private IEnumerable <string> TokenizeSearch(string search)
{
var analyser = new StandardAnalyzer(LuceneVersion.LUCENE_48);
var tokens = analyser.GetTokenStream(null, search);
var attr = tokens.GetAttribute <ICharTermAttribute>();
tokens.Reset();
while (tokens.IncrementToken())
{
yield return(attr.ToString());
}
}
public static List <Token> GetTokens(string value)
{
List <Token> tokens = new List <Token>();
#if LUCENE
var analyzer = new StandardAnalyzer(LuceneVersion.LUCENE_48);
TokenStream stream = analyzer.GetTokenStream("fullName", new StringReader(value));
stream.Reset();
while (stream.IncrementToken())
{
var term = stream.GetAttribute <ICharTermAttribute>().ToString();
var pos = stream.GetAttribute <IOffsetAttribute>();
tokens.Add(new Token()
{
Text = term, StartOffset = pos.StartOffset, EndOffset = pos.EndOffset
});
}
#else
StringBuilder sb = new StringBuilder();
int iStart = 0;
for (int iCh = 0; iCh < value.Length; iCh++)
{
char ch = value[iCh];
if (char.IsWhiteSpace(ch))
{
if (sb.Length > 0)
{
tokens.Add(new Token()
{
Text = sb.ToString(), StartOffset = iStart, EndOffset = iCh
});
}
sb.Clear();
iStart = iCh;
}
else if (ch != '-' && char.IsPunctuation(ch))
{
// if we are building a token, add it
if (sb.Length > 0)
{
tokens.Add(new Token()
{
Text = sb.ToString(), StartOffset = iStart, EndOffset = iCh
});
}
sb.Clear();
// add the Punctuation as a token
iStart = iCh;
tokens.Add(new Token()
{
Text = ch.ToString(), StartOffset = iStart, EndOffset = iCh + 1
});
}
else
{
if (sb.Length == 0)
{
iStart = iCh;
}
sb.Append(ch);
}
}
if (sb.Length > 0)
{
tokens.Add(new Token()
{
Text = sb.ToString(), StartOffset = iStart, EndOffset = value.Length
});
}
#endif
return(tokens);
}