public ExtractedInfo(LineInfo line, int extractTo)
{
mLine = line;
ExtractedFrom = line.mCurrentPos;
ExtractedTo = extractTo - 1;
//CharsRemoved = ExtractedTo - ExtractedFrom + 1;
//ExtraLines = 0;
// NewRestOfLine = null;
}
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);
}
}
}
protected override ExtractedInfo ExtractFieldString(LineInfo line)
{
if (line.CurrentLength == 0)
{
if (mIsOptional)
return ExtractedInfo.Empty;
else
throw new BadUsageException("End Of Line found processing the field: " + mFieldInfo.Name + " at line " + line.mReader.LineNumber.ToString() + ". (You need to mark it as [FieldOptional] if you want to avoid this exception)");
}
ExtractedInfo res;
if (line.CurrentLength < mFieldLength)
if (mFixedMode == FixedMode.AllowLessChars || mFixedMode == FixedMode.AllowVariableLength)
res = new ExtractedInfo(line);
else
throw new BadUsageException("The string '" + line.CurrentString + "' (length " + line.CurrentLength.ToString() + ") at line " + line.mReader.LineNumber.ToString() + " has less chars than the defined for " + mFieldInfo.Name + " (" + mFieldLength.ToString() + "). You can use the [FixedLengthRecord(FixedMode.AllowLessChars)] to avoid this problem.");
else if (mIsLast && line.CurrentLength > mFieldLength && mFixedMode != FixedMode.AllowMoreChars && mFixedMode != FixedMode.AllowVariableLength)
throw new BadUsageException("The string '" + line.CurrentString + "' (length " + line.CurrentLength.ToString() + ") at line " + line.mReader.LineNumber.ToString() + " has more chars than the defined for the last field " + mFieldInfo.Name + " (" + mFieldLength.ToString() + ").You can use the [FixedLengthRecord(FixedMode.AllowMoreChars)] to avoid this problem.");
else
res = new ExtractedInfo(line, line.mCurrentPos + mFieldLength);
return res;
}
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;
}
internal object StringToRecord(LineInfo line)
{
if (MustIgnoreLine(line.mLineStr))
return null;
var mValues = new object[mFieldCount];
// array that holds the fields values
for (var i = 0; i < mFieldCount; i++)
{
mValues[i] = mFields[i].ExtractValue(line);
}
CreateAssingMethods();
try
{
// Asign all values via dinamic method that creates an object and assign values
return mCreateHandler(mValues);
}
catch (InvalidCastException)
{
// Occurrs when the a custom converter returns an invalid value for the field.
for (var i = 0; i < mFieldCount; i++)
{
if (mValues[i] != null && ! mFields[i].mFieldType.IsInstanceOfType(mValues[i]))
throw new ConvertException(null, mFields[i].mFieldType, mFields[i].mFieldInfo.Name, line.mReader.LineNumber, -1, "The converter for the field: " + mFields[i].mFieldInfo.Name + " returns an object of Type: " + mValues[i].GetType().Name + " and the field is of type: " + mFields[i].mFieldType.Name);
}
return null;
}
}
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 and can be parsed like a QuotedString try to use SafeExtractQuotedString");
if (line.mLine[line.mCurrentPos] != quoteChar)
throw new BadUsageException("The source string not begins with the quote char: " + quoteChar);
var res = new StringBuilder(32);
//int lines = 0;
var firstFound = false;
var i = line.mCurrentPos + 1;
//bool mustContinue = true;
while (line.mLineStr != null)
{
while (i < line.mLine.Length)
{
if (line.mLine[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());
// ExtractedInfo ei = ;
// return ei;
}
else
{
res.Append(line.mLine[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);
line.ReadNextLine();
res.Append(NewLine);
//lines++;
i = 0;
}
}
throw new BadUsageException("The current field has an unclosed quoted string. Complete Filed String: " + res);
}
internal object AssignFromString(ExtractedInfo fieldString, LineInfo line)
{
object val;
switch (mTrimMode)
{
case TrimMode.None:
break;
case TrimMode.Both:
fieldString.TrimBoth(mTrimChars);
break;
case TrimMode.Left:
fieldString.TrimStart(mTrimChars);
break;
case TrimMode.Right:
fieldString.TrimEnd(mTrimChars);
break;
}
try
{
if (mConvertProvider == null)
{
if (mIsStringField)
val = fieldString.ExtractedString();
else
{
// Trim it to use Convert.ChangeType
fieldString.TrimBoth(WhitespaceChars);
if (fieldString.Length == 0)
{
// Empty stand for null
val = GetNullValue();
}
else
{
val = Convert.ChangeType(fieldString.ExtractedString(), mFieldType, null);
}
}
}
else
{
if (mConvertProvider.CustomNullHandling == false &&
fieldString.HasOnlyThisChars(WhitespaceChars))
{
val = GetNullValue();
}
else
{
var from = fieldString.ExtractedString();
val = mConvertProvider.StringToField(from);
if (val == null)
val = GetNullValue();
}
}
return val;
}
catch (ConvertException ex)
{
var e = ConvertException.ReThrowException(ex, mFieldInfo.Name, line.mReader.LineNumber, fieldString.ExtractedFrom + 1);
throw e;
}
}
// 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);
// }
}
protected abstract ExtractedInfo ExtractFieldString(LineInfo line);
