private IColumnHandler[] GetHandlersByColumnIndex(IReadOnlyList <string> columnNames, out List <string> columnNamesToOutput)
{
columnNamesToOutput = new List <string>();
IColumnHandler[] handlers = new IColumnHandler[columnNames.Count];
for (int i = 0; i < columnNames.Count; ++i)
{
string columnName = columnNames[i];
IColumnHandler handler;
if (this.DropColumns.Contains(columnName))
{
handler = null;
}
else
{
columnNamesToOutput.Add(columnName);
if (!this.HandlersByColumn.TryGetValue(columnName, out handler))
{
handler = new KeepColumnHandler();
}
}
handlers[i] = handler;
}
return(handlers);
}
/// <summary>
/// Translate a single literal value to the sanitized form, given the value
/// and which column it is from. Uses the mapper configured for the column in
/// the spec file.
/// </summary>
/// <param name="value">Value to convert</param>
/// <param name="columnName">ColumnName value is from</param>
/// <returns>Sanitized version of value</returns>
public string Translate(string value, string columnName)
{
IColumnHandler handler;
// If there's no handler, there's no re-mapping
if (!this.HandlersByColumn.TryGetValue(columnName, out handler))
{
handler = new KeepColumnHandler();
}
// Convert and return the value
String8 value8 = String8.Convert(value, new byte[String8.GetLength(value)]);
String8 replacement = this.HandlersByColumn[columnName].Sanitize(value8);
return(replacement.ToString());
}