mcs/class/corlib/System.Reflection/MonoGenericClass.cs

   1 //
   2 // System.Reflection.MonoGenericClass
   3 //
   4 // Sean MacIsaac (macisaac@ximian.com)
   5 // Paolo Molaro (lupus@ximian.com)
   6 // Patrik Torstensson (patrik.torstensson@labs2.com)
   7 //
   8 // (C) 2001 Ximian, Inc.
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System.Reflection;
  35 using System.Reflection.Emit;
  36 using System.Collections;
  37 using System.Runtime.CompilerServices;
  38 using System.Globalization;
  39 using System.Runtime.Serialization;
  40
  41 #if NET_2_0 || BOOTSTRAP_NET_2_0
  42
  43 namespace System.Reflection
  44 {
  45         /*
  46          * MonoGenericClass represents an instantiation of a generic TypeBuilder. MS
  47          * calls this class TypeBuilderInstantiation (a much better name). MS returns
  48          * NotImplementedException for many of the methods but we can't do that as gmcs
  49          * depends on them.
  50          */
  51         internal class MonoGenericClass : MonoType
  52         {
  53                 #region Keep in sync with object-internals.h
  54 #pragma warning disable 649
  55                 internal TypeBuilder generic_type;
  56                 bool initialized;
  57 #pragma warning restore 649
  58                 #endregion
  59
  60                 Hashtable fields, ctors, methods;
  61
  62                 internal MonoGenericClass ()
  63                         : base (null)
  64                 {
  65                         // this should not be used
  66                         throw new InvalidOperationException ();
  67                 }
  68
  69                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  70                 extern void initialize (MethodInfo[] methods, ConstructorInfo[] ctors, FieldInfo[] fields, PropertyInfo[] properties, EventInfo[] events);
  71
  72                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  73                 extern MethodInfo GetCorrespondingInflatedMethod (MethodInfo generic);
  74
  75                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  76                 extern EventInfo[] GetEvents_internal (Type reflected_type);
  77
  78                 private const BindingFlags flags = BindingFlags.Public | BindingFlags.NonPublic |
  79                 BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
  80
  81                 void initialize ()
  82                 {
  83                         if (initialized)
  84                                 return;
  85
  86                         MonoGenericClass parent = GetParentType () as MonoGenericClass;
  87                         if (parent != null)
  88                                 parent.initialize ();
  89
  90                         initialize (generic_type.GetMethods (flags),
  91                                                 generic_type.GetConstructors (flags),
  92                                                 generic_type.GetFields (flags),
  93                                                 generic_type.GetProperties (flags),
  94                                                 generic_type.GetEvents_internal (flags));
  95
  96                         initialized = true;
  97                 }
  98
  99                 Type GetParentType ()
 100                 {
 101                         return InflateType (generic_type.BaseType);
 102                 }
 103
 104                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 105                 private extern Type InflateType_internal (Type type);
 106
 107                 internal Type InflateType (Type type)
 108                 {
 109                         if (type == null)
 110                                 return null;
 111                         if (!type.IsGenericParameter && !type.ContainsGenericParameters)
 112                                 return type;
 113                         return InflateType_internal (type);
 114                 }
 115
 116                 public override Type BaseType {
 117                         get {
 118                                 Type parent = GetParentType ();
 119                                 return parent != null ? parent : generic_type.BaseType;
 120                         }
 121                 }
 122
 123                 Type[] GetInterfacesInternal ()
 124                 {
 125                         if (generic_type.interfaces == null)
 126                                 return new Type [0];
 127                         Type[] res = new Type [generic_type.interfaces.Length];
 128                         for (int i = 0; i < res.Length; ++i)
 129                                 res [i] = InflateType (generic_type.interfaces [i]);
 130                         return res;
 131                 }
 132
 133                 public override Type[] GetInterfaces ()
 134                 {
 135                         if (!generic_type.IsCompilerContext)
