public OnmsCriteria buildCriteria(HttpServletRequest request) {
        
        OnmsCriteria criteria = new OnmsCriteria(OnmsOutage.class);

        Locale locale = Locale.getDefault();
        SimpleDateFormat d_format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",
                                                         locale);

        // node
        if (request.getParameter("nodeid") != null) {
            criteria.add(Restrictions.eq("node.id", request.getParameter("nodeid")));
        }

        if (request.getParameter("not_nodeid") != null) {
            criteria.add(Restrictions.ne("node.id", request.getParameter("not_nodeid")));
        }

        if (request.getParameter("ipaddr") != null) {
            criteria.add(Restrictions.eq("ipInterface.ipAddress", request.getParameter("ipaddr")));
        }

        if (request.getParameter("not_ipaddr") != null) {
            criteria.add(Restrictions.ne("ipInterface.ipAddress", request.getParameter("not_ipaddr")));
        }

        if (request.getParameter("serviceid") != null) {
            criteria.add(Restrictions.eq("monitoredService.id", request.getParameter("serviceid")));
        }

        if (request.getParameter("not_serviceid") != null) {
            criteria.add(Restrictions.ne("monitoredService.id", request.getParameter("not_serviceid")));
        }

        if (request.getParameter("smaller_iflostservice") != null) {
            Date date = new Date(Long.parseLong(request.getParameter("smaller_iflostservice")));
            criteria.add(Restrictions.lt("ifLostService", date));
        }

        if (request.getParameter("bigger_iflostservice") != null) {
            Date date = new Date(Long.parseLong(request.getParameter("bigger_iflostservice")));
            criteria.add(Restrictions.gt("ifLostService", date));
        }

        if (request.getParameter("smaller_ifregainedservice") != null) {
            Date date = new Date(Long.parseLong(request.getParameter("smaller_ifregainedservice")));
            criteria.add(Restrictions.lt("ifRegainedService", date));
        }

        if (request.getParameter("bigger_ifregainedservice") != null) {
            Date date = new Date(Long.parseLong(request.getParameter("bigger_ifregainedservice")));
            criteria.add(Restrictions.gt("ifRegainedService", date));
        }

        if (request.getParameter("building") != null) {
            criteria.createAlias("node.assetRecord", "assetRecord");
            criteria.add(Restrictions.eq("assetRecord.building", request.getParameter("building")));
        }

        if ("true".equals(request.getParameter("currentOutages"))) {
            criteria.add(Restrictions.isNull("ifRegainedService"));
        }

        if ("true".equals(request.getParameter("resolvedOutages"))) {
            criteria.add(Restrictions.isNotNull("ifRegainedService"));
        }

        return criteria;
    }