FINERACT-2326: Refractor redundant and some deprecated code as per new Java 21 style

fineract-charge/src/main/java/org/apache/fineract/portfolio/charge/domain/ChargeCalculationType.java

@@ -70,25 +70,14 @@ public enum ChargeCalculationType {
     }
 
     public static ChargeCalculationType fromInt(final Integer chargeCalculation) {
-        ChargeCalculationType chargeCalculationType = ChargeCalculationType.INVALID;
-        switch (chargeCalculation) {
-            case 1:
-                chargeCalculationType = FLAT;
-            break;
-            case 2:
-                chargeCalculationType = PERCENT_OF_AMOUNT;
-            break;
-            case 3:
-                chargeCalculationType = PERCENT_OF_AMOUNT_AND_INTEREST;
-            break;
-            case 4:
-                chargeCalculationType = PERCENT_OF_INTEREST;
-            break;
-            case 5:
-                chargeCalculationType = PERCENT_OF_DISBURSEMENT_AMOUNT;
-            break;
-        }
-        return chargeCalculationType;
+        return switch (chargeCalculation) {
+            case 1 -> FLAT;
+            case 2 -> PERCENT_OF_AMOUNT;
+            case 3 -> PERCENT_OF_AMOUNT_AND_INTEREST;
+            case 4 -> PERCENT_OF_INTEREST;
+            case 5 -> PERCENT_OF_DISBURSEMENT_AMOUNT;
+            default -> INVALID;
+        };
     }
 
     public boolean isPercentageOfAmount() {

fineract-client-feign/src/main/java/org/apache/fineract/client/util/FeignParts.java

@@ -56,36 +56,21 @@ public final class FeignParts {
         }
         String ext = fileName.substring(dotPos + 1).toLowerCase();
 
-        switch (ext) {
-            case "jpg":
-            case "jpeg":
-                return "image/jpeg";
-            case "png":
-                return "image/png";
-            case "tif":
-            case "tiff":
-                return "image/tiff";
-            case "gif":
-                return "image/gif";
-            case "pdf":
-                return "application/pdf";
-            case "docx":
-                return "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
-            case "doc":
-                return "application/msword";
-            case "xlsx":
-                return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
-            case "xls":
-                return "application/vnd.ms-excel";
-            case "odt":
-                return "application/vnd.oasis.opendocument.text";
-            case "ods":
-                return "application/vnd.oasis.opendocument.spreadsheet";
-            case "txt":
-                return "text/plain";
-            default:
-                return "application/octet-stream";
-        }
+        return switch (ext) {
+            case "jpg", "jpeg" -> "image/jpeg";
+            case "png" -> "image/png";
+            case "tif", "tiff" -> "image/tiff";
+            case "gif" -> "image/gif";
+            case "pdf" -> "application/pdf";
+            case "docx" -> "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
+            case "doc" -> "application/msword";
+            case "xlsx" -> "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
+            case "xls" -> "application/vnd.ms-excel";
+            case "odt" -> "application/vnd.oasis.opendocument.text";
+            case "ods" -> "application/vnd.oasis.opendocument.spreadsheet";
+            case "txt" -> "text/plain";
+            default -> "application/octet-stream";
+        };
     }
 
     /**

fineract-core/src/main/java/org/apache/fineract/infrastructure/core/exceptionmapper/DefaultExceptionMapper.java

@@ -24,8 +24,8 @@ import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
 import jakarta.ws.rs.ext.ExceptionMapper;
 import java.util.Map;
+import java.util.Objects;
 import lombok.extern.slf4j.Slf4j;
-import org.apache.commons.lang3.ObjectUtils;
 import org.apache.fineract.infrastructure.core.exception.ErrorHandler;
 import org.springframework.context.annotation.Scope;
 import org.springframework.stereotype.Component;
@@ -43,8 +43,9 @@ public class DefaultExceptionMapper implements FineractExceptionMapper, Exceptio
     @Override
     public Response toResponse(RuntimeException exception) {
         log.warn("Exception occurred", ErrorHandler.findMostSpecificException(exception));
+
         return Response.status(SC_INTERNAL_SERVER_ERROR)
-                .entity(Map.of("Exception", ObjectUtils.defaultIfNull(exception.getMessage(), "No error message available")))
+                .entity(Map.of("Exception", Objects.requireNonNullElse(exception.getMessage(), "No error message available")))
                 .type(MediaType.APPLICATION_JSON).build();
     }
 }

fineract-core/src/main/java/org/apache/fineract/infrastructure/core/service/database/DataSourcePerTenantServiceFactory.java

