public override Weight CreateWeight(IndexSearcher searcher)
{
Weight baseWeight = baseQuery.CreateWeight(searcher);
object[] drillDowns = new object[drillDownQueries.Length];
for (int dim = 0; dim < drillDownQueries.Length; dim++)
{
Query query = drillDownQueries[dim];
Filter filter = DrillDownQuery.GetFilter(query);
if (filter != null)
{
drillDowns[dim] = filter;
}
else
{
// TODO: would be nice if we could say "we will do no
// scoring" here....
drillDowns[dim] = searcher.Rewrite(query).CreateWeight(searcher);
}
}
return(new WeightAnonymousInnerClassHelper(this, baseWeight, drillDowns));
}
public override Weight CreateWeight(IndexSearcher searcher)
{
Weight baseWeight = baseQuery.CreateWeight(searcher);
object[] drillDowns = new object[drillDownQueries.Length];
for (int dim = 0; dim < drillDownQueries.Length; dim++)
{
Query query = drillDownQueries[dim];
Filter filter = DrillDownQuery.GetFilter(query);
if (filter != null)
{
drillDowns[dim] = filter;
}
else
{
// TODO: would be nice if we could say "we will do no
// scoring" here....
drillDowns[dim] = searcher.Rewrite(query).CreateWeight(searcher);
}
}
return new WeightAnonymousInnerClassHelper(this, baseWeight, drillDowns);
}
} // constructor
/// <summary>
/// Searches the keyword index using the keywordQuery.
///
/// See http://www.dotlucene.net/documentation/QuerySyntax.html for the format of the keywordQuery.
///
/// This function will return a fully-filled array of IndexableFileInfo objects.
/// </summary>
/// <param name="keywordQuery"></param>
/// <param name="queryForHighlighter"></param>
/// <returns></returns>
public IndexableFileInfo[] doSearch(string keywordQuery, string queryForHighlighter)
{
IndexSearcher searcher;
IndexReader indexReader;
try
{
FSDirectory indexDir = FSDirectory.GetDirectory(this.luceneIndexDir, false);
indexReader = IndexReader.Open(indexDir);
searcher = new IndexSearcher(indexReader);
}
catch
{
// if the luceneIndexDir does not contain index files (yet), IndexSearcher
// throws a nice Exception.
return(new IndexableFileInfo[0]);
}
List <IndexableFileInfo> arrayList = new List <IndexableFileInfo>();
try
{
string Query = keywordQuery;
if (Query == String.Empty)
{
return(new IndexableFileInfo[0]);
}
string HighlighterQuery = queryForHighlighter;
// -- weirdly enough, when the query is empty, an exception is thrown during the QueryParser.Parse
// this hack gets around that.
if (HighlighterQuery == String.Empty)
{
HighlighterQuery = Guid.NewGuid().ToString();
}
// parse the query, "text" is the default field to search
// note: use the StandardAnalyzer! (the SimpleAnalyzer doesn't work correctly when searching by fields that are integers!)
// MultiFieldQueryParser queryParser = new MultiFieldQueryParser(new string[] { "title", "contents" }, new hatWebPortalAnalyzer());
MultiFieldQueryParser queryParser = new MultiFieldQueryParser(new string[] { "title", "contents" }, new SimpleAnalyzer());
queryParser.SetDefaultOperator(QueryParser.AND_OPERATOR);
Query query = queryParser.Parse(Query);
QueryParser highlightQueryParser = new QueryParser("contents", new hatWebPortalAnalyzer());
Query highlighterQuery = highlightQueryParser.Parse(HighlighterQuery);
query = searcher.Rewrite(query); // is this needed?? " Expert: called to re-write queries into primitive queries."
// search
Hits hits = searcher.Search(query, Sort.RELEVANCE);
// create highlighter
Highlighter highlighter = new Highlighter(new SimpleHTMLFormatter("<strong>", "</strong>"), new QueryScorer(highlighterQuery));
// -- go through hits and return results
for (int i = 0; i < hits.Length(); i++)
{
Document d = hits.Doc(i);
string filename = d.Get("filename");
string plainText = d.Get("contents");
string title = d.Get("title");
string sectionName = d.Get("SectionName");
string filenameParams = d.Get("filenameParams");
bool contentIsPageSummary = Convert.ToBoolean(d.Get("contentIsPageSummary"));
double score = Convert.ToDouble(hits.Score(i));
DateTime lastModified = DateTools.StringToDate(d.Get("LastModified"));
TokenStream tokenStream = new hatWebPortalAnalyzer().TokenStream("contents", new StringReader(plainText));
string fragment = plainText;
if (!contentIsPageSummary)
{
fragment = highlighter.GetBestFragments(tokenStream, plainText, 2, "...");
}
IndexableFileInfo newHit = new IndexableFileInfo(filename, filenameParams, title, fragment, sectionName, lastModified, contentIsPageSummary, score);
arrayList.Add(newHit);
} // for
}
finally
{
searcher.Close();
indexReader.Close();
}
return(arrayList.ToArray());
} // SearchActiveDocument