EDIT

import java.io.IOException;

import java.io.Reader;

import java.util.ArrayList;

import java.util.Collection;

import java.util.EnumSet;

import java.util.HashSet;

        DistributionInfoDTO dto = new DistributionInfoDTO();

        // Adding default initStrategies to improve the performance of this method

        // adding 'status' and 'area' has a good positive effect:

        // filterDistributions() only takes 21% of the total method time (before it was 46%)