/// <summary>
/// Parses a string of text containing tagged words, e.g. "LASI/NNP can/MD sniff-out/VBP
/// the/DT problem/NN", and returns of the collection containing, for each word, the
/// function which will create the Part of Speech subtyped <see cref="Word"/> instance representing that word.
/// </summary>
/// <param name="text">A string containing tagged words.</param>
/// <returns>
/// The List of constructor function instances which, when invoked, create the instances
/// <see cref="Word"/> which represent each word in the source
/// </returns>
protected virtual List <Lazy <Word> > CreateWordExpressions(string text)
{
var wordExpressions = new List <Lazy <Word> >();
var elements = GetTaggedWordStrings(text);
var posExtractor = new TaggedWordExtractor();
var wordFactory = new WordFactory(wordTagset);
foreach (var element in elements)
{
var textTagPair = posExtractor.Extract(element);
if (textTagPair.HasValue)
{
var pair = textTagPair.Value;
try
{
wordExpressions.Add(new Lazy <Word>(() => wordFactory.Create(pair)));
}
catch (UnknownWordTagException e)
{
Logger.Log(
$@"{e.Message}
Text: {pair.Text}
Instantiating new {nameof(Lazy<UnknownWord>)} holding the literal content, {element}, to compensate."
);
wordExpressions.Add(new Lazy <Word>(() => new UnknownWord(pair.Text)));
}
}
}
return(wordExpressions);
}
/// <summary>
/// Parses a string of text containing tagged words e.g. "LASI/NNP can/MD sniff-out/VBP
/// the/DT problem/NN" into a collection of Part of Speech subtyped LASI.Algorithm.Word
/// instances which represent them.
/// </summary>
/// <param name="text">
/// A string containing tagged words from which to instantiate <see cref="Word"/> instances.
/// </param>
/// <returns>
/// The collection of Part of Speech subtyped <see cref="Word"/> instances each
/// corresponding to a tagged word element.
/// </returns>
protected virtual List <Word> CreateWords(string text)
{
var parsedWords = new List <Word>();
var wordExtractor = new TaggedWordExtractor();
var factory = new WordFactory(wordTagset);
foreach (var taggedToken in GetTaggedWordStrings(text))
{
var textTagPair = wordExtractor.Extract(taggedToken);
if (textTagPair.HasValue)
{
var pair = textTagPair.Value;
try
{
parsedWords.Add(factory.Create(pair));
}
catch (PartOfSpeechTagException e) when(e is EmptyWordTagException || e is UnknownWordTagException)
{
Logger.Log(
$@"{e.Message}
Text: {pair.Text}
Instantiating new {nameof(UnknownWord)} to compensate.
Attempting to parse data: {taggedToken}"
);
parsedWords.Add(new UnknownWord(pair.Text));
}
catch (EmptyOrWhiteSpaceStringTaggedAsWordException x)
{
Logger.Log($"\n{x.Message} + \nDiscarding");
}
}
}
return(parsedWords);
}