private static Query ParseQuery(SearchFilter searchFilter)
{
// 1. parse the query into field clauses and general terms
// We imagine that mostly, field clauses are meant to 'filter' results found searching for general terms.
// The resulting clause collections may be empty.
var queryParser = new NuGetQueryParser();
var clauses = queryParser.Parse(searchFilter.SearchTerm).Select(StandardizeSearchTerms).ToList();
var fieldSpecificTerms = clauses.Where(a => a.Field != null);
var generalTerms = clauses.Where(a => a.Field == null);
// Convert terms to appropriate Lucene Query objects
var analyzer = new PerFieldAnalyzer();
var fieldSpecificQueries = fieldSpecificTerms
.Select(c => AnalysisHelper.GetFieldQuery(analyzer, c.Field, c.TermOrPhrase))
.Where(q => !IsDegenerateQuery(q))
.ToList();
var generalQueries = generalTerms
.Select(c => AnalysisHelper.GetMultiFieldQuery(analyzer, Fields, c.TermOrPhrase))
.Where(q => !IsDegenerateQuery(q))
.ToList();
if (fieldSpecificQueries.Count == 0 &&
generalQueries.Count == 0)
{
return(new MatchAllDocsQuery());
}
// At this point we try to detect user intent...
// a) General search? [foo bar]
// b) Id-targeted search? [id:Foo bar]
// c) Other Field-targeted search? [author:Foo bar]
bool doExactId = !fieldSpecificQueries.Any();
Query generalQuery = BuildGeneralQuery(doExactId, searchFilter.SearchTerm, analyzer, generalTerms, generalQueries);
// IF field targeting is done, we should basically want to AND their field specific queries with all other query terms
if (fieldSpecificQueries.Any())
{
var combinedQuery = new BooleanQuery();
if (!IsDegenerateQuery(generalQuery))
{
combinedQuery.Add(generalQuery, Occur.MUST);
}
foreach (var fieldQuery in fieldSpecificQueries)
{
if (!IsDegenerateQuery(fieldQuery))
{
combinedQuery.Add(fieldQuery, Occur.MUST);
}
}
generalQuery = combinedQuery;
}
return(generalQuery);
}
private static Query ParseQuery(SearchFilter searchFilter)
{
// 1. parse the query into field clauses and general terms
// We imagine that mostly, field clauses are meant to 'filter' results found searching for general terms.
// The resulting clause collections may be empty.
var queryParser = new NuGetQueryParser();
var clauses = queryParser.Parse(searchFilter.SearchTerm).Select(StandardizeSearchTerms).ToList();
var fieldSpecificTerms = clauses.Where(a => a.Field != null);
var generalTerms = clauses.Where(a => a.Field == null);
// Convert terms to appropriate Lucene Query objects
var analyzer = new PerFieldAnalyzer();
var fieldSpecificQueries = fieldSpecificTerms
.Select(c => AnalysisHelper.GetFieldQuery(analyzer, c.Field, c.TermOrPhrase))
.Where(q => !IsDegenerateQuery(q))
.ToList();
var generalQueries = generalTerms
.Select(c => AnalysisHelper.GetMultiFieldQuery(analyzer, Fields, c.TermOrPhrase))
.Where(q => !IsDegenerateQuery(q))
.ToList();
if (fieldSpecificQueries.Count == 0 &&
generalQueries.Count == 0)
{
return new MatchAllDocsQuery();
}
// At this point we try to detect user intent...
// a) General search? [foo bar]
// b) Id-targeted search? [id:Foo bar]
// c) Other Field-targeted search? [author:Foo bar]
bool doExactId = !fieldSpecificQueries.Any();
Query generalQuery = BuildGeneralQuery(doExactId, searchFilter.SearchTerm, analyzer, generalTerms, generalQueries);
// IF field targeting is done, we should basically want to AND their field specific queries with all other query terms
if (fieldSpecificQueries.Any())
{
var combinedQuery = new BooleanQuery();
if (!IsDegenerateQuery(generalQuery))
{
combinedQuery.Add(generalQuery, Occur.MUST);
}
foreach (var fieldQuery in fieldSpecificQueries)
{
if (!IsDegenerateQuery(fieldQuery))
{
combinedQuery.Add(fieldQuery, Occur.MUST);
}
}
generalQuery = combinedQuery;
}
return generalQuery;
}
