public object RawGetValueOrDefaultFromMapIndex(int mapIndex)
{
//this check plan
//get data from reader at original field
//lets do proper conv technique
MySqlFieldMap mapField = mapFields[mapIndex];
object value = reader.GetValue(mapField.OriginalFieldIndex);
#if DEBUG
Type srcType = value.GetType();
#endif
switch (mapField.ConvTechnique)
{
case MySqlDataConversionTechnique.Direct:
return(value);
case MySqlDataConversionTechnique.GenString:
//gen to string
return(value.ToString());
case MySqlDataConversionTechnique.GenDateTime:
return(DateTime.Parse(value.ToString()));
case MySqlDataConversionTechnique.BlobToString:
//
return(value.ToString());
case MySqlDataConversionTechnique.StringToString:
//
if (stringConverter != null)
{
//use string converter to convert again
return(stringConverter.Conv((string)value));
}
else
{
return(value.ToString());
}
case MySqlDataConversionTechnique.DecimalToDecimal:
{
return((decimal)value);
}
case MySqlDataConversionTechnique.DecimalToDouble:
{
return(Convert.ToDouble((decimal)value));
}
case MySqlDataConversionTechnique.DecimalToFloat:
{
return((float)Convert.ToDouble(value));
}
default:
throw new NotSupportedException();
}
}
protected void EvaluateTargetStructure(Type t)
{
//evaluate target objet definition
//check current table defintioin first ***
MySqlSubTable subTable = reader.CurrentSubTable;
//get all public instance fields from current type
FieldInfo[] allFields = GetPublicInstanceFields(t);
//we iterate all request fields
int j = allFields.Length;
mapFields.Clear();
for (int i = 0; i < j; ++i)
{
FieldInfo field = allFields[i];
MySqlFieldDefinition fieldDef = subTable.GetFieldDefinition(field.Name);
//----------------------------------
//check field type conversion
//1. some basic can do direct conversion
//2. use can provide custom protocol for field conversion
//3. some need user decision
//----------------------------------
//in this version we support only primitive type ***
MySqlDataConversionTechnique foundConv;
if (!MySqlTypeConversionInfo.TryGetImplicitConversion((MySqlDataType)fieldDef.FieldType,
field.FieldType, out foundConv))
{
//not found
//TODO:
//so make notification by let use make a dicision
throw new NotSupportedException();
}
//-----------------
MySqlFieldMap fieldMap =
fieldDef.IsEmpty ?
new MySqlFieldMap(-1, fieldDef.Name, foundConv) :
new MySqlFieldMap(fieldDef.FieldIndex, fieldDef.Name, foundConv);
fieldMap.resolvedFieldInfo = field;
mapFields.Add(fieldMap);
}
}
protected void EvaluateTableDefinition(MethodInfo met)
{
//check current table defintioin first ***
MySqlSubTable subTable = reader.CurrentSubTable;
var metPars = met.GetParameters();
//target method that we need
int j = metPars.Length;//**
mapFields.Clear();
for (int i = 1; i < j; ++i)
{
//get parameter fieldname
//and type and check proper type conversion
ParameterInfo metPar = metPars[i];
MySqlFieldDefinition fieldDef = subTable.GetFieldDefinition(metPar.Name);
//----------------------------------
//check field type conversion
//1. some basic can do direct conversion
//2. use can provide custom protocol for field conversion
//3. some need user decision
//----------------------------------
//in this version we support only primitive type ***
MySqlDataConversionTechnique foundConv;
if (!MySqlTypeConversionInfo.TryGetImplicitConversion((MySqlDataType)fieldDef.FieldType, metPar.ParameterType, out foundConv))
{
//not found
//TODO:
//so make notification by let use make a dicision
throw new NotSupportedException();
}
//-----------------
MySqlFieldMap fieldMap =
fieldDef.IsEmpty ?
new MySqlFieldMap(-1, fieldDef.Name, foundConv) :
new MySqlFieldMap(fieldDef.FieldIndex, fieldDef.Name, foundConv);
mapFields.Add(fieldMap);
}
}
