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                 int event_count;
  62
  63                 internal MonoGenericClass ()
  64                         : base (null)
  65                 {
  66                         // this should not be used
  67                         throw new InvalidOperationException ();
  68                 }
  69
  70                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  71                 extern void initialize (MethodInfo[] methods, ConstructorInfo[] ctors, FieldInfo[] fields, PropertyInfo[] properties, EventInfo[] events);
  72
  73                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  74                 extern MethodInfo GetCorrespondingInflatedMethod (MethodInfo generic);
  75
  76                 private const BindingFlags flags = BindingFlags.Public | BindingFlags.NonPublic |
  77                 BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
  78
  79                 void initialize ()
  80                 {
  81                         if (initialized)
  82                                 return;
  83
  84                         MonoGenericClass parent = GetParentType () as MonoGenericClass;
  85                         if (parent != null)
  86                                 parent.initialize ();
  87
  88                         EventInfo[] events = generic_type.GetEvents_internal (flags);
  89                         event_count = events.Length;
  90
  91                         initialize (generic_type.GetMethods (flags),
  92                                                 generic_type.GetConstructors (flags),
  93                                                 generic_type.GetFields (flags),
  94                                                 generic_type.GetProperties (flags),
  95                                                 events);
  96
  97                         initialized = true;
  98                 }
  99
 100                 Type GetParentType ()
 101                 {
 102                         return InflateType (generic_type.BaseType);
 103                 }
 104
 105                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 106                 private extern Type InflateType_internal (Type type);
 107
 108                 internal Type InflateType (Type type)
 109                 {
 110                         if (type == null)
 111                                 return null;
 112                         if (!type.IsGenericParameter && !type.ContainsGenericParameters)
 113                                 return type;
 114                         return InflateType_internal (type);
 115                 }
 116
 117                 public override Type BaseType {
 118                         get {
 119                                 Type parent = GetParentType ();
 120                                 return parent != null ? parent : generic_type.BaseType;
 121                         }
 122                 }
 123
 124                 Type[] GetInterfacesInternal ()
 125                 {
 126                         if (generic_type.interfaces == null)
 127                                 return new Type [0];
 128                         Type[] res = new Type [generic_type.interfaces.Length];
 129                         for (int i = 0; i < res.Length; ++i)
 130                                 res [i] = InflateType (generic_type.interfaces [i]);
 131                         return res;
 132                 }
 133
 134                 public override Type[] GetInterfaces ()
 135                 {
 136                         if (!generic_type.IsCompilerContext)
 137                                 throw new NotSupportedException ();
 138                         return GetInterfacesInternal ();
 139                 }
 140
 141                 protected override bool IsValueTypeImpl ()
 142                 {
 143                         return generic_type.IsValueType;
 144                 }
 145
 146                 internal override MethodInfo GetMethod (MethodInfo fromNoninstanciated)
 147                 {
 148                         initialize ();
 149
 150                         if (!(fromNoninstanciated is MethodBuilder))
 151                                 throw new InvalidOperationException ("Inflating non MethodBuilder objects is not supported: " + fromNoninstanciated.GetType ());
 152
 153                         if (fromNoninstanciated is MethodBuilder) {
 154                                 MethodBuilder mb = (MethodBuilder)fromNoninstanciated;
 155
 156                                 // FIXME: We can't yet handle creating generic instantiations of
 157                                 // MethodOnTypeBuilderInst objects
 158                                 // Also, mono_image_get_method_on_inst_token () can't handle generic
 159                                 // methods
 160                                 if (!mb.IsGenericMethodDefinition) {
 161                                         if (methods == null)
 162                                                 methods = new Hashtable ();
 163                                         if (!methods.ContainsKey (mb))
 164                                                 methods [mb] = new MethodOnTypeBuilderInst (this, mb);
 165                                         return (MethodInfo)methods [mb];
 166                                 }
 167                         }
 168
 169                         return GetCorrespondingInflatedMethod (fromNoninstanciated);
 170                 }
 171
 172                 internal override ConstructorInfo GetConstructor (ConstructorInfo fromNoninstanciated)
 173                 {
 174                         initialize ();
 175
 176                         if (!(fromNoninstanciated is ConstructorBuilder))
