DelegateTypeInfo.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / Shared / DelegateTypeInfo.cs / 1305376 / DelegateTypeInfo.cs
                        

                        
                            // Copyright (c) Microsoft Corporation. All rights reserved. 
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
// WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE. 
// THE ENTIRE RISK OF USE OR RESULTS IN CONNECTION WITH THE USE OF THIS CODE
// AND INFORMATION REMAINS WITH THE USER. 
 

/********************************************************************** 
 * NOTE: A copy of this file exists at: WF\Activities\Common
 * The two files must be kept in [....].  Any change made here must also
 * be made to WF\Activities\Common\DelegateTypeInfo.cs
*********************************************************************/ 
namespace System.Workflow.ComponentModel
{ 
    using System; 
 	using System.CodeDom;
	using System.Collections; 
	using System.Globalization;
	using System.ComponentModel;
 	using System.ComponentModel.Design;
	using System.Reflection; 
 	using System.Diagnostics.CodeAnalysis;
 
 	internal class DelegateTypeInfo 
	{
 		private CodeParameterDeclarationExpression[] parameters; 
		private Type[] parameterTypes;
		private CodeTypeReference returnType;

		internal CodeParameterDeclarationExpression[] Parameters 
 		{
			get 
 			{ 
 				return parameters;
			} 
 		}

		internal Type[] ParameterTypes
		{ 
			get
 			{ 
				return parameterTypes; 
 			}
 		} 

		internal CodeTypeReference ReturnType
 		{
			get 
			{
				return returnType; 
 			} 
		}
 
 		internal DelegateTypeInfo(Type delegateClass)
 		{
			Resolve(delegateClass);
 		} 

		[SuppressMessage("Microsoft.Globalization", "CA1307:SpecifyStringComparison", Justification = "EndsWith(\"&\") not a security issue.")] 
		private void Resolve(Type delegateClass) 
		{
 			MethodInfo invokeMethod = delegateClass.GetMethod("Invoke"); 
			if (invokeMethod == null)
                throw new ArgumentException("delegateClass");
 			Resolve(invokeMethod);
 		} 

		[SuppressMessage("Microsoft.Globalization", "CA1307:SpecifyStringComparison", Justification = "EndsWith(\"&\") not a security issue.")] 
 		private void Resolve(MethodInfo method) 
		{
			// Here we build up an array of argument types, separated 
			// by commas.
 			ParameterInfo[] argTypes = method.GetParameters();

			parameters = new CodeParameterDeclarationExpression[argTypes.Length]; 
 			parameterTypes = new Type[argTypes.Length];
 			for (int index = 0; index < argTypes.Length; index++) 
			{ 
 				string paramName = argTypes[index].Name;
				Type paramType = argTypes[index].ParameterType; 

				if (paramName == null || paramName.Length == 0)
					paramName = "param" + index.ToString(CultureInfo.InvariantCulture);
 
 				FieldDirection fieldDir = FieldDirection.In;
 
				// check for the '&' that means ref (gotta love it!) 
 				// and we need to strip that & before we continue.  Ouch.
 				if (paramType.IsByRef) 
				{
 					if (paramType.FullName.EndsWith("&"))
					{
						// strip the & and reload the type without it. 
						paramType = paramType.Assembly.GetType(paramType.FullName.Substring(0, paramType.FullName.Length - 1), true);
 					} 
					fieldDir = FieldDirection.Ref; 
 				}
 				if (argTypes[index].IsOut) 
				{
 					if (argTypes[index].IsIn)
						fieldDir = FieldDirection.Ref;
					else 
						fieldDir = FieldDirection.Out;
 				} 
				parameters[index] = new CodeParameterDeclarationExpression(new CodeTypeReference(paramType), paramName); 
 				parameters[index].Direction = fieldDir;
 				parameterTypes[index] = paramType; 
			}
 			this.returnType = new CodeTypeReference(method.ReturnType);
		}
		public override bool Equals(object other) 
		{
 			if (other == null) 
				return false; 

 			DelegateTypeInfo dtiOther = other as DelegateTypeInfo; 

 			if (dtiOther == null)
				return false;
 
 			if (ReturnType.BaseType != dtiOther.ReturnType.BaseType || Parameters.Length != dtiOther.Parameters.Length)
				return false; 
 
			for (int parameter = 0; parameter < Parameters.Length; parameter++)
			{ 
 				CodeParameterDeclarationExpression otherParam = dtiOther.Parameters[parameter];
				if (otherParam.Type.BaseType != Parameters[parameter].Type.BaseType)
 					return false;
 			} 
			return true;
 		} 
		public override int GetHashCode() 
		{
			return base.GetHashCode(); 
 		}
	}
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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