/**
* Merges the results of the request subparts into one feature collection.
*
* @param fcid id of the new (result) feature collection
* @param finishedEvents
* @return feature collection containing all features from all responses
* @throws OGCWebServiceException
*/
private FeatureCollection mergeResults(
String fcid, List<ExecutionFinishedEvent<FeatureCollection>> finishedEvents)
throws OGCWebServiceException {
FeatureCollection result = null;
try {
for (ExecutionFinishedEvent<FeatureCollection> event : finishedEvents) {
if (result == null) {
result = event.getResult();
} else {
result.addAll(event.getResult());
}
}
} catch (CancellationException e) {
String msg = Messages.getMessage("WFS_GET_FEATURE_TIMEOUT");
LOG.logInfo(msg);
throw new OGCWebServiceException(this.getClass().getName(), msg);
} catch (Throwable t) {
String msg = Messages.getMessage("WFS_GET_FEATURE_BACKEND", t.getMessage());
LOG.logError(msg, t);
throw new OGCWebServiceException(this.getClass().getName(), msg);
}
result.setId(fcid);
result.setAttribute("numberOfFeatures", "" + result.size());
return result;
}
/**
* Merges the results of the request subparts into one feature collection.
*
* <p>This method is used if only the HITS have been requested, i.e. the number of features.
*
* <p>TODO: Do this a better way (maybe change feature model).
*
* @param fcid id of the new (result) feature collection
* @param finishedEvents
* @return empty feature collection with "numberOfFeatures" attribute
* @throws OGCWebServiceException
*/
private FeatureCollection mergeHits(
String fcid, List<ExecutionFinishedEvent<FeatureCollection>> finishedEvents)
throws OGCWebServiceException {
FeatureCollection result = null;
int numberOfFeatures = 0;
try {
for (ExecutionFinishedEvent<FeatureCollection> event : finishedEvents) {
FeatureCollection fc = event.getResult();
try {
numberOfFeatures += Integer.parseInt((fc.getAttribute("numberOfFeatures")));
} catch (NumberFormatException e) {
String msg =
"Internal error. Could not parse 'numberOfFeatures' attribute "
+ "of sub-result as an integer value.";
throw new OGCWebServiceException(this.getClass().getName(), msg);
}
if (result == null) {
result = fc;
} else {
result.addAll(fc);
}
}
} catch (CancellationException e) {
String msg = Messages.getMessage("WFS_GET_FEATURE_TIMEOUT");
LOG.logInfo(msg);
throw new OGCWebServiceException(this.getClass().getName(), msg);
} catch (Throwable t) {
String msg = Messages.getMessage("WFS_GET_FEATURE_BACKEND", t.getMessage());
LOG.logError(msg);
throw new OGCWebServiceException(this.getClass().getName(), msg);
}
result.setId(fcid);
result.setAttribute("numberOfFeatures", "" + numberOfFeatures);
return result;
}