Examples of org.openhab.core.persistence.QueryablePersistenceService.query()

Class org.openhab.core.persistence.QueryablePersistenceService

Examples of org.openhab.core.persistence.QueryablePersistenceService.query()

org.openhab.core.persistence.QueryablePersistenceService.query()
Queries the {@link PersistenceService} for data with a given filter criteria @param filter the filter to apply to the query @return a time series of items

            if(appliesToItem(config, item)) {
              PersistenceService service = persistenceServices.get(serviceName);
              if(service instanceof QueryablePersistenceService) {
                QueryablePersistenceService queryService = (QueryablePersistenceService) service;
                FilterCriteria filter = new FilterCriteria().setItemName(item.getName()).setPageSize(1);
                Iterable<HistoricItem> result = queryService.query(filter);
                Iterator<HistoricItem> it = result.iterator();
                if(it.hasNext()) {
                  HistoricItem historicItem = it.next();
                  GenericItem genericItem = (GenericItem) item;
                  genericItem.removeStateChangeListener(this);

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      FilterCriteria filter = new FilterCriteria();
      filter.setEndDate(timestamp.toDate());
      filter.setItemName(item.getName());
      filter.setPageSize(1);
      filter.setOrdering(Ordering.DESCENDING);
      Iterable<HistoricItem> result = qService.query(filter);
      if(result.iterator().hasNext()) {
        return result.iterator().next();
      } else {
        return null;
      }

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      QueryablePersistenceService qService = (QueryablePersistenceService) service;
      FilterCriteria filter = new FilterCriteria();
      filter.setItemName(item.getName());
      filter.setOrdering(Ordering.DESCENDING);
      filter.setPageSize(1);
      Iterable<HistoricItem> result = qService.query(filter);
      if (result.iterator().hasNext()) {
        return result.iterator().next().getTimestamp();
      } else {
        return null;
      }

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      filter.setPageSize(skipEqual ? 1000 : 1);
      int startPage = 0;
      filter.setPageNumber(startPage);


      Iterable<HistoricItem> items = qService.query(filter);
      while (items != null) {
        Iterator<HistoricItem> itemIterator = items.iterator();
        int itemCount = 0;
        while (itemIterator.hasNext()) {
          HistoricItem historicItem = itemIterator.next();

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            return historicItem;
          }
        }
        if (itemCount == filter.getPageSize()) {
          filter.setPageNumber(++startPage);
          items = qService.query(filter);
        }
        else {
          items = null;
        }
      }

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      QueryablePersistenceService qService = (QueryablePersistenceService) service;
      FilterCriteria filter = new FilterCriteria();
      filter.setBeginDate(timestamp.toDate());
      filter.setItemName(item.getName());
      filter.setOrdering(Ordering.ASCENDING);
      return qService.query(filter);
    } else {
      logger.warn("There is no queryable persistence service registered with the name '{}'", serviceName);
      return Collections.emptySet();
    }
  }

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