/*
* Recursive descent into subclusters.
*/
private static void flatten(ArrayList<Cluster> flattened, Collection<Cluster> clusters) {
for (Cluster c : clusters) {
flattened.add(c);
final List<Cluster> subclusters = c.getSubclusters();
if (!subclusters.isEmpty()) {
flatten(flattened, subclusters);
}
}
}
/**
* If there are unclustered documents, appends the "Other Topics" group to the <code>clusters
* </code>.
*
* @see #buildOtherTopics(List, List, String)
*/
public static void appendOtherTopics(
List<Document> allDocuments, List<Cluster> clusters, String label) {
final Cluster otherTopics = buildOtherTopics(allDocuments, clusters, label);
if (!otherTopics.getDocuments().isEmpty()) {
clusters.add(otherTopics);
}
}
/** For JSON serialization only. */
@JsonProperty("clusters")
@SuppressWarnings("unused")
private List<Cluster> getSubclustersForSerialization() {
return subclustersView.isEmpty() ? null : subclustersView;
}