private static PropertyMapper GenerateIndexerDelegate(Type indexerType, Type targetType, bool ignoreMappings)
{
var method = new DynamicMethod("Map_" + indexerType.FullName + "_" + targetType.FullName, null, new[] { typeof(object), typeof(object) }, typeof(Mapper).Module);
var il = method.GetILGenerator();
var targetProperties = Reflector.GetPropertyMap(targetType);
var entityMap = MappingFactory.GetEntityMap(targetType);
var getItem = indexerType.GetMethod("get_Item", new[] { typeof(string) });
var matches = targetProperties.Where(t => t.Value.IsSelectable && t.Key.PropertyType.IsPublic && t.Key.CanWrite && (t.Value.IsSimpleList || t.Value.IsSimpleType || t.Value.IsBinary));
foreach (var match in matches)
{
var typeConverter = MappingFactory.GetTypeConverter(getItem.ReturnType, match.Key, entityMap);
if (match.Value.IsSimpleList && typeConverter == null)
{
continue;
}
il.Emit(OpCodes.Ldarg_1);
if (typeConverter.Item1 != null)
{
// New the converter
il.Emit(OpCodes.Newobj, typeConverter.Item1.GetConstructor(Type.EmptyTypes));
}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldstr, MappingFactory.GetPropertyOrColumnName(match.Key, ignoreMappings, entityMap, true));
il.Emit(OpCodes.Callvirt, getItem);
if (typeConverter.Item1 == null)
{
il.EmitCastToReference(match.Key.PropertyType);
}
else
{
// Call the convert method
il.Emit(OpCodes.Callvirt, typeConverter.Item2.GetMethod("ConvertForward"));
}
il.EmitCall(OpCodes.Callvirt, match.Key.GetSetMethod(), null);
}
il.Emit(OpCodes.Ret);
var mapper = (PropertyMapper)method.CreateDelegate(typeof(PropertyMapper));
return(mapper);
}
private static void DefineIndexerProperty(PropertyInfo property, TypeBuilder typeBuilder, FieldInfo field, Type objectType, bool ignoreMappings, IEntityMap entityMap)
{
// create the new property.
var propertyBuilder = typeBuilder.DefineProperty(property.Name, PropertyAttributes.HasDefault, property.PropertyType, null);
// The property "set" and property "get" methods require a special set of attributes.
//var getSetAttr = MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig | MethodAttributes.Virtual;
const MethodAttributes getSetAttr = MethodAttributes.Private | MethodAttributes.HideBySig | MethodAttributes.NewSlot | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.SpecialName;
var columnName = MappingFactory.GetPropertyOrColumnName(property, ignoreMappings, entityMap, true);
// create the getter if we can read.
if (property.CanRead)
{
var getItemMethod = objectType.GetMethod("get_Item", new[] { typeof(string) });
var typeConverter = MappingFactory.GetTypeConverter(getItemMethod.ReturnType, property, entityMap);
// create the get method for the property.
var getMethodName = "get_" + property.Name;
var getMethod = typeBuilder.DefineMethod(getMethodName, getSetAttr, property.PropertyType, Type.EmptyTypes);
// get the IL generator to generate the required IL.
ILGenerator il = getMethod.GetILGenerator();
if (typeConverter.Item1 != null)
{
// New the converter
il.Emit(OpCodes.Newobj, typeConverter.Item1.GetConstructor(Type.EmptyTypes));
}
// load the first argument (the instance itself) and the field.
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, field);
il.Emit(OpCodes.Ldstr, columnName);
il.Emit(OpCodes.Callvirt, getItemMethod);
if (typeConverter.Item1 == null)
{
il.EmitCastToReference(property.PropertyType);
}
else
{
// Call the convert method
il.Emit(OpCodes.Callvirt, typeConverter.Item2.GetMethod("ConvertForward"));
}
il.Emit(OpCodes.Ret);
// set the method.
propertyBuilder.SetGetMethod(getMethod);
typeBuilder.DefineMethodOverride(getMethod, property.ReflectedType.GetMethod(getMethodName));
}
// create the setter if we can read.
if (property.CanWrite)
{
var setItemMethod = objectType.GetMethod("set_Item", new[] { typeof(string), typeof(object) });
var typeConverter = MappingFactory.GetTypeConverter(setItemMethod.GetParameters()[1].ParameterType, property, entityMap);
// create the set method of the property.
var setMethodName = "set_" + property.Name;
var setMethod = typeBuilder.DefineMethod(setMethodName, getSetAttr, null, new[] { property.PropertyType });
// get the IL generator to generate some IL.
ILGenerator il = setMethod.GetILGenerator();
// load the first argument (instance itself) and the field.
