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