@@ -98,9 +98,8 @@ public class DataSourcePerTenantServiceFactory {
 
         // https://github.com/brettwooldridge/HikariCP/wiki/MBean-(JMX)-Monitoring-and-Management
         config.setRegisterMbeans(true);
-        meterRegistry.ifPresent(registry -> {
-            config.setMetricsTrackerFactory(new TenantConnectionPoolMetricsTrackerFactory(tenant.getTenantIdentifier(), registry));
-        });
+        meterRegistry.ifPresent(registry -> config
+                .setMetricsTrackerFactory(new TenantConnectionPoolMetricsTrackerFactory(tenant.getTenantIdentifier(), registry)));
 
         // https://github.com/brettwooldridge/HikariCP/wiki/MySQL-Configuration
         // These are the properties for each Tenant DB; the same configuration

fineract-core/src/main/java/org/apache/fineract/portfolio/common/domain/DaysInMonthType.java

@@ -59,15 +59,11 @@ public enum DaysInMonthType {
     public static DaysInMonthType fromInt(final Integer type) {
         DaysInMonthType repaymentFrequencyType = DaysInMonthType.INVALID;
         if (type != null) {
-            switch (type) {
-                case 1:
-                    repaymentFrequencyType = DaysInMonthType.ACTUAL;
-                break;
-                case 30:
-                    repaymentFrequencyType = DaysInMonthType.DAYS_30;
-                break;
-
-            }
+            repaymentFrequencyType = switch (type) {
+                case 1 -> DaysInMonthType.ACTUAL;
+                case 30 -> DaysInMonthType.DAYS_30;
+                default -> repaymentFrequencyType;
+            };
         }
         return repaymentFrequencyType;
     }

fineract-core/src/main/java/org/apache/fineract/portfolio/common/domain/DaysInYearType.java

@@ -63,20 +63,13 @@ public enum DaysInYearType {
     public static DaysInYearType fromInt(final Integer type) {
         DaysInYearType repaymentFrequencyType = DaysInYearType.INVALID;
         if (type != null) {
-            switch (type) {
-                case 1:
-                    repaymentFrequencyType = DaysInYearType.ACTUAL;
-                break;
-                case 360:
-                    repaymentFrequencyType = DaysInYearType.DAYS_360;
-                break;
-                case 364:
-                    repaymentFrequencyType = DaysInYearType.DAYS_364;
-                break;
-                case 365:
-                    repaymentFrequencyType = DaysInYearType.DAYS_365;
-                break;
-            }
+            repaymentFrequencyType = switch (type) {
+                case 1 -> DaysInYearType.ACTUAL;
+                case 360 -> DaysInYearType.DAYS_360;
+                case 364 -> DaysInYearType.DAYS_364;
+                case 365 -> DaysInYearType.DAYS_365;
+                default -> repaymentFrequencyType;
+            };
         }
         return repaymentFrequencyType;
     }

fineract-loan/src/main/java/org/apache/fineract/portfolio/delinquency/helper/DelinquencyEffectivePauseHelperImpl.java

@@ -42,7 +42,7 @@ public class DelinquencyEffectivePauseHelperImpl implements DelinquencyEffective
                 .collect(Collectors.groupingBy(LoanDelinquencyAction::getAction));
         List<LoanDelinquencyActionData> effective = new ArrayList<>();
         List<LoanDelinquencyAction> pauses = partitioned.get(DelinquencyAction.PAUSE);
-        if (pauses != null && pauses.size() > 0) {
+        if (pauses != null && !pauses.isEmpty()) {
             for (LoanDelinquencyAction loanDelinquencyAction : pauses) {
                 Optional<LoanDelinquencyAction> resume = findMatchingResume(loanDelinquencyAction, partitioned.get(RESUME));
                 LoanDelinquencyActionData loanDelinquencyActionData = new LoanDelinquencyActionData(loanDelinquencyAction);
@@ -91,7 +91,7 @@ public class DelinquencyEffectivePauseHelperImpl implements DelinquencyEffective
     }
 
     private Optional<LoanDelinquencyAction> findMatchingResume(LoanDelinquencyAction pause, List<LoanDelinquencyAction> resumes) {
-        if (resumes != null && resumes.size() > 0) {
+        if (resumes != null && !resumes.isEmpty()) {
             for (LoanDelinquencyAction resume : resumes) {
                 if (!pause.getStartDate().isAfter(resume.getStartDate()) && !resume.getStartDate().isAfter(pause.getEndDate())) {
                     return Optional.of(resume);

fineract-loan/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyReadPlatformServiceImpl.java

@@ -337,11 +337,9 @@ public class DelinquencyReadPlatformServiceImpl implements DelinquencyReadPlatfo
                 isCurrentDateBeforeInstallmentAndLoanPeriod = DateUtils.isEqual(currentBusinessDate, installment.getDueDate())
                         && DateUtils.isBefore(currentBusinessDate, expectedMaturityDate);
             }
-            if (isCurrentDateBeforeInstallmentAndLoanPeriod) {
-                if (installment.isNotFullyPaidOff()) {
-                    nextUnpaidInstallmentDate = installment.getDueDate();
-                    break;
-                }
+            if (isCurrentDateBeforeInstallmentAndLoanPeriod && installment.isNotFullyPaidOff()) {
+                nextUnpaidInstallmentDate = installment.getDueDate();
+                break;
             }
         }
         return nextUnpaidInstallmentDate;

fineract-loan/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyWritePlatformServiceHelper.java

@@ -127,7 +127,7 @@ public class DelinquencyWritePlatformServiceHelper {
                 changes.put("current", loanDelinquencyTag.getDelinquencyRange());
             }
         }
-        if (loanDelinquencyTagHistory.size() > 0) {
+        if (!loanDelinquencyTagHistory.isEmpty()) {
             this.loanDelinquencyTagRepository.saveAllAndFlush(loanDelinquencyTagHistory);
             // if installment level delinquency is enabled event will be raised at installment level calculation, no
             // need to raise the event here
@@ -173,10 +173,10 @@ public class DelinquencyWritePlatformServiceHelper {
     private void removeDelinquencyTagsForNonExistingInstallments(Long loanId) {
         List<LoanInstallmentDelinquencyTag> currentLoanInstallmentDelinquencyTags = loanInstallmentDelinquencyTagRepository
                 .findByLoanId(loanId);
-        if (currentLoanInstallmentDelinquencyTags != null && currentLoanInstallmentDelinquencyTags.size() > 0) {
+        if (currentLoanInstallmentDelinquencyTags != null && !currentLoanInstallmentDelinquencyTags.isEmpty()) {
             List<Long> loanInstallmentTagsForDelete = currentLoanInstallmentDelinquencyTags.stream()
                     .filter(tag -> tag.getInstallment() == null).map(tag -> tag.getId()).toList();
-            if (loanInstallmentTagsForDelete.size() > 0) {
+            if (!loanInstallmentTagsForDelete.isEmpty()) {
                 loanInstallmentDelinquencyTagRepository.deleteAllLoanInstallmentsTagsByIds(loanInstallmentTagsForDelete);
             }
         }
@@ -260,7 +260,7 @@ public class DelinquencyWritePlatformServiceHelper {
 
         }
 
-        if (installmentDelinquencyTags.size() > 0) {
+        if (!installmentDelinquencyTags.isEmpty()) {
             loanInstallmentDelinquencyTagRepository.saveAllAndFlush(installmentDelinquencyTags);
         }
         return isDelinquencyRangeChanged;

fineract-loan/src/main/java/org/apache/fineract/portfolio/delinquency/service/DelinquencyWritePlatformServiceImpl.java

@@ -291,7 +291,7 @@ public class DelinquencyWritePlatformServiceImpl implements DelinquencyWritePlat
     @Override
     public void cleanLoanDelinquencyTags(Loan loan) {
         List<LoanDelinquencyTagHistory> loanDelinquencyTags = this.loanDelinquencyTagRepository.findByLoan(loan);
-        if (loanDelinquencyTags != null && loanDelinquencyTags.size() > 0) {
+        if (loanDelinquencyTags != null && !loanDelinquencyTags.isEmpty()) {
             this.loanDelinquencyTagRepository.deleteAll(loanDelinquencyTags);
         }
     }
@@ -362,9 +362,7 @@ public class DelinquencyWritePlatformServiceImpl implements DelinquencyWritePlat
 
     private void setDelinquencyBucketMappings(DelinquencyBucket delinquencyBucket, DelinquencyBucketData data) {
         List<Long> rangeIds = new ArrayList<>();
-        data.getRanges().forEach(dataRange -> {
-            rangeIds.add(dataRange.getId());
-        });
+        data.getRanges().forEach(dataRange -> rangeIds.add(dataRange.getId()));
 
         List<DelinquencyRange> ranges = repositoryRange.findAllById(rangeIds);
         validateDelinquencyRanges(ranges);
@@ -383,11 +381,9 @@ public class DelinquencyWritePlatformServiceImpl implements DelinquencyWritePlat
 