 177                                 throw new InvalidOperationException ("Inflating non ConstructorBuilder objects is not supported: " + fromNoninstanciated.GetType ());
 178
 179                         ConstructorBuilder cb = (ConstructorBuilder)fromNoninstanciated;
 180                         if (ctors == null)
 181                                 ctors = new Hashtable ();
 182                         if (!ctors.ContainsKey (cb))
 183                                 ctors [cb] = new ConstructorOnTypeBuilderInst (this, cb);
 184                         return (ConstructorInfo)ctors [cb];
 185                 }
 186
 187                 internal override FieldInfo GetField (FieldInfo fromNoninstanciated)
 188                 {
 189                         initialize ();
 190
 191                         if (fromNoninstanciated is FieldOnTypeBuilderInst && generic_type.IsCompilerContext) {
 192                                 FieldOnTypeBuilderInst finst = (FieldOnTypeBuilderInst)fromNoninstanciated;
 193                                 fromNoninstanciated = finst.fb;
 194                         }
 195
 196                         if (!(fromNoninstanciated is FieldBuilder))
 197                                 throw new InvalidOperationException ("Inflating non FieldBuilder objects is not supported: " + fromNoninstanciated.GetType ());
 198
 199                         FieldBuilder fb = (FieldBuilder)fromNoninstanciated;
 200                         if (fields == null)
 201                                 fields = new Hashtable ();
 202                         if (!fields.ContainsKey (fb))
 203                                 fields [fb] = new FieldOnTypeBuilderInst (this, fb);
 204                         return (FieldInfo)fields [fb];
 205                 }
 206
 207                 public override MethodInfo[] GetMethods (BindingFlags bf)
 208                 {
 209                         if (!generic_type.IsCompilerContext)
 210                                 throw new NotSupportedException ();
 211
 212                         ArrayList l = new ArrayList ();
 213
 214                         //
 215                         // Walk up our class hierarchy and retrieve methods from our
 216                         // parent classes.
 217                         //
 218
 219                         Type current_type = this;
 220                         do {
 221                                 MonoGenericClass gi = current_type as MonoGenericClass;
 222                                 if (gi != null)
 223                                         l.AddRange (gi.GetMethodsInternal (bf, this));
 224                                 else if (current_type is TypeBuilder)
 225                                         l.AddRange (current_type.GetMethods (bf));
 226                                 else {
 227                                         // If we encounter a `MonoType', its
 228                                         // GetMethodsByName() will return all the methods
 229                                         // from its parent type(s), so we can stop here.
 230                                         MonoType mt = (MonoType) current_type;
 231                                         l.AddRange (mt.GetMethodsByName (null, bf, false, this));
 232                                         break;
 233                                 }
 234
 235                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 236                                         break;
 237                                 current_type = current_type.BaseType;
 238                         } while (current_type != null);
 239
 240                         MethodInfo[] result = new MethodInfo [l.Count];
 241                         l.CopyTo (result);
 242                         return result;
 243                 }
 244
 245                 MethodInfo[] GetMethodsInternal (BindingFlags bf, MonoGenericClass reftype)
 246                 {
 247                         if (generic_type.num_methods == 0)
 248                                 return new MethodInfo [0];
 249
 250                         ArrayList l = new ArrayList ();
 251                         bool match;
 252                         MethodAttributes mattrs;
 253                         MethodInfo accessor;
 254
 255                         initialize ();
 256
 257                         for (int i = 0; i < generic_type.num_methods; ++i) {
 258                                 MethodInfo c = generic_type.methods [i];
 259
 260                                 match = false;
 261                                 mattrs = c.Attributes;
 262                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 263                                         if ((bf & BindingFlags.Public) != 0)
 264                                                 match = true;
 265                                 } else {
 266                                         if ((bf & BindingFlags.NonPublic) != 0)
 267                                                 match = true;
 268                                 }
 269                                 if (!match)
 270                                         continue;
 271                                 match = false;
 272                                 if ((mattrs & MethodAttributes.Static) != 0) {
 273                                         if ((bf & BindingFlags.Static) != 0)
 274                                                 match = true;
 275                                 } else {
 276                                         if ((bf & BindingFlags.Instance) != 0)
 277                                                 match = true;
 278                                 }
 279                                 if (!match)
 280                                         continue;
 281                                 c = TypeBuilder.GetMethod (this, c);
