for (RemoteRepository repo : repoArray) {
collectRequest.addRepository(repo);
}
RepositorySystem system = getRepositorySystem();
DependencyNode rootNode = system.collectDependencies(session, collectRequest).getRoot();
DependencyRequest dependencyRequest = new DependencyRequest();
dependencyRequest.setRoot(rootNode);
system.resolveDependencies(session, dependencyRequest);
PreorderNodeListGenerator nlg = new PreorderNodeListGenerator();
rootNode.accept(nlg);