         DelinquencyRange prevDelinquencyRange = null;
         for (DelinquencyRange delinquencyRange : ranges) {
-            if (prevDelinquencyRange != null) {
-                if (isOverlapped(prevDelinquencyRange, delinquencyRange)) {
-                    final String errorMessage = "The delinquency ranges age days values are overlaped";
-                    throw new DelinquencyBucketAgesOverlapedException(errorMessage, prevDelinquencyRange, delinquencyRange);
-                }
+            if (prevDelinquencyRange != null && isOverlapped(prevDelinquencyRange, delinquencyRange)) {
+                final String errorMessage = "The delinquency ranges age days values are overlaped";
+                throw new DelinquencyBucketAgesOverlapedException(errorMessage, prevDelinquencyRange, delinquencyRange);
             }
             prevDelinquencyRange = delinquencyRange;
         }

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/DefaultLoanLifecycleStateMachine.java

@@ -153,7 +153,7 @@ public class DefaultLoanLifecycleStateMachine implements LoanLifecycleStateMachi
                 }
             break;
             case LOAN_CHARGE_PAYMENT:
-            case LOAN_REPAYMENT_OR_WAIVER:
+            case LOAN_REPAYMENT_OR_WAIVER, LOAN_CHARGEBACK:
                 if (anyOfAllowedWhenComingFrom(from, LoanStatus.CLOSED_OBLIGATIONS_MET, LoanStatus.OVERPAID)) {
                     newState = activeTransition();
                 }
@@ -217,11 +217,6 @@ public class DefaultLoanLifecycleStateMachine implements LoanLifecycleStateMachi
                     newState = activeTransition();
                 }
             break;
-            case LOAN_CHARGEBACK:
-                if (anyOfAllowedWhenComingFrom(from, LoanStatus.CLOSED_OBLIGATIONS_MET, LoanStatus.OVERPAID)) {
-                    newState = activeTransition();
-                }
-            break;
             case LOAN_CHARGE_ADJUSTMENT:
                 if (from.hasStateOf(LoanStatus.CLOSED_OBLIGATIONS_MET)) {
                     newState = overpaidTransition();

fineract-progressive-loan/src/main/java/org/apache/fineract/portfolio/loanproduct/domain/CreditAllocationsValidator.java

@@ -86,7 +86,7 @@ public class CreditAllocationsValidator {
     }
 
     private boolean hasLoanProductCreditAllocationRule(List<LoanProductCreditAllocationRule> rules) {
-        return rules != null && rules.size() > 0;
+        return rules != null && !rules.isEmpty();
     }
 
     private void raiseValidationError(String globalisationMessageCode, String msg) {

fineract-progressive-loan/src/test/java/org/apache/fineract/portfolio/loanproduct/domain/CreditAllocationsJsonParserTest.java

@@ -94,9 +94,7 @@ public class CreditAllocationsJsonParserTest {
 
     private static List<Pair<Integer, AllocationType>> createAllocationTypeList() {
         AtomicInteger i = new AtomicInteger(1);
-        List<Pair<Integer, AllocationType>> list = EnumSet.allOf(AllocationType.class).stream().map(p -> Pair.of(i.getAndIncrement(), p))
-                .toList();
-        return list;
+        return EnumSet.allOf(AllocationType.class).stream().map(p -> Pair.of(i.getAndIncrement(), p)).toList();
     }
 
     public Map<String, Object> createCreditAllocationEntry(String transactionType, List<String> orderedRules) {
@@ -117,9 +115,8 @@ public class CreditAllocationsJsonParserTest {
     private JsonCommand createJsonCommand(Map<String, Object> jsonMap) throws JsonProcessingException {
         ObjectMapper objectMapper = new ObjectMapper();
         String json = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonMap);
-        JsonCommand command = JsonCommand.from(json, JsonParser.parseString(json), fromJsonHelper, null, 1L, 2L, 3L, 4L, null, null, null,
-                null, null, null, null, null, null);
-        return command;
+        return JsonCommand.from(json, JsonParser.parseString(json), fromJsonHelper, null, 1L, 2L, 3L, 4L, null, null, null, null, null,
+                null, null, null, null);
     }
 
 }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/accountnumberformat/domain/EntityAccountType.java

@@ -68,8 +68,7 @@ public enum EntityAccountType {
     }
 
     public static EntityAccountType fromInt(final int i) {
-        final EntityAccountType type = intToEnumMap.get(Integer.valueOf(i));
-        return type;
+        return intToEnumMap.get(i);
     }
 
     public static int getMinValue() {
@@ -82,7 +81,7 @@ public enum EntityAccountType {
 
     @Override
     public String toString() {
-        return name().toString();
+        return name();
     }
 
     public boolean isClientAccount() {

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/data/EmailConfigurationValidator.java

