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 (MonoGenericClass 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                 //
 104                 // MemberInfo members
 105                 //
 106
 107                 public override Type DeclaringType {
 108                         get {
 109                                 return instantiation;
 110                         }
 111                 }
 112
 113                 public override string Name {
 114                         get {
 115                                 return base_method.Name;
 116                         }
 117                 }
 118
 119                 public override Type ReflectedType {
 120                         get {
 121                                 return instantiation;
 122                         }
 123                 }
 124
 125                 public override Type ReturnType {
 126                         get {
 127                                 return base_method.ReturnType;
 128                         }
 129                 }
 130
 131                 public override bool IsDefined (Type attributeType, bool inherit)
 132                 {
 133                         throw new NotSupportedException ();
 134                 }
 135
 136                 public override object [] GetCustomAttributes (bool inherit)
 137                 {
 138                         throw new NotSupportedException ();
 139                 }
 140
 141                 public override object [] GetCustomAttributes (Type attributeType, bool inherit)
 142                 {
 143                         throw new NotSupportedException ();
 144                 }
 145
 146                 public override string ToString ()
 147                 {
 148                          //IEnumerable`1 get_Item(TKey)
 149                          StringBuilder sb = new StringBuilder (ReturnType.ToString ());
 150                          sb.Append (" ");
 151                          sb.Append (base_method.Name);
 152                          sb.Append ("(");
 153                          sb.Append (")");
 154                          return sb.ToString ();
 155                 }
 156                 //
 157                 // MethodBase members
 158                 //
 159
 160                 public override MethodImplAttributes GetMethodImplementationFlags ()
 161                 {
 162                         return base_method.GetMethodImplementationFlags ();
 163                 }
 164
 165                 public override ParameterInfo [] GetParameters ()
 166                 {
 167                         return GetParametersInternal ();
 168                 }
 169
 170                 internal override ParameterInfo [] GetParametersInternal ()
 171                 {
 172                         throw new NotSupportedException ();
 173                 }
 174
 175                 public override int MetadataToken {
 176                         get {
 177                                 return base.MetadataToken;
 178                         }
 179                 }
 180
 181                 internal override int GetParametersCount ()
 182                 {
 183                         return base_method.GetParametersCount ();
 184                 }
 185
 186                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 187                 {
 188                         throw new NotSupportedException ();
 189                 }
 190
 191                 public override RuntimeMethodHandle MethodHandle {
 192                         get {
 193                                 throw new NotSupportedException ();
 194                         }
 195                 }
 196
 197                 public override MethodAttributes Attributes {
 198                         get {
 199                                 return base_method.Attributes;
 200                         }
 201                 }
 202
 203                 public override CallingConventions CallingConvention {
 204                         get {
 205                                 return base_method.CallingConvention;
 206                         }
 207                 }
 208
 209                 public override MethodInfo MakeGenericMethod (params Type [] methodInstantiation)
 210                 {
 211                         if (!base_method.IsGenericMethodDefinition || (method_arguments != null))
 212                                 throw new InvalidOperationException ("Method is not a generic method definition");
 213
 214                         if (methodInstantiation == null)
 215                                 throw new ArgumentNullException ("methodInstantiation");
 216
 217                         if (base_method.GetGenericArguments ().Length != methodInstantiation.Length)
 218                                 throw new ArgumentException ("Incorrect length", "methodInstantiation");
 219
 220                         foreach (Type type in methodInstantiation) {
 221                                 if (type == null)
 222                                         throw new ArgumentNullException ("methodInstantiation");
 223                         }
 224
 225                         return new MethodOnTypeBuilderInst (this, methodInstantiation);
 226                 }
 227
 228                 public override Type [] GetGenericArguments ()
 229                 {
 230                         if (!base_method.IsGenericMethodDefinition)
 231                                 return null;
 232                         Type[] source = method_arguments ?? base_method.GetGenericArguments ();
 233                         Type[] result = new Type [source.Length];
 234                         source.CopyTo (result, 0);
 235                         return result;
 236                 }
 237
 238                 public override MethodInfo GetGenericMethodDefinition ()
 239                 {
 240                         return generic_method_definition ?? base_method;
 241                 }
 242
 243                 public override bool ContainsGenericParameters {
 244                         get {
 245                                 if (base_method.ContainsGenericParameters)
 246                                         return true;
 247                                 if (!base_method.IsGenericMethodDefinition)
 248                                         throw new NotSupportedException ();
 249                                 if (method_arguments == null)
 250                                         return true;
 251                                 foreach (Type t in method_arguments) {
 252                                         if (t.ContainsGenericParameters)
 253                                                 return true;
 254                                 }
 255                                 return false;
 256                         }
 257                 }
 258
 259                 public override bool IsGenericMethodDefinition {
 260                         get {
 261                                 return base_method.IsGenericMethodDefinition && method_arguments == null;
 262                         }
 263                 }
 264
 265                 public override bool IsGenericMethod {
 266                         get {
 267                                 return base_method.IsGenericMethodDefinition;
 268                         }
 269                 }
 270
 271                 //
 272                 // MethodInfo members
 273                 //
 274
 275                 public override MethodInfo GetBaseDefinition ()
 276                 {
 277                         throw new NotSupportedException ();
 278                 }
 279
 280                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 281                         get {
 282                                 throw new NotSupportedException ();
 283                         }
 284                 }
 285         }
 286 }
 287
 288 #endif