private RDFRectangle toRectangle(StatementPattern pattern, BindingSet bindings) {
Value sVal = pattern.getSubjectVar().getValue();
Value pVal = pattern.getPredicateVar().getValue();
Value oVal = pattern.getObjectVar().getValue();
RDFURIRange subjectRange;
List<String> list = new ArrayList<String>();
if (sVal == null) {
if (bindings.hasBinding(pattern.getSubjectVar().getName()))
list.add(bindings.getValue(pattern.getSubjectVar().getName()).stringValue());
} else list.add(sVal.stringValue());
if (!list.isEmpty()) subjectRange = new RDFURIRange(list);
else subjectRange = new RDFURIRange();
ExplicitSetRange<URI> predicateRange;
Set<URI> set = new HashSet<URI>();
if (pVal == null) {
if (bindings.hasBinding(pattern.getPredicateVar().getName()))
set.add((URI) bindings.getValue(pattern.getPredicateVar().getName()));
} else set.add((URI) pVal);
if (!set.isEmpty()) predicateRange = new ExplicitSetRange<URI>(set);
else predicateRange = new ExplicitSetRange<>();
RDFValueRange objectRange = new RDFValueRange();
if (oVal == null) {
if (bindings.hasBinding(pattern.getObjectVar().getName()))
objectRange = fillObjectRange(bindings.getValue(pattern.getObjectVar().getName()));
} else objectRange = fillObjectRange(oVal);
return new RDFRectangle(subjectRange, predicateRange, objectRange);
}