@@ -94,9 +94,7 @@ public final class EmailConfigurationValidator {
 
     public boolean isValidEmail(String email) {
         // this is the easiest check
-        if (email == null) {
-            return false;
-        } else if (email.endsWith(".")) {
+        if (email == null || email.endsWith(".")) {
             return false;
         }
 
@@ -104,10 +102,6 @@ public final class EmailConfigurationValidator {
         Matcher emailMatcher = EMAIL_PATTERN.matcher(email);
 
         // check if the Matcher matches the email pattern
-        if (!emailMatcher.matches()) {
-            return false;
-        }
-
-        return true;
+        return emailMatcher.matches();
     }
 }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/data/EmailDataValidator.java

@@ -262,11 +262,7 @@ public final class EmailDataValidator {
         Matcher emailMatcher = EMAIL_PATTERN.matcher(email);
 
         // check if the Matcher matches the email pattern
-        if (!emailMatcher.matches()) {
-            return false;
-        }
-
-        return true;
+        return emailMatcher.matches();
     }
 
     /**

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/domain/EmailCampaignStatus.java

@@ -36,17 +36,12 @@ public enum EmailCampaignStatus {
     public static EmailCampaignStatus fromInt(final Integer statusValue) {
 
         EmailCampaignStatus enumeration = EmailCampaignStatus.INVALID;
-        switch (statusValue) {
-            case 100:
-                enumeration = EmailCampaignStatus.PENDING;
-            break;
-            case 300:
-                enumeration = EmailCampaignStatus.ACTIVE;
-            break;
-            case 600:
-                enumeration = EmailCampaignStatus.CLOSED;
-            break;
-        }
+        enumeration = switch (statusValue) {
+            case 100 -> EmailCampaignStatus.PENDING;
+            case 300 -> EmailCampaignStatus.ACTIVE;
+            case 600 -> EmailCampaignStatus.CLOSED;
+            default -> enumeration;
+        };
         return enumeration;
     }
 

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/domain/EmailCampaignType.java

@@ -41,19 +41,12 @@ public enum EmailCampaignType {
     }
 
     public static EmailCampaignType fromInt(final Integer typeValue) {
-        EmailCampaignType type = null;
-        switch (typeValue) {
-            case 1:
-                type = DIRECT;
-            break;
-            case 2:
-                type = SCHEDULE;
-            break;
-            case 3:
-                type = TRIGGERED;
-            break;
-        }
-        return type;
+        return switch (typeValue) {
+            case 1 -> DIRECT;
+            case 2 -> SCHEDULE;
+            case 3 -> TRIGGERED;
+            default -> null;
+        };
     }
 
     public boolean isDirect() {

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/domain/EmailMessageStatusType.java

@@ -32,20 +32,13 @@ public enum EmailMessageStatusType {
     public static EmailMessageStatusType fromInt(final Integer statusValue) {
 
         EmailMessageStatusType enumeration = EmailMessageStatusType.INVALID;
-        switch (statusValue) {
-            case 100:
-                enumeration = EmailMessageStatusType.PENDING;
-            break;
-            case 200:
-                enumeration = EmailMessageStatusType.SENT;
-            break;
-            case 300:
-                enumeration = EmailMessageStatusType.DELIVERED;
-            break;
-            case 400:
-                enumeration = EmailMessageStatusType.FAILED;
-            break;
-        }
+        enumeration = switch (statusValue) {
+            case 100 -> EmailMessageStatusType.PENDING;
+            case 200 -> EmailMessageStatusType.SENT;
+            case 300 -> EmailMessageStatusType.DELIVERED;
+            case 400 -> EmailMessageStatusType.FAILED;
+            default -> enumeration;
+        };
         return enumeration;
     }
 

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/service/EmailCampaignDomainServiceImpl.java

@@ -117,8 +117,6 @@ public class EmailCampaignDomainServiceImpl implements EmailCampaignDomainServic
     }
 
     private List<EmailCampaign> retrieveEmailCampaigns(String paramValue) {
-        List<EmailCampaign> emailCampaigns = emailCampaignRepository.findActiveEmailCampaigns("%" + paramValue + "%",
-                SmsCampaignTriggerType.TRIGGERED.getValue());
-        return emailCampaigns;
+        return emailCampaignRepository.findActiveEmailCampaigns("%" + paramValue + "%", SmsCampaignTriggerType.TRIGGERED.getValue());
     }
 }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/campaigns/email/service/EmailMessageJobEmailServiceImpl.java

