// inherit javadoc
public override TopDocs Search(Weight weight, Filter filter, int nDocs)
{
if (nDocs <= 0)
{
// null might be returned from hq.top() below.
throw new System.ArgumentException("nDocs must be > 0");
}
TopDocCollector collector = new TopDocCollector(nDocs);
Search(weight, filter, collector);
return(collector.TopDocs());
}
// inherit javadoc
public override TopDocs Search(Weight weight, Filter filter, int nDocs)
{
if (nDocs <= 0)
// null might be returned from hq.top() below.
throw new System.ArgumentException("nDocs must be > 0");
TopDocCollector collector = new TopDocCollector(nDocs);
Search(weight, filter, collector);
return collector.TopDocs();
}
public IEnumerable<Content> Search(string keyword, int page, int pageSize, out int totals)
{
lock (locker)
{
List<Content> result = new List<Content>();
IndexReader reader = IndexReader.Open(DBNLConfigurationManager.LuceneElement.IndexingFolder);
IndexSearcher searcher = new IndexSearcher(reader);
TopDocCollector collector = new TopDocCollector((page + 1) * pageSize);
PhraseQuery pquery = new PhraseQuery();
BooleanQuery myquery = new BooleanQuery();
PhraseQuery q2 = new PhraseQuery();
//grab the search terms from the query string
string[] str = keyword.Split(' ');
//build the query
foreach (string word in str)
{
//brand is the field I'm searching in
q2.Add(new Term("content", word.ToLower()));
}
//finally, add it to the BooleanQuery object
myquery.Add(q2, BooleanClause.Occur.MUST);
//foreach (string srt in keyword.Split(new char[] {' '}))
//{
// pquery.Add(new Term("content", srt.ToLower()));
//}
//pquery.Add(q2, BooleanClause.Occur.MUST);
TermQuery query = new TermQuery(new Term("content", keyword));
// TopDocs topDocs = searcher.Search(query, collector);
//searcher.Search(query, collector);
QueryParser qp = new QueryParser("content", new StandardAnalyzer());
//Contains a phrase such as "this is a phrase"
Query q = qp.Parse(keyword);
//Hits hits = searcher.Search(q);
//Hits hits = searcher.Search(query);
Hits hits = searcher.Search(myquery);
//ScoreDoc[] hits = collector.TopDocs().scoreDocs;
totals = hits.Length();
Lucene.Net.Highlight.Formatter formatter = new Lucene.Net.Highlight.SimpleHTMLFormatter(
"<span class=\"Highlight\">",
"</span>");
Lucene.Net.Highlight.SimpleFragmenter fragmenter = new Lucene.Net.Highlight.SimpleFragmenter(400);
Lucene.Net.Highlight.QueryScorer scorer = new Lucene.Net.Highlight.QueryScorer(myquery);
Lucene.Net.Highlight.Highlighter highlighter = new Lucene.Net.Highlight.Highlighter(formatter, scorer);
highlighter.SetTextFragmenter(fragmenter);
for (int i = (page - 1) * pageSize; i < Math.Min(page * pageSize, hits.Length()); i++)
{
Document doc = hits.Doc(i);
string raw_text = doc.Get("content");
Lucene.Net.Analysis.TokenStream stream = analyzer.TokenStream("", new System.IO.StringReader(raw_text));
string highlighted_text = highlighter.GetBestFragments(stream, raw_text, 1, "...").Replace("'", "''");
if (highlighted_text == "") // someties the highlighter fails to emit text...