 136                                 throw new NotSupportedException ();
 137                         return GetInterfacesInternal ();
 138                 }
 139
 140                 protected override bool IsValueTypeImpl ()
 141                 {
 142                         return generic_type.IsValueType;
 143                 }
 144
 145                 internal override MethodInfo GetMethod (MethodInfo fromNoninstanciated)
 146                 {
 147                         initialize ();
 148
 149                         if (!(fromNoninstanciated is MethodBuilder))
 150                                 throw new InvalidOperationException ("Inflating non MethodBuilder objects is not supported: " + fromNoninstanciated.GetType ());
 151
 152                         if (fromNoninstanciated is MethodBuilder) {
 153                                 MethodBuilder mb = (MethodBuilder)fromNoninstanciated;
 154
 155                                 // FIXME: We can't yet handle creating generic instantiations of
 156                                 // MethodOnTypeBuilderInst objects
 157                                 // Also, mono_image_get_method_on_inst_token () can't handle generic
 158                                 // methods
 159                                 if (!mb.IsGenericMethodDefinition) {
 160                                         if (methods == null)
 161                                                 methods = new Hashtable ();
 162                                         if (!methods.ContainsKey (mb))
 163                                                 methods [mb] = new MethodOnTypeBuilderInst (this, mb);
 164                                         return (MethodInfo)methods [mb];
 165                                 }
 166                         }
 167
 168                         return GetCorrespondingInflatedMethod (fromNoninstanciated);
 169                 }
 170
 171                 internal override ConstructorInfo GetConstructor (ConstructorInfo fromNoninstanciated)
 172                 {
 173                         initialize ();
 174
 175                         if (!(fromNoninstanciated is ConstructorBuilder))
 176                                 throw new InvalidOperationException ("Inflating non ConstructorBuilder objects is not supported: " + fromNoninstanciated.GetType ());
 177
 178                         ConstructorBuilder cb = (ConstructorBuilder)fromNoninstanciated;
 179                         if (ctors == null)
 180                                 ctors = new Hashtable ();
 181                         if (!ctors.ContainsKey (cb))
 182                                 ctors [cb] = new ConstructorOnTypeBuilderInst (this, cb);
 183                         return (ConstructorInfo)ctors [cb];
 184                 }
 185
 186                 internal override FieldInfo GetField (FieldInfo fromNoninstanciated)
 187                 {
 188                         initialize ();
 189
 190                         if (!(fromNoninstanciated is FieldBuilder))
 191                                 throw new InvalidOperationException ("Inflating non FieldBuilder objects is not supported: " + fromNoninstanciated.GetType ());
 192
 193                         FieldBuilder fb = (FieldBuilder)fromNoninstanciated;
 194                         if (fields == null)
 195                                 fields = new Hashtable ();
 196                         if (!fields.ContainsKey (fb))
 197                                 fields [fb] = new FieldOnTypeBuilderInst (this, fb);
 198                         return (FieldInfo)fields [fb];
 199                 }
 200
 201                 public override MethodInfo[] GetMethods (BindingFlags bf)
 202                 {
 203                         if (!generic_type.IsCompilerContext)
 204                                 throw new NotSupportedException ();
 205
 206                         ArrayList l = new ArrayList ();
 207
 208                         //
 209                         // Walk up our class hierarchy and retrieve methods from our
 210                         // parent classes.
 211                         //
 212
 213                         Type current_type = this;
 214                         do {
 215                                 MonoGenericClass gi = current_type as MonoGenericClass;
 216                                 if (gi != null)
 217                                         l.AddRange (gi.GetMethodsInternal (bf, this));
 218                                 else if (current_type is TypeBuilder)
 219                                         l.AddRange (current_type.GetMethods (bf));
 220                                 else {
 221                                         // If we encounter a `MonoType', its
 222                                         // GetMethodsByName() will return all the methods
 223                                         // from its parent type(s), so we can stop here.
