/// <summary>
/// Constructs a big string representing the input list of CoreLabel,
/// with one line per token using the following format
/// word label feat1 feat2 ...
/// </summary>
/// <remarks>
/// Constructs a big string representing the input list of CoreLabel,
/// with one line per token using the following format
/// word label feat1 feat2 ...
/// (where each space is actually a tab).
/// Assumes that CoreLabel has both TextAnnotation and AnswerAnnotation.
/// </remarks>
/// <param name="document">
/// List of CoreLabel
/// (does not have to represent a "document", just a sequence of text,
/// like a sentence or a paragraph)
/// </param>
/// <returns>String representation of features</returns>
private string GetFeatureString(IList <In> document)
{
int docSize = document.Count;
if (classifier.flags.useReverse)
{
Java.Util.Collections.Reverse(document);
}
StringBuilder sb = new StringBuilder();
for (int j = 0; j < docSize; j++)
{
IN token = document[j];
sb.Append(token.Get(typeof(CoreAnnotations.TextAnnotation)));
sb.Append(delimiter);
sb.Append(token.Get(typeof(CoreAnnotations.AnswerAnnotation)));
CRFDatum <IList <string>, CRFLabel> d = classifier.MakeDatum(document, j, classifier.featureFactories);
IList <IList <string> > features = d.AsFeatures();
foreach (ICollection <string> cliqueFeatures in features)
{
IList <string> sortedFeatures = new List <string>(cliqueFeatures);
sortedFeatures.Sort();
foreach (string feat in sortedFeatures)
{
feat = UbPrefixFeatureString(feat);
sb.Append(delimiter);
sb.Append(feat);
}
}
sb.Append(eol);
}
if (classifier.flags.useReverse)
{
Java.Util.Collections.Reverse(document);
}
return(sb.ToString());
}