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                 MethodOnTypeBuilderInst generic_method_definition;
  47                 #endregion
  48
  49                 public MethodOnTypeBuilderInst (MonoGenericClass instantiation, MethodBuilder base_method)
  50                 {
  51                         this.instantiation = instantiation;
  52                         this.base_method = base_method;
  53                 }
  54
  55                 internal MethodOnTypeBuilderInst (MethodBuilder base_method, Type[] typeArguments)
  56                 {
  57                         this.instantiation = base_method.TypeBuilder;
  58                         this.base_method = base_method;
  59                         this.method_arguments = new Type [typeArguments.Length];
  60                         typeArguments.CopyTo (this.method_arguments, 0);
  61                 }
  62
  63                 internal MethodOnTypeBuilderInst (MethodOnTypeBuilderInst gmd, Type[] typeArguments)
  64                 {
  65                         this.instantiation = gmd.instantiation;
  66                         this.base_method = gmd.base_method;
  67                         this.method_arguments = new Type [typeArguments.Length];
  68                         typeArguments.CopyTo (this.method_arguments, 0);
  69                         this.generic_method_definition = gmd;
  70                 }
  71
  72                 internal Type[] GetTypeArgs ()
  73                 {
  74                         if (!instantiation.IsGenericType || instantiation.IsGenericParameter)
  75                                 return null;
  76
  77                         return instantiation.GetGenericArguments ();
  78                 }
  79
  80                 internal bool IsCompilerContext {
  81                         get { return instantiation.IsCompilerContext; }
  82                 }
  83
  84                 //
  85                 // MemberInfo members
  86                 //
  87
  88                 public override Type DeclaringType {
  89                         get {
  90                                 return instantiation;
  91                         }
  92                 }
  93
  94                 public override string Name {
  95                         get {
  96                                 return base_method.Name;
  97                         }
  98                 }
  99
 100                 public override Type ReflectedType {
 101                         get {
 102                                 return instantiation;
 103                         }
 104                 }
 105
 106                 public override Type ReturnType {
 107                         get {
 108                                 if (!IsCompilerContext)
 109                                         return base_method.ReturnType;
 110                                 return MonoGenericClass.InflateType (base_method.ReturnType, GetTypeArgs (), method_arguments);
 111                         }
 112                 }
 113
 114                 public override bool IsDefined (Type attributeType, bool inherit)
 115                 {
 116                         throw new NotSupportedException ();
 117                 }
 118
 119                 public override object [] GetCustomAttributes (bool inherit)
 120                 {
 121                         throw new NotSupportedException ();
 122                 }
 123
 124                 public override object [] GetCustomAttributes (Type attributeType, bool inherit)
 125                 {
 126                         throw new NotSupportedException ();
 127                 }
 128
 129                 public override string ToString ()
 130                 {
 131                          //IEnumerable`1 get_Item(TKey)
 132                          StringBuilder sb = new StringBuilder (ReturnType.ToString ());
 133                          sb.Append (" ");
 134                          sb.Append (base_method.Name);
 135                          sb.Append ("(");
 136                          if (IsCompilerContext) {
 137                                  ParameterInfo [] par = GetParameters ();
 138                                  for (int i = 0; i < par.Length; ++i) {
 139                                         if (i > 0)
 140                                                 sb.Append (", ");
 141                                         sb.Append (par [i].ParameterType);
 142                                  }
 143                         }
 144                          sb.Append (")");
 145                          return sb.ToString ();
 146                 }
 147                 //
 148                 // MethodBase members
 149                 //
 150
 151                 public override MethodImplAttributes GetMethodImplementationFlags ()
 152                 {
 153                         return base_method.GetMethodImplementationFlags ();
 154                 }
 155
 156                 public override ParameterInfo [] GetParameters ()
 157                 {
 158                         ParameterInfo [] res = null;
 159                         if (!IsCompilerContext)
 160                                 throw new NotSupportedException ();
 161
 162                         if (base_method is MethodBuilder) {
 163                                 MethodBuilder mb = (MethodBuilder)base_method;
 164                                 res = new ParameterInfo [mb.parameters.Length];
 165                                 for (int i = 0; i < mb.parameters.Length; i++) {
 166                                         Type type = MonoGenericClass.InflateType (mb.parameters [i], GetTypeArgs (), method_arguments);
 167                                         res [i] = new ParameterInfo (mb.pinfo == null ? null : mb.pinfo [i + 1], type, this, i + 1);
