/**
* Get the backup data and put it back in the active Poi, at the end the backup Poi is deleted.
*
* @param poiId The Id of the Poi to revert.
*/
private void revertPoi(Long poiId) {
Poi poi = poiDao.queryForId(poiId);
Poi backup;
Long oldPoiId = poi.getOldPoiId();
if (oldPoiId != null) {
backup = poiDao.queryForId(oldPoiId);
// we retrieve the backup data and put it back
backup.setOld(false);
backup.setId(poi.getId());
savePoi(backup);
// we prepare to delete the modifications
poi.setId(oldPoiId);
}
deletePoi(poi);
}
/**
* Merge POIs in parameters to those already in the database.
*
* @param remotePois The POIs to merge.
*/
public void mergeFromOsmPois(List<Poi> remotePois) {
List<Poi> toMergePois = new ArrayList<>();
Map<String, Poi> remotePoisMap = new HashMap<>();
// Map remote Poi backend Ids
for (Poi poi : remotePois) {
remotePoisMap.put(poi.getBackendId(), poi);
}
// List matching Pois
List<Poi> localPois = poiDao.queryForBackendIds(remotePoisMap.keySet());
Map<String, Poi> localPoisMap = new HashMap<>();
// Map matching local Pois
for (Poi localPoi : localPois) {
localPoisMap.put(localPoi.getBackendId(), localPoi);
}
// Browse remote pois
for (Poi remotePoi : remotePois) {
Poi localPoi = localPoisMap.get(remotePoi.getBackendId());
Long localVersion = -1L;
// If localPoi is versioned
if (localPoi != null && localPoi.getVersion() != null) {
localVersion = Long.valueOf(localPoi.getVersion());
}
// Compute version delta
if (Long.valueOf(remotePoi.getVersion()) > localVersion) {
// Remote version is newer, override existing one
if (localPoi != null) {
remotePoi.setId(localPoi.getId());
}
// This Poi should be updated
toMergePois.add(remotePoi);
}
}
// savePois of either new or existing Pois
savePois(toMergePois);
}