public static T CreateInstance <T>(this IChoCSVLiteReader parser)
{
var rec = ChoActivator.CreateInstance <T>();
return(rec);
}
public static T Map <T>(this IChoCSVLiteReader parser, int lineNo, string[] cols, Action <int, string[], T> mapper,
bool hasHeader, ref bool skip, ref string[] headers, bool positionalMapping) where T : new()
{
skip = false;
if (mapper != null)
{
if (hasHeader)
{
if (lineNo == 0)
{
skip = true;
return(default(T));
}
}
var rec = parser.CreateInstance <T>();
mapper(lineNo, cols, rec);
return(rec);
}
else
{
if (hasHeader)
{
if (lineNo == 0)
{
headers = cols.Select((c, i) => c).ToArray();
skip = true;
return(default(T));
}
}
else
{
if (lineNo == 0)
{
headers = cols.Select((c, i) => $"Column{i}").ToArray();
}
}
var recType = typeof(T);
if (recType == typeof(ChoDynamicObject) || recType == typeof(ExpandoObject))
{
if (recType == typeof(ChoDynamicObject))
{
var rec = parser.CreateInstance <T>();
dynamic dObj = rec;
var dict = headers.Select((h, i) => new { Key = h, Value = cols[i] }).ToDictionary(kvp => kvp.Key, kvp => (object)kvp.Value);
dObj.SetDictionary(dict);
return(rec);
}
else
{
var expando = parser.CreateInstance <T>();
var expandoDic = (IDictionary <string, object>)expando;
int index = 0;
foreach (var header in headers)
{
expandoDic.Add(header, cols[index++]);
}
return(expando);
}
}
else
{
var rec = parser.CreateInstance <T>();
if (positionalMapping)
{
PropertyInfo[] props = GetPropertyInfos <T>();
int index = 0;
string col = null;
Type propType = null;
foreach (var prop in props)
{
if (index < cols.Length)
{
propType = props[index].PropertyType;
col = cols[index++];
ChoType.SetPropertyValue(rec, prop, ChoConvert.ConvertTo(col, propType));
}
else
{
break;
}
}
}
else
{
Dictionary <string, PropertyInfo> propDict = GetPropertyInfoDictionary <T>();
int index = 0;
string col = null;
Type propType = null;
PropertyInfo prop = null;
foreach (var header in headers)
{
if (propDict.ContainsKey(header))
{
prop = propDict[header];
if (prop != null)
{
propType = prop.PropertyType;
col = cols[index++];
ChoType.SetPropertyValue(rec, prop, ChoConvert.ConvertTo(col, propType));
}
}
}
}
return(rec);
}
}
}
