public Task <TopDocs> SearchAsync(LuceneQueryContext context, JObject queryObj)
{
var queryProp = queryObj["query"] as JObject;
if (queryProp == null)
{
throw new ArgumentException("Query DSL requires a [query] property");
}
var query = CreateQueryFragment(context, queryProp);
var sortProperty = queryObj["sort"];
var fromProperty = queryObj["from"];
var sizeProperty = queryObj["size"];
var size = sizeProperty?.Value <int>() ?? 50;
var from = fromProperty?.Value <int>() ?? 0;
string sortField = null;
string sortOrder = null;
if (sortProperty != null)
{
if (sortProperty.Type == JTokenType.String)
{
sortField = sortProperty.ToString();
}
else if (sortProperty.Type == JTokenType.Object)
{
sortField = ((JProperty)sortProperty.First).Name;
sortOrder = ((JProperty)sortProperty.First).Value["order"].ToString();
}
}
TopDocs docs = context.IndexSearcher.Search(
query,
size + from,
sortField == null ? Sort.RELEVANCE : new Sort(new SortField(sortField, SortFieldType.STRING, sortOrder == "desc"))
);
if (from > 0)
{
docs = new TopDocs(docs.TotalHits - from, docs.ScoreDocs.Skip(from).ToArray(), docs.MaxScore);
}
return(Task.FromResult(docs));
}
public Query CreateQueryFragment(LuceneQueryContext context, JObject queryObj)
{
var first = queryObj.Properties().First();
Query query = null;
foreach (var queryProvider in _queryProviders)
{
query = queryProvider.CreateQuery(this, context, first.Name, (JObject)first.Value);
if (query != null)
{
break;
}
}
return(query);
}