 282                                 l.Add (c);
 283                         }
 284
 285                         MethodInfo[] result = new MethodInfo [l.Count];
 286                         l.CopyTo (result);
 287                         return result;
 288                 }
 289
 290                 public override ConstructorInfo[] GetConstructors (BindingFlags bf)
 291                 {
 292                         if (!generic_type.IsCompilerContext)
 293                                 throw new NotSupportedException ();
 294
 295                         ArrayList l = new ArrayList ();
 296
 297                         Type current_type = this;
 298                         do {
 299                                 MonoGenericClass gi = current_type as MonoGenericClass;
 300                                 if (gi != null)
 301                                         l.AddRange (gi.GetConstructorsInternal (bf, this));
 302                                 else if (current_type is TypeBuilder)
 303                                         l.AddRange (current_type.GetConstructors (bf));
 304                                 else {
 305                                         MonoType mt = (MonoType) current_type;
 306                                         l.AddRange (mt.GetConstructors_internal (bf, this));
 307                                         break;
 308                                 }
 309
 310                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 311                                         break;
 312                                 current_type = current_type.BaseType;
 313                         } while (current_type != null);
 314
 315                         ConstructorInfo[] result = new ConstructorInfo [l.Count];
 316                         l.CopyTo (result);
 317                         return result;
 318                 }
 319
 320                 ConstructorInfo[] GetConstructorsInternal (BindingFlags bf, MonoGenericClass reftype)
 321                 {
 322                         if (generic_type.ctors == null)
 323                                 return new ConstructorInfo [0];
 324
 325                         ArrayList l = new ArrayList ();
 326                         bool match;
 327                         MethodAttributes mattrs;
 328
 329                         initialize ();
 330
 331                         for (int i = 0; i < generic_type.ctors.Length; i++) {
 332                                 ConstructorInfo c = generic_type.ctors [i];
 333
 334                                 match = false;
 335                                 mattrs = c.Attributes;
 336                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 337                                         if ((bf & BindingFlags.Public) != 0)
 338                                                 match = true;
 339                                 } else {
 340                                         if ((bf & BindingFlags.NonPublic) != 0)
 341                                                 match = true;
 342                                 }
 343                                 if (!match)
 344                                         continue;
 345                                 match = false;
 346                                 if ((mattrs & MethodAttributes.Static) != 0) {
 347                                         if ((bf & BindingFlags.Static) != 0)
 348                                                 match = true;
 349                                 } else {
 350                                         if ((bf & BindingFlags.Instance) != 0)
 351                                                 match = true;
 352                                 }
 353                                 if (!match)
 354                                         continue;
 355                                 l.Add (TypeBuilder.GetConstructor (this, c));
 356                         }
 357
 358                         ConstructorInfo[] result = new ConstructorInfo [l.Count];
 359                         l.CopyTo (result);
 360                         return result;
 361                 }
 362
 363                 public override FieldInfo[] GetFields (BindingFlags bf)
 364                 {
 365                         if (!generic_type.IsCompilerContext)
 366                                 throw new NotSupportedException ();
 367
 368                         ArrayList l = new ArrayList ();
 369
 370                         Type current_type = this;
 371                         do {
 372                                 MonoGenericClass gi = current_type as MonoGenericClass;
 373                                 if (gi != null)
 374                                         l.AddRange (gi.GetFieldsInternal (bf, this));
 375                                 else if (current_type is TypeBuilder)
 376                                         l.AddRange (current_type.GetFields (bf));
 377                                 else {
 378                                         MonoType mt = (MonoType) current_type;
 379                                         l.AddRange (mt.GetFields_internal (bf, this));
 380                                         break;
 381                                 }
 382
 383                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 384                                         break;
 385                                 current_type = current_type.BaseType;
 386                         } while (current_type != null);
 387
 388                         FieldInfo[] result = new FieldInfo [l.Count];
 389                         l.CopyTo (result);
 390                         return result;
 391                 }
 392
 393                 FieldInfo[] GetFieldsInternal (BindingFlags bf, MonoGenericClass reftype)
 394                 {
