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 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.Diagnostics;
  31 using System.Globalization;
  32 using System.Reflection.Emit;
  33 using System.Runtime.CompilerServices;
  34 using System.Runtime.InteropServices;
  35
  36 namespace System.Reflection {
  37
  38         [ComVisible (true)]
  39         [ComDefaultInterfaceAttribute (typeof (_MethodBase))]
  40         [Serializable]
  41         [ClassInterface(ClassInterfaceType.None)]
  42         public abstract class MethodBase: MemberInfo, _MethodBase {
  43
  44                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  45                 public extern static MethodBase GetCurrentMethod ();
  46
  47                 internal static MethodBase GetMethodFromHandleNoGenericCheck (RuntimeMethodHandle handle)
  48                 {
  49                         return GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  50                 }
  51
  52                 static MethodBase GetMethodFromIntPtr (IntPtr handle, IntPtr declaringType)
  53                 {
  54                         if (handle == IntPtr.Zero)
  55                                 throw new ArgumentException ("The handle is invalid.");
  56                         MethodBase res = GetMethodFromHandleInternalType (handle, declaringType);
  57                         if (res == null)
  58                                 throw new ArgumentException ("The handle is invalid.");
  59                         return res;
  60                 }
  61
  62                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle)
  63                 {
  64                         MethodBase res = GetMethodFromIntPtr (handle.Value, IntPtr.Zero);
  65                         Type t = res.DeclaringType;
  66                         if (t.IsGenericType || t.IsGenericTypeDefinition)
  67                                 throw new ArgumentException ("Cannot resolve method because it's declared in a generic class.");
  68                         return res;
  69                 }
  70
  71                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  72                 private extern static MethodBase GetMethodFromHandleInternalType (IntPtr method_handle, IntPtr type_handle);
  73
  74                 [ComVisible (false)]
  75                 public static MethodBase GetMethodFromHandle (RuntimeMethodHandle handle, RuntimeTypeHandle declaringType)
  76                 {
  77                         return GetMethodFromIntPtr (handle.Value, declaringType.Value);
  78                 }
  79
  80                 public abstract MethodImplAttributes GetMethodImplementationFlags();
  81
  82                 public abstract ParameterInfo[] GetParameters();
  83
  84                 //
  85                 // This is a quick version for our own use. We should override
  86                 // it where possible so that it does not allocate an array.
  87                 //
  88                 internal virtual int GetParameterCount ()
  89                 {
  90                         ParameterInfo [] pi = GetParameters ();
  91                         if (pi == null)
  92                                 return 0;
  93
  94                         return pi.Length;
  95                 }
  96
  97 #if ONLY_1_1
  98                 public new Type GetType ()
  99                 {
 100                         return base.GetType ();
 101                 }
 102 #endif
 103
 104                 [DebuggerHidden]
 105                 [DebuggerStepThrough]
 106                 public Object Invoke(Object obj, Object[] parameters) {
 107                         return Invoke (obj, 0, null, parameters, null);
 108                 }
 109
 110                 public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);
 111
 112                 protected MethodBase()
 113                 {
 114                 }
 115
 116                 public abstract RuntimeMethodHandle MethodHandle { get; }
 117                 public abstract MethodAttributes Attributes { get; }
 118                 public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
 119                 public Boolean IsPublic {
 120                         get {
 121                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
 122                         }
 123                 }
 124                 public Boolean IsPrivate {
 125                         get {
 126                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
 127                         }
 128                 }
 129                 public Boolean IsFamily {
 130                         get {
 131                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
 132                         }
 133                 }
 134                 public Boolean IsAssembly {
 135                         get {
 136                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
 137                         }
 138                 }
 139                 public Boolean IsFamilyAndAssembly {
 140                         get {
 141                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
 142                         }
 143                 }
 144                 public Boolean IsFamilyOrAssembly {
 145                         get {
 146                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
 147                         }
 148                 }
 149                 public Boolean IsStatic {
 150                         get {
 151                                 return (Attributes & MethodAttributes.Static) != 0;
 152                         }
 153                 }
 154                 public Boolean IsFinal {
