@Override public int compare(BlockInstance o1, BlockInstance o2) { BlockConfigurationEntry bc1 = o1.getBlock(); BlockConfigurationEntry bc2 = o2.getBlock(); BlockEntry b1 = bc1.getBlock(); BlockEntry b2 = bc2.getBlock(); AgencyAndId bId1 = b1.getId(); AgencyAndId bId2 = b2.getId(); int rc = bId1.compareTo(bId2); if (rc != 0) return rc; rc = bc1.getServiceIds().compareTo(bc2.getServiceIds()); if (rc != 0) return rc; return Double.compare(o1.getServiceDate(), o2.getServiceDate()); }