 395                         if (generic_type.num_fields == 0)
 396                                 return new FieldInfo [0];
 397
 398                         ArrayList l = new ArrayList ();
 399                         bool match;
 400                         FieldAttributes fattrs;
 401
 402                         initialize ();
 403
 404                         for (int i = 0; i < generic_type.num_fields; i++) {
 405                                 FieldInfo c = generic_type.fields [i];
 406
 407                                 match = false;
 408                                 fattrs = c.Attributes;
 409                                 if ((fattrs & FieldAttributes.FieldAccessMask) == FieldAttributes.Public) {
 410                                         if ((bf & BindingFlags.Public) != 0)
 411                                                 match = true;
 412                                 } else {
 413                                         if ((bf & BindingFlags.NonPublic) != 0)
 414                                                 match = true;
 415                                 }
 416                                 if (!match)
 417                                         continue;
 418                                 match = false;
 419                                 if ((fattrs & FieldAttributes.Static) != 0) {
 420                                         if ((bf & BindingFlags.Static) != 0)
 421                                                 match = true;
 422                                 } else {
 423                                         if ((bf & BindingFlags.Instance) != 0)
 424                                                 match = true;
 425                                 }
 426                                 if (!match)
 427                                         continue;
 428                                 l.Add (TypeBuilder.GetField (this, c));
 429                         }
 430
 431                         FieldInfo[] result = new FieldInfo [l.Count];
 432                         l.CopyTo (result);
 433                         return result;
 434                 }
 435
 436                 public override PropertyInfo[] GetProperties (BindingFlags bf)
 437                 {
 438                         if (!generic_type.IsCompilerContext)
 439                                 throw new NotSupportedException ();
 440
 441                         ArrayList l = new ArrayList ();
 442
 443                         Type current_type = this;
 444                         do {
 445                                 MonoGenericClass gi = current_type as MonoGenericClass;
 446                                 if (gi != null)
 447                                         l.AddRange (gi.GetPropertiesInternal (bf, this));
 448                                 else if (current_type is TypeBuilder)
 449                                         l.AddRange (current_type.GetProperties (bf));
 450                                 else {
 451                                         MonoType mt = (MonoType) current_type;
 452                                         l.AddRange (mt.GetPropertiesByName (null, bf, false, this));
 453                                         break;
 454                                 }
 455
 456                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 457                                         break;
 458                                 current_type = current_type.BaseType;
 459                         } while (current_type != null);
 460
 461                         PropertyInfo[] result = new PropertyInfo [l.Count];
 462                         l.CopyTo (result);
 463                         return result;
 464                 }
 465
 466                 PropertyInfo[] GetPropertiesInternal (BindingFlags bf, MonoGenericClass reftype)
 467                 {
 468                         if (generic_type.properties == null)
 469                                 return new PropertyInfo [0];
 470
 471                         ArrayList l = new ArrayList ();
 472                         bool match;
 473                         MethodAttributes mattrs;
 474                         MethodInfo accessor;
 475
 476                         initialize ();
 477
 478                         foreach (PropertyInfo pinfo in generic_type.properties) {
 479                                 match = false;
 480                                 accessor = pinfo.GetGetMethod (true);
 481                                 if (accessor == null)
 482                                         accessor = pinfo.GetSetMethod (true);
 483                                 if (accessor == null)
 484                                         continue;
 485                                 mattrs = accessor.Attributes;
 486                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 487                                         if ((bf & BindingFlags.Public) != 0)
 488                                                 match = true;
 489                                 } else {
 490                                         if ((bf & BindingFlags.NonPublic) != 0)
 491                                                 match = true;
 492                                 }
 493                                 if (!match)
 494                                         continue;
 495                                 match = false;
 496                                 if ((mattrs & MethodAttributes.Static) != 0) {
 497                                         if ((bf & BindingFlags.Static) != 0)
 498                                                 match = true;
 499                                 } else {
 500                                         if ((bf & BindingFlags.Instance) != 0)
 501                                                 match = true;
 502                                 }
