Places in code with 6 or more lines that are exactly the same.
Intro
- For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
- Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
- You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
- To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:
- Avoid Repetition, MartinFlower.com (IEEE Software article)
- Refactoring duplicated code, sourcemaking.com
- Beck Design Rules, MartinFowler.com
- DRY (Don't Repeat Yourself) Principle, Wikipedia
- The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
- Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:
- "Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"
- Reducing Coupling, MartinFlower.com (IEEE Software article):
- "There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."
Duplication Overall
- 30% duplication:
- 15,291 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 4,616 duplicated lines
- 17,928 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 30 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api |  FinancesApi.javaFinancesApi.java |
340:379 (10%)475:514 (10%) | view |
| 28 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
448:486 (5%)940:978 (5%) | view |
| 27 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
820:857 (5%)945:982 (5%) | view |
| 27 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
324:361 (5%)580:617 (5%) | view |
| 27 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | ReportsApi.javaReportsApi.java |
71:108 (4%)581:618 (4%) | view |
| 27 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | ReportsApi.javaReportsApi.java |
199:236 (4%)837:874 (4%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
330:365 (5%)455:490 (5%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | ReportsApi.javaReportsApi.java |
77:112 (4%)205:240 (4%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | FinancesApi.javaFinancesApi.java |
74:109 (9%)344:379 (9%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | FinancesApi.javaFinancesApi.java |
74:109 (9%)479:514 (9%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaSellersApi.java |
707:742 (5%)70:105 (27%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | ReportsApi.javaReportsApi.java |
715:750 (4%)843:878 (4%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
707:742 (5%)947:982 (5%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
707:742 (5%)822:857 (5%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | ReportsApi.javaReportsApi.java |
587:622 (4%)715:750 (4%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaSellersApi.java |
947:982 (5%)70:105 (27%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | ReportsApi.javaReportsApi.java |
587:622 (4%)843:878 (4%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | FinancesApi.javaFinancesApi.java |
74:109 (9%)211:246 (9%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaNotificationsApi.java |
75:110 (5%)199:234 (5%) | view |
| 26 | x 2 | lambda/src/main/java/cn/...ws/rp/spapi/clients/apilambda/src/main/java/cn/...ws/rp/spapi/clients/api | NotificationsApi.javaSellersApi.java |
822:857 (5%)70:105 (27%) | view |
Duplicated Units
The list of top 9 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 8 | x 51 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model... | OrderList.javaTDSReimbursementEventList.javaAttributeSetList.javaLoanServicingEventList.javaTrialShipmentEventList.javaReportList.javaNetworkComminglingTransactionEventLis...PaymentMethodDetailItemList.javaListOfCategories.javaMarketplaceParticipationList.java... |
30:38 29:37 31:39 29:37 29:37 26:34 29:37 29:37 29:37 29:37 ... | view |
| 8 | x 2 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model | OrderItemsList.javaOrderItemsBuyerInfoList.java |
113:122 113:122 | view |
| 7 | x 24 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model... | GetReportSchedulesResponse.javaListCatalogCategoriesResponse.javaGetSubscriptionResponse.javaGetOrderResponse.javaGetReportScheduleResponse.javaListCatalogItemsResponse.javaGetDestinationResponse.javaListFinancialEventsResponse.javaCreateReportResponse.javaGetMarketplaceParticipationsResponse....... |
91:99 97:105 91:99 91:99 91:99 97:105 91:99 91:99 91:99 91:99 ... | view |
| 7 | x 2 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model | DestinationResource.javaDestinationResourceSpecification.java |
91:99 92:100 | view |
| 6 | x 5 | lambda/src/main/java/cn/.../rp/spapi/dynamodb/impllambda/src/main/java/cn/.../rp/spapi/dynamodb/impllambda/src/main/java/cn/.../rp/spapi/dynamodb/impllambda/src/main/java/cn/.../rp/spapi/dynamodb/impllambda/src/main/java/cn/.../rp/spapi/dynamodb/impl | FinancesDao.javaReportsDao.javaSpApiSecretDao.javaSpApiTaskDao.javaOrdersDao.java |
93:100 58:65 93:100 124:131 65:72 | view |
| 6 | x 2 | lambda/src/main/java/cn/...on/aws/rp/spapi/clientslambda/src/main/java/cn/...on/aws/rp/spapi/clients | JSON.javaJSON.java |
188:194 232:238 | view |
| 6 | x 51 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model... | OrderList.javaTDSReimbursementEventList.javaAttributeSetList.javaLoanServicingEventList.javaTrialShipmentEventList.javaReportList.javaNetworkComminglingTransactionEventLis...PaymentMethodDetailItemList.javaListOfCategories.javaMarketplaceParticipationList.java... |
47:53 46:52 48:54 46:52 46:52 43:49 46:52 46:52 46:52 46:52 ... | view |
| 6 | x 2 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model | ReportSchedule.javaReport.java |
91:97 125:131 | view |
| 6 | x 4 | lambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/modellambda/src/main/java/cn/.../rp/spapi/clients/model | CancelReportScheduleResponse.javaDeleteSubscriptionByIdResponse.javaDeleteDestinationResponse.javaCancelReportResponse.java |
69:76 69:76 69:76 69:76 | view |