@@ -62,7 +62,7 @@ public final class EmailMessageJobEmailServiceImpl implements EmailMessageJobEma
             mimeMessageHelper.setText(emailMessageWithAttachmentData.getText(), true);
             mimeMessageHelper.setSubject(emailMessageWithAttachmentData.getSubject());
             final List<File> attachments = emailMessageWithAttachmentData.getAttachments();
-            if (attachments != null && attachments.size() > 0) {
+            if (attachments != null && !attachments.isEmpty()) {
                 for (final File attachment : attachments) {
                     if (attachment != null) {
                         mimeMessageHelper.addAttachment(attachment.getName(), attachment);

fineract-provider/src/main/java/org/apache/fineract/infrastructure/dataqueries/handler/DeleteDatatableCommandHandler.java

@@ -36,7 +36,7 @@ public class DeleteDatatableCommandHandler implements NewCommandSourceHandler {
     @Transactional
     @Override
     public CommandProcessingResult processCommand(final JsonCommand command) {
-        final String datatableName = command.getUrl().replaceAll("/datatables/", "");
+        final String datatableName = command.getUrl().replace("/datatables/", "");
         datatableWriteService.deleteDatatable(datatableName);
         return new CommandProcessingResultBuilder().withCommandId(command.commandId()).withResourceIdAsString(datatableName).build();
     }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/dataqueries/service/EntityDatatableChecksReadPlatformServiceImpl.java

@@ -121,10 +121,10 @@ public class EntityDatatableChecksReadPlatformServiceImpl implements EntityDatat
             tableRequiredBeforeAction = this.entityDatatableChecksRepository.findByEntityStatusAndProduct(entity, status, productId);
         }
 
-        if (tableRequiredBeforeAction == null || tableRequiredBeforeAction.size() < 1) {
+        if (tableRequiredBeforeAction == null || tableRequiredBeforeAction.isEmpty()) {
             tableRequiredBeforeAction = this.entityDatatableChecksRepository.findByEntityStatusAndNoProduct(entity, status);
         }
-        if (tableRequiredBeforeAction != null && tableRequiredBeforeAction.size() > 0) {
+        if (tableRequiredBeforeAction != null && !tableRequiredBeforeAction.isEmpty()) {
             List<DatatableData> ret = new ArrayList<>();
             for (EntityDatatableChecks t : tableRequiredBeforeAction) {
                 ret.add(this.datatableReadService.retrieveDatatable(t.getDatatableName()));

fineract-provider/src/main/java/org/apache/fineract/portfolio/common/service/DropdownReadPlatformServiceImpl.java

@@ -37,34 +37,28 @@ public class DropdownReadPlatformServiceImpl implements DropdownReadPlatformServ
 
     @Override
     public List<EnumOptionData> retrievePeriodFrequencyTypeOptions() {
-        final List<EnumOptionData> loanTermFrequencyOptions = Arrays.asList(termFrequencyType(PeriodFrequencyType.DAYS, "frequency"),
+        return Arrays.asList(termFrequencyType(PeriodFrequencyType.DAYS, "frequency"),
                 termFrequencyType(PeriodFrequencyType.WEEKS, "frequency"), termFrequencyType(PeriodFrequencyType.MONTHS, "frequency"),
                 termFrequencyType(PeriodFrequencyType.YEARS, "frequency"), termFrequencyType(PeriodFrequencyType.WHOLE_TERM, "frequency"));
-        return loanTermFrequencyOptions;
     }
 
     @Override
     public List<EnumOptionData> retrieveConditionTypeOptions() {
-        final List<EnumOptionData> loanTermFrequencyOptions = Arrays.asList(conditionType(ConditionType.EQUAL, "condition"),
-                conditionType(ConditionType.NOT_EQUAL, "condition"), conditionType(ConditionType.GRETERTHAN, "condition"),
-                conditionType(ConditionType.LESSTHAN, "condition"));
-        return loanTermFrequencyOptions;
+        return Arrays.asList(conditionType(ConditionType.EQUAL, "condition"), conditionType(ConditionType.NOT_EQUAL, "condition"),
+                conditionType(ConditionType.GRETERTHAN, "condition"), conditionType(ConditionType.LESSTHAN, "condition"));
     }
 
     @Override
     public List<EnumOptionData> retrieveDaysInMonthTypeOptions() {
 
-        final List<EnumOptionData> daysInMonthTypeOptions = Arrays.asList(daysInMonthType(DaysInMonthType.ACTUAL),
-                daysInMonthType(DaysInMonthType.DAYS_30));
-        return daysInMonthTypeOptions;
+        return Arrays.asList(daysInMonthType(DaysInMonthType.ACTUAL), daysInMonthType(DaysInMonthType.DAYS_30));
     }
 
