ContainsGenericParameters {
 288                         get {
 289                                 if (base_method.ContainsGenericParameters)
 290                                         return true;
 291                                 if (!base_method.IsGenericMethodDefinition)
 292                                         throw new NotSupportedException ();
 293                                 if (method_arguments == null)
 294                                         return true;
 295                                 foreach (Type t in method_arguments) {
 296                                         if (t.ContainsGenericParameters)
 297                                                 return true;
 298                                 }
 299                                 return false;
 300                         }
 301                 }
 302
 303                 public override bool IsGenericMethodDefinition {
 304                         get {
 305                                 return base_method.IsGenericMethodDefinition && method_arguments == null;
 306                         }
 307                 }
 308
 309                 public override bool IsGenericMethod {
 310                         get {
 311                                 return base_method.IsGenericMethodDefinition;
 312                         }
 313                 }
 314
 315                 //
 316                 // MethodInfo members
 317                 //
 318
 319                 public override MethodInfo GetBaseDefinition ()
 320                 {
 321                         throw new NotSupportedException ();
 322                 }
 323
 324                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 325                         get {
 326                                 throw new NotSupportedException ();
 327                         }
 328                 }
 329         }
 330 }
 331