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         public abstract class MethodBase: MemberInfo, _MethodBase {
  46
  47                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  48                 public extern static MethodBase GetCurrentMethod ();
  49
  50                 internal static MethodBase GetMethodFromHandleNoGenericCheck (RuntimeMethodHandle handle)
  51                 {
  52                         return GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  53                 }
  54
  55                 static MethodBase GetMethodFromIntPtr (IntPtr handle, IntPtr declaringType)
  56                 {
  57                         if (handle == IntPtr.Zero)
  58                                 throw new ArgumentException ("The handle is invalid.");
  59                         MethodBase res = GetMethodFromHandleInternalType (handle, declaringType);
  60                         if (res == null)
  61                                 throw new ArgumentException ("The handle is invalid.");
  62                         return res;
  63                 }
  64
  65                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle)
  66                 {
  67                         MethodBase res = GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  68                         Type t = res.DeclaringType;
  69                         if (t.IsGenericType || t.IsGenericTypeDefinition)
  70                                 throw new ArgumentException ("Cannot resolve method because it's declared in a generic class.");
  71                         return res;
  72                 }
  73
  74                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  75                 private extern static MethodBase GetMethodFromHandleInternalType (IntPtr method_handle, IntPtr type_handle);
  76
  77                 [ComVisible (false)]
  78                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle, RuntimeTypeHandle declaringType)
  79                 {
  80                         return GetMethodFromIntPtr (handle.Value, declaringType.Value);
  81                 }
  82
  83                 public abstract MethodImplAttributes GetMethodImplementationFlags();
  84
  85                 public abstract ParameterInfo[] GetParameters();
  86
  87                 //
  88                 // This is a quick version for our own use. We should override
  89                 // it where possible so that it does not allocate an array.
  90                 //
  91                 internal virtual int GetParameterCount ()
  92                 {
  93                         throw new NotImplementedException ("must be implemented");
  94                 }
  95
  96                 internal virtual Type GetParameterType (int pos) {
  97                         throw new NotImplementedException ();
  98                 }
  99
 100                 [DebuggerHidden]
 101                 [DebuggerStepThrough]
 102                 public Object Invoke(Object obj, Object[] parameters) {
 103                         return Invoke (obj, 0, null, parameters, null);
 104                 }
 105
 106                 public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);
 107
 108                 protected MethodBase()
 109                 {
 110                 }
 111
 112                 public abstract RuntimeMethodHandle MethodHandle { get; }
 113                 public abstract MethodAttributes Attributes { get; }
 114                 public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
 115                 public Boolean IsPublic {
 116                         get {
 117                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
 118                         }
 119                 }
 120                 public Boolean IsPrivate {
 121                         get {
 122                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
 123                         }
 124                 }
 125                 public Boolean IsFamily {
 126                         get {
 127                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
 128                         }
 129                 }
 130                 public Boolean IsAssembly {
 131                         get {
 132                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
 133                         }
 134                 }
 135                 public Boolean IsFamilyAndAssembly {
 136                         get {
 137                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
 138                         }
 139                 }
 140                 public Boolean IsFamilyOrAssembly {
 141                         get {
 142                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
 143                         }
 144                 }
 145                 public Boolean IsStatic {
 146                         get {
 147                                 return (Attributes & MethodAttributes.Static) != 0;
 148                         }
 149                 }
 150                 public Boolean IsFinal {
 151                         get {
 152                                 return (Attributes & MethodAttributes.Final) != 0;
 153                         }
 154                 }
 155                 public Boolean IsVirtual {
 156                         get {
 157                                 return (Attributes & MethodAttributes.Virtual) != 0;
 158                         }
 159                 }
 160                 public Boolean IsHideBySig {
 161                         get {
 162                                 return (Attributes & MethodAttributes.HideBySig) != 0;
 163                         }
 164                 }
