private void init()
{
var type = typeof(T);
var schema = this._reader.GetSchemaTable();
var columnOrds = schema.Rows
.Cast <DataRow>()
.Select(x => new
{
Name = x[0].ToString().Replace("[", "").Replace("]", "").Split('.')[1],
Ordianl = Convert.ToInt32(x[1])
});
var props = type.GetProperties()
.Where(x => System.Attribute.IsDefined(x, typeof(MapToAttribute)))
.Select(x => new
{
Attribute = x.GetCustomAttribute <MapToAttribute>(),
PropertyInfo = x
})
.Join(columnOrds, p => p.Attribute.MdxColumn, co => co.Name, (p, co) => new
{
Ordinal = co.Ordianl,
Property = p
})
.OrderBy(x => x.Property.Attribute.MdxColumn);
this._ornials = props.Select(x => x.Ordinal).ToArray();
var bindingList = new Dictionary <ParameterExpression, MemberAssignment>();
this._converters = new TypeConverter[props.Count()];
var stringArrayParam = Expression.Parameter(typeof(string[]), "values");
var converterArrayParam = Expression.Parameter(typeof(TypeConverter[]), "converters");
var converter = typeof(TypeConverter).GetMethod("ConvertFromString", new[] { typeof(string) });
props.For((v, i) =>
{
var prop = v.Property.PropertyInfo;
var paramExp = Expression.Parameter(prop.PropertyType, prop.Name);
var arrayAssignment = Expression.ArrayIndex(stringArrayParam, Expression.Constant(i));
var typeConverter = TypeDescriptor.GetConverter(prop.PropertyType);
var converterArrayAssignment = Expression.ArrayIndex(converterArrayParam, Expression.Constant(i));
var defaultValue = prop.PropertyType.GetDefault();
var defaultConstant = Expression.Constant(defaultValue == null ? null : defaultValue.ToString(), typeof(string));
var methodExp = Expression.Call(converterArrayAssignment, converter, Expression.Coalesce(arrayAssignment, defaultConstant));
Expression.Bind(prop,
Expression.Convert(methodExp, prop.PropertyType))
.Finally(bind => bindingList.Add(paramExp, bind));
this._converters[i] = typeConverter;
});
var newExp = Expression.New(typeof(T));
var memberInit = Expression.MemberInit(newExp, bindingList.Values.ToArray());
var lambda = Expression.Lambda <Creatorlator>(memberInit, new[] { converterArrayParam, stringArrayParam });
this._creator = lambda.Compile();
}
void init()
{
var type = typeof(T);
var schema = _reader.GetSchemaTable();
if (schema != null)
{
var columnOrds = schema.Rows
.Cast <DataRow>()
.Select(x => new
{
Name = x[0].ToString().Replace("[", "").Replace("]", ""),
Ordianl = Convert.ToInt32(x[1])
});
var props = type.GetProperties()
.Select(x => new
{
PropertyInfo = x
}).Join(columnOrds, a => a.PropertyInfo.Name, b => b.Name, (a, b) => new
{
Ordinal = b.Ordianl,
Property = a
}).OrderBy(x => x.Ordinal);
_ornials = props.Select(x => x.Ordinal).ToArray();
var bindingList = new Dictionary <ParameterExpression, MemberAssignment>();
_converters = new TypeConverter[props.Count()];
var stringArrayParam = Expression.Parameter(typeof(string[]), "values");
var converterArrayParam = Expression.Parameter(typeof(TypeConverter[]), "converters");
var converter = typeof(TypeConverter).GetMethod("ConvertFromString", new[] { typeof(string) });
props.For((v, i) =>
{
var prop = v.Property.PropertyInfo;
var paramExp = Expression.Parameter(prop.PropertyType, prop.Name);
var arrayAssignment = Expression.ArrayIndex(stringArrayParam, Expression.Constant(i));
var typeConverter = TypeDescriptor.GetConverter(prop.PropertyType);
var converterArrayAssignment = Expression.ArrayIndex(converterArrayParam, Expression.Constant(i));
var defaultValue = prop.PropertyType.GetDefault();
var defaultConstant = Expression.Constant(defaultValue == null ? null : defaultValue.ToString(), typeof(string));
var methodExp = Expression.Call(converterArrayAssignment, converter, Expression.Coalesce(arrayAssignment, defaultConstant));
Expression.Bind(prop,
Expression.Convert(methodExp, prop.PropertyType))
.Finally(bind => bindingList.Add(paramExp, bind));
_converters[i] = typeConverter;
});
var newExp = Expression.New(typeof(T));
var memberInit = Expression.MemberInit(newExp, bindingList.Values.ToArray());
var lambda = Expression.Lambda <Creatorlator>(memberInit, new[] { converterArrayParam, stringArrayParam });
_creator = lambda.Compile();
}
}
