/// ///////////////////////////////////////////////////////////////////////
/// ReadObject
///
/// <summary>
/// Creates an object of type T from the data in row and returns that object.
///
/// </summary>
/// <param name="row"></param>
/// <param name="firstRow"></param>
/// <returns></returns>
public T ReadObject(IDataRow row, AggregatedException ae)
{
//If there are more columns than the required
if (row.Count > m_IndexToInfo.Length)
{
//Are we ignoring unknown columns?
if (!m_fileDescription.IgnoreUnknownColumns)
{
// Too many fields
throw new TooManyDataFieldsException(typeof(T).ToString(), row[0].LineNbr, m_fileName);
}
}
// -----
T obj = new T();
//If we will be using the mappings, we just iterate through all the cells in this row
int maxRowCount = _mappingIndexes.Count > 0 ? row.Count : Math.Min(row.Count, m_IndexToInfo.Length);
for (int i = 0; i < maxRowCount; i++)
{
TypeFieldInfo tfi;
//If there is some index mapping generated and the IgnoreUnknownColums is `true`
if (m_fileDescription.IgnoreUnknownColumns && _mappingIndexes.Count > 0)
{
if (!_mappingIndexes.ContainsKey(i))
{
continue;
}
tfi = m_IndexToInfo[_mappingIndexes[i]];
}
else
{
tfi = m_IndexToInfo[i];
}
if (m_fileDescription.EnforceCsvColumnAttribute &&
(!tfi.hasColumnAttribute))
{
// enforcing column attr, but this field/prop has no column attr.
// So there are too many fields in this record.
throw new TooManyNonCsvColumnDataFieldsException(typeof(T).ToString(), row[i].LineNbr, m_fileName);
}
// -----
if ((!m_fileDescription.FirstLineHasColumnNames) &&
(tfi.index == CsvColumnAttribute.mc_DefaultFieldIndex))
{
// First line in the file does not have field names, so we're
// depending on the FieldIndex of each field in the type
// to ensure each value is placed in the correct field.
// However, now hit a field where there is no FieldIndex.
throw new MissingFieldIndexException(typeof(T).ToString(), row[i].LineNbr, m_fileName);
}
// -----
if (m_fileDescription.UseFieldIndexForReadingData && (!m_fileDescription.FirstLineHasColumnNames) &&
(tfi.index > row.Count))
{
// First line in the file does not have field names, so we're
// depending on the FieldIndex of each field in the type
// to ensure each value is placed in the correct field.
// However, now hit a field where the FieldIndex is bigger
// than the total number of items in a row generated by the separatorChar
throw new WrongFieldIndexException(typeof(T).ToString(), row[i].LineNbr, m_fileName);
}
int index = m_fileDescription.UseFieldIndexForReadingData ? tfi.index - 1 : i;
// value to put in the object
string value = row[index].Value;
if (value == null)
{
if (!tfi.canBeNull)
{
ae.AddException(
new MissingRequiredFieldException(
typeof(T).ToString(),
tfi.name,
row[i].LineNbr,
m_fileName));
}
}
else
{
try
{
Object objValue = null;
// Normally, either tfi.typeConverter is not null,
// or tfi.parseNumberMethod is not null.
//
if (tfi.typeConverter != null)
{
objValue = tfi.typeConverter.ConvertFromString(
null,
m_fileDescription.FileCultureInfo,
value);
}
else if (tfi.parseExactMethod != null)
{
objValue =
tfi.parseExactMethod.Invoke(
tfi.fieldType,
new Object[] {
value,
tfi.outputFormat,
m_fileDescription.FileCultureInfo
});
}
else if (tfi.parseNumberMethod != null)
{
objValue =
tfi.parseNumberMethod.Invoke(
tfi.fieldType,
new Object[] {
value,
tfi.inputNumberStyle,
m_fileDescription.FileCultureInfo
});
}
else
{
// No TypeConverter and no Parse method available.
// Try direct approach.
objValue = value;
}
if (tfi.memberInfo is PropertyInfo)
{
((PropertyInfo)tfi.memberInfo).SetValue(obj, objValue, null);
}
else
{
((FieldInfo)tfi.memberInfo).SetValue(obj, objValue);
}
}
catch (Exception e)
{
if (e is TargetInvocationException)
{
e = e.InnerException;
}
if (e is FormatException)
{
e = new WrongDataFormatException(
typeof(T).ToString(),
tfi.name,
value,
row[i].LineNbr,
m_fileName,
e);
}
ae.AddException(e);
}
}
}
// Visit any remaining fields in the type for which no value was given
// in the data row, to see whether any of those was required.
