private void splitJourneyLocation(
ConcurrentMap<String, IRI> variableTypes,
List<LDObject> journeyLocation,
List<LDObject> journeyDatas,
BindingSet bindings) {
LDObject locationsData = new LDObject();
LDObject journeyData = new LDObject();
bindings
.getBindingNames()
.stream()
.forEach(
bindingName -> {
org.openrdf.model.Value value = bindings.getBinding(bindingName).getValue();
QueryResultsParser.updateVariableTypes(variableTypes, bindingName, value);
if (Arrays.asList("id", "creationDate", "name", "status").contains(bindingName)) {
journeyData.addKeyValue(new KeyValue(bindingName, value.stringValue()));
} else {
locationsData.addKeyValue(new KeyValue(bindingName, value.stringValue()));
}
if ("locationId".equalsIgnoreCase(bindingName)) {
journeyData.addKeyValue(new KeyValue(bindingName, value.stringValue()));
}
});
journeyLocation.add(locationsData);
journeyDatas.add(journeyData);
}
@Override
protected BindingSet getNextElement() throws QueryEvaluationException {
if (hashTable == null) {
setupHashTable();
}
while (currentScanElem == null) {
if (scanList.size() > 0) {
currentScanElem = scanList.remove(0);
} else {
if (restIter.hasNext()) {
currentScanElem = restIter.next();
} else {
// no more elements available
return null;
}
}
if (currentScanElem instanceof EmptyBindingSet) {
// the empty bindingset should be merged with all bindingset in
// the hash table
hashTableValues = new ArrayList<BindingSet>();
for (BindingSet key : hashTable.keySet()) {
hashTableValues.addAll(hashTable.get(key));
}
} else {
BindingSet key = calcKey(currentScanElem, joinAttributes);
if (hashTable.containsKey(key)) {
hashTableValues = new ArrayList<BindingSet>(hashTable.get(key));
} else {
currentScanElem = null;
hashTableValues = null;
}
}
}
BindingSet nextHashTableValue = hashTableValues.remove(0);
QueryBindingSet result = new QueryBindingSet(currentScanElem);
for (String name : nextHashTableValue.getBindingNames()) {
Binding b = nextHashTableValue.getBinding(name);
if (!result.hasBinding(name)) {
result.addBinding(b);
}
}
if (hashTableValues.size() == 0) {
// we've exhausted the current scanlist entry
currentScanElem = null;
hashTableValues = null;
}
return result;
}
private BindingSet calcKey(BindingSet bindings, Set<String> commonVars) {
QueryBindingSet q = new QueryBindingSet();
for (String varName : commonVars) {
Binding b = bindings.getBinding(varName);
if (b != null) {
q.addBinding(b);
}
}
return q;
}
