// поиск с указанием найденной позиции в тексте
public void DoSearch(String db, String querystr, global::Lucene.Net.Store.Directory indexDirectory)
{
// 1. Specify the analyzer for tokenizing text.
// The same analyzer should be used as was used for indexing
StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_30, ListStopWords);
// 2. query
Query q = new QueryParser(Version.LUCENE_30, "LineText", analyzer).Parse(querystr);
// 3. search
int hitsPerPage = 10;
IndexSearcher searcher = new IndexSearcher(indexDirectory, true);
IndexReader reader = IndexReader.Open(indexDirectory, true);
searcher.SetDefaultFieldSortScoring(true, false);
TopScoreDocCollector collector = TopScoreDocCollector.Create(hitsPerPage, true);
searcher.Search(q, collector);
ScoreDoc[] hits = collector.TopDocs().ScoreDocs;
// 4. display term positions, and term indexes
MessageBox.Show("Found " + hits.Length + " hits.");
for (int i = 0; i < hits.Length; ++i)
{
int docId = hits[i].Doc;
ITermFreqVector tfvector = reader.GetTermFreqVector(docId, "LineText");
TermPositionVector tpvector = (TermPositionVector)tfvector;
// this part works only if there is one term in the query string,
// otherwise you will have to iterate this section over the query terms.
int termidx = tfvector.IndexOf(querystr);
int[] termposx = tpvector.GetTermPositions(termidx);
TermVectorOffsetInfo[] tvoffsetinfo = tpvector.GetOffsets(termidx);
for (int j = 0; j < termposx.Length; j++)
{
MessageBox.Show("termpos : " + termposx[j]);
}
for (int j = 0; j < tvoffsetinfo.Length; j++)
{
int offsetStart = tvoffsetinfo[j].StartOffset;
int offsetEnd = tvoffsetinfo[j].EndOffset;
MessageBox.Show("offsets : " + offsetStart + " " + offsetEnd);
}
// print some info about where the hit was found...
Document d = searcher.Doc(docId);
MessageBox.Show((i + 1) + ". " + d.Get("path"));
}
// searcher can only be closed when there
// is no need to access the documents any more.
searcher.Dispose();
}
public IEnumerable <SampleDataFileRow> _search(string searchTerm, int precision, global::Lucene.Net.Store.Directory indexDirectory)
{
Debug.Assert(!String.IsNullOrEmpty(searchTerm));
List <SampleDataFileRow> results = new List <SampleDataFileRow>();
if (String.IsNullOrEmpty(searchTerm))
{
return(results);
}
using (IndexSearcher searcher = new IndexSearcher(indexDirectory))
{
var analyzer = new StandardAnalyzer(Version.LUCENE_30, ListStopWords);
QueryParser parser = new QueryParser(Version.LUCENE_30, "LineText", analyzer);
if (precision > 0 && precision < 100)
{
parser.FuzzyMinSim = ((float)precision) * 0.01f;
}
else if (precision == 100)
{
parser.FuzzyMinSim = 0.99f;
}
else
{
parser.FuzzyMinSim = 0.8f;
}
//parser.PhraseSlop = 5;
var query = ParseQuery(searchTerm, parser);
//var query = fparseQuery(searchTerm);
ScoreDoc[] hitsFound = searcher.Search(query, null, CountSearchResults).ScoreDocs;
foreach (var t in hitsFound)
{
var sampleDataFileRow = new SampleDataFileRow();
int docId = t.Doc;
float score = t.Score;
Explanation explanation = searcher.Explain(query, t.Doc);
Document doc = searcher.Doc(docId);
sampleDataFileRow.LineNumber = int.Parse(doc.Get("LineNumber"));
sampleDataFileRow.LineText = doc.Get("LineText");
sampleDataFileRow.Score = score;
_explanationResult = explanation.ToString();
results.Add(sampleDataFileRow);
}
analyzer.Close();
searcher.Dispose();
}
return(results.OrderByDescending(x => x.Score).ToList());
}
