import org.apache.maven.api.services.model.*;

/**
 * Handles normalization of a model.
 *
 */
@Named
@Singleton
public class DefaultModelNormalizer implements ModelNormalizer {

    private DuplicateMerger merger = new DuplicateMerger();

    @Override
    public Model mergeDuplicates(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {
        Model.Builder builder = Model.newBuilder(model);

            case FAMILY_MAC:
                return actualOsName.contains(FAMILY_MAC) || actualOsName.contains(DARWIN);
            case FAMILY_TANDEM:
                return actualOsName.contains("nonstop_kernel");
            case FAMILY_UNIX:
                return PATH_SEP.equals(":")
                        && !isFamily(FAMILY_OPENVMS, actualOsName)

            }
            List<Server> servers = settings.getServers();
            for (int i = 0; i < servers.size(); i++) {
                Server server = servers.get(i);
                String serverField = "servers.server[" + i + "]";
                validateStringEmpty(problems, serverField + ".username", server.getUsername(), msgS);

@Named
@Singleton
public class DefaultPluginManagementInjector implements PluginManagementInjector {

    private ManagementModelMerger merger = new ManagementModelMerger();

    @Override
    public Model injectManagement(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {
        return merger.mergeManagedBuildPlugins(model);
    }

    /**
     * ManagementModelMerger
     */

import org.apache.maven.api.model.RepositoryBase;
import org.apache.maven.api.model.Scm;
import org.apache.maven.api.model.Site;
import org.apache.maven.model.v4.MavenMerger;

/**
 * The domain-specific model merger for the Maven POM, overriding generic code from parent class when necessary with
 * more adapted algorithms.
 *
 */
public class MavenModelMerger extends MavenMerger {

    /**

        assertEquals(basedir, new File(repo.getBasedir()));
    }

    @Test
    void testAuthenticationHandling() {
        Server server = new Server();
        server.setId("repository");
        server.setUsername("jason");
        server.setPassword("abc123");

        ArtifactRepository repository =
                repositorySystem.createArtifactRepository("repository", "http://foo", null, null, null);

        for (Server server : decrypted.getServers()) {
            AuthenticationBuilder authBuilder = new AuthenticationBuilder();
            authBuilder.addUsername(server.getUsername()).addPassword(server.getPassword());
            authBuilder.addPrivateKey(server.getPrivateKey(), server.getPassphrase());
            authSelector.add(server.getId(), authBuilder.build());

    }

    @Override
    public MavenExecutionRequest addServer(Server server) {
        Objects.requireNonNull(server, "server cannot be null");

        for (Server p : getServers()) {
            if (p.getId() != null && p.getId().equals(server.getId())) {
                return this;
            }
        }

        getServers().add(server);

        return this;
    }

    @Override

        }
        return activeProxy;
    }

    public Server getServer(String serverId) {
        Server match = null;
        java.util.List<Server> servers = getServers();
        if (servers != null && serverId != null) {
            for (Server server : servers) {
                if (serverId.equals(server.getId())) {
                    match = server;
                    break;
                }
            }

                    .build(Build.newBuilder().plugins(plugins).build())
                    .build();
            model.update(merger.merge(model.getDelegate(), lifecycleModel));
        }
    }

    /**
     *  The domain-specific model merger for lifecycle bindings
     */
    protected static class LifecycleBindingsMerger extends MavenModelMerger {