/// <summary>
/// Extract the field from the delimited file, removing separators and quotes
/// and any duplicate quotes within the record
/// </summary>
/// <param name="line">line containing record input</param>
/// <returns>Extract information</returns>
public override ExtractedInfo ExtractFieldString(LineInfo line)
{
if (IsOptional && line.IsEOL())
{
return(Visyn.Windows.Io.FileHelper.Core.ExtractedInfo.Empty);
}
if (QuoteChar == '\0')
{
return(BasicExtractString(line));
}
if (TrimMode == TrimMode.Both || TrimMode == TrimMode.Left)
{
line.TrimStart(TrimChars);
}
var quotedStr = QuoteChar.ToString();
if (line.StartsWith(quotedStr))
{
var res = StringHelper.ExtractQuotedString(line,
QuoteChar,
QuoteMultiline == MultilineMode.AllowForBoth || QuoteMultiline == MultilineMode.AllowForRead);
if (TrimMode == TrimMode.Both || TrimMode == TrimMode.Right)
{
line.TrimStart(TrimChars);
}
if (!IsLast &&
!line.StartsWith(Separator) &&
!line.IsEOL())
{
throw new BadUsageException(line,
"The field " + FieldInfo.Name + " is quoted but the quoted char: " + quotedStr +
" not is just before the separator (You can use [FieldTrim] to avoid this error)");
}
return(res);
}
if (QuoteMode == QuoteMode.OptionalForBoth ||
QuoteMode == QuoteMode.OptionalForRead)
{
return(BasicExtractString(line));
}
if (line.StartsWithTrim(quotedStr))
{
throw new BadUsageException(
$"The field '{FieldInfo.Name}' has spaces before the QuotedChar at line {line.mReader.LineNumber}. Use the TrimAttribute to by pass this error. Field String: {line.CurrentString}");
}
throw new BadUsageException(
$"The field '{FieldInfo.Name}' does not begin with the QuotedChar at line {line.mReader.LineNumber}. You can use FieldQuoted(QuoteMode.OptionalForRead) to allow optional quoted field. Field String: {line.CurrentString}");
}
/// <summary>
/// Extract a string from a quoted string, allows for doubling the quotes
/// for example 'o''clock'
/// </summary>
/// <param name="line">Line to extract from (with extra info)</param>
/// <param name="quoteChar">Quote char to remove</param>
/// <param name="allowMultiline">can we have a new line in middle of string</param>
/// <returns>Extracted information</returns>
internal static ExtractedInfo ExtractQuotedString(LineInfo line, char quoteChar, bool allowMultiline)
{
// if (line.mReader == null)
// throw new BadUsageException("The reader can´t be null");
if (line.IsEOL())
{
throw new BadUsageException(
"An empty String found. This can not be parsed like a QuotedString try to use SafeExtractQuotedString");
}
if (line.mLineStr[line.mCurrentPos] != quoteChar)
{
throw new BadUsageException("The source string does not begin with the quote char: " + quoteChar);
}
var res = new StringBuilder(32);
bool firstFound = false;
int i = line.mCurrentPos + 1;
//bool mustContinue = true;
while (line.mLineStr != null)
{
while (i < line.mLineStr.Length)
{
if (line.mLineStr[i] == quoteChar)
{
if (firstFound)
{
// Is an escaped quoted char
res.Append(quoteChar);
firstFound = false;
}
else
{
firstFound = true;
}
}
else
{
if (firstFound)
{
// This was the end of the string
line.mCurrentPos = i;
return(new ExtractedInfo(res.ToString()));
}
else
{
res.Append(line.mLineStr[i]);
}
}
i++;
}
if (firstFound)
{
line.mCurrentPos = i;
return(new ExtractedInfo(res.ToString()));
}
else
{
if (allowMultiline == false)
{
throw new BadUsageException("The current field has an unclosed quoted string. Complete line: " +
res.ToString());
}
line.ReadNextLine();
res.Append(NewLine);
//lines++;
i = 0;
}
}
throw new BadUsageException("The current field has an unclosed quoted string. Complete Filed String: " +
res.ToString());
}
protected override ExtractedInfo ExtractFieldString(LineInfo line)
{
if (mIsOptional && line.IsEOL())
{
return(ExtractedInfo.Empty);
}
if (mQuoteChar == '\0')
{
return(BasicExtractString(line));
}
else
{
//TODO: UnComment and Fix
if (mTrimMode == TrimMode.Both || mTrimMode == TrimMode.Left)
{
//int pos = line.mCurrentPos;
line.TrimStart(mTrimChars);
// from2 = from.TrimStart(mTrimChars);
//res.CharsRemoved = line.mCurrentPos - pos;
}
var quotedStr = mQuoteChar.ToString();
if (line.StartsWith(quotedStr))
{
// ExtractedInfo res = null;
// res = new ExtractedInfo(line, line.mCurrentPos);
return(StringHelper.ExtractQuotedString(line, mQuoteChar, mQuoteMultiline == MultilineMode.AllowForBoth || mQuoteMultiline == MultilineMode.AllowForRead));
// if (mQuoteMultiline == MultilineMode.AllowForBoth || mQuoteMultiline == MultilineMode.AllowForRead)
// {
//
// //res.ExtractedString = ei.ExtractedString;
// //res.CharsRemoved += ei.CharsRemoved;
// //res.ExtraLines = ei.ExtraLines;
// //res.NewRestOfLine = ei.NewRestOfLine;
// }
// else
// {
// return StringHelper.ExtractQuotedString(from2, mQuoteChar, out index);
// //res.CharsRemoved += index;
// }
// return res;
}
else
{
if (mQuoteMode == QuoteMode.OptionalForBoth || mQuoteMode == QuoteMode.OptionalForRead)
{
return(BasicExtractString(line));
}
else if (line.StartsWithTrim(quotedStr))
{
throw new BadUsageException("The field '" + mFieldInfo.Name + "' has spaces before the QuotedChar at line " + line.mReader.LineNumber.ToString() + ". Use the TrimAttribute to by pass this error. Field String: " + line.CurrentString);
}
else
{
throw new BadUsageException("The field '" + mFieldInfo.Name + "' not begin with the QuotedChar at line " + line.mReader.LineNumber.ToString() + ". You can use FieldQuoted(QuoteMode.OptionalForRead) to allow optional quoted field.. Field String: " + line.CurrentString);
}
}
}
}
/// <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));
}
