class OperatingSystemProfileActivator implements ProfileActivator {

    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);

        if (result && os.getFamily() != null) {
            result = determineFamilyMatch(os.getFamily());
        }
        if (result && os.getName() != null) {
            result = determineNameMatch(os.getName());
        }
        if (result && os.getArch() != null) {
            result = determineArchMatch(os.getArch());
        }
        if (result && os.getVersion() != null) {
            result = determineVersionMatch(os.getVersion());
        }
        return result;
    }

    private boolean ensureAtLeastOneNonNull(ActivationOS os) {
        return os.getArch() != null || os.getFamily() != null || os.getName() != null || os.getVersion() != null;
    }

    private boolean determineVersionMatch(String version) {
        String test = version;
        boolean reverse = false;

        if (test.startsWith("!")) {
            reverse = true;
            test = test.substring(1);
        }

        boolean result = Os.OS_VERSION.equals(test);

        if (reverse) {
            return !result;
        } else {
            return result;
        }
    }

    private boolean determineArchMatch(String arch) {<FILL_FUNCTION_BODY>}

    private boolean determineNameMatch(String name) {
        String test = name;
        boolean reverse = false;

        if (test.startsWith("!")) {
            reverse = true;
            test = test.substring(1);
        }

        boolean result = Os.OS_NAME.equals(test);

        if (reverse) {
            return !result;
        } else {
            return result;
        }
    }

    private boolean determineFamilyMatch(String family) {
        String test = family;
        boolean reverse = false;

        if (test.startsWith("!")) {
            reverse = true;
            test = test.substring(1);
        }

        boolean result = Os.isFamily(test);

        if (reverse) {
            return !result;
        } else {
            return result;
        }
    }
}

        String test = arch;
        boolean reverse = false;

        if (test.startsWith("!")) {
            reverse = true;
            test = test.substring(1);
        }

        boolean result = Os.OS_ARCH.equals(test);

        if (reverse) {
            return !result;
        } else {
            return result;
        }
    
<no_super_class>