if (proxy != null) {
                    Proxy p = new Proxy();
                    p.setHost(proxy.getHost());
                    p.setProtocol(proxy.getType());
                    p.setPort(proxy.getPort());
                    if (proxy.getAuthentication() != null) {
                        repo = new RemoteRepository.Builder(repo)

            AuthenticationBuilder authBuilder = new AuthenticationBuilder();
            authBuilder.addUsername(proxy.getUserName()).addPassword(proxy.getPassword());
            result = new Proxy(proxy.getProtocol(), proxy.getHost(), proxy.getPort(), authBuilder.build());
        }
        return result;
    }

    public static ArtifactHandler newHandler(Artifact artifact) {

                            null,
                            "must be unique but found duplicate proxy with id " + proxy.getId());
                }
                validateStringNotEmpty(problems, "proxies.proxy.host", proxy.getHost(), proxy.getId());

                try {
                    Integer.parseInt(proxy.getPortString());
                } catch (NumberFormatException e) {
                    addViolation(

            if (proxy != null) {
                org.apache.maven.repository.Proxy p = new org.apache.maven.repository.Proxy();
                p.setHost(proxy.getHost());
                p.setProtocol(proxy.getType());
                p.setPort(proxy.getPort());
                if (proxy.getAuthentication() != null) {
                    repo = new RemoteRepository.Builder(repo).setProxy(proxy).build();

            proxySelector.add(
                    new org.eclipse.aether.repository.Proxy(
                            proxy.getProtocol(), proxy.getHost(), proxy.getPort(), authBuilder.build()),
                    proxy.getNonProxyHosts());
        }
        sessionBuilder.setProxySelector(proxySelector);

                public List<Exception> getExceptions() {
                    return result.getExceptions();
                }

                @Override
                public Node getRoot() {
                    return session.getNode(result.getRoot(), request.getVerbose());
                }
            };
        } catch (DependencyCollectionException e) {

                public List<Exception> getExceptions() {
                    return result.getExceptions();
                }

                @Override
                public Node getRoot() {
                    return session.getNode(result.getRoot(), request.getVerbose());
                }
            };
        } catch (DependencyCollectionException e) {

        Activation activation = profile.getActivation();

        if (activation == null) {
            return false;
        }

        ActivationOS os = activation.getOs();

        if (os == null) {
            return false;
        }

        boolean active = ensureAtLeastOneNonNull(os);

                plugin, parent, null, foreignImports, toAetherArtifacts(pluginArtifacts));

        discoverPluginComponents(pluginRealm, plugin, pluginDescriptor);

        pluginDescriptor.setDependencyNode(result.getRoot());
        pluginDescriptor.setClassRealm(pluginRealm);
        pluginDescriptor.setArtifacts(pluginArtifacts);
    }

    private void discoverPluginComponents(

    List<Exception> getExceptions();

    /**
     * Gets the root node of the dependency graph.
     *
     * @return the root node of the dependency graph or {@code null} if none
     */
    @Nullable
    Node getRoot();