public IList <SpellCheckCollation> GetSpellingSuggestions(string queryString, IndexReader reader, int maxSpellings, int maxCollations, bool onlyMorePopular)
{
var tokens = _queryConverter.convert(queryString);
if (tokens == null || tokens.isEmpty())
{
return(new SpellCheckCollation[0]);
}
var options = new SpellingOptions(tokens, reader, maxSpellings, onlyMorePopular, true, java.lang.Float.MIN_VALUE);
var spellingResult = _spellChecker.GetSuggestions(options);
if (spellingResult == null)
{
return(new SpellCheckCollation[0]);
}
var collations = SpellCheckCollator.Collate(spellingResult, queryString, maxCollations);
collations.Sort();
return(collations);
}
public SpellingResult GetSuggestions(SpellingOptions options)
{
SpellingResult result = new SpellingResult(options.tokens);
bool haveSuggestions = false;
IndexReader reader = options.reader;
Term term = field != null ? new Term(field, "") : null;
//float theAccuracy = (options.accuracy == java.lang.Float.MIN_VALUE) ? spellChecker.getAccuracy() : options.accuracy;
int count = java.lang.Math.max(options.count, DEFAULT_SUGGESTION_COUNT);
for (var iter = options.tokens.iterator(); iter.hasNext();)
{
Token token = (Token)iter.next();
string tokenText = new string(token.termBuffer(), 0, token.termLength());
string[] suggestions = spellChecker.suggestSimilar(tokenText,
count,
field != null ? reader : null,
field,
options.onlyMorePopular /*, theAccuracy*/);
if (suggestions.Length == 1 && suggestions[0].Equals(tokenText))
{
//These are spelled the same, continue on
continue;
}
if (options.extendedResults && reader != null && field != null)
{
term = term.createTerm(tokenText);
var termFreq = reader.docFreq(term);
result.add(token, termFreq);
// AC: add the original term to suggestions if it's frequent enough
// TODO: make the treshold configurable
if (termFreq > 100)
{
result.add(token, tokenText, termFreq);
}
int countLimit = java.lang.Math.min(options.count, suggestions.Length);
if (countLimit > 0)
{
for (int i = 0; i < countLimit; i++)
{
term = term.createTerm(suggestions[i]);
result.add(token, suggestions[i], reader.docFreq(term));
haveSuggestions = true;
}
}
}
else
{
if (suggestions.Length > 0)
{
List /*<String>*/ suggList = Arrays.asList(suggestions);
if (suggestions.Length > options.count)
{
suggList = suggList.subList(0, options.count);
}
result.add(token, suggList);
haveSuggestions = true;
}
}
}
return(haveSuggestions? result : null);
}
