pub/bltoolkit: Source/Reflection/TypeHelper.cs comparison

comparison Source/Reflection/TypeHelper.cs @ 0:f990fcb411a9

Копия текущей версии из github

author	cin
date	Thu, 27 Mar 2014 21:46:09 +0400
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--1:000000000000
+:f990fcb411a9
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Xml;
+#if !SILVERLIGHT
+using System.Xml.Linq;
+#endif
+namespace BLToolkit.Reflection
+{
+#if !SILVERLIGHT && !DATA
+	using EditableObjects;
+#endif
+	using DataAccess;
+	using TypeBuilder;
+	/// <summary>
+	/// A wrapper around the <see cref="Type"/> class.
+	/// </summary>
+	[System.Diagnostics.DebuggerDisplay("Type = {Type}")]
+	public class TypeHelper
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="TypeHelper"/> class.
+		/// </summary>
+		/// <param name="type">The Type to wrap.</param>
+		public TypeHelper(Type type)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			Type = type;
+		}
+		/// <summary>
+		/// Gets associated Type.
+		/// </summary>
+		public Type Type { get; private set; }
+		/// <summary>
+		/// Converts the supplied <see cref="Type"/> to a <see cref="TypeHelper"/>.
+		/// </summary>
+		/// <param name="type">The Type.</param>
+		/// <returns>A TypeHelper.</returns>
+		public static implicit operator TypeHelper(Type type)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			return new TypeHelper(type);
+		}
+		/// <summary>
+		/// Converts the supplied <see cref="TypeHelper"/> to a <see cref="Type"/>.
+		/// </summary>
+		/// <param name="typeHelper">The TypeHelper.</param>
+		/// <returns>A Type.</returns>
+		public static implicit operator Type(TypeHelper typeHelper)
+		{
+			if (typeHelper == null) throw new ArgumentNullException("typeHelper");
+			return typeHelper.Type;
+		}
+		#region GetAttributes
+		/// <summary>
+		/// Returns an array of custom attributes identified by <b>Type</b>.
+		/// </summary>
+		/// <param name="attributeType">The type of attribute to search for.
+		/// Only attributes that are assignable to this type are returned.</param>
+		/// <param name="inherit">Specifies whether to search this member's inheritance chain
+		/// to find the attributes.</param>
+		/// <returns>An array of custom attributes defined on this reflected member,
+		/// or an array with zero (0) elements if no attributes are defined.</returns>
+		public object[] GetCustomAttributes(Type attributeType, bool inherit)
+		{
+			return Type.GetCustomAttributes(attributeType, inherit);
+		}
+		/// <summary>
+		/// Returns an array of custom attributes identified by <b>Type</b>
+		/// including attribute's inheritance chain.
+		/// </summary>
+		/// <param name="attributeType">The type of attribute to search for.
+		/// Only attributes that are assignable to this type are returned.</param>
+		/// <returns>An array of custom attributes defined on this reflected member,
+		/// or an array with zero (0) elements if no attributes are defined.</returns>
+		public object[] GetCustomAttributes(Type attributeType)
+		{
+			return Type.GetCustomAttributes(attributeType, true);
+		}
+		/// <summary>
+		/// Returns an array of all of the custom attributes.
+		/// </summary>
+		/// <param name="inherit">Specifies whether to search this member's inheritance chain
+		/// to find the attributes.</param>
+		/// <returns>An array of custom attributes defined on this reflected member,
+		/// or an array with zero (0) elements if no attributes are defined.</returns>
+		public object[] GetCustomAttributes(bool inherit)
+		{
+			return Type.GetCustomAttributes(inherit);
+		}
+		/// <summary>
+		/// Returns an array of all of the custom attributes including attributes' inheritance chain.
+		/// </summary>
+		/// <returns>An array of custom attributes defined on this reflected member,
+		/// or an array with zero (0) elements if no attributes are defined.</returns>
+		public object[] GetCustomAttributes()
+		{
+			return Type.GetCustomAttributes(true);
+		}
+		/// <summary>
+		/// Returns an array of all custom attributes identified by <b>Type</b> including type's
+		/// inheritance chain.
+		/// </summary>
+		/// <param name="attributeType">The type of attribute to search for.
+		/// Only attributes that are assignable to this type are returned.</param>
+		/// <returns>An array of custom attributes defined on this reflected member,
+		/// or an array with zero (0) elements if no attributes are defined.</returns>
+		public object[] GetAttributes(Type attributeType)
+		{
+			return GetAttributes(Type, attributeType);
+		}
+		/// <summary>
+		/// Returns an array of all custom attributes including type's inheritance chain.
+		/// </summary>
+		/// <returns>An array of custom attributes defined on this reflected member,
+		/// or an array with zero (0) elements if no attributes are defined.</returns>
+		public object[] GetAttributes()
+		{
+			return GetAttributesInternal();
+		}
+		#region Attributes cache
+		object[] GetAttributesInternal()
+		{
+			lock (_typeAttributes)
+			{
+				var key = Type.FullName;
+				object[] attrs;
+				if (!_typeAttributes.TryGetValue(key, out attrs))
+				{
+					var list = new List<object>();
+					GetAttributesInternal(list, Type);
+					_typeAttributes.Add(key, attrs = list.ToArray());
+				}
+				return attrs;
+			}
+		}
+		static readonly Dictionary<Type,object[]> _typeAttributesTopInternal = new Dictionary<Type,object[]>(10);
+		static void GetAttributesInternal(List<object> list, Type type)
+		{
+			object[] attrs;
+			if (_typeAttributesTopInternal.TryGetValue(type, out attrs))
+				list.AddRange(attrs);
+			else
+			{
+				GetAttributesTreeInternal(list, type);
+				_typeAttributesTopInternal.Add(type, list.ToArray());
+			}
+		}
+		static readonly Dictionary<Type,object[]> _typeAttributesInternal = new Dictionary<Type,object[]>(10);
+		static void GetAttributesTreeInternal(List<object> list, Type type)
+		{
+			object[] attrs;
+			if (!_typeAttributesInternal.TryGetValue(type, out attrs))
+				_typeAttributesInternal.Add(type, attrs = type.GetCustomAttributes(false));
+			if (Common.Configuration.FilterOutBaseEqualAttributes)
+			{
+				foreach (var t in attrs)
+					if (!list.Contains(t))
+						list.Add(t);
+			}
+			else
+				list.AddRange(attrs);
+			if (type.IsInterface)
+				return;
+			// Reflection returns interfaces for the whole inheritance chain.
