private object RowDeserializer(ICqlRow row, ObjectSerializerConventions conventions)
{
if (Type.GetTypeCode(_type) != TypeCode.Object)
return FrameworkTypeRowDeserializer(row, conventions);
if (_type.Name.Contains("AnonymousType"))
return AnonymousRowDeserializer(row, conventions);
var obj = Activator.CreateInstance(_type);
foreach (var prop in _type.GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
var name = prop.Name;
if (conventions.KeyPropertyNames.Contains(name, conventions.AreKeyPropertyNamesCaseSensitive ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal))
{
prop.SetValue(obj, Convert.ChangeType(row.Key, prop.PropertyType), null);
continue;
}
if (row.Columns.Any(x => x.ColumnName == name))
prop.SetValue(obj, Convert.ChangeType(row[name], prop.PropertyType), null);
}
return obj;
}
public object Deserialize(ICqlRow row, ObjectSerializerConventions conventions = null)
{
conventions = conventions ?? new ObjectSerializerConventions();
var func = GenerateRowDeserializer();
return func(row, conventions);
}
private object FrameworkTypeRowDeserializer(ICqlRow row, ObjectSerializerConventions conventions)
{
if (row.Columns.Count > 0)
return Convert.ChangeType(row.Columns[0].ColumnValue, _type);
return Convert.ChangeType(row.Key, _type);
}
internal CqlQueryEvaluator(ObjectSerializerConventions conventions = null)
{
SelectFieldsArray = new List<string>();
OrderByFieldsArray = new List<string>();
_conventions = conventions;
}
public IEnumerable<object> Deserialize(IEnumerable<ICqlRow> rows, ObjectSerializerConventions conventions = null)
{
conventions = conventions ?? new ObjectSerializerConventions();
var func = GenerateRowDeserializer();
foreach (var row in rows)
yield return func(row, conventions);
}
private object AnonymousRowDeserializer(ICqlRow row, ObjectSerializerConventions conventions)
{
var props = _type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
var args = new List<object>();
foreach (var prop in props)
{
var name = prop.Name;
if (row.Columns.Any(x => x.ColumnName == name))
args.Add(Convert.ChangeType(row[name], prop.PropertyType));
}
return Activator.CreateInstance(_type, args.ToArray());
}
private object AnonymousRowDeserializer(ICqlRow row, ObjectSerializerConventions conventions)
{
var props = _type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
var args = new List<object>();
foreach (var prop in props)
{
var name = prop.Name;
if (conventions.KeyPropertyNames.Contains(name, conventions.AreKeyPropertyNamesCaseSensitive ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal))
{
args.Add(Convert.ChangeType(row.Key, prop.PropertyType));
continue;
}
if (row.Columns.Any(x => x.ColumnName == name))
args.Add(Convert.ChangeType(row[name], prop.PropertyType));
}
return Activator.CreateInstance(_type, args.ToArray());
}
public static string GetCql(Expression expression, ObjectSerializerConventions conventions = null)
{
var eval = new CqlQueryEvaluator(conventions);
eval.Evaluate(expression);
return eval.Query;
}
