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

   1 //
   2 // System.Reflection/MethodBase.cs
   3 //
   4 // Author:
   5 //   Paolo Molaro (lupus@ximian.com)
   6 //
   7 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 // Copyright 2011 Xamarin Inc (http://www.xamarin.com).
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Diagnostics;
  32 using System.Globalization;
  33 #if !FULL_AOT_RUNTIME
  34 using System.Reflection.Emit;
  35 #endif
  36 using System.Runtime.CompilerServices;
  37 using System.Runtime.InteropServices;
  38
  39 namespace System.Reflection {
  40
  41         [ComVisible (true)]
  42         [ComDefaultInterfaceAttribute (typeof (_MethodBase))]
  43         [Serializable]
  44         [ClassInterface(ClassInterfaceType.None)]
  45 #if MOBILE
  46         public abstract class MethodBase: MemberInfo {
  47 #else
  48         public abstract class MethodBase: MemberInfo, _MethodBase {
  49 #endif
  50                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  51                 public extern static MethodBase GetCurrentMethod ();
  52
  53                 internal static MethodBase GetMethodFromHandleNoGenericCheck (RuntimeMethodHandle handle)
  54                 {
  55                         return GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  56                 }
  57
  58                 static MethodBase GetMethodFromIntPtr (IntPtr handle, IntPtr declaringType)
  59                 {
  60                         if (handle == IntPtr.Zero)
  61                                 throw new ArgumentException ("The handle is invalid.");
  62                         MethodBase res = GetMethodFromHandleInternalType (handle, declaringType);
  63                         if (res == null)
  64                                 throw new ArgumentException ("The handle is invalid.");
  65                         return res;
  66                 }
  67
  68                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle)
  69                 {
  70                         MethodBase res = GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  71                         Type t = res.DeclaringType;
  72                         if (t.IsGenericType || t.IsGenericTypeDefinition)
  73                                 throw new ArgumentException ("Cannot resolve method because it's declared in a generic class.");
  74                         return res;
  75                 }
  76
  77                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  78                 private extern static MethodBase GetMethodFromHandleInternalType (IntPtr method_handle, IntPtr type_handle);
  79
  80                 [ComVisible (false)]
  81                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle, RuntimeTypeHandle declaringType)
  82                 {
  83                         return GetMethodFromIntPtr (handle.Value, declaringType.Value);
  84                 }
  85
  86                 public abstract MethodImplAttributes GetMethodImplementationFlags();
  87
  88                 public abstract ParameterInfo[] GetParameters();
  89
  90                 //
  91                 // This is a quick version for our own use. We should override
  92                 // it where possible so that it does not allocate an array.
  93                 // They cannot be abstract otherwise we break public contract
  94                 //
  95                 internal virtual ParameterInfo[] GetParametersInternal ()
  96                 {
  97                         // Override me
  98                         return GetParameters ();
  99                 }
 100
 101                 internal virtual int GetParametersCount ()
 102                 {
 103                         // Override me
 104                         return GetParametersInternal ().Length;
 105                 }
 106
 107                 internal virtual Type GetParameterType (int pos) {
 108                         throw new NotImplementedException ();
 109                 }
 110
 111                 [DebuggerHidden]
 112                 [DebuggerStepThrough]
 113                 public Object Invoke(Object obj, Object[] parameters) {
 114                         return Invoke (obj, 0, null, parameters, null);
 115                 }
 116
 117                 public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);
 118
 119                 protected MethodBase()
 120                 {
 121                 }
 122
 123                 public abstract RuntimeMethodHandle MethodHandle { get; }
 124                 public abstract MethodAttributes Attributes { get; }
 125                 public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
 126                 public Boolean IsPublic {
 127                         get {
 128                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
 129                         }
 130                 }
 131                 public Boolean IsPrivate {
 132                         get {
 133                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
 134                         }
 135                 }
 136                 public Boolean IsFamily {
 137                         get {
 138                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
 139                         }
 140                 }
 141                 public Boolean IsAssembly {
 142                         get {
 143                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
 144                         }
 145                 }
 146                 public Boolean IsFamilyAndAssembly {
 147                         get {
 148                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
 149                         }
 150                 }
 151                 public Boolean IsFamilyOrAssembly {
 152                         get {
 153                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
 154                         }
 155                 }
 156                 public Boolean IsStatic {
 157                         get {
 158                                 return (Attributes & MethodAttributes.Static) != 0;
 159                         }
 160                 }
 161                 public Boolean IsFinal {
 162                         get {
 163                                 return (Attributes & MethodAttributes.Final) != 0;
 164                         }
 165                 }
 166                 public Boolean IsVirtual {