+			// So, we are going to get some hemorrhoid here to restore the inheritance sequence.
+			//
+			var interfaces      = type.GetInterfaces();
+			var nBaseInterfaces = type.BaseType != null? type.BaseType.GetInterfaces().Length: 0;
+			for (var i = 0; i < interfaces.Length; i++)
+			{
+				var intf = interfaces[i];
+				if (i < nBaseInterfaces)
+				{
+					var getAttr = false;
+					foreach (var mi in type.GetInterfaceMap(intf).TargetMethods)
+					{
+						// Check if the interface is reimplemented.
+						//
+						if (mi.DeclaringType == type)
+						{
+							getAttr = true;
+							break;
+						}
+					}
+					if (getAttr == false)
+						continue;
+				}
+				GetAttributesTreeInternal(list, intf);
+			}
+			if (type.BaseType != null && type.BaseType != typeof(object))
+				GetAttributesTreeInternal(list, type.BaseType);
+		}
+		static readonly Dictionary<string,object[]> _typeAttributes = new Dictionary<string, object[]>(10);
+		#endregion
+		/// <summary>
+		/// Returns an array of custom attributes applied to a type.
+		/// </summary>
+		/// <param name="type">A type instance.</param>
+		/// <param name="attributeType">The type of attribute to search for.
+		/// Only attributes that are assignable to this type are returned.</param>
+		/// <returns>An array of custom attributes applied to this type,
+		/// or an array with zero (0) elements if no attributes have been applied.</returns>
+		public static object[] GetAttributes(Type type, Type attributeType)
+		{
+			if (type          == null) throw new ArgumentNullException("type");
+			if (attributeType == null) throw new ArgumentNullException("attributeType");
+			lock (_typeAttributes)
+			{
+				var key   = type.FullName + "#" + attributeType.FullName;
+				object[] attrs;
+				if (!_typeAttributes.TryGetValue(key, out attrs))
+				{
+					var list = new List<object>();
+					GetAttributesInternal(list, type);
+					for (var i = 0; i < list.Count; i++)
+						if (attributeType.IsInstanceOfType(list[i]) == false)
+							list.RemoveAt(i--);
+					_typeAttributes.Add(key, attrs = list.ToArray());
+				}
+				return attrs;
+			}
+		}
+		/// <summary>
+		/// Retrieves a custom attribute applied to a type.
+		/// </summary>
+		/// <param name="type">A type instance.</param>
+		/// <param name="attributeType">The type of attribute to search for.
+		/// Only attributes that are assignable to this type are returned.</param>
+		/// <returns>A reference to the first custom attribute of type <paramref name="attributeType"/>
+		/// that is applied to element, or null if there is no such attribute.</returns>
+		public static Attribute GetFirstAttribute(Type type, Type attributeType)
+		{
+			var attrs = new TypeHelper(type).GetAttributes(attributeType);
+			return attrs.Length > 0? (Attribute)attrs[0]: null;
+		}
+		/// <summary>
+		/// Retrieves a custom attribute applied to a type.
+		/// </summary>
+		/// <param name="type">A type instance.</param>
+		/// <typeparam name="T">The type of attribute to search for.
+		/// Only attributes that are assignable to this type are returned.</param>
+		/// <returns>A reference to the first custom attribute of type attributeType
+		/// that is applied to element, or null if there is no such attribute.</returns>
+		public static T GetFirstAttribute<T>(Type type) where T : Attribute
+		{
+			var attrs = new TypeHelper(type).GetAttributes(typeof(T));
+			return attrs.Length > 0? (T)attrs[0]: null;
+		}
+		#endregion
+		#region Property Wrappers
+		/// <summary>
+		/// Gets the fully qualified name of the Type, including the namespace of the Type.
+		/// </summary>
+		public string FullName
+		{
+			get { return Type.FullName; }
+		}
+		/// <summary>
+		/// Gets the name of the Type.
+		/// </summary>
+		public string Name
+		{
+			get { return Type.Name; }
+		}
+		/// <summary>
+		/// Gets a value indicating whether the Type is abstract and must be overridden.
+		/// </summary>
+		public bool IsAbstract
+		{
+			get { return Type.IsAbstract; }
+		}
+		/// <summary>
+		/// Gets a value indicating whether the System.Type is an array.
+		/// </summary>
+		public bool IsArray
+		{
+			get { return Type.IsArray; }
+		}
+		/// <summary>
+		/// Gets a value indicating whether the Type is a value type.
+		/// </summary>
+		public bool IsValueType
+		{
+			get { return Type.IsValueType; }
+		}
+		/// <summary>
+		/// Gets a value indicating whether the Type is a class; that is, not a value type or interface.
+		/// </summary>
+		public bool IsClass
+		{
+			get { return Type.IsClass; }
+		}
+		/// <summary>
+		/// Gets a value indicating whether the System.Type is an interface; that is, not a class or a value type.
+		/// </summary>
+		public bool IsInterface
+		{
+			get { return Type.IsInterface; }
+		}
+		/// <summary>
+		/// Indicates whether the Type is serializable.
+		/// </summary>
+		public bool IsSerializable
+		{
+			get
+			{
+#if SILVERLIGHT
+				return false;
+#else
+				return Type.IsSerializable;
+#endif
+			}
+		}
+		#endregion
+		#region GetMethods
+		/// <summary>
+		/// Returns all the methods of the current Type.
+		/// </summary>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all methods
+		/// defined for the current Type.</returns>
+		public MethodInfo[] GetMethods()
+		{
+			return Type.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		/// <summary>
+		/// Returns all the public methods of the current Type.
+		/// </summary>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all the public methods
+		/// defined for the current Type.</returns>
+		public MethodInfo[] GetPublicMethods()
+		{
+			return Type.GetMethods(BindingFlags.Instance | BindingFlags.Public);
+		}
+		/// <summary>
+		/// Searches for the methods defined for the current Type,
+		/// using the specified binding constraints.
