LinkedDataCache cache = new LinkedDataCache(sail);
// Add URI dereferencers.
HTTPURIDereferencer hdref = new HTTPURIDereferencer(cache);
for (String x : NON_RDF_EXTENSIONS) {
hdref.blackListExtension(x);
}
cache.addDereferencer("http", hdref);
cache.addDereferencer("file", new FileURIDereferencer());
cache.addDereferencer("jar", new JarURIDereferencer());