2 // System.ComponentModel.Design.Serialization.InstanceDescriptor.cs
5 // Martin Willemoes Hansen (mwh@sysrq.dk)
6 // Andreas Nahr (ClassDevelopment@A-SoftTech.com)
8 // (C) 2003 Martin Willemoes Hansen
9 // (C) 2003 Andreas Nahr
12 using System.Collections;
13 using System.Reflection;
15 namespace System.ComponentModel.Design.Serialization
17 public sealed class InstanceDescriptor
20 private MemberInfo member;
21 private ICollection arguments;
22 private bool isComplete;
24 public InstanceDescriptor (MemberInfo member, ICollection arguments)
25 : this (member, arguments, true)
29 public InstanceDescriptor(MemberInfo member, ICollection arguments, bool isComplete)
31 this.isComplete = isComplete;
33 throw new ArgumentNullException ("member", "MemberInfo must be valid");
34 if (!IsMemberValid (member, arguments))
35 throw new ArgumentException ("Only Constructor, Method, Field or Property members allowed", "member");
37 this.arguments = arguments;
40 private bool IsMemberValid (MemberInfo member, ICollection arguments)
42 switch (member.MemberType) {
43 // According to docs only these types are allowed
44 case MemberTypes.Constructor:
45 ConstructorInfo CI = (ConstructorInfo) member;
47 throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
48 if (arguments == null) // null counts as no arguments
49 if (CI.GetParameters().Length != 0)
50 throw new ArgumentException ("Invalid number of arguments for this constructor", "arguments");
51 if (arguments.Count != CI.GetParameters().Length)
52 throw new ArgumentException ("Invalid number of arguments for this constructor", "arguments");
54 case MemberTypes.Method:
55 MethodInfo MI = (MethodInfo) member;
57 throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
58 if (arguments == null) // null counts as no arguments
59 if (MI.GetParameters().Length != 0)
60 throw new ArgumentException ("Invalid number of arguments for this method", "arguments");
61 if (arguments.Count != MI.GetParameters().Length)
62 throw new ArgumentException ("Invalid number of arguments for this method", "arguments");
64 case MemberTypes.Field:
65 FieldInfo FI = (FieldInfo) member;
67 throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
68 if (arguments == null) // null counts as no arguments
70 if (arguments.Count == 0)
71 throw new ArgumentException ("Field members do not take any arguments", "arguments");
73 case MemberTypes.Property:
74 PropertyInfo PI = (PropertyInfo) member;
76 throw new ArgumentException ("That property cannot be read", "member");
77 MethodInfo PIM = PI.GetGetMethod();
79 throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
80 if (arguments == null) // null counts as no arguments
81 if (PIM.GetParameters().Length != 0)
82 throw new ArgumentException ("Invalid number of arguments for this property", "arguments");
83 if (arguments.Count != PIM.GetParameters().Length)
84 throw new ArgumentException ("Invalid number of arguments for this property", "arguments");
90 public ICollection Arguments {
92 // It seems MS does not return null even if we specified null as parameter (but does not cause an exception)
93 if (arguments == null)
99 public bool IsComplete {
100 get { return isComplete; }
103 public MemberInfo MemberInfo {
104 get { return member; }
107 public object Invoke()
109 object[] parsearguments;
110 if (arguments == null)
111 parsearguments = new object[0];
113 parsearguments = new object[arguments.Count - 1];
114 arguments.CopyTo (parsearguments, 0);
118 switch (member.MemberType) {
119 case MemberTypes.Constructor:
120 ConstructorInfo CI = (ConstructorInfo) member;
121 return CI.Invoke (parsearguments);
123 case MemberTypes.Method:
124 MethodInfo MI = (MethodInfo) member;
125 return MI.Invoke (null, parsearguments);
127 case MemberTypes.Field:
128 FieldInfo FI = (FieldInfo) member;
129 return FI.GetValue (null);
131 case MemberTypes.Property:
132 PropertyInfo PI = (PropertyInfo) member;
133 return PI.GetValue (null, parsearguments);