private static boolean isMagicProperty(PropertyFunctionRegistry registry, Triple pfTriple) {
if (!pfTriple.getPredicate().isURI()) return false;
if (registry.manages(pfTriple.getPredicate().getURI())) return true;
return false;
}
private Triple resolveTriple(final Triple t, final Binding values) {
int idx = variables.indexOf(t.getSubject());
final Node s = idx == -1 ? t.getSubject() : values.get(Var.alloc(variables.get(idx)));
idx = variables.indexOf(t.getPredicate());
final Node p = idx == -1 ? t.getPredicate() : values.get(Var.alloc(variables.get(idx)));
idx = variables.indexOf(t.getObject());
final Node o = idx == -1 ? t.getObject() : values.get(Var.alloc(variables.get(idx)));
return new Triple(s, p, o);
}
protected void formatTriple(Triple tp) {
out.print(slotToString(tp.getSubject()));
out.print(" ");
out.print(slotToString(tp.getPredicate()));
out.print(" ");
out.print(slotToString(tp.getObject()));
}
// Remove all triples associated with this magic property.
// Make an instance record.
private static PropertyFunctionInstance magicProperty(
Context context, Triple pfTriple, BasicPattern triples) {
List<Triple> listTriples = new ArrayList<>();
GNode sGNode = new GNode(triples, pfTriple.getSubject());
GNode oGNode = new GNode(triples, pfTriple.getObject());
List<Node> sList = null;
List<Node> oList = null;
if (GraphList.isListNode(sGNode)) {
sList = GraphList.members(sGNode);
GraphList.allTriples(sGNode, listTriples);
}
if (GraphList.isListNode(oGNode)) {
oList = GraphList.members(oGNode);
GraphList.allTriples(oGNode, listTriples);
}
PropFuncArg subjArgs = new PropFuncArg(sList, pfTriple.getSubject());
PropFuncArg objArgs = new PropFuncArg(oList, pfTriple.getObject());
// Confuses single arg with a list of one.
PropertyFunctionInstance pfi =
new PropertyFunctionInstance(subjArgs, pfTriple.getPredicate(), objArgs);
triples.getList().removeAll(listTriples);
return pfi;
}
private static Op makeStages(
BasicPattern triples, Map<Triple, PropertyFunctionInstance> pfInvocations) {
// Step 3 : Make the operation expression.
// For each property function, insert the implementation
// For each block of non-property function triples, make a BGP.
Op op = null;
BasicPattern pattern = null;
for (Triple t : triples) {
if (pfInvocations.containsKey(t)) {
op = flush(pattern, op);
pattern = null;
PropertyFunctionInstance pfi = pfInvocations.get(t);
OpPropFunc opPF =
new OpPropFunc(t.getPredicate(), pfi.getSubjectArgList(), pfi.getObjectArgList(), op);
op = opPF;
continue;
}
// Regular triples - make sure there is a basic pattern in progress.
if (pattern == null) pattern = new BasicPattern();
pattern.add(t);
}
op = flush(pattern, op);
return op;
}
@Override
public void triple(Triple triple) {
// Find nodes.
// log.info("Triple: "+triple) ;
processNode(triple.getSubject());
processNode(triple.getPredicate());
processNode(triple.getObject());
triples.add(triple);
if (triples.size() >= batchSize) processBatch();
}
public static int calcWidthTriples(
PrefixMap prefixMap, String baseURI, Collection<Triple> triples, int minWidth, int maxWidth) {
Node prev = null;
int nodeMaxWidth = minWidth;
for (Triple triple : triples) {
Node n = triple.getPredicate();
if (prev != null && prev.equals(n)) continue;
int len = calcWidth(prefixMap, baseURI, n);
if (len > maxWidth) continue;
if (nodeMaxWidth < len) nodeMaxWidth = len;
prev = n;
}
return nodeMaxWidth;
}
private static void convert(
List<Triple> triples, List<Tuple<NodeId>> tuples, NodeTable nodeTable) {
// Slightly faster. But larger batches?
for (Triple t : triples) {
NodeId nid_s = nodeTable.getAllocateNodeId(t.getSubject());
NodeId nid_p = nodeTable.getAllocateNodeId(t.getPredicate());
NodeId nid_o = nodeTable.getAllocateNodeId(t.getObject());
Tuple<NodeId> x = Tuple.createTuple(nid_s, nid_p, nid_o);
tuples.add(x);
}
// triples.stream().map(t->
// Tuple.createTuple
// (nodeTable.getAllocateNodeId(t.getSubject()),
// nodeTable.getAllocateNodeId(t.getPredicate()),
// nodeTable.getAllocateNodeId(t.getObject())))
// .collect(Collectors.toCollection(()->tuples)) ;
}
/**
* Register all the variables in the triple.
*
* @param t the triple to register.
* @param variables The list of variables.
* @return t for chaining
*/
private Triple registerBGPTriple(final Triple t, final List<Node> variables) {
registerVariables(t.getSubject(), variables);
registerVariables(t.getPredicate(), variables);
registerVariables(t.getObject(), variables);
return t;
}