{
highlighted_text = raw_text.Replace("'", "''");
}
if (highlighted_text.Length > 500)
{
highlighted_text = highlighted_text.Substring(0, 500);
}
Content content = new ContentService().GetItem(int.Parse(doc.Get("id")));
content.HighlightText = highlighted_text;
result.Add(content);
}
reader.Close();
searcher.Close();
return result.AsEnumerable();
}
}
////string[] querys = { "dominos pizza" };
//string[] fields = { "title" };
//Lucene.Net.Search.BooleanClause.Occur[] clauses = { Lucene.Net.Search.BooleanClause.Occur.MUST };
//string[] sortby = { "id" };
//XmlDocument xDoc = GetSearchResult(@"C:\luceneindexpath\", querys, fields, clauses, sortby);
//return xDoc;
public static XmlDocument GetSearchResult(string Indexpath, string[] querys, string[] fields, BooleanClause.Occur[] clauses, string[] sortingfields)
{
//XMLDocument is created to return output records
XmlDocument xResDoc = new XmlDocument();
xResDoc.LoadXml("<SEARCHRESULTS></SEARCHRESULTS>");
try
{
// This block will parse the given queries
// (i.e) would remove characters other than a-z and 0-9
for (int i = 0; i < querys.Length; i++)
{
querys[i] = querys[i].ToLower();
querys[i] = System.Text.RegularExpressions.Regex.Replace(querys[i], "[^a-z0-9]", " ");
while (querys[i].Contains(" "))
querys[i] = querys[i].Replace(" ", " ");
}
//
if (System.IO.Directory.Exists(Indexpath))
{
// Open's Already created Lucene Index for searching
Lucene.Net.Index.IndexReader idxReader = Lucene.Net.Index.IndexReader.Open(Indexpath);
Searcher searcher = new IndexSearcher(idxReader);
//Creates a Lucene Query with given search inputs
Query qry = MultiFieldQueryParser.Parse(querys, fields, clauses, new StandardAnalyzer());
ScoreDoc[] hits;
//Assigns No. of Records to be fetched
//here idxReader max records is used
//can be changed to get specific top records
int top = idxReader.MaxDoc();
//To get output with specific sort
if (sortingfields.Length > 0)
{
TopFieldDocCollector collector = new TopFieldDocCollector(idxReader, new Sort(sortingfields), top);
searcher.Search(qry, collector);
hits = collector.TopDocs().scoreDocs;
}
else //To get output without specific sort
{
TopDocCollector collector = new TopDocCollector(top);
searcher.Search(qry, collector);
hits = collector.TopDocs().scoreDocs;
}
//Loops through the output records and creates an XMLElement for XML Output
for (int i = 0; i < hits.Length; i++)
{
int docId = hits[i].doc;
Document doc = searcher.Doc(docId);
XmlElement xEle = xResDoc.CreateElement("SEARCHRESULT");
foreach (Field fl in doc.Fields())
{
xEle.SetAttribute(fl.Name(), doc.Get(fl.Name()));
}
xResDoc.DocumentElement.AppendChild(xEle);
}
searcher.Close();
idxReader.Close();
}
}
catch (Exception ex)
{
//Print Error Message
}
return xResDoc;
}
protected override IEnumerable<LucObject> DoExecute(Query query, bool allVersions, IndexReader idxReader, out int totalCount)
{
Searcher searcher = null;
BeginFullExecutingTime();
try
{
IEnumerable<LucObject> result;
searcher = new IndexSearcher(idxReader);
TopDocs topDocs;
ScoreDoc[] hits;
var top = 100000; // 501; //idxReader.MaxDoc();
if (this.LucQuery.SortFields.Length > 0)
{
BeginKernelTime();
TopFieldDocCollector collector = new TopFieldDocCollector(idxReader, new Sort(this.LucQuery.SortFields), top);
searcher.Search(query, collector);
FinishKernelTime();
BeginCollectingTime();
topDocs = collector.TopDocs();
totalCount = topDocs.TotalHits;
hits = topDocs.ScoreDocs;
FinishCollectingTime();
}
else
{
BeginKernelTime();
TopDocCollector collector = new TopDocCollector(top);
searcher.Search(query, collector);
FinishKernelTime();
BeginCollectingTime();
topDocs = collector.TopDocs();
totalCount = topDocs.TotalHits;
hits = topDocs.ScoreDocs;
FinishCollectingTime();
}
BeginPagingTime();
result = GetResultPage(hits, searcher, allVersions);
FinishPagingTime();
return result;
}
catch
{
FinishKernelTime();
FinishCollectingTime();
FinishPagingTime();
throw;
}
finally
{
FinishFullExecutingTime();
if (searcher != null)
{
searcher.Close();
searcher = null;
}
}
}