+		/// </summary>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all methods defined
+		/// for the current Type that match the specified binding constraints.</returns>
+		public MethodInfo[] GetMethods(BindingFlags flags)
+		{
+			return Type.GetMethods(flags);
+		}
+		/// <summary>
+		/// Returns all the generic or non-generic methods of the current Type.
+		/// </summary>
+		/// <param name="generic">True to return all generic methods, false to return all non-generic.</param>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all methods
+		/// defined for the current Type.</returns>
+		public MethodInfo[] GetMethods(bool generic)
+		{
+			return GetMethods(Type, generic, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		/// <summary>
+		/// Returns all the public and non-generic methods of the current Type.
+		/// </summary>
+		/// <param name="generic">True to return all generic methods, false to return all non-generic.</param>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all the public methods
+		/// defined for the current Type.</returns>
+		public MethodInfo[] GetPublicMethods(bool generic)
+		{
+			return GetMethods(Type, generic, BindingFlags.Instance | BindingFlags.Public);
+		}
+		/// <summary>
+		/// Searches for the generic methods defined for the current Type,
+		/// using the specified binding constraints.
+		/// </summary>
+		/// <param name="generic">True to return all generic methods, false to return all non-generic.</param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all methods defined
+		/// for the current Type that match the specified binding constraints.</returns>
+		public MethodInfo[] GetMethods(bool generic, BindingFlags flags)
+		{
+			return GetMethods(Type, generic, flags);
+		}
+		#endregion
+		#region GetMethod
+		/// <summary>
+		/// Searches for the specified instance method (public or non-public), using the specified name.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified name, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(string methodName)
+		{
+			return Type.GetMethod(methodName,
+				BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		/// <summary>
+		/// Searches for the specified public instance method, using the specified name.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified name, if found; otherwise, null.</returns>
+		public MethodInfo GetPublicMethod(string methodName)
+		{
+			return Type.GetMethod(methodName,
+				BindingFlags.Instance | BindingFlags.Public);
+		}
+		/// <summary>
+		/// Searches for the specified method, using the specified name and binding flags.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(string methodName, BindingFlags flags)
+		{
+			return Type.GetMethod(methodName, flags);
+		}
+		/// <summary>
+		/// Searches for the specified public instance method, using the specified name.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="types">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetPublicMethod(string methodName, params Type[] types)
+		{
+			return Type.GetMethod(
+				methodName,
+				BindingFlags.Instance | BindingFlags.Public,
+				null,
+				types,
+				null);
+		}
+		/// <summary>
+		/// Searches for the specified instance method (public or non-public),
+		/// using the specified name and argument types.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="types">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(string methodName, params Type[] types)
+		{
+			return Type.GetMethod(
+				methodName,
+				BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
+				null,
+				types,
+				null);
+		}
+		/// <summary>
+		/// Searches for the specified method, using the specified name,
+		/// binding flags and argument types.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="types">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(string methodName, BindingFlags flags, params Type[] types)
+		{
+			return Type.GetMethod(methodName, flags, null, types, null);
+		}
+		/// <summary>
+		/// Searches for the specified instance method (public or non-public), using the specified name.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(bool generic, string methodName)
+		{
+			return GetMethod(Type, generic, methodName,
+				BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		/// <summary>
+		/// Searches for the specified public instance method, using the specified name.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetPublicMethod(bool generic, string methodName)
+		{
+			return GetMethod(Type, generic, methodName,
+				BindingFlags.Instance | BindingFlags.Public);
+		}
+		/// <summary>
+		/// Searches for the specified method, using the specified name and binding flags.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(bool generic, string methodName, BindingFlags flags)
+		{
+			return GetMethod(Type, generic, methodName, flags);
+		}
+		/// <summary>
+		/// Searches for the specified public instance method, using the specified name and argument types.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <param name="types">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetPublicMethod(bool generic, string methodName, params Type[] types)
+		{
+			return Type.GetMethod(methodName,
+				BindingFlags.Instance | BindingFlags.Public,
+				generic ? GenericBinder.Generic : GenericBinder.NonGeneric,
+				types, null);
+		}
+		/// <summary>
+		/// Searches for the specified instance method (public or non-public),
+		/// using the specified name and argument types.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <param name="types">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(bool generic, string methodName, params Type[] types)
+		{
+			return Type.GetMethod(methodName,
+				BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
+				generic ? GenericBinder.Generic : GenericBinder.NonGeneric,
+				types, null);
+		}
+		/// <summary>
+		/// Searches for the specified method using the specified name, binding flags and argument types.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <param name="types">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public MethodInfo GetMethod(bool generic, string methodName, BindingFlags flags, params Type[] types)
+		{
+			return Type.GetMethod(methodName,
+				flags,
+				generic ? GenericBinder.Generic : GenericBinder.NonGeneric,
+				types, null);
+		}
+		#endregion
+		#region GetFields
+		/// <summary>
+		/// Returns all the public fields of the current Type.
+		/// </summary>
+		/// <returns>An array of <see cref="FieldInfo"/> objects representing
+		/// all the public fields defined for the current Type.</returns>
+		public FieldInfo[] GetFields()
+		{
+			return Type.GetFields();
+		}
+		/// <summary>
+		/// Searches for the fields of the current Type, using the specified binding constraints.
+		/// </summary>
+		/// <param name="bindingFlags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>An array of <see cref="FieldInfo"/> objects representing
+		/// all fields of the current Type
+		/// that match the specified binding constraints.</returns>
+		public FieldInfo[] GetFields(BindingFlags bindingFlags)
+		{
+			return Type.GetFields(bindingFlags);
+		}
+		/// <summary>
+		/// Searches for the public field with the specified name.
+		/// </summary>
+		/// <param name="name">The String containing the name of the public field to get.</param>
+		/// <returns>A <see cref="PropertyInfo"/> object representing the public field with the specified name,
+		/// if found; otherwise, a null reference.</returns>
+		public FieldInfo GetField(string name)
+		{
+			return Type.GetField(
+				name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		#endregion
+		#region GetProperties
+		/// <summary>
+		/// Returns all the public properties of the current Type.