 168                                 }
 169                         } else {
 170                                 ParameterInfo[] base_params = base_method.GetParameters ();
 171                                 res = new ParameterInfo [base_params.Length];
 172                                 for (int i = 0; i < base_params.Length; i++) {
 173                                         Type type = MonoGenericClass.InflateType (base_params [i].ParameterType, GetTypeArgs (), method_arguments);
 174                                         res [i] = new ParameterInfo (base_params [i], type, this, i + 1);
 175                                 }
 176                         }
 177                         return res;
 178                 }
 179
 180                 public override int MetadataToken {
 181                         get {
 182                                 if (!IsCompilerContext)
 183                                         return base.MetadataToken;
 184                                 return base_method.MetadataToken;
 185                         }
 186                 }
 187
 188                 internal override int GetParameterCount ()
 189                 {
 190                         return base_method.GetParameterCount ();
 191                 }
 192
 193                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 194                 {
 195                         throw new NotSupportedException ();
 196                 }
 197
 198                 public override RuntimeMethodHandle MethodHandle {
 199                         get {
 200                                 throw new NotSupportedException ();
 201                         }
 202                 }
 203
 204                 public override MethodAttributes Attributes {
 205                         get {
 206                                 return base_method.Attributes;
 207                         }
 208                 }
 209
 210                 public override CallingConventions CallingConvention {
 211                         get {
 212                                 return base_method.CallingConvention;
 213                         }
 214                 }
 215
 216                 public override MethodInfo MakeGenericMethod (params Type [] methodInstantiation)
 217                 {
 218                         if (!base_method.IsGenericMethodDefinition || (method_arguments != null && !IsCompilerContext))
 219                                 throw new InvalidOperationException ("Method is not a generic method definition");
 220
 221                         if (methodInstantiation == null)
 222                                 throw new ArgumentNullException ("methodInstantiation");
 223
 224                         if (base_method.GetGenericArguments ().Length != methodInstantiation.Length)
 225                                 throw new ArgumentException ("Incorrect length", "methodInstantiation");
 226
 227                         foreach (Type type in methodInstantiation) {
 228                                 if (type == null)
 229                                         throw new ArgumentNullException ("methodInstantiation");
 230                         }
 231
 232                         return new MethodOnTypeBuilderInst (this, methodInstantiation);
 233                 }
 234
 235                 public override Type [] GetGenericArguments ()
 236                 {
 237                         if (!base_method.IsGenericMethodDefinition)
 238                                 return null;
 239                         Type[] source = method_arguments ?? base_method.GetGenericArguments ();
 240                         Type[] result = new Type [source.Length];
 241                         source.CopyTo (result, 0);
 242                         return result;
 243                 }
 244
 245                 public override MethodInfo GetGenericMethodDefinition ()
 246                 {
 247                         return (MethodInfo)generic_method_definition ?? base_method;
 248                 }
 249
 250                 public override bool ContainsGenericParameters {
 251                         get {
 252                                 if (!base_method.IsGenericMethodDefinition)
 253                                         throw new NotSupportedException ();
 254                                 if (method_arguments == null)
 255                                         return true;
 256                                 foreach (Type t in method_arguments) {
 257                                         if (t.ContainsGenericParameters)
 258                                                 return true;
 259                                 }
 260                                 return false;
 261                         }
 262                 }
 263
 264                 public override bool IsGenericMethodDefinition {
 265                         get {
 266                                 return base_method.IsGenericMethodDefinition && method_arguments == null;
 267                         }
 268                 }
 269
 270                 public override bool IsGenericMethod {
 271                         get {
 272                                 return base_method.IsGenericMethodDefinition;
 273                         }
 274                 }
 275
 276                 //
 277                 // MethodInfo members
 278                 //
 279
 280                 public override MethodInfo GetBaseDefinition ()
 281                 {
 282                         throw new NotSupportedException ();
 283                 }
 284
 285                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 286                         get {
 287                                 throw new NotSupportedException ();
 288                         }
 289                 }
 290         }
 291 }
 292