return this;
    }

    @Override
    public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
        Activation activation = profile.getActivation();

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

        ActivationFile file = activation.getFile();

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

                return false;
            }
        }
        return isActive;
    }

    private boolean isActiveByDefault(Profile profile) {
        Activation activation = profile.getActivation();
        return activation != null && activation.isActiveByDefault();
    }

        profile.setId(profileXmlProfile.getId());

        profile.setSource("profiles.xml");

        org.apache.maven.profiles.Activation profileActivation = profileXmlProfile.getActivation();

        if (profileActivation != null) {
            Activation activation = new Activation();

            activation.setActiveByDefault(profileActivation.isActiveByDefault());

                    + ") with new instance from source: " + profile.getSource());
        }

        profilesById.put(profile.getId(), profile);

        Activation activation = profile.getActivation();

        if (activation != null && activation.isActiveByDefault()) {
            activateAsDefault(profileId);
        }
    }

    /* (non-Javadoc)

                })
                .filter(p -> !isEmpty(p))
                .collect(Collectors.toList());
    }

    private static boolean isEmpty(Profile profile) {
        return profile.getActivation() == null
                && profile.getBuild() == null
                && profile.getDependencies().isEmpty()
                && (profile.getDependencyManagement() == null

                            "must be unique but found duplicate profile with id " + profile.getId(),
                            profile);
                }

                validate30RawProfileActivation(problems, profile.getActivation(), prefix);

                validate20RawDependencies(
                        problems, profile.getDependencies(), prefix, "dependencies.dependency.", request);

        if (!requiredSelectors.isEmpty() || !optionalSelectors.isEmpty()) {
            Set<MavenProject> selectedProjects =
                    projectSelector.getActiveProjects(request, allSortedProjects, projectActivation.getActivations());

            // it can be empty when an optional project is missing from the reactor, fallback to returning all projects
            if (!selectedProjects.isEmpty()) {

public class DefaultProfileSelectorTest {
    private Profile newProfile(String id) {
        Activation activation = new Activation();
        Profile profile = new Profile();
        profile.setId(id);
        profile.setActivation(activation);
        return profile;
    }

    @Test
    void testThrowingActivator() {
        DefaultProfileSelector selector = new DefaultProfileSelector();