+		/// </summary>
+		/// <returns>An array of <see cref="PropertyInfo"/> objects representing
+		/// all public properties of the current Type.</returns>
+		public PropertyInfo[] GetProperties()
+		{
+			return Type.GetProperties();
+		}
+		/// <summary>
+		/// Searches for the properties of the current Type, using the specified binding constraints.
+		/// </summary>
+		/// <param name="bindingFlags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>An array of <see cref="PropertyInfo"/> objects representing
+		/// all properties of the current Type
+		/// that match the specified binding constraints.</returns>
+		public PropertyInfo[] GetProperties(BindingFlags bindingFlags)
+		{
+			return Type.GetProperties(bindingFlags);
+		}
+		/// <summary>
+		/// Searches for the public property with the specified name.
+		/// </summary>
+		/// <param name="name">The String containing the name of the public property to get.</param>
+		/// <returns>A <see cref="PropertyInfo"/> object representing the public property with the specified name,
+		/// if found; otherwise, a null reference.</returns>
+		public PropertyInfo GetProperty(string name)
+		{
+			return Type.GetProperty(
+				name, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		#endregion
+		#region GetInterfaces
+		/*
+		private Type[] _interfaces;
+		/// <summary>
+		/// Gets all the interfaces implemented or inherited by the current <see cref="Type"/>.
+		/// </summary>
+		/// <returns>An array of Type objects representing all the interfaces implemented or
+		/// inherited by the current Type,
+		/// if found; otherwise, an empty array.</returns>
+		public Type[] GetInterfaces()
+		{
+			if (_interfaces == null)
+				_interfaces = _type.GetInterfaces();
+			return _interfaces;
+		}
+		/// <summary>
+		/// Gets a specific interface implemented or inherited by the current <see cref="Type"/>.
+		/// </summary>
+		/// <param name="interfaceType">The type of the interface to get.</param>
+		/// <returns>A Type object representing the interface of the specified type, if found;
+		///  otherwise, a null reference (Nothing in Visual Basic).</returns>
+		public Type GetInterface(Type interfaceType)
+		{
+			foreach (Type intf in GetInterfaces())
+				if (intf == interfaceType)
+					return null;
+			_type.IsSubclassOf(interfaceType);
+			return null;
+		}
+		*/
+		/// <summary>
+		/// Returns an interface mapping for the current <see cref="Type"/>.
+		/// </summary>
+		/// <param name="interfaceType">The <see cref="System.Type"/>
+		/// of the interface of which to retrieve a mapping.</param>
+		/// <returns>An <see cref="InterfaceMapping"/> object representing the interface
+		/// mapping for <paramref name="interfaceType"/>.</returns>
+		public InterfaceMapping GetInterfaceMap(Type interfaceType)
+		{
+			return Type.GetInterfaceMap(interfaceType);
+		}
+		#endregion
+		#region GetConstructor
+		/// <summary>
+		/// Searches for a public instance constructor whose parameters match
+		/// the types in the specified array.
+		/// </summary>
+		/// <param name="types">An array of Type objects representing the number,
+		/// order, and type of the parameters for the constructor to get.</param>
+		/// <returns>A <see cref="ConstructorInfo"/> object representing the
+		/// public instance constructor whose parameters match the types in
+		/// the parameter type array, if found; otherwise, a null reference.</returns>
+		public ConstructorInfo GetPublicConstructor(params Type[] types)
+		{
+			return Type.GetConstructor(types);
+		}
+		/// <summary>
+		/// Searches for an instance constructor (public or non-public) whose
+		/// parameters match the types in the specified array.
+		/// </summary>
+		/// <param name="parameterType">Type object representing type of the
+		/// parameter for the constructor to get.</param>
+		/// <returns>A <see cref="ConstructorInfo"/> object representing the constructor
+		///  whose parameters match the types in the parameter type array, if found;
+		/// otherwise, a null reference.</returns>
+		public ConstructorInfo GetConstructor(Type parameterType)
+		{
+			return GetConstructor(Type, parameterType);
+		}
+		/// <summary>
+		/// Searches for an instance constructor (public or non-public) whose
+		/// parameters match the types in the specified array.
+		/// </summary>
+		/// <param name="type">An instance of <see cref="System.Type"/> to search constructor for.</param>
+		/// <param name="types">An array of Type objects representing the number,
+		/// order, and type of the parameters for the constructor to get.</param>
+		/// <returns>A <see cref="ConstructorInfo"/> object representing the constructor
+		///  whose parameters match the types in the parameter type array, if found;
+		/// otherwise, a null reference.</returns>
+		public static ConstructorInfo GetConstructor(Type type, params Type[] types)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			return type.GetConstructor(
+				BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
+				null,
+				types,
+				null);
+		}
+		/// <summary>
+		/// Searches for a public default constructor.
+		/// </summary>
+		/// <returns>A <see cref="ConstructorInfo"/> object representing the constructor.</returns>
+		public ConstructorInfo GetPublicDefaultConstructor()
+		{
+			return Type.GetConstructor(Type.EmptyTypes);
+		}
+		/// <summary>
+		/// Searches for a default constructor.
+		/// </summary>
+		/// <returns>A <see cref="ConstructorInfo"/> object representing the constructor.</returns>
+		public ConstructorInfo GetDefaultConstructor()
+		{
+			return GetDefaultConstructor(Type);
+		}
+		/// <summary>
+		/// Searches for a default constructor.
+		/// </summary>
+		/// <param name="type">An instance of <see cref="System.Type"/> to search constructor for.</param>
+		/// <returns>A <see cref="ConstructorInfo"/> object representing the constructor.</returns>
+		public static ConstructorInfo GetDefaultConstructor(Type type)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			return type.GetConstructor(
+				BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
+				null,
+				Type.EmptyTypes,
+				null);
+		}
+		/// <summary>
+		/// Searches for a public constructors.
+		/// </summary>
+		/// <returns>An array of <see cref="ConstructorInfo"/> objects
+		/// representing all the type public constructors, if found; otherwise, an empty array.</returns>
+		public ConstructorInfo[] GetPublicConstructors()
+		{
+			return Type.GetConstructors();
+		}
+		/// <summary>
+		/// Searches for all constructors (except type constructors).
