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
- 47% duplication:
- 1,827 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 859 duplicated lines
- 199 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
aws-route53recoverycontrol-routingcontrol/src/main/java/software/amazon/route53recoverycontrol/routingcontrol (40%)
--> aws-route53recoverycontrol-safetyrule/src/main/java/software/amazon/route53recoverycontrol/safetyrule (25%)
302
20 file pairs
details...
aws-route53recoverycontrol-controlpanel/src/main/java/software/amazon/route53recoverycontrol/controlpanel (42%)
--> aws-route53recoverycontrol-routingcontrol/src/main/java/software/amazon/route53recoverycontrol/routingcontrol (40%)
302
20 file pairs
details...
aws-route53recoverycontrol-controlpanel/src/main/java/software/amazon/route53recoverycontrol/controlpanel (38%)
--> aws-route53recoverycontrol-safetyrule/src/main/java/software/amazon/route53recoverycontrol/safetyrule (23%)
273
20 file pairs
details...
aws-route53recoverycontrol-cluster/src/main/java/software/amazon/route53recoverycontrol/cluster (43%)
--> aws-route53recoverycontrol-controlpanel/src/main/java/software/amazon/route53recoverycontrol/controlpanel (33%)
234
16 file pairs
details...
aws-route53recoverycontrol-cluster/src/main/java/software/amazon/route53recoverycontrol/cluster (36%)
--> aws-route53recoverycontrol-routingcontrol/src/main/java/software/amazon/route53recoverycontrol/routingcontrol (26%)
196
16 file pairs
details...
aws-route53recoverycontrol-cluster/src/main/java/software/amazon/route53recoverycontrol/cluster (29%)
--> aws-route53recoverycontrol-safetyrule/src/main/java/software/amazon/route53recoverycontrol/safetyrule (13%)
160
16 file pairs
details...
aws-route53recoverycontrol-routingcontrol (57%)
--> aws-route53recoverycontrol-safetyrule (57%)
64
2 file pairs
details...
aws-route53recoverycontrol-controlpanel (58%)
--> aws-route53recoverycontrol-routingcontrol (57%)
64
2 file pairs
details...
aws-route53recoverycontrol-controlpanel (58%)
--> aws-route53recoverycontrol-safetyrule (57%)
64
2 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| aws-route53recoverycontrol-routingcontrol/src/main/java/software/amazon/route53recoverycontrol/routingcontrol (40%) --> aws-route53recoverycontrol-safetyrule/src/main/java/software/amazon/route53recoverycontrol/safetyrule (25%) |
302 | 20 file pairs | details... |
| aws-route53recoverycontrol-controlpanel/src/main/java/software/amazon/route53recoverycontrol/controlpanel (42%) --> aws-route53recoverycontrol-routingcontrol/src/main/java/software/amazon/route53recoverycontrol/routingcontrol (40%) |
302 | 20 file pairs | details... |
| aws-route53recoverycontrol-controlpanel/src/main/java/software/amazon/route53recoverycontrol/controlpanel (38%) --> aws-route53recoverycontrol-safetyrule/src/main/java/software/amazon/route53recoverycontrol/safetyrule (23%) |
273 | 20 file pairs | details... |
| aws-route53recoverycontrol-cluster/src/main/java/software/amazon/route53recoverycontrol/cluster (43%) --> aws-route53recoverycontrol-controlpanel/src/main/java/software/amazon/route53recoverycontrol/controlpanel (33%) |
234 | 16 file pairs | details... |
| aws-route53recoverycontrol-cluster/src/main/java/software/amazon/route53recoverycontrol/cluster (36%) --> aws-route53recoverycontrol-routingcontrol/src/main/java/software/amazon/route53recoverycontrol/routingcontrol (26%) |
196 | 16 file pairs | details... |
| aws-route53recoverycontrol-cluster/src/main/java/software/amazon/route53recoverycontrol/cluster (29%) --> aws-route53recoverycontrol-safetyrule/src/main/java/software/amazon/route53recoverycontrol/safetyrule (13%) |
160 | 16 file pairs | details... |
| aws-route53recoverycontrol-routingcontrol (57%) --> aws-route53recoverycontrol-safetyrule (57%) |
64 | 2 file pairs | details... |
| aws-route53recoverycontrol-controlpanel (58%) --> aws-route53recoverycontrol-routingcontrol (57%) |
64 | 2 file pairs | details... |
| aws-route53recoverycontrol-controlpanel (58%) --> aws-route53recoverycontrol-safetyrule (57%) |
64 | 2 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 32 | x 2 | aws-route53recoverycontr...ycontrol/routingcontrolaws-route53recoverycontr...overycontrol/safetyrule |  CreateHandler.javaCreateHandler.java |
95:134 (30%)81:120 (24%) | view |
| 24 | x 2 | aws-route53recoverycontrol-routingcontrolaws-route53recoverycontrol-safetyrule |  resource-role.yamlresource-role.yaml |
