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public static final Comparator<R020Operation> COMPARATOR_NEW = new Comparator<R020Operation>() {
        @Override
        public int compare(R020Operation a, R020Operation b) {
            int result = 0;

            if (a.getDebet() == null) a.setDebet(BigDecimal.ZERO);
            if (b.getDebet() == null) b.setDebet(BigDecimal.ZERO);
            if (a.getCredit() == null) a.setCredit(BigDecimal.ZERO);
            if (b.getCredit() == null) b.setCredit(BigDecimal.ZERO);
            boolean isDebetOperationA = a.getDebet().compareTo(BigDecimal.ZERO) > 0;
            boolean isDebetOperationB = b.getDebet().compareTo(BigDecimal.ZERO) > 0;

            if (a.getOperationDate() != null && b.getOperationDate() != null) {
                Date dateA = DateUtils.truncateTime(a.getOperationDate());
                Date dateB = DateUtils.truncateTime(b.getOperationDate());
                result = dateA.compareTo(dateB);
            }

            if (result == 0) result = ((Boolean) (!isDebetOperationA)).compareTo(!isDebetOperationB);
            if (result == 0) result = (isDebetOperationA ? a.getDebet() : a.getCredit()).compareTo(isDebetOperationB ? b.getDebet() : b.getCredit());
            if (result == 0){
                Integer documentNumberA;
                Integer documentNumberB;
                try {
                    documentNumberA = Integer.parseInt(a.getDocumentNumber());
                } catch (NumberFormatException e) {
                    documentNumberA = 0;
                }
                try {
                    documentNumberB = Integer.parseInt(b.getDocumentNumber());
                } catch (NumberFormatException e) {
                    documentNumberB = 0;
                }

                result = documentNumberA.compareTo(documentNumberB);
            }

            return result;
        }
    };