+		/// </summary>
+		/// <returns>An array of <see cref="ConstructorInfo"/> objects
+		/// representing all the type constructors, if found; otherwise, an empty array.</returns>
+		public ConstructorInfo[] GetConstructors()
+		{
+			return Type.GetConstructors(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+		}
+		#endregion
+		#region Static Members
+		/// <summary>
+		/// Gets a value indicating whether a type (or type's element type)
+		/// instance can be null in the underlying data store.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <returns> True, if the type parameter is a closed generic nullable type; otherwise, False.</returns>
+		/// <remarks>Arrays of Nullable types are treated as Nullable types.</remarks>
+		public static bool IsNullable(Type type)
+		{
+			while (type.IsArray)
+				type = type.GetElementType();
+			return (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>));
+		}
+		public static bool IsNullableType(Type type)
+		{
+			return (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>));
+		}
+		public static bool IsNullableEnum(Type type)
+		{
+			return IsNullableType(type) && type.GetGenericArguments()[0].IsEnum;
+		}
+		public static bool IsEnumOrNullableEnum(Type type)
+		{
+			return type.IsEnum || IsNullableEnum(type);
+		}
+		public static Type ToNullable(Type type)
+		{
+			if (!IsNullable(type) && type.IsValueType)
+			{
+				var nullable = typeof(Nullable<>);
+				var typeArguments = nullable.GetGenericArguments();
+				if (typeArguments != null && typeArguments.Length == 1)
+				{
+					type = nullable.MakeGenericType(type);
+				}
+			}
+			return type;
+		}
+		/// <summary>
+		/// Returns the underlying type argument of the specified type.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <returns><list>
+		/// <item>The type argument of the type parameter,
+		/// if the type parameter is a closed generic nullable type.</item>
+		/// <item>The underlying Type if the type parameter is an enum type.</item>
+		/// <item>Otherwise, the type itself.</item>
+		/// </list>
+		/// </returns>
+		public static Type GetUnderlyingType(Type type)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			if (IsNullableType(type))
+				type = type.GetGenericArguments()[0];
+			if (type.IsEnum)
+				type = Enum.GetUnderlyingType(type);
+			return type;
+		}
+		public static Type UnwrapNullableType(Type type)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			return IsNullableType(type) ? type.GetGenericArguments()[0] : type;
+		}
+		public static IEnumerable<Type> GetDefiningTypes(Type child, MemberInfo member)
+		{
+			if (member.MemberType == MemberTypes.Property)
+			{
+				var prop = (PropertyInfo)member;
+				member = prop.GetGetMethod();
+			}
+			foreach (var inf in child.GetInterfaces())
+			{
+				var pm = child.GetInterfaceMap(inf);
+				for (var i = 0; i < pm.TargetMethods.Length; i++)
+				{
+					var method = pm.TargetMethods[i];
+					if (method == member || (method.DeclaringType == member.DeclaringType && method.Name == member.Name))
+						yield return inf;
+				}
+			}
+			yield return member.DeclaringType;
+		}
+		public static bool IsAbstractClass(Type type)
+		{
+			return type.IsClass && type.IsAbstract;
+		}
+		/// <summary>
+		/// Determines whether the specified types are considered equal.
+		/// </summary>
+		/// <param name="parent">A <see cref="System.Type"/> instance. </param>
+		/// <param name="child">A type possible derived from the <c>parent</c> type</param>
+		/// <returns>True, when an object instance of the type <c>child</c>
+		/// can be used as an object of the type <c>parent</c>; otherwise, false.</returns>
+		/// <remarks>Note that nullable types does not have a parent-child relation to it's underlying type.
+		/// For example, the 'int?' type (nullable int) and the 'int' type
+		/// aren't a parent and it's child.</remarks>
+		public static bool IsSameOrParent([JetBrains.Annotations.NotNull] Type parent, [JetBrains.Annotations.NotNull] Type child)
+		{
+			if (parent == null) throw new ArgumentNullException("parent");
+			if (child  == null) throw new ArgumentNullException("child");
+			if (parent == child ||
+				child.IsEnum && Enum.GetUnderlyingType(child) == parent ||
+				child.IsSubclassOf(parent))
+			{
+				return true;
+			}
+			if (parent.IsGenericTypeDefinition)
+				for (var t = child; t != typeof(object) && t != null; t = t.BaseType)
+					if (t.IsGenericType && t.GetGenericTypeDefinition() == parent)
+						return true;
+			if (parent.IsInterface)
+			{
+				var interfaces = child.GetInterfaces();
+				foreach (var t in interfaces)
+				{
+					if (parent.IsGenericTypeDefinition)
+					{
+						if (t.IsGenericType && t.GetGenericTypeDefinition() == parent)
+							return true;
+					}
+					else if (t == parent)
+						return true;
+				}
+			}
+			return false;
+		}
+		public static Type GetGenericType([JetBrains.Annotations.NotNull] Type genericType, Type type)
+		{
+			if (genericType == null) throw new ArgumentNullException("genericType");
+			while (type != null && type != typeof(object))
+			{
+				if (type.IsGenericType && type.GetGenericTypeDefinition() == genericType)
+					return type;
+				if (genericType.IsInterface)
+				{
+					foreach (var interfaceType in type.GetInterfaces())
+					{
+						var gType = GetGenericType(genericType, interfaceType);
+						if (gType != null)
+							return gType;
+					}
+				}
+				type = type.BaseType;
+			}
+			return null;
+		}
+		/// <summary>
+		/// Searches for the method defined for a <see cref="System.Type"/>,
+		/// using the specified name and binding flags.
