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