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public static int count(String s) {
    int res = 0;
    for (int i = 0; i < s.length(); i++) {
        if(s.charAt(i) == '1') res++;
    }
    return res;
}

public List<VDictLiability> get(String currency_id, String usedTrailer, Date actualDate, String contract_class_id, String product_id, String risk_object_type_id) {
    for(int i = 0;i<5;i++){
        int j = 0;
        while(j < 32) {
            if(count(Integer.toBinaryString(j)) == i) {
                String s = Integer.toBinaryString(j);
                while (s.length() != 5) {
                    s = "0" + s;
                }
                List<VDictLiability> result = get(currency_id, usedTrailer, actualDate, contract_class_id, product_id, risk_object_type_id, s);
                if(result.size() > 0) return result;
            }
            j++;
        }
    }
    return Collections.EMPTY_LIST;
}

public List<VDictLiability> get(String currency_id, String usedTrailer, Date actualDate, String contract_class_id, String product_id, String risk_object_type_id, String mask) {
    String territoryCode = App.config.getCurrentBrunchCode().substring(1, 3);
    
...
    
    HashMap<Double, VDictLiability> map = new HashMap<Double, VDictLiability>();
    for (VDictLiability liabilityRow : get()) {
        if(!territoryType.equals(liabilityRow.getterritory_type_id()) && !(mask.charAt(4) == '1' && liabilityRow.getterritory_type_id() == null)){
            continue;
        }
        if(actualDate != null && !CompareUtil.isInside(liabilityRow.getstart_date(), liabilityRow.getend_date(), actualDate)){
            continue;
        }
        if(((risk_object_type_id != null && !CompareUtil.isEquals(liabilityRow.getrisk_object_type_id(), risk_object_type_id)) && !(mask.charAt(0) == '1' && liabilityRow.getrisk_object_type_id() == null))){
            continue;
        }
        if(((product_id != null && !CompareUtil.isEquals(liabilityRow.getproduct_id(), product_id)) && !(mask.charAt(1) == '1' && liabilityRow.getproduct_id() == null))){
            continue;
        }
        if(((contract_class_id != null && !CompareUtil.isEquals(liabilityRow.getcontract_class_id(), contract_class_id)) && !(mask.charAt(2) == '1' && liabilityRow.getcontract_class_id() == null))){
            continue;
        }
        if((liabilityRow.getcurrency_id() != null & !CompareUtil.isEquals(liabilityRow.getcurrency_id(), currency_id)) && !(mask.charAt(3) == '1' && liabilityRow.getcurrency_id() == null)){
            continue;
        }
        if(liabilityRow.getis_used_trailer() != SQLUtils.NULL_INTEGER_VALUE & !CompareUtil.isEquals(""+liabilityRow.getis_used_trailer(), usedTrailer)){
            continue;
        }
        map.put(liabilityRow.getvalue(), liabilityRow);
    }
    
    ArrayList<VDictLiability> result = new ArrayList<VDictLiability>();
    result.addAll(map.values());
...
    return result;
}

public List<VDictLiability> get(String currency_id, boolean usedTrailer, Date actualDate, String contract_class_id, String product_id, String risk_object_type_id) {
    return get(currency_id, usedTrailer?"1":"0", actualDate, contract_class_id, product_id, risk_object_type_id);
}