+		/// </summary>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="generic">True to search only for a generic method, or
+		/// False to search only for non-generic method.</param>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public static MethodInfo GetMethod([JetBrains.Annotations.NotNull] Type type, bool generic, string methodName, BindingFlags flags)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			foreach (var method in type.GetMethods(flags))
+				if (method.IsGenericMethodDefinition == generic && method.Name == methodName)
+					return method;
+			return null;
+		}
+		/// <summary>
+		/// Searches for the methods defined for a <see cref="System.Type"/>,
+		/// using the specified name and binding flags.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <param name="generic">True to return all generic methods, false to return all non-generic.</param>
+		/// <param name="flags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <returns>An array of <see cref="MethodInfo"/> objects representing all methods defined
+		/// for the current Type that match the specified binding constraints.</returns>
+		public static MethodInfo[] GetMethods(Type type, bool generic, BindingFlags flags)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			return type.GetMethods(flags).Where(method => method.IsGenericMethodDefinition == generic).ToArray();
+		}
+		/// <summary>
+		/// Searches for the method defined for a <see cref="System.Type"/>,
+		/// using the specified name and binding flags.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <param name="methodName">The String containing the name of the method to get.</param>
+		/// <param name="requiredParametersCount">Number of required (non optional)
+		/// parameter types.</param>
+		/// <param name="bindingFlags">A bitmask comprised of one or more <see cref="BindingFlags"/>
+		/// that specify how the search is conducted.</param>
+		/// <param name="parameterTypes">An array of <see cref="System.Type"/> objects representing
+		/// the number, order, and type of the parameters for the method to get.-or-
+		/// An empty array of the type <see cref="System.Type"/> (for example, <see cref="System.Type.EmptyTypes"/>)
+		/// to get a method that takes no parameters.</param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public static MethodInfo GetMethod(
+			Type          type,
+			string        methodName,
+			BindingFlags  bindingFlags,
+			int           requiredParametersCount,
+			params Type[] parameterTypes)
+		{
+			while (parameterTypes.Length >= requiredParametersCount)
+			{
+				var method = type.GetMethod(methodName, parameterTypes);
+				if (null != method)
+					return method;
+				if (parameterTypes.Length == 0)
+					break;
+				Array.Resize(ref parameterTypes, parameterTypes.Length - 1);
+			}
+			return null;
+		}
+		[SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
+		public static object[] GetPropertyParameters(PropertyInfo propertyInfo)
+		{
+			if (propertyInfo == null) throw new ArgumentNullException("propertyInfo");
+			var attrs = propertyInfo.GetCustomAttributes(typeof(ParameterAttribute), true);
+			if (attrs != null && attrs.Length > 0)
+				return ((ParameterAttribute)attrs[0]).Parameters;
+			attrs = propertyInfo.GetCustomAttributes(typeof(InstanceTypeAttribute), true);
+			if (attrs.Length > 0)
+				return ((InstanceTypeAttribute)attrs[0]).Parameters;
+			attrs = new TypeHelper(
+				propertyInfo.DeclaringType).GetAttributes(typeof(GlobalInstanceTypeAttribute));
+			foreach (GlobalInstanceTypeAttribute attr in attrs)
+				if (IsSameOrParent(attr.PropertyType, propertyInfo.PropertyType))
+//				if (attr.PropertyType == propertyInfo.PropertyType)
+					return attr.Parameters;
+			return null;
+		}
+		/// <summary>
+		/// Searches for the property defined for a <see cref="System.Type"/>,
+		/// using the specified name and parameter types.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <param name="propertyName">The String containing the name of the method to get.</param>
+		/// <param name="types">An array of Type objects representing the number,
+		/// order, and type of the parameters for the constructor to get.</param>
+		/// <param name="returnType">The property return <see cref="System.Type"/>. </param>
+		/// <returns>A <see cref="MethodInfo"/> object representing the method
+		/// that matches the specified requirements, if found; otherwise, null.</returns>
+		public static PropertyInfo GetPropertyInfo(
+			Type type, string propertyName, Type returnType, Type[] types)
+		{
+			if (type == null) throw new ArgumentNullException("type");
+			return type.GetProperty(
+				propertyName,
+				BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance,
+				null,
+				returnType,
+				types,
+				null);
+		}
+		///<summary>
+		/// Gets the Type of a list item.
+		///</summary>
+		/// <param name="list">A <see cref="System.Object"/> instance. </param>
+		///<returns>The Type instance that represents the exact runtime type of a list item.</returns>
+		public static Type GetListItemType(object list)
+		{
+			var typeOfObject = typeof(object);
+			if (list == null)
+				return typeOfObject;
+#if !SILVERLIGHT && !DATA
+			if (list is EditableArrayList)
+				return ((EditableArrayList)list).ItemType;
+#endif
+			if (list is Array)
+				return list.GetType().GetElementType();
+			var type = list.GetType();
+			// object[] attrs = type.GetCustomAttributes(typeof(DefaultMemberAttribute), true);
+			// string   itemMemberName = (attrs.Length == 0)? "Item": ((DefaultMemberAttribute)attrs[0]).MemberName;
+			if (list is IList
+#if !SILVERLIGHT
+				|| list is ITypedList || list is IListSource
+#endif
+				)
+			{
+				PropertyInfo last = null;
+				foreach (var pi in type.GetProperties())
+				{
+					if (pi.GetIndexParameters().Length > 0 && pi.PropertyType != typeOfObject)
+					{
+						if (pi.Name == "Item")
+							return pi.PropertyType;
+						last = pi;
+					}
+				}
+				if (last != null)
+					return last.PropertyType;
+			}
+			try
+			{
+				if (list is IList)
+				{
+					foreach (var o in (IList)list)
+						if (o != null && o.GetType() != typeOfObject)
+							return o.GetType();
+				}
+				else if (list is IEnumerable)
+				{
+					foreach (var o in (IEnumerable)list)
+						if (o != null && o.GetType() != typeOfObject)
+							return o.GetType();
+				}
+			}
+			catch
+			{
+			}
+			return typeOfObject;
+		}
+		///<summary>
+		/// Gets the Type of a list item.
