public IList <LuceneSearchResult> Search(string term, int numResults, AdminUser user, string sortField, bool descending)
{
using (SearcherManager manager = new SearcherManager(RequestIndexWriterSingleton.Instance))
{
this.searcher = manager.Acquire().Searcher;
Query query = null;
if (string.IsNullOrEmpty(term))
{
query = new MatchAllDocsQuery();
}
else
{
QueryParser parser;
if (term.Trim().StartsWith("Id"))
{
// Single and ranged numeric value search on Id field
parser = new NumericQueryParser(Lucene.Net.Util.Version.LUCENE_30, "Id", new KeywordAnalyzer());
}
else
{
// General search across text fields
parser = new MultiFieldQueryParser(Lucene.Net.Util.Version.LUCENE_30,
new string[] { "ReferenceNumber", "RequestName", "RequestEntity", "RequestType", "CurrentStatus" },
new LowerCaseAnalyzer());
parser.DefaultOperator = QueryParser.Operator.AND;
if (!string.IsNullOrEmpty(term))
{
if (!term.Contains(':'))
{
// Edit user's search string and add wildcards.
term = string.Join(" ", term.Split(new string[] { " " }, System.StringSplitOptions.RemoveEmptyEntries)
.Select(x => "*" + x + "*")
.ToArray()
);
}
}
}
parser.AllowLeadingWildcard = true;
try
{
query = parser.Parse(term);
}
catch (ParseException e)
{
log.Error("Encountered problem parsing the search term: " + term, e);
return(new List <LuceneSearchResult>());
}
}
// when given a user, assumes results must be filtered
if (user != null && user.GetRequestEntity() != null)
{
BooleanQuery bq = new BooleanQuery();
bq.Add(query, Occur.MUST);
BooleanQuery bq2 = new BooleanQuery();
bq2.Add(new TermQuery(new Term("RequestEntity", user.GetRequestEntity().RequestEntityName)), Occur.SHOULD);
bq2.Add(new TermQuery(new Term("CreatorRequestEntity", user.GetRequestEntity().RequestEntityName)), Occur.SHOULD);
bq2.Add(new TermQuery(new Term("Creator", user.UserID)), Occur.SHOULD);
bq.Add(bq2, Occur.MUST);
query = bq;
}
log.Debug("Search query: " + query.ToString());
this.PerformSearch(query, numResults, sortField, descending);
return(TransformTopDocs());
}
}
