protected void MapProperty <TProperty>(int columnIndex,
Expression <Func <TEntity, TProperty> > mappingExpression)
{
var propertyName = GetPropertyNameFromExpression(mappingExpression);
var mapper = PropertyMapperFactory.CreateMapper <TEntity>(propertyName);
var mapping = new CsvPropertyMapping(columnIndex, mapper);
_mappings.Insert(columnIndex, mapping);
_numCols++;
}
public static IUtf8PropertyMapper <TEntity> CreateMapperUtf8 <TEntity>(string propertyName)
{
var factory = new PropertyMapperFactory();
var propertyInfo = typeof(TEntity).GetProperty(propertyName, BindingFlags.Public | BindingFlags.Instance);
var assemblyBuilder = factory.GetAssemblyBuilder("Mappers");
var moduleBuilder = factory.GetModuleBuilder(assemblyBuilder);
var typeBuilder = factory.GetType(moduleBuilder, typeof(TEntity).Name, typeof(IUtf8PropertyMapper <>).MakeGenericType(typeof(TEntity)));
var method = factory.GetMethod(typeBuilder, "Map", typeof(TEntity), typeof(ReadOnlySpan <>).MakeGenericType(typeof(byte)));
var ilGen = method.GetILGenerator();
factory.GenerateParseCallUtf8(ilGen, propertyInfo.PropertyType);
factory.GenerateSetProperty(ilGen, propertyInfo);
ilGen.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(method, typeof(IUtf8PropertyMapper <>).MakeGenericType(typeof(TEntity)).GetMethod("Map"));
var type = typeBuilder.CreateType();
var constructor = type.GetConstructor(Type.EmptyTypes);
var casted = (IUtf8PropertyMapper <TEntity>)constructor.Invoke(null);
return(casted);
}
