public void recurseExecutions(
      AuthenticationFlowModel flow,
      List<AuthenticationExecutionInfoRepresentation> result,
      int level) {
    int index = 0;
    List<AuthenticationExecutionModel> executions = realm.getAuthenticationExecutions(flow.getId());
    for (AuthenticationExecutionModel execution : executions) {
      AuthenticationExecutionInfoRepresentation rep =
          new AuthenticationExecutionInfoRepresentation();
      rep.setLevel(level);
      rep.setIndex(index++);
      rep.setRequirementChoices(new LinkedList<String>());
      if (execution.isAuthenticatorFlow()) {
        AuthenticationFlowModel flowRef = realm.getAuthenticationFlowById(execution.getFlowId());
        if (AuthenticationFlow.BASIC_FLOW.equals(flowRef.getProviderId())) {
          rep.getRequirementChoices()
              .add(AuthenticationExecutionModel.Requirement.ALTERNATIVE.name());
          rep.getRequirementChoices().add(AuthenticationExecutionModel.Requirement.REQUIRED.name());
          rep.getRequirementChoices().add(AuthenticationExecutionModel.Requirement.DISABLED.name());
        } else if (AuthenticationFlow.FORM_FLOW.equals(flowRef.getProviderId())) {
          rep.getRequirementChoices().add(AuthenticationExecutionModel.Requirement.REQUIRED.name());
          rep.getRequirementChoices().add(AuthenticationExecutionModel.Requirement.DISABLED.name());
          rep.setProviderId(execution.getAuthenticator());
          rep.setAuthenticationConfig(execution.getAuthenticatorConfig());
        } else if (AuthenticationFlow.CLIENT_FLOW.equals(flowRef.getProviderId())) {
          rep.getRequirementChoices()
              .add(AuthenticationExecutionModel.Requirement.ALTERNATIVE.name());
          rep.getRequirementChoices().add(AuthenticationExecutionModel.Requirement.REQUIRED.name());
          rep.getRequirementChoices().add(AuthenticationExecutionModel.Requirement.DISABLED.name());
        }
        rep.setDisplayName(flowRef.getAlias());
        rep.setConfigurable(false);
        rep.setId(execution.getId());
        rep.setAuthenticationFlow(execution.isAuthenticatorFlow());
        rep.setRequirement(execution.getRequirement().name());
        rep.setFlowId(execution.getFlowId());
        result.add(rep);
        AuthenticationFlowModel subFlow = realm.getAuthenticationFlowById(execution.getFlowId());
        recurseExecutions(subFlow, result, level + 1);
      } else {
        String providerId = execution.getAuthenticator();
        ConfigurableAuthenticatorFactory factory =
            CredentialHelper.getConfigurableAuthenticatorFactory(session, providerId);
        rep.setDisplayName(factory.getDisplayType());
        rep.setConfigurable(factory.isConfigurable());
        for (AuthenticationExecutionModel.Requirement choice : factory.getRequirementChoices()) {
          rep.getRequirementChoices().add(choice.name());
        }
        rep.setId(execution.getId());

        if (factory.isConfigurable()) {
          AuthenticatorConfigModel authenticatorConfig =
              realm.getAuthenticatorConfigById(execution.getAuthenticatorConfig());

          if (authenticatorConfig != null) {
            rep.setAlias(authenticatorConfig.getAlias());
          }
        }

        rep.setRequirement(execution.getRequirement().name());
        rep.setProviderId(execution.getAuthenticator());
        rep.setAuthenticationConfig(execution.getAuthenticatorConfig());
        result.add(rep);
      }
    }
  }