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, field);
il.Emit(OpCodes.Ldstr, columnName);
if (typeConverter.Item1 != null)
{
// New the converter
il.Emit(OpCodes.Newobj, typeConverter.Item1.GetConstructor(Type.EmptyTypes));
}
// load the second argument (holding the value).
il.Emit(OpCodes.Ldarg_1);
if (typeConverter.Item1 != null)
{ // Call the convert method
il.Emit(OpCodes.Callvirt, typeConverter.Item2.GetMethod("ConvertBackward"));
}
else
{
il.BoxIfNeeded(property.PropertyType);
}
// directly call the inner object's get method of the property.
il.Emit(OpCodes.Callvirt, setItemMethod);
il.Emit(OpCodes.Ret);
propertyBuilder.SetSetMethod(setMethod);
typeBuilder.DefineMethodOverride(setMethod, property.ReflectedType.GetMethod(setMethodName));
}
}
private static PropertyMapper GenerateIndexerDelegate(Type indexerType, Type targetType, bool autoTypeCoercion)
{
var method = new DynamicMethod("Map_" + indexerType.FullName + "_" + targetType.FullName, null, new[] { typeof(object), typeof(object) }, typeof(Mapper).Module);
var il = method.GetILGenerator();
var targetProperties = Reflector.GetPropertyMap(targetType);
var entityMap = MappingFactory.GetEntityMap(targetType);
var getTypeFromHandle = typeof(Type).GetMethod("GetTypeFromHandle");
var getDefaultValue = typeof(System.Activator).GetMethods().FirstOrDefault(m => m.Name == "CreateInstance" && m.GetParameters().Length == 1 && m.GetParameters()[0].ParameterType == typeof(Type));
var useIndexerMethod = true;
if (!GetItemMethods.TryGetValue(indexerType, out var getItem) || getItem == null)
{
getItem = indexerType.GetMethod("get_Item", new[] { typeof(string) });
useIndexerMethod = false;
}
var matches = targetProperties.Where(t => t.Value.IsSelectable && t.Key.PropertyType.IsPublic && t.Key.CanWrite && (t.Value.IsSimpleList || t.Value.IsSimpleType || t.Value.IsBinary));
foreach (var match in matches)
{
var typeConverter = MappingFactory.GetTypeConverter(getItem.ReturnType, match.Key, entityMap);
if (match.Value.IsSimpleList && typeConverter == null)
{
continue;
}
typeConverter = MatchTypeConverter(targetType, match.Value, getItem.ReturnType, typeConverter, autoTypeCoercion);
il.Emit(OpCodes.Ldarg_1);
if (typeConverter.Item1 != null)
{
// New the converter
il.Emit(OpCodes.Newobj, typeConverter.Item1.GetConstructor(Type.EmptyTypes));
}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldstr, MappingFactory.GetPropertyOrColumnName(match.Key, false, entityMap, true));
if (!useIndexerMethod)
{
il.Emit(OpCodes.Callvirt, getItem);
}
else
{
var propertyType = match.Value.PropertyType;
if (propertyType.IsValueType)
{
var ctor = propertyType.GetConstructor(Type.EmptyTypes);
if (ctor != null)
{
il.Emit(OpCodes.Newobj, ctor);
il.BoxIfNeeded(propertyType);
}
else if (propertyType.IsPrimitive)
{
if (propertyType == typeof(double))
{
il.Emit(OpCodes.Ldc_R8, 0.0);
}
else if (propertyType == typeof(float))
{
il.Emit(OpCodes.Ldc_R4, 0.0f);
}
else
{
il.EmitFastInt(0);
if (propertyType == typeof(long) || propertyType == typeof(ulong))
{
il.Emit(OpCodes.Conv_I8);
}
}
il.BoxIfNeeded(propertyType);
}
else
{
il.Emit(OpCodes.Ldtoken, propertyType);
il.Emit(OpCodes.Call, getTypeFromHandle);
il.Emit(OpCodes.Call, getDefaultValue);
}
}
else
{
il.Emit(OpCodes.Ldnull);
}
il.Emit(OpCodes.Call, getItem);
}
if (typeConverter.Item1 == null)
{
il.EmitCastToReference(match.Key.PropertyType);
}
else
{
// Call the convert method
il.Emit(OpCodes.Callvirt, typeConverter.Item2.GetMethod("ConvertForward"));
}
il.EmitCall(OpCodes.Callvirt, match.Key.GetSetMethod(), null);
}
il.Emit(OpCodes.Ret);
var mapper = (PropertyMapper)method.CreateDelegate(typeof(PropertyMapper));
return(mapper);
}
