@POST
@Path("/queryMin")
@Produces(MediaType.APPLICATION_JSON)
@Consumes({MediaType.APPLICATION_JSON, MediaType.TEXT_PLAIN})
public String getMinimumField(String field) {
String result = null;
final ParameterQuerySender parameterQuerySenderService =
(ParameterQuerySender) getServiceTracker().getService();
if (parameterQuerySenderService != null) {
DBObject mongoQuery = new BasicDBObject();
Object qRes = parameterQuerySenderService.queryMin(mongoQuery, field);
if (qRes instanceof List<?>) {
List<?> dbResult = (List<?>) qRes;
if (dbResult.size() == 1) {
result = JSON.serialize(dbResult.get(0));
} else {
LOG.error(
"Expected only one result from database when querying for minimum value of a field! Received "
+ dbResult.size());
}
} else {
LOG.error("Object returned from the parameter archiver was not a List<?>");
}
} else {
LOG.warn("No " + SERVICE_INTERFACE + " service found.");
}
return result;
}
