private static EnumSet<Feature> activeFeatures() {
            EnumSet<Feature> activeFeatures = EnumSet.noneOf(Feature.class);
            for (Feature feature : Feature.values()) {
                if (feature.isActive()) {
                    activeFeatures.add(feature);
                }
            }
            return activeFeatures;
        }

        private final boolean active;

    static def activeFeatures() {
        EnumSet<FeaturePreviews.Feature> active = EnumSet.noneOf(FeaturePreviews.Feature)
        for (FeaturePreviews.Feature feature : FeaturePreviews.Feature.values()) {
            if (feature.isActive()) {
                active.add(feature)
            }
        }
        active
    }

    static def inactiveFeatures() {
        def features = EnumSet.allOf(FeaturePreviews.Feature)

/**
 * ProfileActivator
 */
@Deprecated
public interface ProfileActivator {

    String ROLE = ProfileActivator.class.getName();

    boolean canDetermineActivation(Profile profile);

    boolean isActive(Profile profile) throws ProfileActivationException;

/**
 * Determines profile activation based on the project's packaging.
 */
@Named("packaging")
@Singleton
public class PackagingProfileActivator implements ProfileActivator {

    @Override
    public boolean isActive(
            org.apache.maven.model.Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
        return getActivationPackaging(profile).map(p -> isPackaging(context, p)).orElse(false);
    }

 * JdkPrefixProfileActivator
 */
@Deprecated
public class JdkPrefixProfileActivator extends DetectedProfileActivator {
    private static final String JDK_VERSION = System.getProperty("java.version");

    public boolean isActive(Profile profile) throws ProfileActivationException {
        Activation activation = profile.getActivation();

        String jdk = activation.getJdk();

    void testThrowingActivator() {
        DefaultProfileSelector selector = new DefaultProfileSelector();
        selector.addProfileActivator(new ProfileActivator() {
            @Override
            public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
                throw new RuntimeException("BOOM");
            }

            @Override
            public boolean presentInConfig(

    }

    protected void assertActivation(boolean active, Profile profile, ProfileActivationContext context) {
        SimpleProblemCollector problems = new SimpleProblemCollector();

        assertEquals(active, activator.isActive(new org.apache.maven.model.Profile(profile), context, problems));

        assertEquals(0, problems.getErrors().size(), problems.getErrors().toString());

/**
 * Determines profile activation based on the project's packaging.
 */
@Named("packaging")
@Singleton
public class PackagingProfileActivator implements ProfileActivator {

    @Override
    public boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems) {
        return getActivationPackaging(profile).map(p -> isPackaging(context, p)).orElse(false);
    }

    @Override

    public boolean canDetermineActivation(Profile profile) {
        Activation activation = profile.getActivation();
        return activation != null && activation.getOs() != null;
    }

    public boolean isActive(Profile profile) {
        Activation activation = profile.getActivation();
        ActivationOS os = activation.getOs();

        boolean result = ensureAtLeastOneNonNull(os);

 *
 * @see ActivationProperty
 */
@Named("property")
@Singleton
public class PropertyProfileActivator implements ProfileActivator {

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

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