private static void collectRootNodeSources(
Collection<PackagingNodeSource> nodeSources, Set<PackagingNodeSource> result) {
for (PackagingNodeSource nodeSource : nodeSources) {
final Collection<PackagingNodeSource> parentSources = nodeSource.getParentSources();
if (parentSources.isEmpty()) {
result.add(nodeSource);
} else {
collectRootNodeSources(parentSources, result);
}
}
}
private static Collection<PackagingNodeSource> getRootNodeSources(
Collection<PackagingNodeSource> nodeSources) {
Set<PackagingNodeSource> result = new HashSet<PackagingNodeSource>();
collectRootNodeSources(nodeSources, result);
return result;
}