+		///</summary>
+		/// <param name="listType">A <see cref="System.Type"/> instance. </param>
+		///<returns>The Type instance that represents the exact runtime type of a list item.</returns>
+		public static Type GetListItemType(Type listType)
+		{
+			if (listType.IsGenericType)
+			{
+				var elementTypes = GetGenericArguments(listType, typeof(IList));
+				if (elementTypes != null)
+					return elementTypes[0];
+			}
+			if (IsSameOrParent(typeof(IList),       listType)
+#if !SILVERLIGHT
+				|| IsSameOrParent(typeof(ITypedList),  listType)
+				|| IsSameOrParent(typeof(IListSource), listType)
+#endif
+				)
+			{
+				var elementType = listType.GetElementType();
+				if (elementType != null)
+					return elementType;
+				PropertyInfo last = null;
+				foreach (var pi in listType.GetProperties())
+				{
+					if (pi.GetIndexParameters().Length > 0 && pi.PropertyType != typeof(object))
+					{
+						if (pi.Name == "Item")
+							return pi.PropertyType;
+						last = pi;
+					}
+				}
+				if (last != null)
+					return last.PropertyType;
+			}
+			return typeof(object);
+		}
+		public static Type GetElementType(Type type)
+		{
+			if (type == null)
+				return null;
+			if (type == typeof(object))
+				return type.HasElementType ? type.GetElementType(): null;
+			if (type.IsArray)
+				return type.GetElementType();
+			if (type.IsGenericType)
+				foreach (var aType in type.GetGenericArguments())
+					if (typeof(IEnumerable<>).MakeGenericType(new[] { aType }).IsAssignableFrom(type))
+						return aType;
+			var interfaces = type.GetInterfaces();
+			if (interfaces != null && interfaces.Length > 0)
+			{
+				foreach (var iType in interfaces)
+				{
+					var eType = GetElementType(iType);
+					if (eType != null)
+						return eType;
+				}
+			}
+			return GetElementType(type.BaseType);
+		}
+		/// <summary>
+		/// Gets a value indicating whether a type can be used as a db primitive.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance. </param>
+		/// <returns> True, if the type parameter is a primitive type; otherwise, False.</returns>
+		/// <remarks><see cref="System.String"/>. <see cref="Stream"/>.
+		/// <see cref="XmlReader"/>. <see cref="XmlDocument"/>. are specially handled by the library
+		/// and, therefore, can be treated as scalar types.</remarks>
+		public static bool IsScalar(Type type)
+		{
+			while (type.IsArray)
+				type = type.GetElementType();
+			return type.IsValueType
+				|| type == typeof(string)
+				|| type == typeof(System.Data.Linq.Binary)
+				|| type == typeof(Stream)
+				|| type == typeof(XmlReader)
+				|| type.GetCustomAttributes(typeof(ScalarAttribute),true).Any() // If the type is a UDT pass it as is
+#if !SILVERLIGHT
+				|| type == typeof(XmlDocument)
+				|| type == typeof(XElement)
+#endif
+				;
+		}
+		///<summary>
+		/// Returns an array of Type objects that represent the type arguments
+		/// of a generic type or the type parameters of a generic type definition.
+		///</summary>
+		/// <param name="type">A <see cref="System.Type"/> instance.</param>
+		///<param name="baseType">Non generic base type.</param>
+		///<returns>An array of Type objects that represent the type arguments
+		/// of a generic type. Returns an empty array if the current type is not a generic type.</returns>
+		public static Type[] GetGenericArguments(Type type, Type baseType)
+		{
+			var baseTypeName = baseType.Name;
+			for (var t = type; t != typeof(object) && t != null; t = t.BaseType)
+			{
+				if (t.IsGenericType)
+				{
+					if (baseType.IsGenericTypeDefinition)
+					{
+						if (t.GetGenericTypeDefinition() == baseType)
+							return t.GetGenericArguments();
+					}
+					else if (baseTypeName == null || t.Name.Split('`')[0] == baseTypeName)
+					{
+						return t.GetGenericArguments();
+					}
+				}
+			}
+			foreach (var t in type.GetInterfaces())
+			{
+				if (t.IsGenericType)
+				{
+					if (baseType.IsGenericTypeDefinition)
+					{
+						if (t.GetGenericTypeDefinition() == baseType)
+							return t.GetGenericArguments();
+					}
+					else if (baseTypeName == null || t.Name.Split('`')[0] == baseTypeName)
+					{
+						return t.GetGenericArguments();
+					}
+				}
+			}
+			return null;
+		}
+		/// <summary>
+		/// Substitutes the elements of an array of types for the type parameters
+		/// of the current generic type definition and returns a Type object
+		/// representing the resulting constructed type.
+		/// </summary>
+		/// <param name="type">A <see cref="System.Type"/> instance.</param>
+		/// <param name="typeArguments">An array of types to be substituted for
+		/// the type parameters of the current generic type.</param>
+		/// <returns>A Type representing the constructed type formed by substituting
+		/// the elements of <paramref name="typeArguments"/> for the type parameters
+		/// of the current generic type.</returns>
+		/// <seealso cref="System.Type.MakeGenericType"/>
+		public static Type TranslateGenericParameters(Type type, Type[] typeArguments)
+		{
+			// 'T paramName' case
+			//
+			if (type.IsGenericParameter)
+				return typeArguments[type.GenericParameterPosition];
+			// 'List<T> paramName' or something like that.
+			//
+			if (type.IsGenericType && type.ContainsGenericParameters)
+			{
+				var genArgs = type.GetGenericArguments();
+				for (var i = 0; i < genArgs.Length; ++i)
+					genArgs[i] = TranslateGenericParameters(genArgs[i], typeArguments);
+				return type.GetGenericTypeDefinition().MakeGenericType(genArgs);
+			}
+			// Non-generic type.
