private static string ConvertCollection(Type ctype, IEnumerable data)
{
var json = new StringBuilder("[", JsonConverter.StringBuilderCapacity); // collection type
var type = Common.TryGetSerializationItemType(ctype, data, Text.Method.ToJson); // item type
CollectionType collectionType;
ClrMappingInfo clrInfo = null;
Type clrType;
QueryTalkException exception;
List <JsonProperty> jsonProperties = null;
// empty collection
if (type == null)
{
collectionType = CollectionType.Object;
data = null;
}
else if (type == typeof(System.Object))
{
collectionType = CollectionType.Object;
}
else if (type == typeof(Value))
{
collectionType = CollectionType.Value;
}
// CLR compliant scalar type
else if (Mapping.CheckClrCompliance(type, out clrType, out exception) == Mapping.ClrTypeMatch.ClrMatch)
{
collectionType = CollectionType.Clr;
clrInfo = Mapping.ClrMapping[clrType];
}
// class
else
{
collectionType = CollectionType.Class;
jsonProperties = ReflectClass(type);
}
var first = true;
if (data != null)
{
foreach (var row in data)
{
if (!first)
{
json.Append(",");
}
if (row.IsUndefined())
{
json.Append(Text.ClrNull);
first = false;
continue;
}
switch (collectionType)
{
case CollectionType.Object:
var rowType = row.GetType();
if (Mapping.CheckClrCompliance(rowType, out clrType, out exception) != Mapping.ClrTypeMatch.ClrMatch)
{
throw exception;
}
clrInfo = Mapping.ClrMapping[rowType];
json.Append(clrInfo.ToJson(row));
break;
case CollectionType.Value:
var o = ((Value)row).Original;
clrInfo = Mapping.ClrMapping[o.GetType()];
json.Append(clrInfo.ToJson(o));
break;
case CollectionType.Clr:
json.Append(clrInfo.ToJson(row));
break;
// class
default:
json.Append(ConvertClass(row, jsonProperties));
break;
}
first = false;
}
}
json.Append("]");
return(json.ToString());
}
private static ColumnInfo[] ReflectReader(IDataRecord reader, out QueryTalkException exception)
{
exception = null;
var columns = new List <Loader.ColumnInfo>();
DataTable readerSchema = ((SqlDataReader)reader).GetSchemaTable();
int i = 0;
int index = 1;
List <string> columnNames = new List <string>();
foreach (var row in readerSchema.AsEnumerable())
{
Loader.ColumnInfo column = new ColumnInfo();
column.ColumnName = Naming.GetClrName((string)row[_columnNameText]);
if (String.IsNullOrEmpty(column.ColumnName))
{
column.ColumnName = GetColumnName(readerSchema, ref index);
}
column.ReaderOrdinal = (int)row[_columnOrdinalText];
column.ValueType = (Type)row[_dataTypeText];
Type clrType;
if (Mapping.CheckClrCompliance(column.ValueType, out clrType, out exception) != Mapping.ClrTypeMatch.ClrMatch)
{
exception = null;
continue;
}
if ((bool)row[_allowDBNullText] && !column.ValueType.IsClass)
{
column.IsNullable = true;
column.NullableType = Mapping.ClrMapping[column.ValueType].NullableType;
}
ClrMappingInfo mapping = Mapping.ClrMapping[column.ValueType];
column.ReaderGetMethod = typeof(SqlDataReader).GetMethod(mapping.SqlDataReaderGetMethodName,
new Type[] { typeof(int) });
column.IsUnbox = mapping.IsUnbox;
column.CtorParameterType = mapping.CtorParameterType;
// provide unique column name
int j = 1;
var renamed = column.ColumnName;
while (columnNames.Contains(renamed))
{
renamed = String.Format("{0}{1}{2}",
column.ColumnName,
Text.Free.Renamed,
j > 1 ? j.ToString() : String.Empty);
++j;
}
if (j > 1)
{
column.ColumnName = renamed;
}
columns.Add(column);
columnNames.Add(column.ColumnName);
++i;
}
return(columns.ToArray());
}
private static void _AppendValue(StringBuilder json, object value, ClrMappingInfo info, string propertyName, int indent)
{
json.AppendFormat("{0}:{1}{2}", propertyName.DelimitJsonString(), indent > 0 ? " " : "", info.ToJson(value));
}