 224                                         MonoType mt = (MonoType) current_type;
 225                                         l.AddRange (mt.GetMethodsByName (null, bf, false, this));
 226                                         break;
 227                                 }
 228
 229                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 230                                         break;
 231                                 current_type = current_type.BaseType;
 232                         } while (current_type != null);
 233
 234                         MethodInfo[] result = new MethodInfo [l.Count];
 235                         l.CopyTo (result);
 236                         return result;
 237                 }
 238
 239                 MethodInfo[] GetMethodsInternal (BindingFlags bf, MonoGenericClass reftype)
 240                 {
 241                         if (generic_type.num_methods == 0)
 242                                 return new MethodInfo [0];
 243
 244                         ArrayList l = new ArrayList ();
 245                         bool match;
 246                         MethodAttributes mattrs;
 247                         MethodInfo accessor;
 248
 249                         initialize ();
 250
 251                         for (int i = 0; i < generic_type.num_methods; ++i) {
 252                                 MethodInfo c = generic_type.methods [i];
 253
 254                                 match = false;
 255                                 mattrs = c.Attributes;
 256                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 257                                         if ((bf & BindingFlags.Public) != 0)
 258                                                 match = true;
 259                                 } else {
 260                                         if ((bf & BindingFlags.NonPublic) != 0)
 261                                                 match = true;
 262                                 }
 263                                 if (!match)
 264                                         continue;
 265                                 match = false;
 266                                 if ((mattrs & MethodAttributes.Static) != 0) {
 267                                         if ((bf & BindingFlags.Static) != 0)
 268                                                 match = true;
 269                                 } else {
 270                                         if ((bf & BindingFlags.Instance) != 0)
 271                                                 match = true;
 272                                 }
 273                                 if (!match)
 274                                         continue;
 275                                 c = TypeBuilder.GetMethod (this, c);
 276                                 l.Add (c);
 277                         }
 278
 279                         MethodInfo[] result = new MethodInfo [l.Count];
 280                         l.CopyTo (result);
 281                         return result;
 282                 }
 283
 284                 public override ConstructorInfo[] GetConstructors (BindingFlags bf)
 285                 {
 286                         if (!generic_type.IsCompilerContext)
 287                                 throw new NotSupportedException ();
 288
 289                         ArrayList l = new ArrayList ();
 290
 291                         Type current_type = this;
 292                         do {
 293                                 MonoGenericClass gi = current_type as MonoGenericClass;
 294                                 if (gi != null)
 295                                         l.AddRange (gi.GetConstructorsInternal (bf, this));
 296                                 else if (current_type is TypeBuilder)
 297                                         l.AddRange (current_type.GetConstructors (bf));
 298                                 else {
 299                                         MonoType mt = (MonoType) current_type;
 300                                         l.AddRange (mt.GetConstructors_internal (bf, this));
 301                                         break;
 302                                 }
 303
 304                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 305                                         break;
 306                                 current_type = current_type.BaseType;
 307                         } while (current_type != null);
 308
 309                         ConstructorInfo[] result = new ConstructorInfo [l.Count];
 310                         l.CopyTo (result);
 311                         return result;
 312                 }
 313
 314                 ConstructorInfo[] GetConstructorsInternal (BindingFlags bf, MonoGenericClass reftype)
 315                 {
 316                         if (generic_type.ctors == null)
 317                                 return new ConstructorInfo [0];
 318
 319                         ArrayList l = new ArrayList ();
 320                         bool match;
 321                         MethodAttributes mattrs;
 322
 323                         initialize ();
 324
 325                         for (int i = 0; i < generic_type.ctors.Length; i++) {
 326                                 ConstructorInfo c = generic_type.ctors [i];
 327
 328                                 match = false;
 329                                 mattrs = c.Attributes;
 330                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 331                                         if ((bf & BindingFlags.Public) != 0)
 332                                                 match = true;
 333                                 } else {
 334                                         if ((bf & BindingFlags.NonPublic) != 0)
 335                                                 match = true;
 336                                 }
 337                                 if (!match)
 338                                         continue;
 339                                 match = false;
 340                                 if ((mattrs & MethodAttributes.Static) != 0) {
 341                                         if ((bf & BindingFlags.Static) != 0)
 342                                                 match = true;
 343                                 } else {
 344                                         if ((bf & BindingFlags.Instance) != 0)
 345                                                 match = true;
 346                                 }
 347                                 if (!match)
 348                                         continue;
 349                                 l.Add (TypeBuilder.GetConstructor (this, c));
 350                         }
 351