+			//
+			return type;
+		}
+		public static bool CompareParameterTypes(Type goal, Type probe)
+		{
+			if (goal == probe)
+				return true;
+			if (goal.IsGenericParameter)
+				return CheckConstraints(goal, probe);
+			if (goal.IsGenericType && probe.IsGenericType)
+				return CompareGenericTypes(goal, probe);
+			return false;
+		}
+		public static bool CheckConstraints(Type goal, Type probe)
+		{
+			var constraints = goal.GetGenericParameterConstraints();
+			for (var i = 0; i < constraints.Length; i++)
+				if (!constraints[i].IsAssignableFrom(probe))
+					return false;
+			return true;
+		}
+		public static bool CompareGenericTypes(Type goal, Type probe)
+		{
+			var  genArgs =  goal.GetGenericArguments();
+			var specArgs = probe.GetGenericArguments();
+			var match    = (genArgs.Length == specArgs.Length);
+			for (var i = 0; match && i < genArgs.Length; i++)
+			{
+				if (genArgs[i] == specArgs[i])
+					continue;
+				if (genArgs[i].IsGenericParameter)
+					match = CheckConstraints(genArgs[i], specArgs[i]);
+				else if (genArgs[i].IsGenericType && specArgs[i].IsGenericType)
+					match = CompareGenericTypes(genArgs[i], specArgs[i]);
+				else
+					match = false;
+			}
+			return match;
+		}
+		public static PropertyInfo GetPropertyByMethod(MethodInfo method)
+		{
+			if (method != null)
+			{
+				var type = method.DeclaringType;
+				var attr = BindingFlags.NonPublic | BindingFlags.Public | (method.IsStatic ? BindingFlags.Static : BindingFlags.Instance);
+				foreach (var info in type.GetProperties(attr))
+				{
+					if (info.CanRead && method == info.GetGetMethod(true))
+						return info;
+					if (info.CanWrite && method == info.GetSetMethod(true))
+						return info;
+				}
+			}
+			return null;
+		}
+		public static Type GetMemberType(MemberInfo memberInfo)
+		{
+			switch (memberInfo.MemberType)
+			{
+				case MemberTypes.Property    : return ((PropertyInfo)   memberInfo).PropertyType;
+				case MemberTypes.Field       : return ((FieldInfo)      memberInfo).FieldType;
+				case MemberTypes.Method      : return ((MethodInfo)     memberInfo).ReturnType;
+				case MemberTypes.Constructor : return ((ConstructorInfo)memberInfo).DeclaringType;
+			}
+			throw new InvalidOperationException();
+		}
+		public static bool IsFloatType(Type type)
+		{
+			if (IsNullableType(type))
+				type = type.GetGenericArguments()[0];
+			switch (Type.GetTypeCode(type))
+			{
+				case TypeCode.Single  :
+				case TypeCode.Double  :
+				case TypeCode.Decimal : return true;
+			}
+			return false;
+		}
+		public static bool IsIntegerType(Type type)
+		{
+			if (IsNullableType(type))
+				type = type.GetGenericArguments()[0];
+			switch (Type.GetTypeCode(type))
+			{
+				case TypeCode.SByte  :
+				case TypeCode.Byte   :
+				case TypeCode.Int16  :
+				case TypeCode.UInt16 :
+				case TypeCode.Int32  :
+				case TypeCode.UInt32 :
+				case TypeCode.Int64  :
+				case TypeCode.UInt64 : return true;
+			}
+			return false;
+		}
+		public static bool IsNullableValueMember(MemberInfo member)
+		{
+			return
+				member.Name == "Value" &&
+				member.DeclaringType.IsGenericType &&
+				member.DeclaringType.GetGenericTypeDefinition() == typeof(Nullable<>);
+		}
+		public static bool IsNullableHasValueMember(MemberInfo member)
+		{
+			return
+				member.Name == "HasValue" &&
+				member.DeclaringType.IsGenericType &&
+				member.DeclaringType.GetGenericTypeDefinition() == typeof(Nullable<>);
+		}
+		public static bool Equals(MemberInfo member1, MemberInfo member2)
+		{
+			return Equals(member1, member2, null);
+		}
+		public static bool Equals(MemberInfo member1, MemberInfo member2, Type declaringType)
+		{
+			if (ReferenceEquals(member1, member2))
+				return true;
+			if (member1 == null || member2 == null)
+				return false;
+			if (member1.Name == member2.Name)
+			{
+				if (member1.DeclaringType == member2.DeclaringType)
+					return true;
+				if (member1 is PropertyInfo)
+				{
+					var isSubclass =
+						IsSameOrParent(member1.DeclaringType, member2.DeclaringType) ||
+						IsSameOrParent(member2.DeclaringType, member1.DeclaringType);
+					if (isSubclass)
+						return true;
+					if (declaringType != null && member2.DeclaringType.IsInterface)
+					{
+						var getter1 = ((PropertyInfo)member1).GetGetMethod();
+						var getter2 = ((PropertyInfo)member2).GetGetMethod();
+						var map = declaringType.GetInterfaceMap(member2.DeclaringType);
+						for (var i = 0; i < map.InterfaceMethods.Length; i++)
+							if (getter2.Name == map.InterfaceMethods[i].Name && getter2.DeclaringType == map.InterfaceMethods[i].DeclaringType &&
+								getter1.Name == map.TargetMethods   [i].Name && getter1.DeclaringType == map.TargetMethods   [i].DeclaringType)
+								return true;
+					}
+				}
+			}
+			if (member2.DeclaringType.IsInterface && member1.Name.EndsWith(member2.Name))
+			{
+				if (member1 is PropertyInfo)
+				{
+					var isSubclass = member2.DeclaringType.IsAssignableFrom(member1.DeclaringType);
+					if (isSubclass)
+					{
+						var getter1 = ((PropertyInfo)member1).GetGetMethod();
+						var getter2 = ((PropertyInfo)member2).GetGetMethod();
+						var map = member1.DeclaringType.GetInterfaceMap(member2.DeclaringType);
+						for (var i = 0; i < map.InterfaceMethods.Length; i++)
+							if ((getter2 == null || (getter2.Name == map.InterfaceMethods[i].Name && getter2.DeclaringType == map.InterfaceMethods[i].DeclaringType))
+								&&
+								(getter1 == null || (getter1.Name == map.InterfaceMethods[i].Name && getter1.DeclaringType == map.InterfaceMethods[i].DeclaringType))
+								)
+							{
+								return true;
+							}
+					}
+				}
+			}
+			return false;
+		}
+		interface IGetDefaultValueHelper
+		{
+			object GetDefaultValue();
+		}
+		class GetDefaultValueHelper<T> : IGetDefaultValueHelper
+		{
+			public object GetDefaultValue()
+			{
+				return default(T);
+			}
+		}
+		public static object GetDefaultValue(Type type)
+		{
+			var dtype  = typeof(GetDefaultValueHelper<>).MakeGenericType(type);
+			var helper = (IGetDefaultValueHelper)Activator.CreateInstance(dtype);
+			return helper.GetDefaultValue();
+		}
+		#endregion
+	}
+}

Mercurial > pub > bltoolkit

comparison Source/Reflection/TypeHelper.cs @ 0:f990fcb411a9