/**
* Waits for and returns the results of the child tasks.
*
* @return A list of results returned from the child tasks
*/
public final List<T> getChildrenResults() {
if (children == null) return Collections.emptyList();
final List<T> results = new ArrayList<T>(children.size());
for (final AbstractForkJoinWorker<T> worker : children) {
results.add(worker.join());
}
return results;
}
/**
* Forks a child task. Makes sure it has a means to indicate back completion. The worker is stored
* in the internal list of workers for evidence and easy result retrieval through
* getChildrenResults().
*
* @param child The child task
*/
protected final void forkOffChild(final AbstractForkJoinWorker<T> child) {
if (children == null) children = new ArrayList<AbstractForkJoinWorker<T>>();
children.add(child);
child.fork();
}