private QueryIterator variableSubject(
Binding binding, Node s, Node score, Node literal, StrMatch match, ExecutionContext execCxt) {
ListMultimap<String, TextHit> results =
query(match.getProperty(), match.getQueryString(), match.getLimit(), execCxt);
Collection<TextHit> r = results.values();
return resultsToQueryIterator(binding, s, score, literal, r, execCxt);
}
private ListMultimap<String, TextHit> query(
Node property, String queryString, int limit, ExecutionContext execCxt) {
// use the graph information in the text index if possible
if (textIndex.getDocDef().getGraphField() != null
&& execCxt.getActiveGraph() instanceof GraphView) {
GraphView activeGraph = (GraphView) execCxt.getActiveGraph();
if (!Quad.isUnionGraph(activeGraph.getGraphName())) {
String uri =
activeGraph.getGraphName() != null
? TextQueryFuncs.graphNodeToString(activeGraph.getGraphName())
: Quad.defaultGraphNodeGenerated.getURI();
String escaped = QueryParserBase.escape(uri);
String qs2 = textIndex.getDocDef().getGraphField() + ":" + escaped;
queryString = "(" + queryString + ") AND " + qs2;
}
}
// for language-based search extension
if (textIndex.getDocDef().getLangField() != null) {
String field = textIndex.getDocDef().getLangField();
if (langArg != null) {
String qs2 = !"none".equals(langArg) ? field + ":" + langArg : "-" + field + ":*";
queryString = "(" + queryString + ") AND " + qs2;
}
}
Explain.explain(execCxt.getContext(), "Text query: " + queryString);
if (log.isDebugEnabled()) log.debug("Text query: {} ({})", queryString, limit);
String cacheKey = limit + " " + property + " " + queryString;
Cache<String, ListMultimap<String, TextHit>> queryCache =
(Cache<String, ListMultimap<String, TextHit>>) execCxt.getContext().get(cacheSymbol);
if (queryCache == null) {
/* doesn't yet exist, need to create it */
queryCache = CacheFactory.createCache(CACHE_SIZE);
execCxt.getContext().put(cacheSymbol, queryCache);
}
final String queryStr = queryString; // final needed for the lambda function
ListMultimap<String, TextHit> results =
queryCache.getOrFill(
cacheKey,
() -> {
List<TextHit> resultList = textIndex.query(property, queryStr, limit);
ListMultimap<String, TextHit> resultMultimap = LinkedListMultimap.create();
for (TextHit result : resultList) {
resultMultimap.put(result.getNode().getURI(), result);
}
return resultMultimap;
});
return results;
}
private QueryIterator concreteSubject(
Binding binding, Node s, Node score, Node literal, StrMatch match, ExecutionContext execCxt) {
if (!s.isURI()) {
log.warn("Subject not a URI: " + s);
return IterLib.noResults(execCxt);
}
String qs = match.getQueryString();
ListMultimap<String, TextHit> x =
query(match.getProperty(), match.getQueryString(), -1, execCxt);
if (x == null) // null return value - empty result
return IterLib.noResults(execCxt);
List<TextHit> r = x.get(s.getURI());
return resultsToQueryIterator(binding, s, score, literal, r, execCxt);
}