1 // System.Reflection.ParameterInfo
3 // Sean MacIsaac (macisaac@ximian.com)
5 // (C) 2001 Ximian, Inc.
6 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
8 // Permission is hereby granted, free of charge, to any person obtaining
9 // a copy of this software and associated documentation files (the
10 // "Software"), to deal in the Software without restriction, including
11 // without limitation the rights to use, copy, modify, merge, publish,
12 // distribute, sublicense, and/or sell copies of the Software, and to
13 // permit persons to whom the Software is furnished to do so, subject to
14 // the following conditions:
16 // The above copyright notice and this permission notice shall be
17 // included in all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 using System.Reflection.Emit;
29 using System.Runtime.CompilerServices;
30 using System.Runtime.InteropServices;
32 namespace System.Reflection
35 [ComDefaultInterfaceAttribute (typeof (_ParameterInfo))]
37 [ClassInterfaceAttribute (ClassInterfaceType.None)]
38 public class ParameterInfo : ICustomAttributeProvider, _ParameterInfo {
40 protected Type ClassImpl;
41 protected object DefaultValueImpl;
42 protected MemberInfo MemberImpl;
43 protected string NameImpl;
44 protected int PositionImpl;
45 protected ParameterAttributes AttrsImpl;
46 private UnmanagedMarshal marshalAs;
48 protected ParameterInfo () {
51 internal ParameterInfo (ParameterBuilder pb, Type type, MemberInfo member, int position) {
52 this.ClassImpl = type;
53 this.MemberImpl = member;
55 this.NameImpl = pb.Name;
56 this.PositionImpl = pb.Position - 1; // ParameterInfo.Position is zero-based
57 this.AttrsImpl = (ParameterAttributes) pb.Attributes;
60 this.PositionImpl = position - 1;
61 this.AttrsImpl = ParameterAttributes.None;
65 internal ParameterInfo (ParameterInfo pinfo, Type type, MemberInfo member, int position) {
66 this.ClassImpl = type;
67 this.MemberImpl = member;
69 this.NameImpl = pinfo.Name;
70 this.PositionImpl = pinfo.Position - 1; // ParameterInfo.Position is zero-based
71 this.AttrsImpl = (ParameterAttributes) pinfo.Attributes;
74 this.PositionImpl = position - 1;
75 this.AttrsImpl = ParameterAttributes.None;
79 /* to build a ParameterInfo for the return type of a method */
80 internal ParameterInfo (Type type, MemberInfo member, UnmanagedMarshal marshalAs) {
81 this.ClassImpl = type;
82 this.MemberImpl = member;
84 this.PositionImpl = -1; // since parameter positions are zero-based, return type pos is -1
85 this.AttrsImpl = ParameterAttributes.Retval;
86 this.marshalAs = marshalAs;
89 public override string ToString() {
90 Type elementType = ClassImpl;
91 while (elementType.HasElementType) {
92 elementType = elementType.GetElementType();
94 bool useShort = elementType.IsPrimitive || ClassImpl == typeof(void)
95 || ClassImpl.Namespace == MemberImpl.DeclaringType.Namespace;
96 string result = useShort
99 // MS.NET seems to skip this check and produce an extra space for return types
107 public virtual Type ParameterType {
108 get {return ClassImpl;}
110 public virtual ParameterAttributes Attributes {
111 get {return AttrsImpl;}
113 public virtual object DefaultValue {
115 if (ClassImpl == typeof (Decimal)) {
116 /* default values for decimals are encoded using a custom attribute */
117 DecimalConstantAttribute[] attrs = (DecimalConstantAttribute[])GetCustomAttributes (typeof (DecimalConstantAttribute), false);
118 if (attrs.Length > 0)
119 return attrs [0].Value;
120 } else if (ClassImpl == typeof (DateTime)) {
121 /* default values for DateTime are encoded using a custom attribute */
122 DateTimeConstantAttribute[] attrs = (DateTimeConstantAttribute[])GetCustomAttributes (typeof (DateTimeConstantAttribute), false);
123 if (attrs.Length > 0)
124 return new DateTime (attrs [0].Ticks);
126 return DefaultValueImpl;
132 return (Attributes & ParameterAttributes.In) != 0;
138 return (Attributes & ParameterAttributes.Lcid) != 0;
142 public bool IsOptional {
144 return (Attributes & ParameterAttributes.Optional) != 0;
150 return (Attributes & ParameterAttributes.Out) != 0;
154 public bool IsRetval {
156 return (Attributes & ParameterAttributes.Retval) != 0;
160 public virtual MemberInfo Member {
161 get {return MemberImpl;}
164 public virtual string Name {
165 get {return NameImpl;}
168 public virtual int Position {
169 get {return PositionImpl;}
172 public extern int MetadataToken {
173 [MethodImplAttribute (MethodImplOptions.InternalCall)]
177 public virtual object[] GetCustomAttributes (bool inherit)
179 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
182 public virtual object[] GetCustomAttributes (Type attributeType, bool inherit)
184 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
187 public virtual bool IsDefined( Type attributeType, bool inherit) {
188 return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
191 internal object[] GetPseudoCustomAttributes () {
200 if (marshalAs != null)
205 object[] attrs = new object [count];
209 attrs [count ++] = new InAttribute ();
211 attrs [count ++] = new OptionalAttribute ();
213 attrs [count ++] = new OutAttribute ();
215 if (marshalAs != null)
216 attrs [count ++] = marshalAs.ToMarshalAsAttribute ();
221 [MethodImplAttribute (MethodImplOptions.InternalCall)]
222 extern Type[] GetTypeModifiers (bool optional);
224 public virtual Type[] GetOptionalCustomModifiers () {
225 Type[] types = GetTypeModifiers (true);
227 return Type.EmptyTypes;
231 public virtual Type[] GetRequiredCustomModifiers () {
232 Type[] types = GetTypeModifiers (false);
234 return Type.EmptyTypes;
238 public virtual object RawDefaultValue {
240 /*FIXME right now DefaultValue doesn't throw for reflection-only assemblies. Change this once the former is fixed.*/
245 void _ParameterInfo.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
247 throw new NotImplementedException ();
250 void _ParameterInfo.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
252 throw new NotImplementedException ();
255 void _ParameterInfo.GetTypeInfoCount (out uint pcTInfo)
257 throw new NotImplementedException ();
260 void _ParameterInfo.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams,
261 IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
263 throw new NotImplementedException ();