Package org.openhab.core.persistence

Interface QueryablePersistenceService

All Superinterfaces:

PersistenceService

All Known Subinterfaces:

ModifiablePersistenceService

@NonNullByDefault
public interface QueryablePersistenceService
extends PersistenceService

A queryable persistence service which can be used to store and retrieve data from openHAB. This is most likely some kind of database system.

Author:

Kai Kreuzer - Initial contribution, Chris Jackson - Added getItems method

Method Summary

Modifier and Type	Method	Description
Set<PersistenceItemInfo>	getItemInfo()	Returns a set of PersistenceItemInfo about items that are stored in the persistence service.
Iterable<HistoricItem>	query(FilterCriteria filter)	Queries the PersistenceService for historic data with a given FilterCriteria.

Methods inherited from interface org.openhab.core.persistence.PersistenceService

getDefaultStrategies, getId, getLabel, store, store

Method Details

query

Iterable<HistoricItem> query(FilterCriteria filter)

Queries the PersistenceService for historic data with a given FilterCriteria.

Parameters:

filter - the filter to apply to the query

Returns:

a time series of items

getItemInfo

Set<PersistenceItemInfo> getItemInfo()

Returns a set of PersistenceItemInfo about items that are stored in the persistence service. This allows the persistence service to return information about items that are no long available as an Item in openHAB. If it is not possible to retrieve the information an empty set should be returned.

Returns:

a set of information about the persisted items