resolvedArtifacts.put(key, previousNodes);
        }
        previousNodes.add(node);

        if (node.isActive()) {
            fireEvent(ResolutionListener.INCLUDE_ARTIFACT, listeners, node);
        }

        // don't pull in the transitive deps of a system-scoped dependency.
        if (node.isActive() && !Artifact.SCOPE_SYSTEM.equals(node.getArtifact().getScope())) {

     *            {@code null}.
     * @return {@code true} if the profile is active, {@code false} otherwise.
     */
    boolean isActive(Profile profile, ProfileActivationContext context, ModelProblemCollector problems);

    /**
     * Determines whether specified activation method is present in configuration or not. It should help to have AND

 */
@Named("os")
@Singleton
public class OperatingSystemProfileActivator implements ProfileActivator {

    private static final String REGEX_PREFIX = "regex:";

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

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

    }

    protected boolean canDetectActivation(Profile profile) {
        return profile.getActivation() != null && profile.getActivation().getProperty() != null;
    }

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

        ActivationProperty property = activation.getProperty();

        if (property != null) {

    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);

    private Logger logger;

    protected boolean canDetectActivation(Profile profile) {
        return profile.getActivation() != null && profile.getActivation().getFile() != null;
    }

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

        ActivationFile actFile = activation.getFile();

        if (actFile != null) {

        this.profileActivationFilePathInterpolator = profileActivationFilePathInterpolator;
    }

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

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

    }

    @Override
    public boolean isLoading() {
      return true;
    }

    @Override
    public boolean isActive() {
      return oldValue.isActive();
    }

    @Override
    public int getWeight() {
      return oldValue.getWeight();
    }

    @CanIgnoreReturnValue

    private static final Pattern FILTER_2 = Pattern.compile("[._-]");
    private static final Pattern FILTER_3 = Pattern.compile("\\."); // used for split now

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

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

      this.oldValue = oldValue;
    }

    @Override
    public boolean isLoading() {
      return true;
    }

    @Override
    public boolean isActive() {
      return oldValue.isActive();
    }

    @Override
    public int getWeight() {
      return oldValue.getWeight();
    }

    @CanIgnoreReturnValue