     @Override
     public List<EnumOptionData> retrieveDaysInYearTypeOptions() {
 
-        final List<EnumOptionData> daysInYearTypeOptions = Arrays.asList(daysInYearType(DaysInYearType.ACTUAL),
-                daysInYearType(DaysInYearType.DAYS_360), daysInYearType(DaysInYearType.DAYS_364), daysInYearType(DaysInYearType.DAYS_365));
-        return daysInYearTypeOptions;
+        return Arrays.asList(daysInYearType(DaysInYearType.ACTUAL), daysInYearType(DaysInYearType.DAYS_360),
+                daysInYearType(DaysInYearType.DAYS_364), daysInYearType(DaysInYearType.DAYS_365));
     }
 
 }

fineract-provider/src/main/java/org/apache/fineract/portfolio/savings/domain/DepositAccountAssembler.java

@@ -440,9 +440,7 @@ public class DepositAccountAssembler {
 
         final DepositRecurringDetail depositRecurringDetail = DepositRecurringDetail.createFrom(isMandatoryDeposit, allowWithdrawal,
                 adjustAdvanceTowardsFuturePayments);
-        final DepositAccountRecurringDetail depositAccountRecurringDetail = DepositAccountRecurringDetail.createNew(recurringDepositAmount,
-                depositRecurringDetail, null, isCalendarInherited);
-        return depositAccountRecurringDetail;
+        return DepositAccountRecurringDetail.createNew(recurringDepositAmount, depositRecurringDetail, null, isCalendarInherited);
     }
 
     public Collection<SavingsAccountTransactionDTO> assembleBulkMandatorySavingsAccountTransactionDTOs(final JsonCommand command,

fineract-provider/src/main/java/org/apache/fineract/portfolio/savings/service/DepositAccountWritePlatformServiceJpaRepositoryImpl.java

@@ -747,16 +747,12 @@ public class DepositAccountWritePlatformServiceJpaRepositoryImpl implements Depo
 
     private void checkClientOrGroupActive(final SavingsAccount account) {
         final Client client = account.getClient();
-        if (client != null) {
-            if (client.isNotActive()) {
-                throw new ClientNotActiveException(client.getId());
-            }
+        if (client != null && client.isNotActive()) {
+            throw new ClientNotActiveException(client.getId());
         }
         final Group group = account.group();
-        if (group != null) {
-            if (group.isNotActive()) {
-                throw new GroupNotActiveException(group.getId());
-            }
+        if (group != null && group.isNotActive()) {
+            throw new GroupNotActiveException(group.getId());
         }
     }
 

fineract-provider/src/main/java/org/apache/fineract/portfolio/savings/service/DepositApplicationProcessWritePlatformServiceJpaRepositoryImpl.java

@@ -729,19 +729,17 @@ public class DepositApplicationProcessWritePlatformServiceJpaRepositoryImpl impl
 
     private void checkClientOrGroupActive(final SavingsAccount account) {
         final Client client = account.getClient();
-        if (client != null) {
-            if (client.isNotActive()) {
-                throw new ClientNotActiveException(client.getId());
-            }
+        if (client != null && client.isNotActive()) {
+            throw new ClientNotActiveException(client.getId());
         }
+
         final Group group = account.group();
-        if (group != null) {
-            if (group.isNotActive()) {
-                if (group.isCenter()) {
-                    throw new CenterNotActiveException(group.getId());
-                }
-                throw new GroupNotActiveException(group.getId());
+        if (group != null && group.isNotActive()) {
+            if (group.isCenter()) {
+                throw new CenterNotActiveException(group.getId());
             }
+            throw new GroupNotActiveException(group.getId());
         }
+
     }
 }

fineract-provider/src/main/java/org/apache/fineract/portfolio/self/device/api/DeviceRegistrationApiResource.java

@@ -67,8 +67,7 @@ public class DeviceRegistrationApiResource {
         Long clientId = json.get(DeviceRegistrationApiConstants.clientIdParamName).getAsLong();
         String registrationId = json.get(DeviceRegistrationApiConstants.registrationIdParamName).getAsString();
         DeviceRegistration deviceRegistration = this.deviceRegistrationWritePlatformService.registerDevice(clientId, registrationId);
-        String response = gson.toJson(deviceRegistration.getId());
-        return response;
+        return gson.toJson(deviceRegistration.getId());
     }
 
     @GET
@@ -125,8 +124,7 @@ public class DeviceRegistrationApiResource {
         String registrationId = json.get(DeviceRegistrationApiConstants.registrationIdParamName).getAsString();
         DeviceRegistration deviceRegistration = this.deviceRegistrationWritePlatformService.updateDeviceRegistration(id, clientId,
                 registrationId);
-        String response = gson.toJson(deviceRegistration.getId());
-        return response;
+        return gson.toJson(deviceRegistration.getId());
     }
 
