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                 //
  94                 internal abstract ParameterInfo[] GetParametersInternal ();
  95                 internal abstract int GetParametersCount ();
  96
  97                 internal virtual Type GetParameterType (int pos) {
  98                         throw new NotImplementedException ();
  99                 }
 100
 101                 [DebuggerHidden]
 102                 [DebuggerStepThrough]
 103                 public Object Invoke(Object obj, Object[] parameters) {
 104                         return Invoke (obj, 0, null, parameters, null);
 105                 }
 106
 107                 public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);
 108
 109                 protected MethodBase()
 110                 {
 111                 }
 112
 113                 public abstract RuntimeMethodHandle MethodHandle { get; }
 114                 public abstract MethodAttributes Attributes { get; }
 115                 public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
 116                 public Boolean IsPublic {
 117                         get {
 118                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
 119                         }
 120                 }
 121                 public Boolean IsPrivate {
 122                         get {
 123                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
 124                         }
 125                 }
 126                 public Boolean IsFamily {
 127                         get {
 128                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
 129                         }
 130                 }
 131                 public Boolean IsAssembly {
 132                         get {
 133                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
 134                         }
 135                 }
 136                 public Boolean IsFamilyAndAssembly {
 137                         get {
 138                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
 139                         }
 140                 }
 141                 public Boolean IsFamilyOrAssembly {
 142                         get {
 143                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
 144                         }
 145                 }
 146                 public Boolean IsStatic {
 147                         get {
 148                                 return (Attributes & MethodAttributes.Static) != 0;
 149                         }
 150                 }
 151                 public Boolean IsFinal {
 152                         get {
 153                                 return (Attributes & MethodAttributes.Final) != 0;
 154                         }
 155                 }
 156                 public Boolean IsVirtual {
 157                         get {
 158                                 return (Attributes & MethodAttributes.Virtual) != 0;
 159                         }
 160                 }
 161                 public Boolean IsHideBySig {
 162                         get {
 163                                 return (Attributes & MethodAttributes.HideBySig) != 0;
 164                         }
 165                 }
 166                 public Boolean IsAbstract {
 167                         get {
 168                                 return (Attributes & MethodAttributes.Abstract) != 0;
 169                         }
 170                 }
 171                 public Boolean IsSpecialName {
 172                         get {
 173                                 int attr = (int)Attributes;
 174                                 return (attr & (int)MethodAttributes.SpecialName) != 0;
 175                         }
 176                 }
 177                 [ComVisibleAttribute (true)]
 178                 public Boolean IsConstructor {
 179                         get {
 180                                 int attr = (int)Attributes;
 181                                 return ((attr & (int)MethodAttributes.RTSpecialName) != 0
 182                                         && (Name == ".ctor"));
 183                         }
 184                 }
 185
 186                 internal virtual int get_next_table_index (object obj, int table, bool inc) {
 187 #if !FULL_AOT_RUNTIME
 188                         if (this is MethodBuilder) {
 189                                 MethodBuilder mb = (MethodBuilder)this;
 190                                 return mb.get_next_table_index (obj, table, inc);
 191                         }
 192                         if (this is ConstructorBuilder) {
 193                                 ConstructorBuilder mb = (ConstructorBuilder)this;
 194                                 return mb.get_next_table_index (obj, table, inc);
 195                         }
 196 #endif
 197                         throw new Exception ("Method is not a builder method");
 198                 }
 199
 200                 [ComVisible (true)]
 201                 public virtual Type [] GetGenericArguments ()
 202                 {
 203                         throw new NotSupportedException ();
 204                 }
 205
 206                 public virtual bool ContainsGenericParameters {
 207                         get {
 208                                 return false;
 209                         }
 210                 }
 211
 212                 public virtual bool IsGenericMethodDefinition {
 213                         get {
 214                                 return false;
 215                         }
 216                 }
 217
 218                 public virtual bool IsGenericMethod {
 219                         get {
 220                                 return false;
 221                         }
 222                 }
 223
 224                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 225                 internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);
 226
 227                 internal static MethodBody GetMethodBody (IntPtr handle) {
 228                         return GetMethodBodyInternal (handle);
 229                 }
 230
 231                 public virtual MethodBody GetMethodBody () {
 232                         throw new NotSupportedException ();
 233                 }
 234
 235 #if NET_4_0
 236                 public override bool Equals (object obj)
 237                 {
 238                         return obj == (object) this;
 239                 }
 240
 241                 public override int GetHashCode ()
 242                 {
 243                         return base.GetHashCode ();
 244                 }
 245
 246                 public static bool operator == (MethodBase left, MethodBase right)
 247                 {
 248                         if ((object)left == (object)right)
 249                                 return true;
 250                         if ((object)left == null ^ (object)right == null)
 251                                 return false;
 252                         return left.Equals (right);
 253                 }
 254
 255                 public static bool operator != (MethodBase left, MethodBase right)
 256                 {
 257                         if ((object)left == (object)right)
 258                                 return false;
 259                         if ((object)left == null ^ (object)right == null)
 260                                 return true;
 261                         return !left.Equals (right);
 262                 }
 263
 264                 public virtual bool IsSecurityCritical {
 265                         get {
 266                                 throw new NotImplementedException ();
 267                         }
 268                 }
 269
 270                 public virtual bool IsSecuritySafeCritical {
 271                         get {
 272                                 throw new NotImplementedException ();
 273                         }
 274                 }
 275
 276                 public virtual bool IsSecurityTransparent {
 277                         get {
 278                                 throw new NotImplementedException ();
 279                         }
 280                 }
 281 #endif
 282
 283 #if !MOBILE
 284                 void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 285                 {
 286                         throw new NotImplementedException ();
 287                 }
 288
 289                 Type _MethodBase.GetType ()
 290                 {
 291                         // Required or object::GetType becomes virtual final
 292                         return base.GetType ();
 293                 }
 294
 295                 void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 296                 {
 297                         throw new NotImplementedException ();
 298                 }
 299
 300                 void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
 301                 {
 302                         throw new NotImplementedException ();
 303                 }
 304
 305                 void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 306                 {
 307                         throw new NotImplementedException ();
 308                 }
 309 #endif
 310         }
 311 }