// If only looking at fields with CsvColumn attribute, do ignore
// fields that don't have that attribute.
for (int i = row.Count; i < m_IndexToInfo.Length; i++)
{
TypeFieldInfo tfi = m_IndexToInfo[i];
if (((!m_fileDescription.EnforceCsvColumnAttribute) ||
tfi.hasColumnAttribute) &&
(!tfi.canBeNull))
{
ae.AddException(
new MissingRequiredFieldException(
typeof(T).ToString(),
tfi.name,
row[row.Count - 1].LineNbr,
m_fileName));
}
}
return(obj);
}
/// ///////////////////////////////////////////////////////////////////////
/// ReadObject
/// <summary>
/// Creates an object of type T from the data in row and returns that object.
/// </summary>
/// <param name="row"></param>
/// <param name="firstRow"></param>
/// <returns></returns>
public T ReadObject(IDataRow row, AggregatedException ae)
{
//If there are more columns than the required
if (row.Count > m_IndexToInfo.Length)
{
if (!m_fileDescription.IgnoreUnknownColumns)
{
throw new TooManyDataFieldsException(typeof(T).ToString(), row[0].LineNbr, m_fileName);
}
}
// -----
var obj = new T();
//If we will be using the mappings, we just iterate through all the cells in this row
var maxRowCount = _mappingIndexes.Count > 0 ? row.Count : Math.Min(row.Count, m_IndexToInfo.Length);
for (var i = 0; i < maxRowCount; i++)
{
TypeFieldInfo tfi;
//If there is some index mapping generated and the IgnoreUnknownColums is `true`
if (m_fileDescription.IgnoreUnknownColumns && _mappingIndexes.Count > 0)
{
if (!_mappingIndexes.ContainsKey(i))
{
continue;
}
tfi = m_IndexToInfo[_mappingIndexes[i]];
}
else
{
tfi = m_IndexToInfo[i];
}
if (m_fileDescription.EnforceCsvColumnAttribute &&
!tfi.hasColumnAttribute)
{
throw new TooManyNonCsvColumnDataFieldsException(typeof(T).ToString(), row[i].LineNbr, m_fileName);
}
// -----
if (!m_fileDescription.FirstLineHasColumnNames &&
tfi.index == CsvColumnAttribute.mc_DefaultFieldIndex)
{
throw new MissingFieldIndexException(typeof(T).ToString(), row[i].LineNbr, m_fileName);
}
// -----
if (m_fileDescription.UseFieldIndexForReadingData && !m_fileDescription.FirstLineHasColumnNames &&
tfi.index > row.Count)
{
throw new WrongFieldIndexException(typeof(T).ToString(), row[i].LineNbr, m_fileName);
}
var index = m_fileDescription.UseFieldIndexForReadingData ? tfi.index - 1 : i;
// value to put in the object
var value = row[index].Value;
if (value == null)
{
if (!tfi.canBeNull)
{
ae.AddException(
new MissingRequiredFieldException(
typeof(T).ToString(),
tfi.name,
row[i].LineNbr,
m_fileName));
}
}
else
{
try
{
object objValue = null;
// Normally, either tfi.typeConverter is not null,
// or tfi.parseNumberMethod is not null.
//
if (tfi.typeConverter != null)
{
objValue = tfi.typeConverter.ConvertFromString(
null,
m_fileDescription.FileCultureInfo,
value);
}
else if (tfi.parseExactMethod != null)
{
objValue =
tfi.parseExactMethod.Invoke(
tfi.fieldType,
new object[]
{
value,
tfi.outputFormat,
m_fileDescription.FileCultureInfo
});
}
else if (tfi.parseNumberMethod != null)
{
objValue =
tfi.parseNumberMethod.Invoke(
tfi.fieldType,
new object[]
{
value,
tfi.inputNumberStyle,
m_fileDescription.FileCultureInfo
});
}
else
{
objValue = value;
}
switch (tfi.memberInfo)
{
case PropertyInfo property:
property.SetValue(obj, objValue, null);
break;
case FieldInfo field:
field.SetValue(obj, objValue);
break;
}
}
catch (Exception e)
{
if (e is TargetInvocationException)
{
e = e.InnerException;
}
if (e is FormatException)
{
e = new WrongDataFormatException(
typeof(T).ToString(),
tfi.name,
value,
row[i].LineNbr,
m_fileName,
e);
}
ae.AddException(e);
}
}
}
// Visit any remaining fields in the type for which no value was given
// in the data row, to see whether any of those was required.
// If only looking at fields with CsvColumn attribute, do ignore
// fields that don't have that attribute.
for (var i = row.Count; i < m_IndexToInfo.Length; i++)
{
var tfi = m_IndexToInfo[i];
if ((!m_fileDescription.EnforceCsvColumnAttribute ||
tfi.hasColumnAttribute) &&
!tfi.canBeNull)
{
ae.AddException(
new MissingRequiredFieldException(
typeof(T).ToString(),
tfi.name,
row[row.Count - 1].LineNbr,
m_fileName));
}
}
return(obj);
}
