fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/transactionprocessor/impl/DuePenIntPriFeeInAdvancePenIntPriFeeLoanRepaymentScheduleTransactionProcessor.java [256:291]:
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    protected Money handleRefundTransactionPaymentOfInstallment(final LoanRepaymentScheduleInstallment currentInstallment,
            final LoanTransaction loanTransaction, final Money transactionAmountUnprocessed,
            List<LoanTransactionToRepaymentScheduleMapping> transactionMappings) {

        final LocalDate transactionDate = loanTransaction.getTransactionDate();
        final MonetaryCurrency currency = transactionAmountUnprocessed.getCurrency();
        Money transactionAmountRemaining = transactionAmountUnprocessed;
        Money principalPortion = Money.zero(currency);
        Money interestPortion = Money.zero(currency);
        Money feeChargesPortion = Money.zero(currency);
        Money penaltyChargesPortion = Money.zero(currency);

        principalPortion = currentInstallment.unpayPrincipalComponent(transactionDate, transactionAmountRemaining);
        transactionAmountRemaining = transactionAmountRemaining.minus(principalPortion);

        if (transactionAmountRemaining.isGreaterThanZero()) {
            interestPortion = currentInstallment.unpayInterestComponent(transactionDate, transactionAmountRemaining);
            transactionAmountRemaining = transactionAmountRemaining.minus(interestPortion);
        }

        if (transactionAmountRemaining.isGreaterThanZero()) {
            feeChargesPortion = currentInstallment.unpayFeeChargesComponent(transactionDate, transactionAmountRemaining);
            transactionAmountRemaining = transactionAmountRemaining.minus(feeChargesPortion);
        }

        if (transactionAmountRemaining.isGreaterThanZero()) {
            penaltyChargesPortion = currentInstallment.unpayPenaltyChargesComponent(transactionDate, transactionAmountRemaining);
            transactionAmountRemaining = transactionAmountRemaining.minus(penaltyChargesPortion);
        }
        loanTransaction.updateComponents(principalPortion, interestPortion, feeChargesPortion, penaltyChargesPortion);
        if (principalPortion.plus(interestPortion).plus(feeChargesPortion).plus(penaltyChargesPortion).isGreaterThanZero()) {
            transactionMappings.add(LoanTransactionToRepaymentScheduleMapping.createFrom(loanTransaction, currentInstallment,
                    principalPortion, interestPortion, feeChargesPortion, penaltyChargesPortion));
        }
        return transactionAmountRemaining;
    }
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fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/transactionprocessor/impl/DuePenFeeIntPriInAdvancePriPenFeeIntLoanRepaymentScheduleTransactionProcessor.java [254:289]:
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    protected Money handleRefundTransactionPaymentOfInstallment(final LoanRepaymentScheduleInstallment currentInstallment,
            final LoanTransaction loanTransaction, final Money transactionAmountUnprocessed,
            List<LoanTransactionToRepaymentScheduleMapping> transactionMappings) {

        final LocalDate transactionDate = loanTransaction.getTransactionDate();
        final MonetaryCurrency currency = transactionAmountUnprocessed.getCurrency();
        Money transactionAmountRemaining = transactionAmountUnprocessed;
        Money principalPortion = Money.zero(currency);
        Money interestPortion = Money.zero(currency);
        Money feeChargesPortion = Money.zero(currency);
        Money penaltyChargesPortion = Money.zero(currency);

        principalPortion = currentInstallment.unpayPrincipalComponent(transactionDate, transactionAmountRemaining);
        transactionAmountRemaining = transactionAmountRemaining.minus(principalPortion);

        if (transactionAmountRemaining.isGreaterThanZero()) {
            interestPortion = currentInstallment.unpayInterestComponent(transactionDate, transactionAmountRemaining);
            transactionAmountRemaining = transactionAmountRemaining.minus(interestPortion);
        }

        if (transactionAmountRemaining.isGreaterThanZero()) {
            feeChargesPortion = currentInstallment.unpayFeeChargesComponent(transactionDate, transactionAmountRemaining);
            transactionAmountRemaining = transactionAmountRemaining.minus(feeChargesPortion);
        }

        if (transactionAmountRemaining.isGreaterThanZero()) {
            penaltyChargesPortion = currentInstallment.unpayPenaltyChargesComponent(transactionDate, transactionAmountRemaining);
            transactionAmountRemaining = transactionAmountRemaining.minus(penaltyChargesPortion);
        }
        loanTransaction.updateComponents(principalPortion, interestPortion, feeChargesPortion, penaltyChargesPortion);
        if (principalPortion.plus(interestPortion).plus(feeChargesPortion).plus(penaltyChargesPortion).isGreaterThanZero()) {
            transactionMappings.add(LoanTransactionToRepaymentScheduleMapping.createFrom(loanTransaction, currentInstallment,
                    principalPortion, interestPortion, feeChargesPortion, penaltyChargesPortion));
        }
        return transactionAmountRemaining;
    }
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