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 using System.Reflection.Emit;
  34 using System.Runtime.CompilerServices;
  35 using System.Runtime.InteropServices;
  36
  37 namespace System.Reflection {
  38
  39         [ComVisible (true)]
  40         [ComDefaultInterfaceAttribute (typeof (_MethodBase))]
  41         [Serializable]
  42         [ClassInterface(ClassInterfaceType.None)]
  43         public abstract class MethodBase: MemberInfo, _MethodBase {
  44
  45                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  46                 public extern static MethodBase GetCurrentMethod ();
  47
  48                 internal static MethodBase GetMethodFromHandleNoGenericCheck (RuntimeMethodHandle handle)
  49                 {
  50                         return GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  51                 }
  52
  53                 static MethodBase GetMethodFromIntPtr (IntPtr handle, IntPtr declaringType)
  54                 {
  55                         if (handle == IntPtr.Zero)
  56                                 throw new ArgumentException ("The handle is invalid.");
  57                         MethodBase res = GetMethodFromHandleInternalType (handle, declaringType);
  58                         if (res == null)
  59                                 throw new ArgumentException ("The handle is invalid.");
  60                         return res;
  61                 }
  62
  63                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle)
  64                 {
  65                         MethodBase res = GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  66                         Type t = res.DeclaringType;
  67                         if (t.IsGenericType || t.IsGenericTypeDefinition)
  68                                 throw new ArgumentException ("Cannot resolve method because it's declared in a generic class.");
  69                         return res;
  70                 }
  71
  72                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  73                 private extern static MethodBase GetMethodFromHandleInternalType (IntPtr method_handle, IntPtr type_handle);
  74
  75                 [ComVisible (false)]
  76                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle, RuntimeTypeHandle declaringType)
  77                 {
  78                         return GetMethodFromIntPtr (handle.Value, declaringType.Value);
  79                 }
  80
  81                 public abstract MethodImplAttributes GetMethodImplementationFlags();
  82
  83                 public abstract ParameterInfo[] GetParameters();
  84
  85                 //
  86                 // This is a quick version for our own use. We should override
  87                 // it where possible so that it does not allocate an array.
  88                 //
  89                 internal virtual int GetParameterCount ()
  90                 {
  91                         throw new NotImplementedException ("must be implemented");
  92                 }
  93
  94                 internal virtual Type GetParameterType (int pos) {
  95                         throw new NotImplementedException ();
  96                 }
  97
  98                 [DebuggerHidden]
  99                 [DebuggerStepThrough]
 100                 public Object Invoke(Object obj, Object[] parameters) {
 101                         return Invoke (obj, 0, null, parameters, null);
 102                 }
 103
 104                 public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);
 105
 106                 protected MethodBase()
 107                 {
 108                 }
 109
 110                 public abstract RuntimeMethodHandle MethodHandle { get; }
 111                 public abstract MethodAttributes Attributes { get; }
 112                 public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
 113                 public Boolean IsPublic {
 114                         get {
 115                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
 116                         }
 117                 }
 118                 public Boolean IsPrivate {
 119                         get {
 120                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
 121                         }
 122                 }
 123                 public Boolean IsFamily {
 124                         get {
 125                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
 126                         }
 127                 }
 128                 public Boolean IsAssembly {
 129                         get {
 130                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
 131                         }
 132                 }
 133                 public Boolean IsFamilyAndAssembly {
 134                         get {
 135                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
 136                         }
 137                 }
 138                 public Boolean IsFamilyOrAssembly {
 139                         get {
 140                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
 141                         }
 142                 }
 143                 public Boolean IsStatic {
 144                         get {
 145                                 return (Attributes & MethodAttributes.Static) != 0;
 146                         }
 147                 }
 148                 public Boolean IsFinal {
 149                         get {
 150                                 return (Attributes & MethodAttributes.Final) != 0;
 151                         }
 152                 }
 153                 public Boolean IsVirtual {
 154                         get {
 155                                 return (Attributes & MethodAttributes.Virtual) != 0;
 156                         }
 157                 }
 158                 public Boolean IsHideBySig {