 352                         ConstructorInfo[] result = new ConstructorInfo [l.Count];
 353                         l.CopyTo (result);
 354                         return result;
 355                 }
 356
 357                 public override FieldInfo[] GetFields (BindingFlags bf)
 358                 {
 359                         if (!generic_type.IsCompilerContext)
 360                                 throw new NotSupportedException ();
 361
 362                         ArrayList l = new ArrayList ();
 363
 364                         Type current_type = this;
 365                         do {
 366                                 MonoGenericClass gi = current_type as MonoGenericClass;
 367                                 if (gi != null)
 368                                         l.AddRange (gi.GetFieldsInternal (bf, this));
 369                                 else if (current_type is TypeBuilder)
 370                                         l.AddRange (current_type.GetFields (bf));
 371                                 else {
 372                                         MonoType mt = (MonoType) current_type;
 373                                         l.AddRange (mt.GetFields_internal (bf, this));
 374                                         break;
 375                                 }
 376
 377                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 378                                         break;
 379                                 current_type = current_type.BaseType;
 380                         } while (current_type != null);
 381
 382                         FieldInfo[] result = new FieldInfo [l.Count];
 383                         l.CopyTo (result);
 384                         return result;
 385                 }
 386
 387                 FieldInfo[] GetFieldsInternal (BindingFlags bf, MonoGenericClass reftype)
 388                 {
 389                         if (generic_type.num_fields == 0)
 390                                 return new FieldInfo [0];
 391
 392                         ArrayList l = new ArrayList ();
 393                         bool match;
 394                         FieldAttributes fattrs;
 395
 396                         initialize ();
 397
 398                         for (int i = 0; i < generic_type.num_fields; i++) {
 399                                 FieldInfo c = generic_type.fields [i];
 400
 401                                 match = false;
 402                                 fattrs = c.Attributes;
 403                                 if ((fattrs & FieldAttributes.FieldAccessMask) == FieldAttributes.Public) {
 404                                         if ((bf & BindingFlags.Public) != 0)
 405                                                 match = true;
 406                                 } else {
 407                                         if ((bf & BindingFlags.NonPublic) != 0)
 408                                                 match = true;
 409                                 }
 410                                 if (!match)
 411                                         continue;
 412                                 match = false;
 413                                 if ((fattrs & FieldAttributes.Static) != 0) {
 414                                         if ((bf & BindingFlags.Static) != 0)
 415                                                 match = true;
 416                                 } else {
 417                                         if ((bf & BindingFlags.Instance) != 0)
 418                                                 match = true;
 419                                 }
 420                                 if (!match)
 421                                         continue;
 422                                 l.Add (TypeBuilder.GetField (this, c));
 423                         }
 424
 425                         FieldInfo[] result = new FieldInfo [l.Count];
 426                         l.CopyTo (result);
 427                         return result;
 428                 }
 429
 430                 public override PropertyInfo[] GetProperties (BindingFlags bf)
 431                 {
 432                         if (!generic_type.IsCompilerContext)
 433                                 throw new NotSupportedException ();
 434
 435                         ArrayList l = new ArrayList ();
 436
 437                         Type current_type = this;
 438                         do {
 439                                 MonoGenericClass gi = current_type as MonoGenericClass;
 440                                 if (gi != null)
 441                                         l.AddRange (gi.GetPropertiesInternal (bf, this));
 442                                 else if (current_type is TypeBuilder)
 443                                         l.AddRange (current_type.GetProperties (bf));
 444                                 else {
 445                                         MonoType mt = (MonoType) current_type;
 446                                         l.AddRange (mt.GetPropertiesByName (null, bf, false, this));
 447                                         break;
 448                                 }
 449
 450                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 451                                         break;
 452                                 current_type = current_type.BaseType;
 453                         } while (current_type != null);
 454
 455                         PropertyInfo[] result = new PropertyInfo [l.Count];
 456                         l.CopyTo (result);
 457                         return result;
 458                 }
 459
 460                 PropertyInfo[] GetPropertiesInternal (BindingFlags bf, MonoGenericClass reftype)
 461                 {
 462                         if (generic_type.properties == null)
 463                                 return new PropertyInfo [0];
 464
 465                         ArrayList l = new ArrayList ();
 466                         bool match;
 467                         MethodAttributes mattrs;
 468                         MethodInfo accessor;
 469
 470                         initialize ();
 471
 472                         foreach (PropertyInfo pinfo in generic_type.properties) {
 473                                 match = false;
 474                                 accessor = pinfo.GetGetMethod (true);
 475                                 if (accessor == null)
 476                                         accessor = pinfo.GetSetMethod (true);
 477                                 if (accessor == null)
 478                                         continue;
 479                                 mattrs = accessor.Attributes;
