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//
// System.ComponentModel.Design.Serialization.InstanceDescriptor.cs
//
// Authors:
// Martin Willemoes Hansen (mwh@sysrq.dk)
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
// (C) 2003 Martin Willemoes Hansen
// (C) 2003 Andreas Nahr
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections;
using System.Reflection;
namespace System.ComponentModel.Design.Serialization
{
public sealed class InstanceDescriptor
{
private MemberInfo member;
private ICollection arguments;
private bool isComplete;
public InstanceDescriptor (MemberInfo member, ICollection arguments)
: this (member, arguments, true)
{
}
public InstanceDescriptor(MemberInfo member, ICollection arguments, bool isComplete)
{
this.isComplete = isComplete;
if ((member != null) && !IsMemberValid (member, arguments))
throw new ArgumentException ("Only Constructor, Method, Field or Property members allowed", "member");
this.member = member;
this.arguments = arguments;
}
private bool IsMemberValid (MemberInfo member, ICollection arguments)
{
switch (member.MemberType) {
// According to docs only these types are allowed
case MemberTypes.Constructor:
ConstructorInfo CI = (ConstructorInfo) member;
if (arguments == null) // null counts as no arguments
if (CI.GetParameters().Length != 0)
throw new ArgumentException ("Invalid number of arguments for this constructor", "arguments");
if (arguments.Count != CI.GetParameters().Length)
throw new ArgumentException ("Invalid number of arguments for this constructor", "arguments");
return true;
case MemberTypes.Method:
MethodInfo MI = (MethodInfo) member;
if (!MI.IsStatic)
throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
if (arguments == null) // null counts as no arguments
if (MI.GetParameters().Length != 0)
throw new ArgumentException ("Invalid number of arguments for this method", "arguments");
if (arguments.Count != MI.GetParameters().Length)
throw new ArgumentException ("Invalid number of arguments for this method", "arguments");
return true;
case MemberTypes.Field:
FieldInfo FI = (FieldInfo) member;
if (!FI.IsStatic)
throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
if (arguments == null) // null counts as no arguments
return true;
if (arguments.Count == 0)
throw new ArgumentException ("Field members do not take any arguments", "arguments");
return true;
case MemberTypes.Property:
PropertyInfo PI = (PropertyInfo) member;
if (!(PI.CanRead))
throw new ArgumentException ("That property cannot be read", "member");
MethodInfo PIM = PI.GetGetMethod();
if (!PIM.IsStatic)
throw new ArgumentException ("InstanceDescriptor only describes static (VB.Net: shared) members", "member");
if (arguments == null) // null counts as no arguments
if (PIM.GetParameters().Length != 0)
throw new ArgumentException ("Invalid number of arguments for this property", "arguments");
if (arguments.Count != PIM.GetParameters().Length)
throw new ArgumentException ("Invalid number of arguments for this property", "arguments");
return true;
}
return false;
}
public ICollection Arguments {
get {
// It seems MS does not return null even if we specified null as parameter (but does not cause an exception)
if (arguments == null)
return new object[0];
return arguments;
}
}
public bool IsComplete {
get { return isComplete; }
}
public MemberInfo MemberInfo {
get { return member; }
}
private bool HasThis ()
{
if (member is ConstructorInfo)
return false;
MethodInfo mi = (member as MethodInfo);
if (mi != null)
return !mi.IsStatic;
FieldInfo fi = (member as FieldInfo);
if (fi != null)
return !fi.IsStatic;
PropertyInfo pi = (member as PropertyInfo);
if (pi != null)
return !pi.GetGetMethod ().IsStatic;
return true;
}
public object Invoke()
{
object[] parsearguments;
if (arguments == null)
parsearguments = new object[0];
else if (HasThis ()) {
parsearguments = new object[arguments.Count - 1];
arguments.CopyTo (parsearguments, 0);
} else {
parsearguments = (arguments as object[]);
if (parsearguments == null) {
parsearguments = new object[arguments.Count];
arguments.CopyTo (parsearguments, 0);
}
}
//MemberInfo member;
switch (member.MemberType) {
case MemberTypes.Constructor:
ConstructorInfo CI = (ConstructorInfo) member;
return CI.Invoke (parsearguments);
case MemberTypes.Method:
MethodInfo MI = (MethodInfo) member;
return MI.Invoke (null, parsearguments);
case MemberTypes.Field:
FieldInfo FI = (FieldInfo) member;
return FI.GetValue (null);
case MemberTypes.Property:
PropertyInfo PI = (PropertyInfo) member;
return PI.GetValue (null, parsearguments);
}
return null;
}
}
}
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