public final CollectResult collectDependencies()

in maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/collect/DependencyCollectorDelegate.java [124:271]
124 lines of code
17 McCabe index (conditional complexity)

    public final CollectResult collectDependencies(RepositorySystemSession session, CollectRequest request)
            throws DependencyCollectionException {
        requireNonNull(session, "session cannot be null");
        requireNonNull(request, "request cannot be null");

        InternalScopeManager scopeManager = (InternalScopeManager) session.getScopeManager();
        session = setUpSession(session, request, scopeManager);

        RequestTrace trace = RequestTrace.newChild(request.getTrace(), request);

        CollectResult result = new CollectResult(request);

        DependencyTraverser depTraverser = session.getDependencyTraverser();
        VersionFilter verFilter = session.getVersionFilter();

        Dependency root = request.getRoot();
        List<RemoteRepository> repositories = request.getRepositories();
        List<Dependency> dependencies = request.getDependencies();
        List<Dependency> managedDependencies = request.getManagedDependencies();

        Map<String, Object> stats = new LinkedHashMap<>();
        long time1 = System.nanoTime();

        DefaultDependencyNode node;
        if (root != null) {
            List<? extends Version> versions;
            VersionRangeResult rangeResult;
            try {
                VersionRangeRequest rangeRequest = new VersionRangeRequest(
                        root.getArtifact(), request.getRepositories(), request.getRequestContext());
                rangeRequest.setTrace(trace);
                rangeResult = versionRangeResolver.resolveVersionRange(session, rangeRequest);
                versions = filterVersions(root, rangeResult, verFilter, new DefaultVersionFilterContext(session));
            } catch (VersionRangeResolutionException e) {
                result.addException(e);
                throw new DependencyCollectionException(result, e.getMessage());
            }

            Version version = versions.get(versions.size() - 1);
            root = root.setArtifact(root.getArtifact().setVersion(version.toString()));

            ArtifactDescriptorResult descriptorResult;
            try {
                ArtifactDescriptorRequest descriptorRequest = new ArtifactDescriptorRequest();
                descriptorRequest.setArtifact(root.getArtifact());
                descriptorRequest.setRepositories(request.getRepositories());
                descriptorRequest.setRequestContext(request.getRequestContext());
                descriptorRequest.setTrace(trace);
                if (isLackingDescriptor(session, root.getArtifact())) {
                    descriptorResult = new ArtifactDescriptorResult(descriptorRequest);
                } else {
                    descriptorResult = descriptorReader.readArtifactDescriptor(session, descriptorRequest);
                    for (ArtifactDecorator decorator :
                            Utils.getArtifactDecorators(session, artifactDecoratorFactories)) {
                        descriptorResult.setArtifact(decorator.decorateArtifact(descriptorResult));
                    }
                }
            } catch (ArtifactDescriptorException e) {
                result.addException(e);
                throw new DependencyCollectionException(result, e.getMessage());
            }

            root = root.setArtifact(descriptorResult.getArtifact());

            if (!session.isIgnoreArtifactDescriptorRepositories()) {
                repositories = remoteRepositoryManager.aggregateRepositories(
                        session, repositories, descriptorResult.getRepositories(), true);
            }
            dependencies = mergeDeps(dependencies, descriptorResult.getDependencies());
            managedDependencies = mergeDeps(managedDependencies, descriptorResult.getManagedDependencies());

            node = new DefaultDependencyNode(root);
            node.setRequestContext(request.getRequestContext());
            node.setRelocations(descriptorResult.getRelocations());
            node.setVersionConstraint(rangeResult.getVersionConstraint());
            node.setVersion(version);
            node.setAliases(descriptorResult.getAliases());
            node.setRepositories(request.getRepositories());
        } else {
            node = new DefaultDependencyNode(request.getRootArtifact());
            node.setRequestContext(request.getRequestContext());
            node.setRepositories(request.getRepositories());
        }

        result.setRoot(node);

        boolean traverse = root == null || depTraverser == null || depTraverser.traverseDependency(root);
        String errorPath = null;
        if (traverse && !dependencies.isEmpty()) {
            DataPool pool = new DataPool(session);

            DefaultDependencyCollectionContext context = new DefaultDependencyCollectionContext(
                    session, request.getRootArtifact(), root, managedDependencies);

            DefaultVersionFilterContext versionContext = new DefaultVersionFilterContext(session);

            Results results = new Results(result, session);

            doCollectDependencies(
                    session,
                    trace,
                    pool,
                    context,
                    versionContext,
                    request,
                    node,
                    repositories,
                    dependencies,
                    managedDependencies,
                    results);

            errorPath = results.getErrorPath();
        }

        long time2 = System.nanoTime();

        DependencyGraphTransformer transformer = session.getDependencyGraphTransformer();
        if (transformer != null) {
            try {
                DefaultDependencyGraphTransformationContext context =
                        new DefaultDependencyGraphTransformationContext(session);
                context.put(TransformationContextKeys.STATS, stats);
                result.setRoot(transformer.transformGraph(node, context));
            } catch (RepositoryException e) {
                result.addException(e);
            }
        }

        long time3 = System.nanoTime();
        if (logger.isDebugEnabled()) {
            stats.put(getClass().getSimpleName() + ".collectTime", time2 - time1);
            stats.put(getClass().getSimpleName() + ".transformTime", time3 - time2);
            logger.debug("Dependency collection stats {}", stats);
        }

        if (errorPath != null) {
            throw new DependencyCollectionException(result, "Failed to collect dependencies at " + errorPath);
        }
        if (!result.getExceptions().isEmpty()) {
            throw new DependencyCollectionException(result);
        }

        if (request.getResolutionScope() != null) {
            return scopeManager.postProcess(request.getResolutionScope(), result);
        } else {
            return result;
        }
    }