protected override Record GetValue(DataStructure schema, FieldTypeFactory fieldTypeFactory, long currentPosition, byte[] bytes)
{
Record record = new Record()
{
Fields = new RecordField[schema.Fields.Count], Location = currentPosition
};
MemoryStream stream = new MemoryStream(bytes);
for (int i = 0; i < schema.Fields.Count; i++)
{
var field = schema.Fields[i];
IDataFieldType fieldType = fieldTypeFactory.GetFieldType(field.DataType);
object fieldValue = fieldType.ReadFromStream(stream);
record.Fields[i] = new RecordField()
{
DataType = field.DataType, Value = fieldValue
};
}
return(record);
}
/// <summary>
/// Inserts the record returns the location at which it was inserted.
/// </summary>
/// <param name="fields"></param>
/// <returns></returns>
public long Insert(params object[] fields)
{
_stream.SeekToRecord(_schema, BlockHeader.BlockSequence, BlockHeader.RecordCount);
IDataFieldType[] fieldTypes = new IDataFieldType[fields.Length];
for (int i = 0; i < fields.Length; i++)
{
var fieldDefinition = _schema.Fields[i];
fieldTypes[i] = _fieldTypeFactory.GetFieldType(fieldDefinition.DataType);
}
for (int i = 0; i < fields.Length; i++)
{
var field = fields[i];
if (!fieldTypes[i].IsValid(field))
{
//Maybe i should collect all the failures and return them at once.
throw new Exception();
}
}
long recordLocation = _stream.Position;
//Only if there are no failures, we start writing to the file
for (int i = 0; i < fields.Length; i++)
{
var field = fields[i];
fieldTypes[i].WriteToStream(_stream, field);
}
BlockHeader.FreeBytes -= _schema.GetRecordSize();
BlockHeader.RecordCount++;
_stream.Flush();
this.WriteBlockHeader();
return(recordLocation);
}