     @DELETE

fineract-savings/src/main/java/org/apache/fineract/portfolio/savings/domain/DepositProductAssembler.java

@@ -299,10 +299,7 @@ public class DepositProductAssembler {
             }
         }
 
-        DepositPreClosureDetail preClosureDetail = DepositPreClosureDetail.createFrom(preClosurePenalApplicable, preClosurePenalInterest,
-                preClosurePenalInterestType);
-
-        return preClosureDetail;
+        return DepositPreClosureDetail.createFrom(preClosurePenalApplicable, preClosurePenalInterest, preClosurePenalInterestType);
     }
 
     public DepositPreClosureDetail assemblePreClosureDetail(final JsonCommand command, DepositPreClosureDetail produPreClosureDetail) {
@@ -334,10 +331,7 @@ public class DepositProductAssembler {
         preClosurePenalInterestType = preClosurePenalInterestOnTypeId == null ? null
                 : PreClosurePenalInterestOnType.fromInt(preClosurePenalInterestOnTypeId);
 
-        DepositPreClosureDetail preClosureDetail1 = DepositPreClosureDetail.createFrom(preClosurePenalApplicable, preClosurePenalInterest,
-                preClosurePenalInterestType);
-
-        return preClosureDetail1;
+        return DepositPreClosureDetail.createFrom(preClosurePenalApplicable, preClosurePenalInterest, preClosurePenalInterestType);
     }
 
     public DepositTermDetail assembleDepositTermDetail(final JsonCommand command) {
@@ -355,10 +349,8 @@ public class DepositProductAssembler {
         final SavingsPeriodFrequencyType inMultiplesOfDepositTermType = (inMultiplesOfDepositTermTypeId == null) ? null
                 : SavingsPeriodFrequencyType.fromInt(inMultiplesOfDepositTermTypeId);
 
-        final DepositTermDetail depositTermDetail = DepositTermDetail.createFrom(minDepositTerm, maxDepositTerm, minDepositTermType,
-                maxDepositTermType, inMultiplesOfDepositTerm, inMultiplesOfDepositTermType);
-
-        return depositTermDetail;
+        return DepositTermDetail.createFrom(minDepositTerm, maxDepositTerm, minDepositTermType, maxDepositTermType,
+                inMultiplesOfDepositTerm, inMultiplesOfDepositTermType);
     }
 
     public DepositTermDetail assembleDepositTermDetail(final JsonCommand command, final DepositTermDetail prodDepositTermDetail) {
@@ -415,10 +407,8 @@ public class DepositProductAssembler {
         final SavingsPeriodFrequencyType inMultiplesOfDepositTermType = (inMultiplesOfDepositTermTypeId == null) ? null
                 : SavingsPeriodFrequencyType.fromInt(inMultiplesOfDepositTermTypeId);
 
-        final DepositTermDetail depositTermDetail = DepositTermDetail.createFrom(minDepositTerm, maxDepositTerm, minDepositTermType,
-                maxDepositTermType, inMultiplesOfDepositTerm, inMultiplesOfDepositTermType);
-
-        return depositTermDetail;
+        return DepositTermDetail.createFrom(minDepositTerm, maxDepositTerm, minDepositTermType, maxDepositTermType,
+                inMultiplesOfDepositTerm, inMultiplesOfDepositTermType);
     }
 
     public DepositRecurringDetail assembleRecurringDetail(final JsonCommand command) {
@@ -438,10 +428,7 @@ public class DepositProductAssembler {
             adjustAdvanceTowardsFuturePayments = false;
         }
 
-        final DepositRecurringDetail depositRecurringDetail = DepositRecurringDetail.createFrom(isMandatoryDeposit, allowWithdrawal,
-                adjustAdvanceTowardsFuturePayments);
-
-        return depositRecurringDetail;
+        return DepositRecurringDetail.createFrom(isMandatoryDeposit, allowWithdrawal, adjustAdvanceTowardsFuturePayments);
     }
 
     public Set<Charge> assembleListOfSavingsProductCharges(final JsonCommand command, final String savingsProductCurrencyCode) {
@@ -510,10 +497,7 @@ public class DepositProductAssembler {
             depositAmount = command.bigDecimalValueOfParameterNamed(depositAmountParamName);
         }
 
-        final DepositProductAmountDetails depositRecurringDetail = new DepositProductAmountDetails(minDepositAmount, depositAmount,
-                maxDepositAmount);
-
-        return depositRecurringDetail;
+        return new DepositProductAmountDetails(minDepositAmount, depositAmount, maxDepositAmount);
     }
 
     public TaxGroup assembleTaxGroup(final JsonCommand command) {