 503                                 if (!match)
 504                                         continue;
 505                                 l.Add (new PropertyOnTypeBuilderInst (reftype, pinfo));
 506                         }
 507                         PropertyInfo[] result = new PropertyInfo [l.Count];
 508                         l.CopyTo (result);
 509                         return result;
 510                 }
 511
 512                 public override EventInfo[] GetEvents (BindingFlags bf)
 513                 {
 514                         if (!generic_type.IsCompilerContext)
 515                                 throw new NotSupportedException ();
 516
 517                         ArrayList l = new ArrayList ();
 518
 519                         Type current_type = this;
 520                         do {
 521                                 MonoGenericClass gi = current_type as MonoGenericClass;
 522                                 if (gi != null)
 523                                         l.AddRange (gi.GetEventsInternal (bf, this));
 524                                 else if (current_type is TypeBuilder)
 525                                         l.AddRange (current_type.GetEvents (bf));
 526                                 else {
 527                                         MonoType mt = (MonoType) current_type;
 528                                         l.AddRange (mt.GetEvents (bf));
 529                                         break;
 530                                 }
 531
 532                                 if ((bf & BindingFlags.DeclaredOnly) != 0)
 533                                         break;
 534                                 current_type = current_type.BaseType;
 535                         } while (current_type != null);
 536
 537                         EventInfo[] result = new EventInfo [l.Count];
 538                         l.CopyTo (result);
 539                         return result;
 540                 }
 541
 542                 EventInfo[] GetEventsInternal (BindingFlags bf, MonoGenericClass reftype) {
 543                         if (generic_type.events == null)
 544                                 return new EventInfo [0];
 545
 546                         initialize ();
 547
 548                         ArrayList l = new ArrayList ();
 549                         bool match;
 550                         MethodAttributes mattrs;
 551                         MethodInfo accessor;
 552
 553                         for (int i = 0; i < event_count; ++i) {
 554                                 EventBuilder ev = generic_type.events [i];
 555
 556                                 match = false;
 557                                 accessor = ev.add_method;
 558                                 if (accessor == null)
 559                                         accessor = ev.remove_method;
 560                                 if (accessor == null)
 561                                         continue;
 562                                 mattrs = accessor.Attributes;
 563                                 if ((mattrs & MethodAttributes.MemberAccessMask) == MethodAttributes.Public) {
 564                                         if ((bf & BindingFlags.Public) != 0)
 565                                                 match = true;
 566                                 } else {
 567                                         if ((bf & BindingFlags.NonPublic) != 0)
 568                                                 match = true;
 569                                 }
 570                                 if (!match)
 571                                         continue;
 572                                 match = false;
 573                                 if ((mattrs & MethodAttributes.Static) != 0) {
 574                                         if ((bf & BindingFlags.Static) != 0)
 575                                                 match = true;
 576                                 } else {
 577                                         if ((bf & BindingFlags.Instance) != 0)
 578                                                 match = true;
 579                                 }
 580                                 if (!match)
 581                                         continue;
 582                                 l.Add (new EventOnTypeBuilderInst (reftype, ev));
 583                         }
 584                         EventInfo[] result = new EventInfo [l.Count];
 585                         l.CopyTo (result);
 586                         return result;
 587                 }
 588
 589                 public override Type[] GetNestedTypes (BindingFlags bf)
 590                 {
 591                         return generic_type.GetNestedTypes (bf);
 592                 }
 593
 594                 public override bool IsAssignableFrom (Type c)
 595                 {
 596                         if (c == this)
 597                                 return true;
 598
 599                         Type[] interfaces = GetInterfacesInternal ();
 600
 601                         if (c.IsInterface) {
 602                                 if (interfaces == null)
 603                                         return false;
 604                                 foreach (Type t in interfaces)
 605                                         if (c.IsAssignableFrom (t))
 606                                                 return true;
 607                                 return false;
 608                         }
 609
 610                         Type parent = GetParentType ();
 611                         if (parent == null)
 612                                 return c == typeof (object);
 613                         else
 614                                 return c.IsAssignableFrom (parent);
 615                 }
 616         }
 617 }
 618
 619 #endif