// object[] values, int index, ForwardReader reader
internal object ExtractValue(LineInfo line)
{
//-> extract only what I need
if (mInNewLine)
{
if (line.EmptyFromPos() == false)
{
throw new BadUsageException("Text '" + line.CurrentString +
"' found before the new line of the field: " + mFieldInfo.Name +
" (this is not allowed when you use [FieldInNewLine])");
}
line.ReLoad(line.mReader.ReadNextLine());
if (line.mLineStr == null)
{
throw new BadUsageException("End of stream found parsing the field " + mFieldInfo.Name +
". Please check the class record.");
}
}
var info = ExtractFieldString(line);
if (info.mCustomExtractedString == null)
{
line.mCurrentPos = info.ExtractedTo + 1;
}
line.mCurrentPos += mCharsToDiscard; //total;
return(AssignFromString(info, line));
//-> discard the part that I use
//TODO: Uncoment this for Quoted Handling
// if (info.NewRestOfLine != null)
// {
// if (info.NewRestOfLine.Length < CharsToDiscard())
// return info.NewRestOfLine;
// else
// return info.NewRestOfLine.Substring(CharsToDiscard());
// }
// else
// {
// int total;
// if (info.CharsRemoved >= line.mLine.Length)
// total = line.mLine.Length;
// else
// total = info.CharsRemoved + CharsToDiscard();
//return buffer.Substring(total);
// }
}
private ExtractedInfo BasicExtractString(LineInfo line)
{
ExtractedInfo res;
if (mIsLast)
{
res = new ExtractedInfo(line);
}
else
{
int sepPos;
sepPos = line.IndexOf(mSeparator);
if (sepPos == -1)
{
if (mNextIsOptional == false)
{
string msg = null;
if (mIsFirst && line.EmptyFromPos())
{
msg = "The line " + line.mReader.LineNumber.ToString() + " is empty. Maybe you need to use the attribute [IgnoreEmptyLines] in your record class.";
}
else
{
msg = "The delimiter '" + mSeparator + "' can´t be found after the field '" + mFieldInfo.Name + "' at line " + line.mReader.LineNumber.ToString() + " (the record has less fields, the delimiter is wrong or the next field must be marked as optional).";
}
throw new FileHelpersException(msg);
}
else
{
sepPos = line.mLine.Length - 1;
}
}
res = new ExtractedInfo(line, sepPos);
}
return(res);
}
private Visyn.Windows.Io.FileHelper.Core.ExtractedInfo BasicExtractString(LineInfo line)
{
if (IsLast && !IsArray)
{
if (line.IndexOf(Separator) == -1)
{
return(new Visyn.Windows.Io.FileHelper.Core.ExtractedInfo(line));
}
// Now check for one extra separator
throw new BadUsageException(line.mReader.LineNumber, line.mCurrentPos,
$"Delimiter '{Separator}' found after the last field '{FieldInfo.Name}' (the file is wrong or you need to add a field to the record class)");
}
var sepPos = line.IndexOf(Separator);
if (sepPos != -1)
{
return(new Visyn.Windows.Io.FileHelper.Core.ExtractedInfo(line, sepPos));
}
if (IsLast && IsArray)
{
return(new Visyn.Windows.Io.FileHelper.Core.ExtractedInfo(line));
}
if (NextIsOptional == false)
{
if (IsFirst && line.EmptyFromPos())
{
throw new FileHelpersException(line.mReader.LineNumber, line.mCurrentPos,
$"The line {line.mReader.LineNumber} is empty. Maybe you need to use the attribute [IgnoreEmptyLines] in your record class.");
}
throw new FileHelpersException(line.mReader.LineNumber, line.mCurrentPos,
$"Delimiter '{Separator}' not found after field '{FieldInfo.Name}' (the record has less fields, the delimiter is wrong or the next field must be marked as optional).");
}
sepPos = line.mLineStr.Length;
return(new Visyn.Windows.Io.FileHelper.Core.ExtractedInfo(line, sepPos));
}
/// <summary>
/// Get the data out of the records
/// </summary>
/// <param name="line">Line handler containing text</param>
/// <returns></returns>
public object ExtractFieldValue(LineInfo line)
{
//-> extract only what I need
if (InNewLine)
{ // Any trailing characters, terminate
if (line.EmptyFromPos() == false)
{
throw new BadUsageException(line, $"Text '{line.CurrentString}' found before the new line of the field: {FieldInfo.Name} (this is not allowed when you use [FieldInNewLine])");
}
line.ReLoad(line.mReader.ReadNextLine());
if (line.mLineStr == null)
{
throw new BadUsageException(line, $"End of stream found parsing the field {FieldInfo.Name}. Please check the class record.");
}
}
if (IsArray == false)
{
var info = ExtractFieldString(line);
if (info.mCustomExtractedString == null)
{
line.mCurrentPos = info.ExtractedTo + 1;
}
line.mCurrentPos += CharsToDiscard; //total;
return(Discarded ? GetDiscardedNullValue() : AssignFromString(info, line).Value);
}
if (ArrayMinLength <= 0)
{
ArrayMinLength = 0;
}
var i = 0;
var res = new ArrayList(Math.Max(ArrayMinLength, 10));
while (line.mCurrentPos - CharsToDiscard < line.mLineStr.Length && i < ArrayMaxLength)
{
var info = ExtractFieldString(line);
if (info.mCustomExtractedString == null)
{
line.mCurrentPos = info.ExtractedTo + 1;
}
line.mCurrentPos += CharsToDiscard;
try
{
var value = AssignFromString(info, line);
if (value.NullValueUsed && i == 0 && line.IsEOL())
{
break;
}
res.Add(value.Value);
}
catch (NullValueNotFoundException)
{
if (i == 0)
{
break;
}
throw;
}
i++;
}
if (res.Count < ArrayMinLength)
{
throw new InvalidOperationException($"Line: {line.mReader.LineNumber} Column: {line.mCurrentPos} Field: {FieldInfo.Name}. The array has only {res.Count} values, less than the minimum length of {ArrayMinLength}");
}
if (IsLast && line.IsEOL() == false)
{
throw new InvalidOperationException($"Line: {line.mReader.LineNumber} Column: {line.mCurrentPos} Field: {FieldInfo.Name}. The array has more values than the maximum length of {ArrayMaxLength}");
}
// TODO: is there a reason we go through all the array processing then discard it
return(Discarded ? null : res.ToArray(ArrayType));
}
