public boolean isValid()

in src/main/java/org/apache/sling/jcr/resource/internal/JcrSystemUserValidator.java [116:165]
46 lines of code
9 McCabe index (conditional complexity)

    public boolean isValid(final String serviceUserId, final String serviceName, final String subServiceName) {
        if (cycleDetection.get()) {
            // We are being asked to valid our own service user - hence, allow.
            return true;
        }
        if (serviceUserId == null) {
            log.debug("The provided service user id is null");
            return false;
        }
        if (!allowOnlySystemUsers) {
            log.debug("There is no enforcement of JCR system users, therefore service user id '{}' is valid", serviceUserId);
            return true;
        }
        if (validIds.contains(serviceUserId)) {
            log.debug("The provided service user id '{}' has been already validated and is a known JCR system user id", serviceUserId);
            return true;
        } else {
            Session session = null;
            try {
                try {
                    /*
                     * We have to prevent a cycle if we are trying to login ourselves
                     */
                    cycleDetection.set(true);
                    try {
                        session = repository.loginService(VALIDATION_SERVICE_USER, null);
                    } finally {
                        cycleDetection.set(false);
                    }
                    if (session instanceof JackrabbitSession) {
                        final UserManager userManager = ((JackrabbitSession) session).getUserManager();
                        final Authorizable authorizable = userManager.getAuthorizable(serviceUserId);
                        if (isValidSystemUser(authorizable)) {
                            validIds.add(serviceUserId);
                            log.debug("The provided service user id {} is a known JCR system user id", serviceUserId);
                            return true;
                        }
                    }
                } catch (final RepositoryException e) {
                    log.warn("Could not get user information", e);
                }
            } finally {
                if (session != null) {
                    session.logout();
                }
            }
            log.warn("The provided service user id '{}' is not a known JCR system user id and therefore not allowed in the Sling Service User Mapper.", serviceUserId);
            return false;
        }
    }