Example - Worst Sibling Status Rule

public void calculateKPI(CI ci, KPI kpi) {
    // Get a list of all the KPIs for the CI.
    List<KPI> ciKpiList = ci.getAllKPIs();
    /**
     * Create a variable to set the status of the calculated KPI,
     * only if an active status is found.
     */
    boolean isActiveStatusFound = false;
    // Set the current worst status to OK; if a worse status is found this will be updated.
    Status worstStatus = Status.OK;
    // Go over the list of the CI's KPIs.
    ciKpiList.each {KPI ciKPI ->
        /**
        * Check that the CI's KPI is not the calculated KPI.
        * This is needed because getAllKPIs method returns all the KPIs for the CI.
        */
        if (ciKPI !=  kpi) {
            /**
             * The ciKPI represents a sibling KPI of the calculated KPI.
             * Get the sibling KPI's status.
             */
            Status siblingKpiStatus = ciKPI.status;
            // Update worstStatus if necessary.
            if (siblingKpiStatus.isActive()) {
                isActiveStatusFound = true;
                if (siblingKpiStatus.isWorse(worstStatus)) {
                    worstStatus = siblingKpiStatus;
                 }
            }
        }
    }
    // Check if an active status was found in the sibling KPI.
    if (isActiveStatusFound) {
        // Set the calculated KPI's status.
        kpi.setStatus(worstStatus);
    }
}