public IEnumerable <IDictionary <string, object> > Search(string indexName,
string term,
string outFieldNames = null,
int size = 20,
string sortFieldName = null,
bool sortReverse = false,
ISpatialFilter spatialFilter = null)
{
var searcher = _resources.GetIndexSearcher(indexName);
var mapping = _resources.GetMapping(indexName);
Query query = null;
Filter filter = null;
if (String.IsNullOrEmpty(term))
{
query = new MatchAllDocsQuery();
}
else
{
// https://lucene.apache.org/core/2_9_4/queryparsersyntax.html
//var parser = new QueryParser(AppLuceneVersion, mapping.PrimaryField, _resources.GetAnalyzer(indexName));
var parser = new MultiFieldQueryParser(
AppLuceneVersion,
mapping.PrimaryFields.ToArray(),
_resources.GetAnalyzer(indexName));
query = parser.Parse(term);
}
// Spatial Filter
if (spatialFilter != null)
{
InitSpatial();
filter = spatialFilter.ToFilter(_spatialContext, _tree);
}
ScoreDoc[] hits = null;
FieldMapping sortField = String.IsNullOrEmpty(sortFieldName) ?
null :
mapping.GetField(sortFieldName);
if (sortField != null)
{
Sort sort = new Sort(new SortField(sortFieldName, sortField.GetSortFieldType(), sortReverse));
hits = searcher.Search(query, filter, size, sort).ScoreDocs;
}
else
{
hits = searcher.Search(query, filter, size).ScoreDocs;
}
var outFields = new QueryOutFields(outFieldNames);
var selectOutFields = outFields.SelectOutFields(mapping);
List <IDictionary <string, object> > docs = new List <IDictionary <string, object> >();
if (hits != null && hits.Length > 0)
{
foreach (var hit in hits)
{
var foundDoc = searcher.Doc(hit.Doc);
if (foundDoc != null)
{
var doc = new Dictionary <string, object>();
//doc.Add("_id", hit.Doc);
if (!float.IsNaN(hit.Score))
{
doc.Add("_score", hit.Score);
}
foreach (var selectOutField in selectOutFields)
{
var field = mapping.GetField(selectOutField.Name);
if (field == null)
{
continue;
}
object val = field.GetValue(foundDoc);
var fieldName = field.Name;
val = selectOutField.Invoke(val, ref fieldName);
doc.Add(fieldName, val);
}
docs.Add(doc);
}
}
}
return(docs);
}
