Merge branch 'Reflection' of Common/Utils into dev

ICD.Common.Utils.Tests/Extensions/TypeExtensionsTest.cs

@@ -10,6 +10,14 @@ namespace ICD.Common.Utils.Tests.Extensions
 	[TestFixture]
 	public sealed class TypeExtensionsTest
 	{
+		[TestCase(typeof(byte), false)]
+		[TestCase(typeof(byte?), true)]
+		[TestCase(typeof(string), true)]
+		public void CanBeNullTest(Type value, bool expected)
+		{
+			Assert.AreEqual(expected, value.CanBeNull());
+		}
+
 		[TestCase(typeof(byte), true)]
 		[TestCase(typeof(decimal), true)]
 		[TestCase(typeof(double), true)]
@@ -61,6 +69,23 @@ namespace ICD.Common.Utils.Tests.Extensions
 			Assert.AreEqual(expected, value.IsDecimalNumeric());
 		}
 
+		[TestCase(typeof(byte), true)]
+		[TestCase(typeof(decimal), false)]
+		[TestCase(typeof(double), false)]
+		[TestCase(typeof(float), false)]
+		[TestCase(typeof(int), true)]
+		[TestCase(typeof(long), true)]
+		[TestCase(typeof(sbyte), true)]
+		[TestCase(typeof(short), true)]
+		[TestCase(typeof(uint), true)]
+		[TestCase(typeof(ulong), true)]
+		[TestCase(typeof(ushort), true)]
+		[TestCase(typeof(string), false)]
+		public void IsIntegerNumericTest(Type value, bool expected)
+		{
+			Assert.AreEqual(expected, value.IsIntegerNumeric());
+		}
+
 		[TestCase(typeof(string), typeof(object), true)]
 		[TestCase(typeof(object), typeof(string), false)]
 		public void IsAssignableToTest(Type a, Type b, bool expected)

ICD.Common.Utils.Tests/ReflectionUtilsTest.cs

@@ -121,9 +121,33 @@ namespace ICD.Common.Utils.Tests
 		}
 
 		[Test]
-		public void LoadAssemblyFromPath()
+		public void LoadAssemblyFromPathTest()
 		{
 			Assert.Inconclusive();
 		}
+
+		[Test]
+		public void GetImplementationTest()
+		{
+			Assert.Inconclusive();
+		}
+
+		[Test]
+		public void ChangeTypeTest()
+		{
+			// Same type
+			Assert.AreEqual(10, ReflectionUtils.ChangeType(10, typeof(int)));
+
+			// Null
+			Assert.AreEqual(null, ReflectionUtils.ChangeType(null, typeof(string)));
+
+			// Enums
+			Assert.AreEqual(BindingFlags.GetProperty, ReflectionUtils.ChangeType((int)(object)BindingFlags.GetProperty, typeof(BindingFlags)));
+			Assert.AreEqual(BindingFlags.GetProperty, ReflectionUtils.ChangeType(BindingFlags.GetProperty.ToString(), typeof(BindingFlags)));
+			Assert.AreEqual(BindingFlags.GetProperty, ReflectionUtils.ChangeType(((int)(object)BindingFlags.GetProperty).ToString(), typeof(BindingFlags)));
+
+			// Everything else
+			Assert.AreEqual(10, ReflectionUtils.ChangeType("10", typeof(int)));
+		}
 	}
 }

ICD.Common.Utils/Extensions/TypeExtensions.cs

@@ -45,6 +45,18 @@ namespace ICD.Common.Utils.Extensions
 			typeof(float),
 		};
 
+		private static readonly IcdHashSet<Type> s_IntegerNumericTypes = new IcdHashSet<Type>
+		{
+			typeof(byte),
+			typeof(int),
+			typeof(long),
+			typeof(sbyte),
+			typeof(short),
+			typeof(uint),
+			typeof(ulong),
+			typeof(ushort)
+		};
+
 		private static readonly Dictionary<Type, Type[]> s_TypeAllTypes;
 		private static readonly Dictionary<Type, Type[]> s_TypeBaseTypes;
 		private static readonly Dictionary<Type, Type[]> s_TypeImmediateInterfaces;
@@ -61,6 +73,19 @@ namespace ICD.Common.Utils.Extensions
 			s_TypeMinimalInterfaces = new Dictionary<Type, Type[]>();
 		}
 
+		/// <summary>
+		/// Returns true if the given type can represent a null value.
+		/// </summary>
+		/// <param name="extends"></param>
+		/// <returns></returns>
+		public static bool CanBeNull(this Type extends)
+		{
+			if (extends == null)
+				throw new ArgumentException("extends");
+
+			return !extends.IsValueType || Nullable.GetUnderlyingType(extends) != null;
+		}
+
 		/// <summary>
 		/// Returns true if the given type is a numeric type.
 		/// </summary>
@@ -100,6 +125,24 @@ namespace ICD.Common.Utils.Extensions
 			return s_DecimalNumericTypes.Contains(extends);
 		}
 
+		/// <summary>
+		/// Returns true if the given type is an integer numeric type.
+		/// </summary>
+		/// <param name="extends"></param>
+		/// <returns></returns>
+		public static bool IsIntegerNumeric(this Type extends)
+		{
+			if (extends == null)
+				throw new ArgumentException("extends");
+
+			return s_IntegerNumericTypes.Contains(extends);
+		}
+
+		/// <summary>
+		/// Gets the Assembly containing the type.
+		/// </summary>
+		/// <param name="extends"></param>
+		/// <returns></returns>
 		public static Assembly GetAssembly(this Type extends)
 		{
 			if (extends == null)
@@ -114,6 +157,12 @@ namespace ICD.Common.Utils.Extensions
 				.Assembly;
 		}
 
+		/// <summary>
+		/// Returns true if the type is assignable to the given type.
+		/// </summary>
+		/// <param name="from"></param>
+		/// <param name="to"></param>
+		/// <returns></returns>
 		public static bool IsAssignableTo(this Type from, Type to)
 		{
 			if (from == null)

ICD.Common.Utils/ReflectionUtils.cs

@@ -368,5 +368,42 @@ namespace ICD.Common.Utils
 				? property
 				: GetImplementation(property.DeclaringType, property);
 		}
+
+		/// <summary>
+		/// Changes the given value to the given type.
+		/// </summary>
+		/// <param name="value"></param>
+		/// <param name="type"></param>
+		/// <returns></returns>
+		public static object ChangeType(object value, Type type)
+		{
+			if (type == null)
+				throw new ArgumentNullException("type");
+
+			// Handle null value
+			if (value == null)
+			{
+				if (type.CanBeNull())
+					return null;
+
+				throw new InvalidCastException();
+			}
+
+			Type valueType = value.GetType();
+			if (valueType.IsAssignableTo(type))
+				return value;
+
+			// Handle enum
+			if (type.IsEnum)
+			{
+				if (valueType.IsIntegerNumeric())
+					return Enum.ToObject(type, value);
+
+				if (value is string)
+					return Enum.Parse(type, value as string, false);
+			}
+
+			return Convert.ChangeType(value, type, null);
+		}
 	}
 }