public TextReader GetText(ulong docId, ulong fieldId)
{
var key = GetKeyForPositions('T', docId, fieldId);
var matcher = new DfaTermMatcher(new SequenceMatcher <char>(key, false));
var term = PosIndex.GetTerms(matcher).Single();
return(PositionsReader.GetText(term.Value.Offset));
}
private ISearchQuery CompileWord(WordAstQuery wordQuery)
{
var matcher = new DfaTermMatcher(new SequenceMatcher <char>(wordQuery.Value, false));
var postingList = index.GetTerms(matcher).Select(p => index.PostingLists.Get(p.Value)).SingleOrDefault();
if (postingList == null)
{
return(NullQuery.Instance);
}
return(new TermQuery(postingList));
}
public IEnumerable <TextPosition> GetPositions(ulong docId, ulong fieldId)
{
var key = GetKeyForPositions('P', docId, fieldId);
var matcher = new DfaTermMatcher(new SequenceMatcher <char>(key, false));
var term = PosIndex.GetTerms(matcher).Single();
var offset = -1;
foreach (var pos in PositionsReader.Get(term.Value.Offset))
{
if (offset == -1)
{
offset = (int)pos;
}
else
{
yield return(TextPosition.P(offset - 1, (int)pos - offset));
offset = -1;
}
}
}
public static IEnumerable <DictionaryTerm> GetTerms(this IFullTextIndex index, string word, int distance)
{
var matcher = new DfaTermMatcher(new LevenshteinMatcher(word, distance));
return(index.GetTerms(matcher));
}
public static IEnumerable <DictionaryTerm> GetTerms(this IFullTextIndex index, string wildcardPattern)
{
var matcher = new DfaTermMatcher(new WildcardMatcher(wildcardPattern, index.Header.MaxTokenSize));
return(index.GetTerms(matcher));
}