 155                         get {
 156                                 return (Attributes & MethodAttributes.Final) != 0;
 157                         }
 158                 }
 159                 public Boolean IsVirtual {
 160                         get {
 161                                 return (Attributes & MethodAttributes.Virtual) != 0;
 162                         }
 163                 }
 164                 public Boolean IsHideBySig {
 165                         get {
 166                                 return (Attributes & MethodAttributes.HideBySig) != 0;
 167                         }
 168                 }
 169                 public Boolean IsAbstract {
 170                         get {
 171                                 return (Attributes & MethodAttributes.Abstract) != 0;
 172                         }
 173                 }
 174                 public Boolean IsSpecialName {
 175                         get {
 176                                 int attr = (int)Attributes;
 177                                 return (attr & (int)MethodAttributes.SpecialName) != 0;
 178                         }
 179                 }
 180                 [ComVisibleAttribute (true)]
 181                 public Boolean IsConstructor {
 182                         get {
 183                                 int attr = (int)Attributes;
 184                                 return ((attr & (int)MethodAttributes.RTSpecialName) != 0
 185                                         && (Name == ".ctor"));
 186                         }
 187                 }
 188
 189                 internal virtual int get_next_table_index (object obj, int table, bool inc) {
 190                         if (this is MethodBuilder) {
 191                                 MethodBuilder mb = (MethodBuilder)this;
 192                                 return mb.get_next_table_index (obj, table, inc);
 193                         }
 194                         if (this is ConstructorBuilder) {
 195                                 ConstructorBuilder mb = (ConstructorBuilder)this;
 196                                 return mb.get_next_table_index (obj, table, inc);
 197                         }
 198                         throw new Exception ("Method is not a builder method");
 199                 }
 200
 201                 [ComVisible (true)]
 202                 public virtual Type [] GetGenericArguments ()
 203                 {
 204                         throw new NotSupportedException ();
 205                 }
 206
 207                 public virtual bool ContainsGenericParameters {
 208                         get {
 209                                 return false;
 210                         }
 211                 }
 212
 213                 public virtual bool IsGenericMethodDefinition {
 214                         get {
 215                                 return false;
 216                         }
 217                 }
 218
 219                 public virtual bool IsGenericMethod {
 220                         get {
 221                                 return false;
 222                         }
 223                 }
 224
 225                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 226                 internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);
 227
 228                 internal static MethodBody GetMethodBody (IntPtr handle) {
 229                         return GetMethodBodyInternal (handle);
 230                 }
 231
 232                 public virtual MethodBody GetMethodBody () {
 233                         throw new NotSupportedException ();
 234                 }
 235
 236
 237 #if NET_4_0
 238                 public override bool Equals (object obj)
 239                 {
 240                         return obj == this;
 241                 }
 242
 243                 public override int GetHashCode ()
 244                 {
 245                         return base.GetHashCode ();
 246                 }
 247
 248                 public static bool operator == (MethodBase left, MethodBase right)
 249                 {
 250                         if ((object)left == (object)right)
 251                                 return true;
 252                         if ((object)left == null ^ (object)right == null)
 253                                 return false;
 254                         return left.Equals (right);
 255                 }
 256
 257                 public static bool operator != (MethodBase left, MethodBase right)
 258                 {
 259                         if ((object)left == (object)right)
 260                                 return false;
 261                         if ((object)left == null ^ (object)right == null)
 262                                 return true;
 263                         return !left.Equals (right);
 264                 }
 265 #endif
 266
 267                 void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 268                 {
 269                         throw new NotImplementedException ();
 270                 }
 271
 272                 void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 273                 {
 274                         throw new NotImplementedException ();
 275                 }
 276
 277                 void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
 278                 {
 279                         throw new NotImplementedException ();
 280                 }
 281
 282                 void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 283                 {
 284                         throw new NotImplementedException ();
 285                 }
 286         }
 287 }