 165                 public Boolean IsAbstract {
 166                         get {
 167                                 return (Attributes & MethodAttributes.Abstract) != 0;
 168                         }
 169                 }
 170                 public Boolean IsSpecialName {
 171                         get {
 172                                 int attr = (int)Attributes;
 173                                 return (attr & (int)MethodAttributes.SpecialName) != 0;
 174                         }
 175                 }
 176                 [ComVisibleAttribute (true)]
 177                 public Boolean IsConstructor {
 178                         get {
 179                                 int attr = (int)Attributes;
 180                                 return ((attr & (int)MethodAttributes.RTSpecialName) != 0
 181                                         && (Name == ".ctor"));
 182                         }
 183                 }
 184
 185                 internal virtual int get_next_table_index (object obj, int table, bool inc) {
 186 #if !FULL_AOT_RUNTIME
 187                         if (this is MethodBuilder) {
 188                                 MethodBuilder mb = (MethodBuilder)this;
 189                                 return mb.get_next_table_index (obj, table, inc);
 190                         }
 191                         if (this is ConstructorBuilder) {
 192                                 ConstructorBuilder mb = (ConstructorBuilder)this;
 193                                 return mb.get_next_table_index (obj, table, inc);
 194                         }
 195 #endif
 196                         throw new Exception ("Method is not a builder method");
 197                 }
 198
 199                 [ComVisible (true)]
 200                 public virtual Type [] GetGenericArguments ()
 201                 {
 202                         throw new NotSupportedException ();
 203                 }
 204
 205                 public virtual bool ContainsGenericParameters {
 206                         get {
 207                                 return false;
 208                         }
 209                 }
 210
 211                 public virtual bool IsGenericMethodDefinition {
 212                         get {
 213                                 return false;
 214                         }
 215                 }
 216
 217                 public virtual bool IsGenericMethod {
 218                         get {
 219                                 return false;
 220                         }
 221                 }
 222
 223                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 224                 internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);
 225
 226                 internal static MethodBody GetMethodBody (IntPtr handle) {
 227                         return GetMethodBodyInternal (handle);
 228                 }
 229
 230                 public virtual MethodBody GetMethodBody () {
 231                         throw new NotSupportedException ();
 232                 }
 233
 234 #if NET_4_0
 235                 public override bool Equals (object obj)
 236                 {
 237                         return obj == (object) this;
 238                 }
 239
 240                 public override int GetHashCode ()
 241                 {
 242                         return base.GetHashCode ();
 243                 }
 244
 245                 public static bool operator == (MethodBase left, MethodBase right)
 246                 {
 247                         if ((object)left == (object)right)
 248                                 return true;
 249                         if ((object)left == null ^ (object)right == null)
 250                                 return false;
 251                         return left.Equals (right);
 252                 }
 253
 254                 public static bool operator != (MethodBase left, MethodBase right)
 255                 {
 256                         if ((object)left == (object)right)
 257                                 return false;
 258                         if ((object)left == null ^ (object)right == null)
 259                                 return true;
 260                         return !left.Equals (right);
 261                 }
 262
 263                 public virtual bool IsSecurityCritical {
 264                         get {
 265                                 throw new NotImplementedException ();
 266                         }
 267                 }
 268
 269                 public virtual bool IsSecuritySafeCritical {
 270                         get {
 271                                 throw new NotImplementedException ();
 272                         }
 273                 }
 274
 275                 public virtual bool IsSecurityTransparent {
 276                         get {
 277                                 throw new NotImplementedException ();
 278                         }
 279                 }
 280 #endif
 281
 282                 void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 283                 {
 284                         throw new NotImplementedException ();
 285                 }
 286
 287                 void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 288                 {
 289                         throw new NotImplementedException ();
 290                 }
 291
 292                 void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
 293                 {
 294                         throw new NotImplementedException ();
 295                 }
 296
 297                 void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 298                 {
 299                         throw new NotImplementedException ();
 300                 }
 301         }
 302 }