 159                         get {
 160                                 return (Attributes & MethodAttributes.HideBySig) != 0;
 161                         }
 162                 }
 163                 public Boolean IsAbstract {
 164                         get {
 165                                 return (Attributes & MethodAttributes.Abstract) != 0;
 166                         }
 167                 }
 168                 public Boolean IsSpecialName {
 169                         get {
 170                                 int attr = (int)Attributes;
 171                                 return (attr & (int)MethodAttributes.SpecialName) != 0;
 172                         }
 173                 }
 174                 [ComVisibleAttribute (true)]
 175                 public Boolean IsConstructor {
 176                         get {
 177                                 int attr = (int)Attributes;
 178                                 return ((attr & (int)MethodAttributes.RTSpecialName) != 0
 179                                         && (Name == ".ctor"));
 180                         }
 181                 }
 182
 183                 internal virtual int get_next_table_index (object obj, int table, bool inc) {
 184                         if (this is MethodBuilder) {
 185                                 MethodBuilder mb = (MethodBuilder)this;
 186                                 return mb.get_next_table_index (obj, table, inc);
 187                         }
 188                         if (this is ConstructorBuilder) {
 189                                 ConstructorBuilder mb = (ConstructorBuilder)this;
 190                                 return mb.get_next_table_index (obj, table, inc);
 191                         }
 192                         throw new Exception ("Method is not a builder method");
 193                 }
 194
 195                 [ComVisible (true)]
 196                 public virtual Type [] GetGenericArguments ()
 197                 {
 198                         throw new NotSupportedException ();
 199                 }
 200
 201                 public virtual bool ContainsGenericParameters {
 202                         get {
 203                                 return false;
 204                         }
 205                 }
 206
 207                 public virtual bool IsGenericMethodDefinition {
 208                         get {
 209                                 return false;
 210                         }
 211                 }
 212
 213                 public virtual bool IsGenericMethod {
 214                         get {
 215                                 return false;
 216                         }
 217                 }
 218
 219                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 220                 internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);
 221
 222                 internal static MethodBody GetMethodBody (IntPtr handle) {
 223                         return GetMethodBodyInternal (handle);
 224                 }
 225
 226                 public virtual MethodBody GetMethodBody () {
 227                         throw new NotSupportedException ();
 228                 }
 229
 230 #if NET_4_0
 231                 public override bool Equals (object obj)
 232                 {
 233                         return obj == (object) this;
 234                 }
 235
 236                 public override int GetHashCode ()
 237                 {
 238                         return base.GetHashCode ();
 239                 }
 240
 241                 public static bool operator == (MethodBase left, MethodBase right)
 242                 {
 243                         if ((object)left == (object)right)
 244                                 return true;
 245                         if ((object)left == null ^ (object)right == null)
 246                                 return false;
 247                         return left.Equals (right);
 248                 }
 249
 250                 public static bool operator != (MethodBase left, MethodBase right)
 251                 {
 252                         if ((object)left == (object)right)
 253                                 return false;
 254                         if ((object)left == null ^ (object)right == null)
 255                                 return true;
 256                         return !left.Equals (right);
 257                 }
 258
 259                 public virtual bool IsSecurityCritical {
 260                         get {
 261                                 throw new NotImplementedException ();
 262                         }
 263                 }
 264
 265                 public virtual bool IsSecuritySafeCritical {
 266                         get {
 267                                 throw new NotImplementedException ();
 268                         }
 269                 }
 270
 271                 public virtual bool IsSecurityTransparent {
 272                         get {
 273                                 throw new NotImplementedException ();
 274                         }
 275                 }
 276 #endif
 277
 278                 void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 279                 {
 280                         throw new NotImplementedException ();
 281                 }
 282
 283                 void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 284                 {
 285                         throw new NotImplementedException ();
 286                 }
 287
 288                 void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
 289                 {
 290                         throw new NotImplementedException ();
 291                 }
 292
 293                 void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 294                 {
 295                         throw new NotImplementedException ();
 296                 }
 297         }
 298 }