2010-03-24 Rolf Bjarne Kvinge <RKvinge@novell.com>
[mono.git] / mcs / class / corlib / System.Reflection / MethodInfo.cs
1 //
2 // System.Reflection/MethodInfo.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.Runtime.CompilerServices;
32 using System.Runtime.InteropServices;
33
34 namespace System.Reflection {
35
36         [ComVisible (true)]
37         [ComDefaultInterfaceAttribute (typeof (_MethodInfo))]
38         [Serializable]
39         [ClassInterface(ClassInterfaceType.None)]
40         public abstract class MethodInfo: MethodBase, _MethodInfo {
41
42                 public abstract MethodInfo GetBaseDefinition();
43
44                 internal virtual MethodInfo GetBaseMethod ()
45                 {
46                         return this;
47                 }
48
49                 protected MethodInfo() {
50                 }
51
52
53                 public override MemberTypes MemberType { get {return MemberTypes.Method;} }
54
55                 public virtual Type ReturnType {
56                         get { return null; }
57                 }
58
59                 public abstract ICustomAttributeProvider ReturnTypeCustomAttributes { get; }
60
61                 // FIXME: when this method is uncommented, corlib fails
62                 // to build
63 /*
64                 [DebuggerStepThrough]
65                 [DebuggerHidden]
66                 public new object Invoke (object obj, object[] parameters)
67                 {
68                         return base.Invoke (obj, parameters);
69                 }
70 */
71
72                 void _MethodInfo.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
73                 {
74                         throw new NotImplementedException ();
75                 }
76
77                 void _MethodInfo.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
78                 {
79                         throw new NotImplementedException ();
80                 }
81
82                 void _MethodInfo.GetTypeInfoCount (out uint pcTInfo)
83                 {
84                         throw new NotImplementedException ();
85                 }
86
87                 void _MethodInfo.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
88                 {
89                         throw new NotImplementedException ();
90                 }
91
92                 [ComVisible (true)]
93                 public virtual MethodInfo GetGenericMethodDefinition ()
94                 {
95                         throw new NotSupportedException ();
96                 }
97
98                 public virtual MethodInfo MakeGenericMethod (params Type [] typeArguments)
99                 {
100                         throw new NotSupportedException (this.GetType().ToString ());
101                 }
102
103                 // GetGenericArguments, IsGenericMethod, IsGenericMethodDefinition
104                 // and ContainsGenericParameters are implemented in the derived classes.
105                 [ComVisible (true)]
106                 public override Type [] GetGenericArguments () {
107                         return Type.EmptyTypes;
108                 }
109
110 #if !NET_4_0 && !MOONLIGHT
111                 public override bool IsGenericMethod {
112                         get {
113                                 return false;
114                         }
115                 }
116
117                 public override bool IsGenericMethodDefinition {
118                         get {
119                                 return false;
120                         }
121                 }
122
123                 public override bool ContainsGenericParameters {
124                         get {
125                                 return false;
126                         }
127                 }
128 #endif
129
130                 public virtual ParameterInfo ReturnParameter {
131                         get {
132                                 throw new NotSupportedException ();
133                         }
134                 }
135
136 #if NET_4_0
137                 public override bool Equals (object obj)
138                 {
139                         return obj == this;
140                 }
141
142                 public override int GetHashCode ()
143                 {
144                         return base.GetHashCode ();
145                 }
146
147                 public static bool operator == (MethodInfo left, MethodInfo right)
148                 {
149                         if ((object)left == (object)right)
150                                 return true;
151                         if ((object)left == null ^ (object)right == null)
152                                 return false;
153                         return left.Equals (right);
154                 }
155
156                 public static bool operator != (MethodInfo left, MethodInfo right)
157                 {
158                         if ((object)left == (object)right)
159                                 return false;
160                         if ((object)left == null ^ (object)right == null)
161                                 return true;
162                         return !left.Equals (right);
163                 }
164 #endif
165
166         }
167 }