 480                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 481                                         if ((bf & BindingFlags.Public) != 0)
 482                                                 match = true;
 483                                 } else {
 484                                         if ((bf & BindingFlags.NonPublic) != 0)
 485                                                 match = true;
 486                                 }
 487                                 if (!match)
 488                                         continue;
 489                                 match = false;
 490                                 if ((mattrs & MethodAttributes.Static) != 0) {
 491                                         if ((bf & BindingFlags.Static) != 0)
 492                                                 match = true;
 493                                 } else {
 494                                         if ((bf & BindingFlags.Instance) != 0)
 495                                                 match = true;
 496                                 }
 497                                 if (!match)
 498                                         continue;
 499                                 l.Add (new PropertyOnTypeBuilderInst (reftype, pinfo));
 500                         }
 501                         PropertyInfo[] result = new PropertyInfo [l.Count];
 502                         l.CopyTo (result);
 503                         return result;
 504                 }
 505
 506                 public override EventInfo[] GetEvents (BindingFlags bf)
 507                 {
 508                         if (!generic_type.IsCompilerContext)
 509                                 throw new NotSupportedException ();
 510
 511                         ArrayList l = new ArrayList ();
 512
 513                         Type current_type = this;
 514                         do {
 515                                 MonoGenericClass gi = current_type as MonoGenericClass;
 516                                 if (gi != null)
 517                                         l.AddRange (gi.GetEvents_impl (bf, this));
 518                                 else if (current_type is TypeBuilder)
 519                                         l.AddRange (current_type.GetEvents (bf));
 520                                 else {
 521                                         MonoType mt = (MonoType) current_type;
 522                                         l.AddRange (mt.GetEvents (bf));
 523                                         break;
 524                                 }
 525
 526                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 527                                         break;
 528                                 current_type = current_type.BaseType;
 529                         } while (current_type != null);
 530
 531                         EventInfo[] result = new EventInfo [l.Count];
 532                         l.CopyTo (result);
 533                         return result;
 534                 }
 535
 536                 protected EventInfo[] GetEvents_impl (BindingFlags bf, Type reftype)
 537                 {
 538                         ArrayList l = new ArrayList ();
 539                         bool match;
 540                         MethodAttributes mattrs;
 541                         MethodInfo accessor;
 542
 543                         initialize ();
 544
 545                         EventInfo[] events = GetEvents_internal (reftype);
 546
 547                         for (int i = 0; i < events.Length; i++) {
 548                                 EventInfo c = events [i];
 549
 550                                 match = false;
 551                                 accessor = c.GetAddMethod (true);
 552                                 if (accessor == null)
 553                                         accessor = c.GetRemoveMethod (true);
 554                                 if (accessor == null)
 555                                         continue;
 556                                 mattrs = accessor.Attributes;
 557                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 558                                         if ((bf & BindingFlags.Public) != 0)
 559                                                 match = true;
 560                                 } else {
 561                                         if ((bf & BindingFlags.NonPublic) != 0)
 562                                                 match = true;
 563                                 }
 564                                 if (!match)
 565                                         continue;
 566                                 match = false;
 567                                 if ((mattrs & MethodAttributes.Static) != 0) {
 568                                         if ((bf & BindingFlags.Static) != 0)
 569                                                 match = true;
 570                                 } else {
 571                                         if ((bf & BindingFlags.Instance) != 0)
 572                                                 match = true;
 573                                 }
 574                                 if (!match)
 575                                         continue;
 576                                 l.Add (c);
 577                         }
 578                         EventInfo[] result = new EventInfo [l.Count];
 579                         l.CopyTo (result);
 580                         return result;
 581                 }
 582
 583                 public override Type[] GetNestedTypes (BindingFlags bf)
 584                 {
 585                         return generic_type.GetNestedTypes (bf);
 586                 }
 587
 588                 public override bool IsAssignableFrom (Type c)
 589                 {
 590                         if (c == this)
 591                                 return true;
 592
 593                         Type[] interfaces = GetInterfacesInternal ();
 594
 595                         if (c.IsInterface) {
 596                                 if (interfaces == null)
 597                                         return false;
 598                                 foreach (Type t in interfaces)
 599                                         if (c.IsAssignableFrom (t))
 600                                                 return true;
 601                                 return false;
 602                         }
 603
 604                         Type parent = GetParentType ();
 605                         if (parent == null)
 606                                 return c == typeof (object);
 607                         else
 608                                 return c.IsAssignableFrom (parent);
 609                 }
 610         }
 611 }
 612
 613 #endif