 167                         get {
 168                                 return (Attributes & MethodAttributes.Virtual) != 0;
 169                         }
 170                 }
 171                 public Boolean IsHideBySig {
 172                         get {
 173                                 return (Attributes & MethodAttributes.HideBySig) != 0;
 174                         }
 175                 }
 176                 public Boolean IsAbstract {
 177                         get {
 178                                 return (Attributes & MethodAttributes.Abstract) != 0;
 179                         }
 180                 }
 181                 public Boolean IsSpecialName {
 182                         get {
 183                                 int attr = (int)Attributes;
 184                                 return (attr & (int)MethodAttributes.SpecialName) != 0;
 185                         }
 186                 }
 187                 [ComVisibleAttribute (true)]
 188                 public Boolean IsConstructor {
 189                         get {
 190                                 int attr = (int)Attributes;
 191                                 return ((attr & (int)MethodAttributes.RTSpecialName) != 0
 192                                         && (Name == ".ctor"));
 193                         }
 194                 }
 195
 196                 internal virtual int get_next_table_index (object obj, int table, bool inc) {
 197 #if !FULL_AOT_RUNTIME
 198                         if (this is MethodBuilder) {
 199                                 MethodBuilder mb = (MethodBuilder)this;
 200                                 return mb.get_next_table_index (obj, table, inc);
 201                         }
 202                         if (this is ConstructorBuilder) {
 203                                 ConstructorBuilder mb = (ConstructorBuilder)this;
 204                                 return mb.get_next_table_index (obj, table, inc);
 205                         }
 206 #endif
 207                         throw new Exception ("Method is not a builder method");
 208                 }
 209
 210                 [ComVisible (true)]
 211                 public virtual Type [] GetGenericArguments ()
 212                 {
 213                         throw new NotSupportedException ();
 214                 }
 215
 216                 public virtual bool ContainsGenericParameters {
 217                         get {
 218                                 return false;
 219                         }
 220                 }
 221
 222                 public virtual bool IsGenericMethodDefinition {
 223                         get {
 224                                 return false;
 225                         }
 226                 }
 227
 228                 public virtual bool IsGenericMethod {
 229                         get {
 230                                 return false;
 231                         }
 232                 }
 233
 234                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 235                 internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);
 236
 237                 internal static MethodBody GetMethodBody (IntPtr handle) {
 238                         return GetMethodBodyInternal (handle);
 239                 }
 240
 241                 public virtual MethodBody GetMethodBody () {
 242                         throw new NotSupportedException ();
 243                 }
 244
 245 #if NET_4_0
 246                 public override bool Equals (object obj)
 247                 {
 248                         return obj == (object) this;
 249                 }
 250
 251                 public override int GetHashCode ()
 252                 {
 253                         return base.GetHashCode ();
 254                 }
 255
 256                 public static bool operator == (MethodBase left, MethodBase right)
 257                 {
 258                         if ((object)left == (object)right)
 259                                 return true;
 260                         if ((object)left == null ^ (object)right == null)
 261                                 return false;
 262                         return left.Equals (right);
 263                 }
 264
 265                 public static bool operator != (MethodBase left, MethodBase right)
 266                 {
 267                         if ((object)left == (object)right)
 268                                 return false;
 269                         if ((object)left == null ^ (object)right == null)
 270                                 return true;
 271                         return !left.Equals (right);
 272                 }
 273
 274                 public virtual bool IsSecurityCritical {
 275                         get {
 276                                 throw new NotImplementedException ();
 277                         }
 278                 }
 279
 280                 public virtual bool IsSecuritySafeCritical {
 281                         get {
 282                                 throw new NotImplementedException ();
 283                         }
 284                 }
 285
 286                 public virtual bool IsSecurityTransparent {
 287                         get {
 288                                 throw new NotImplementedException ();
 289                         }
 290                 }
 291 #endif
 292
 293 #if !MOBILE
 294                 void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 295                 {
 296                         throw new NotImplementedException ();
 297                 }
 298
 299                 Type _MethodBase.GetType ()
 300                 {
 301                         // Required or object::GetType becomes virtual final
 302                         return base.GetType ();
 303                 }
 304
 305                 void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 306                 {
 307                         throw new NotImplementedException ();
 308                 }
 309
 310                 void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
 311                 {
 312                         throw new NotImplementedException ();
 313                 }
 314
 315                 void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 316                 {
 317                         throw new NotImplementedException ();
 318                 }
 319 #endif
 320         }
 321 }