| /* |
| * Copyright 2017 The Mifos Initiative. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package io.mifos.individuallending.internal.service; |
| |
| import io.mifos.individuallending.api.v1.domain.workflow.Action; |
| import io.mifos.portfolio.api.v1.domain.ChargeDefinition; |
| import org.springframework.stereotype.Service; |
| |
| import java.math.BigDecimal; |
| import java.time.Duration; |
| import java.time.temporal.ChronoUnit; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| /** |
| * @author Myrle Krantz |
| */ |
| @SuppressWarnings("WeakerAccess") |
| @Service |
| public class PeriodChargeCalculator { |
| public PeriodChargeCalculator() |
| { |
| } |
| |
| static Map<Period, BigDecimal> getPeriodAccrualInterestRate(final List<ScheduledCharge> scheduledCharges, |
| final int precision) { |
| return scheduledCharges.stream() |
| .filter(PeriodChargeCalculator::accruedInterestCharge) |
| .collect(Collectors.groupingBy(scheduledCharge -> scheduledCharge.getScheduledAction().repaymentPeriod, |
| Collectors.mapping(x -> chargeAmountPerPeriod(x, precision), RateCollectors.compound(precision)))); |
| } |
| |
| private static boolean accruedInterestCharge(final ScheduledCharge scheduledCharge) |
| { |
| return scheduledCharge.getChargeDefinition().getAccrualAccountDesignator() != null && |
| scheduledCharge.getChargeDefinition().getAccrueAction() != null && |
| scheduledCharge.getChargeDefinition().getAccrueAction().equals(Action.APPLY_INTEREST.name()) && |
| scheduledCharge.getScheduledAction().action == Action.ACCEPT_PAYMENT && |
| scheduledCharge.getScheduledAction().actionPeriod != null; |
| } |
| |
| static BigDecimal chargeAmountPerPeriod(final ScheduledCharge scheduledCharge, final int precision) |
| { |
| final ChargeDefinition chargeDefinition = scheduledCharge.getChargeDefinition(); |
| final ScheduledAction scheduledAction = scheduledCharge.getScheduledAction(); |
| if (chargeDefinition.getForCycleSizeUnit() == null) |
| return chargeDefinition.getAmount(); |
| |
| final BigDecimal actionPeriodDuration |
| = BigDecimal.valueOf( |
| scheduledAction.actionPeriod |
| .getDuration() |
| .getSeconds()); |
| final Optional<BigDecimal> accrualPeriodDuration = Optional.ofNullable(chargeDefinition.getAccrueAction()) |
| .flatMap(action -> ScheduledActionHelpers.getAccrualPeriodDurationForAction(Action.valueOf(action))) |
| .map(Duration::getSeconds) |
| .map(BigDecimal::valueOf); |
| |
| final BigDecimal chargeDefinitionCycleSizeUnitDuration |
| = BigDecimal.valueOf( |
| Optional.ofNullable(chargeDefinition.getForCycleSizeUnit()) |
| .orElse(ChronoUnit.YEARS) |
| .getDuration() |
| .getSeconds()); |
| |
| final BigDecimal accrualPeriodsInCycle = chargeDefinitionCycleSizeUnitDuration.divide( |
| accrualPeriodDuration.orElse(actionPeriodDuration), precision, BigDecimal.ROUND_HALF_EVEN); |
| final int accrualPeriodsInActionPeriod = actionPeriodDuration.divide( |
| accrualPeriodDuration.orElse(actionPeriodDuration), precision, BigDecimal.ROUND_HALF_EVEN) |
| .intValueExact(); |
| final BigDecimal rateForAccrualPeriod = chargeDefinition.getAmount().divide( |
| accrualPeriodsInCycle, precision, BigDecimal.ROUND_HALF_EVEN); |
| return createCompoundedRate(rateForAccrualPeriod, accrualPeriodsInActionPeriod, precision); |
| } |
| |
| static BigDecimal createCompoundedRate(final BigDecimal interestRate, final int periodCount, final int precision) |
| { |
| return Stream.generate(() -> interestRate).limit(periodCount).collect(RateCollectors.compound(precision)); |
| } |
| } |