1:25 (66%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoverycontrol-controlpanelaws-route53recoverycontrol-routingcontrol | resource-role.yamlresource-role.yaml |
1:25 (68%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoverycontrol-clusteraws-route53recoverycontrol-routingcontrol | resource-role.yamlresource-role.yaml |
1:25 (72%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoverycontrol-controlpanelaws-route53recoverycontrol-safetyrule | resource-role.yamlresource-role.yaml |
1:25 (68%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoverycontrol-clusteraws-route53recoverycontrol-safetyrule | resource-role.yamlresource-role.yaml |
1:25 (72%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoverycontrol-clusteraws-route53recoverycontrol-controlpanel | resource-role.yamlresource-role.yaml |
1:25 (72%)1:25 (68%) | view |
| 20 | x 2 | aws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...erycontrol/controlpanel | BaseHandlerStd.javaBaseHandlerStd.java |
10:31 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...overycontrol/safetyrule | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoverycontr...ycontrol/routingcontrolaws-route53recoverycontr...overycontrol/safetyrule | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...overycontrol/safetyrule | BaseHandlerStd.javaBaseHandlerStd.java |
10:31 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...ycontrol/routingcontrol | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...ycontrol/routingcontrol | BaseHandlerStd.javaBaseHandlerStd.java |
10:31 (100%)12:33 (100%) | view |
| 19 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...erycontrol/controlpanel | CreateHandler.javaDeleteHandler.java |
94:119 (21%)54:79 (30%) | view |
| 18 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...ycontrol/routingcontrol | UpdateHandler.javaCreateHandler.java |
71:95 (25%)113:137 (17%) | view |
| 18 | x 2 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...overycontrol/safetyrule | DeleteHandler.javaUpdateHandler.java |
57:81 (25%)85:109 (18%) | view |
| 18 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...erycontrol/controlpanel | DeleteHandler.javaUpdateHandler.java |
58:82 (28%)71:95 (25%) | view |
| 18 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...ycontrol/routingcontrol | DeleteHandler.javaCreateHandler.java |
58:82 (28%)113:137 (17%) | view |
| 17 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...overycontrol/safetyrule | CreateHandler.javaCreateHandler.java |
98:119 (19%)99:120 (12%) | view |
| 17 | x 2 | aws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...overycontrol/safetyrule | DeleteHandler.javaCreateHandler.java |
58:79 (26%)99:120 (12%) | view |
Duplicated Units
The list of top 7 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 17 | x 4 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...ycontrol/routingcontrolaws-route53recoverycontr...ycontrol/routingcontrolaws-route53recoverycontr...ycontrol/routingcontrol | CreateHandler.javaCreateHandler.javaReadHandler.javaUpdateHandler.java |
81:100 95:114 34:53 74:93 | view |
| 17 | x 6 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...ycontrol/routingcontrol | CreateHandler.javaCreateHandler.javaDeleteHandler.javaReadHandler.javaUpdateHandler.javaCreateHandler.java |
102:121 101:120 61:80 34:53 74:93 116:135 | view |
| 17 | x 4 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...overycontrol/safetyrule | CreateHandler.javaDeleteHandler.javaReadHandler.javaUpdateHandler.java |
153:172 60:79 34:53 88:107 | view |
| 17 | x 4 | aws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...erycontrol/controlpanel | CreateHandler.javaDeleteHandler.javaReadHandler.javaCreateHandler.java |
102:121 83:102 34:53 51:70 | view |
| 12 | x 4 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...ycontrol/routingcontrol | BaseHandlerStd.javaBaseHandlerStd.javaBaseHandlerStd.javaBaseHandlerStd.java |
14:26 12:24 14:26 14:26 | view |
| 7 | x 3 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...erycontrol/controlpanel | Translator.javaTranslator.javaTranslator.java |
305:312 80:87 115:122 | view |
| 7 | x 4 | aws-route53recoverycontr...overycontrol/safetyruleaws-route53recoverycontr...recoverycontrol/clusteraws-route53recoverycontr...erycontrol/controlpanelaws-route53recoverycontr...ycontrol/routingcontrol | ClientBuilder.javaClientBuilder.javaClientBuilder.javaClientBuilder.java |
12:20 12:20 12:20 12:20 | view |