I have a problem to get a Query with a Join working.
Query query = new Query("GEO_PARCEL");
Join join = new Join("ADMIN_PARCEL", CQL.toFilter("a.ID = b.GEO_ID"));
featureCollection = featureSource.getFeatures(query);
The error says that property a/ID does not exist. The . is substituted by a / for some reason.