private static List<Double> getWeightVectorForClass(
Map<String, List<LinkedHashMap<String, Object>>> documents,
String key,
List<Integer> featureIndexList,
GraphDatabaseService db) {
List<Double> weightVector;
Transaction tx = db.beginTx();
// Get class id
Long classId =
db.findNodesByLabelAndProperty(DynamicLabel.label("Class"), "name", key)
.iterator()
.next()
.getId();
// Get weight vector for class
List<Long> longs =
documents
.get(key)
.stream()
.map(a -> ((Integer) a.get("feature")).longValue())
.collect(Collectors.toList());
weightVector =
featureIndexList
.stream()
.map(i -> longs.contains(i.longValue()) ? tfidf(db, i.longValue(), classId) : 0.0)
.collect(Collectors.toList());
tx.success();
tx.close();
return weightVector;
}
private static List<Double> getFeatureVector(
GraphDatabaseService db,
GraphManager graphManager,
String input,
List<Integer> featureIndexList) {
List<LinkedHashMap<String, Object>> featureFrequencyMap =
getFeatureFrequencyMap(db, input, graphManager);
List<Integer> longs =
featureFrequencyMap
.stream()
.map(a -> (Integer) a.get("feature"))
.collect(Collectors.toList());
// ((Integer) featureFrequencyMap.stream()
// .filter(a -> (a.get("feature")).equals(i))
// .collect(Collectors.toList()).get(0).get("frequency")).doubleValue()
return featureIndexList
.stream()
.map(i -> longs.contains(i) ? 1.0 : 0.0)
.collect(Collectors.toList());
}