@Override
protected Collection<Node> getInputs(final Node node) {
List<Arc> arcs = graph.getInputArcs(node);
List<Node> inputs = new ArrayList<Node>(arcs.size());
for (Arc arc : arcs) {
inputs.add(arc.getStartNode());
}
return inputs;
}
@Override
protected boolean hasNoInputs(final Node node) {
return graph.getInputArcs(node).isEmpty();
}