public bool Validate(string textSource, string marker, ITargetRule targetRule)
{
if (textSource == null)
{
throw new ArgumentNullException("textSource");
}
if (marker == null)
{
throw new ArgumentNullException("matchingText");
}
if (IsNegative(targetRule.CharacterLength))
{
throw new CustomExceptions.TextExtractorException(Constant.ErrorMessages.CHARACTER_LENGTH_IS_NEGATIVE);
}
if (IsNegative(targetRule.Occurrence))
{
throw new CustomExceptions.TextExtractorException(Constant.ErrorMessages.OCCURRENCE_LENGTH_IS_NEGATIVE);
}
if (targetRule.MarkerEnum == Constant.MarkerEnum.PlainText && marker.Length > textSource.Length)
{
throw new CustomExceptions.TextExtractorException(Constant.ErrorMessages.MATCHING_TEXT_LENGTH_GREATER_THAN_TEXT_SOURCE_LENGTH);
}
return(true);
}
public string ExtractText(string textSource, string startMarker, string stopMarker, ITargetRule targetRule)
{
this.TargetRule = targetRule;
this.StopMarker = stopMarker;
this.extractionsEnd = targetRule.MaximumExtractions + targetRule.Occurrence;
if (targetRule.CharacterLength > Constant.Sizes.EXTRACTOR_TARGET_TEXT_CHARACTERS_MAXIMUM || targetRule.CharacterLength < Constant.Sizes.EXTRACTOR_TARGET_TEXT_CHARACTERS_MINIMUM)
{
throw new CustomExceptions.TextExtractorException(string.Format("Number of Characters is not between {0} and {1}.", Constant.Sizes.EXTRACTOR_TARGET_TEXT_CHARACTERS_MINIMUM, Constant.Sizes.EXTRACTOR_TARGET_TEXT_CHARACTERS_MAXIMUM));
}
if (targetRule.Occurrence > Constant.Sizes.EXTRACTOR_TARGET_TEXT_OCCURENCE_MAXIMUM || targetRule.Occurrence < Constant.Sizes.EXTRACTOR_TARGET_TEXT_OCCURENCE_MINIMUM)
{
throw new CustomExceptions.TextExtractorException(string.Format("Occurrence is not between {0} and {1}.", Constant.Sizes.EXTRACTOR_TARGET_TEXT_OCCURENCE_MINIMUM, Constant.Sizes.EXTRACTOR_TARGET_TEXT_OCCURENCE_MAXIMUM));
}
try
{
//validate inputs
TextExtractionValidator.Validate(textSource, startMarker, targetRule);
ExtractTextByMarker(textSource, startMarker);
}
catch (Exception ex)
{
throw new CustomExceptions.TextExtractorException(Constant.ErrorMessages.DEFAULT_TEXT_EXTRACTION_ERROR_MESSAGE, ex);
}
string result = null;
if (this.textExtracted.Count >= targetRule.MinimumExtractions)
{
result = String.Join(targetRule.CustomDelimiter, this.textExtracted);
this.IsMarkerFound = true;
}
else
{
this.IsMarkerFound = false;
}
return(result);
}
