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                         throw new NotImplementedException ("must be implemented");
  91                 }
  92
  93                 [DebuggerHidden]
  94                 [DebuggerStepThrough]
  95                 public Object Invoke(Object obj, Object[] parameters) {
  96                         return Invoke (obj, 0, null, parameters, null);
  97                 }
  98
  99                 public abstract Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture);
 100
 101                 protected MethodBase()
 102                 {
 103                 }
 104
 105                 public abstract RuntimeMethodHandle MethodHandle { get; }
 106                 public abstract MethodAttributes Attributes { get; }
 107                 public virtual CallingConventions CallingConvention { get {return CallingConventions.Standard;} }
 108                 public Boolean IsPublic {
 109                         get {
 110                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Public;
 111                         }
 112                 }
 113                 public Boolean IsPrivate {
 114                         get {
 115                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private;
 116                         }
 117                 }
 118                 public Boolean IsFamily {
 119                         get {
 120                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Family;
 121                         }
 122                 }
 123                 public Boolean IsAssembly {
 124                         get {
 125                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Assembly;
 126                         }
 127                 }
 128                 public Boolean IsFamilyAndAssembly {
 129                         get {
 130                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamANDAssem;
 131                         }
 132                 }
 133                 public Boolean IsFamilyOrAssembly {
 134                         get {
 135                                 return (Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.FamORAssem;
 136                         }
 137                 }
 138                 public Boolean IsStatic {
 139                         get {
 140                                 return (Attributes & MethodAttributes.Static) != 0;
 141                         }
 142                 }
 143                 public Boolean IsFinal {
 144                         get {
 145                                 return (Attributes & MethodAttributes.Final) != 0;
 146                         }
 147                 }
 148                 public Boolean IsVirtual {
 149                         get {
 150                                 return (Attributes & MethodAttributes.Virtual) != 0;
 151                         }
 152                 }
 153                 public Boolean IsHideBySig {
 154                         get {
 155                                 return (Attributes & MethodAttributes.HideBySig) != 0;
 156                         }
 157                 }
 158                 public Boolean IsAbstract {
 159                         get {
 160                                 return (Attributes & MethodAttributes.Abstract) != 0;
 161                         }
 162                 }
 163                 public Boolean IsSpecialName {
 164                         get {
 165                                 int attr = (int)Attributes;
 166                                 return (attr & (int)MethodAttributes.SpecialName) != 0;
 167                         }
 168                 }
 169                 [ComVisibleAttribute (true)]
 170                 public Boolean IsConstructor {
 171                         get {
 172                                 int attr = (int)Attributes;
 173                                 return ((attr & (int)MethodAttributes.RTSpecialName) != 0
 174                                         && (Name == ".ctor"));
 175                         }
 176                 }
 177
 178                 internal virtual int get_next_table_index (object obj, int table, bool inc) {
 179                         if (this is MethodBuilder) {
 180                                 MethodBuilder mb = (MethodBuilder)this;
 181                                 return mb.get_next_table_index (obj, table, inc);
 182                         }
 183                         if (this is ConstructorBuilder) {
 184                                 ConstructorBuilder mb = (ConstructorBuilder)this;
 185                                 return mb.get_next_table_index (obj, table, inc);
 186                         }
 187                         throw new Exception ("Method is not a builder method");
 188                 }
 189
 190                 [ComVisible (true)]
 191                 public virtual Type [] GetGenericArguments ()
 192                 {
 193                         throw new NotSupportedException ();
 194                 }
 195
 196                 public virtual bool ContainsGenericParameters {
 197                         get {
 198                                 return false;
 199                         }
 200                 }
 201
 202                 public virtual bool IsGenericMethodDefinition {
 203                         get {
 204                                 return false;
 205                         }
 206                 }
 207
 208                 public virtual bool IsGenericMethod {
 209                         get {
 210                                 return false;
 211                         }
 212                 }
 213
 214                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 215                 internal extern static MethodBody GetMethodBodyInternal (IntPtr handle);
 216
 217                 internal static MethodBody GetMethodBody (IntPtr handle) {
 218                         return GetMethodBodyInternal (handle);
 219                 }
 220
 221                 public virtual MethodBody GetMethodBody () {
 222                         throw new NotSupportedException ();
 223                 }
 224
 225
 226 #if NET_4_0
 227                 public override bool Equals (object obj)
 228                 {
 229                         return obj == this;
 230                 }
 231
 232                 public override int GetHashCode ()
 233                 {
 234                         return base.GetHashCode ();
 235                 }
 236
 237                 public static bool operator == (MethodBase left, MethodBase right)
 238                 {
 239                         if ((object)left == (object)right)
 240                                 return true;
 241                         if ((object)left == null ^ (object)right == null)
 242                                 return false;
 243                         return left.Equals (right);
 244                 }
 245
 246                 public static bool operator != (MethodBase left, MethodBase right)
 247                 {
 248                         if ((object)left == (object)right)
 249                                 return false;
 250                         if ((object)left == null ^ (object)right == null)
 251                                 return true;
 252                         return !left.Equals (right);
 253                 }
 254 #endif
 255
 256                 void _MethodBase.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 257                 {
 258                         throw new NotImplementedException ();
 259                 }
 260
 261                 void _MethodBase.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 262                 {
 263                         throw new NotImplementedException ();
 264                 }
 265
 266                 void _MethodBase.GetTypeInfoCount (out uint pcTInfo)
 267                 {
 268                         throw new NotImplementedException ();
 269                 }
 270
 271                 void _MethodBase.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 272                 {
 273                         throw new NotImplementedException ();
 274                 }
 275         }
 276 }