protected IndexSequence SearchField(string field, string value)
{
try
{
IndexSequence seq = this[FIELD_NAME_CHAR + field.ToLower()];
IndexSequence newseq = SearchWord(value.ToLower());
seq.R = -1;
return(seq * newseq);
}
catch (Exception e)
{
/* NOT FOUND */
}
return(new IndexSequence());
/*
* var _matches = Regex.Matches(value, @"\b\w+\b");
* IndexSequence orVals = new IndexSequence();
* IndexSequence seq = this[FIELD_NAME_CHAR + field.ToLower()];
* foreach (var match in _matches)
* {
* IndexSequence newseq = SearchWord(match.ToString().ToLower());
* newseq.R = -1;
* newseq *= seq;
* orVals += newseq;
* }
*
* return (orVals);
*/
}
public IndexSequence(IndexSequence seq)
{
self = new List <ushort>(seq.self);
}
public SeqEnumerator(IndexSequence seq)
{
_seq = seq;
Reset();
}
protected IndexSequence SearchWord(string word)
{
// if (word.Length < MIN_WORD_LENGTH) return (new IndexSequence(/* Empty */));
string stemmed = word;
bool bExact = false;
if ((word.ToUpper().Equals(word)) && (bKeepForms))
{
bExact = true;
}
word = word.ToLower();
IndexSequence total = null;
string[] words = { word };
if (word.IndexOf('_') >= 0)
{
if (bKeepForms)
{
bExact = true;
words = GetLikeWords(word);
}
else
{
return(new IndexSequence());
}
}
foreach (string wword in words)
{
try
{
IndexSequence res = new IndexSequence();
var codes = GetWordCodes(wword).Select((c) => c.code);
if (codes.Count() > 0)
{
var selfcodes = codes.Where((s) => Regex.IsMatch(s.Substring(0, 1), @"\w"));
var knowcodes = codes.Except(selfcodes);
// search for know or exact words if any
foreach (string code in (!bExact ? (knowcodes.Count() > 0 ? knowcodes : selfcodes.Take(1)) : selfcodes.Take(1)))
{
if (self.Keys.Contains(code))
{
res = this[code];
if (total == null)
{
total = res;
}
else
{
total += res;
}
}
}
}
}
catch (Exception e)
{
Console.WriteLine("Error search word: " + e.Message);
}
}
if (total == null)
{
total = new IndexSequence();
}
if (bExact)
{
total.R = -1;
}
return(total);
}