public TypeConstructor()
{
var interfaceType = typeof(IMetrics);
var typeBuilder = ModuleBuilder.DefineType("GenericMetrics", TypeAttributes.Public | TypeAttributes.Sealed);
typeBuilder.AddInterfaceImplementation(interfaceType);
this.Properties = this.HandleProperties(typeBuilder, interfaceType);
try
{
this.Type = typeBuilder.CreateTypeInfo().AsType();
}
catch (TypeLoadException e)
{
throw new Exception($"Unable to create implementation for interface {interfaceType.FullName}", e);
}
}
private PropertyGrouping HandleProperties(TypeBuilder typeBuilder, Type interfaceType)
{
var grouping = new PropertyGrouping(InterfaceAndChildren(interfaceType, x => x.GetTypeInfo().GetProperties()));
MethodAttributes attributes = MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig | MethodAttributes.SpecialName;
foreach (var property in grouping.Metric)
{
var propertyBuilder = typeBuilder.DefineProperty(property.PropertyInfo.Name, PropertyAttributes.None, property.PropertyInfo.PropertyType, null);
var getter = typeBuilder.DefineMethod(property.PropertyInfo.GetMethod.Name, attributes, property.PropertyInfo.PropertyType, new Type[0]);
var backingField = typeBuilder.DefineField("bk_" + property.PropertyInfo.Name, property.PropertyInfo.PropertyType, FieldAttributes.Private);
var getterIlGenerator = getter.GetILGenerator();
getterIlGenerator.Emit(OpCodes.Ldarg_0);
getterIlGenerator.Emit(OpCodes.Ldfld, backingField);
getterIlGenerator.Emit(OpCodes.Ret);
propertyBuilder.SetGetMethod(getter);
property.BackingField = backingField;
}
return(grouping);
}