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
- 44% duplication:
- 1,782 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 800 duplicated lines
- 208 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-route53recoveryreadiness-cell/src/main/java/software/amazon/route53recoveryreadiness/cell (36%)
--> aws-route53recoveryreadiness-resourceset/src/main/java/software/amazon/route53recoveryreadiness/resourceset (22%)
235
20 file pairs
details...
aws-route53recoveryreadiness-recoverygroup/src/main/java/software/amazon/route53recoveryreadiness/recoverygroup (30%)
--> aws-route53recoveryreadiness-resourceset/src/main/java/software/amazon/route53recoveryreadiness/resourceset (20%)
212
20 file pairs
details...
aws-route53recoveryreadiness-cell/src/main/java/software/amazon/route53recoveryreadiness/cell (27%)
--> aws-route53recoveryreadiness-recoverygroup/src/main/java/software/amazon/route53recoveryreadiness/recoverygroup (25%)
178
20 file pairs
details...
aws-route53recoveryreadiness-readinesscheck/src/main/java/software/amazon/route53recoveryreadiness/readinesscheck (26%)
--> aws-route53recoveryreadiness-resourceset/src/main/java/software/amazon/route53recoveryreadiness/resourceset (17%)
178
24 file pairs
details...
aws-route53recoveryreadiness-cell/src/main/java/software/amazon/route53recoveryreadiness/cell (26%)
--> aws-route53recoveryreadiness-readinesscheck/src/main/java/software/amazon/route53recoveryreadiness/readinesscheck (25%)
170
24 file pairs
details...
aws-route53recoveryreadiness-readinesscheck/src/main/java/software/amazon/route53recoveryreadiness/readinesscheck (24%)
--> aws-route53recoveryreadiness-recoverygroup/src/main/java/software/amazon/route53recoveryreadiness/recoverygroup (24%)
168
24 file pairs
details...
aws-route53recoveryreadiness-cell (59%)
--> aws-route53recoveryreadiness-readinesscheck (56%)
64
2 file pairs
details...
aws-route53recoveryreadiness-readinesscheck (56%)
--> aws-route53recoveryreadiness-resourceset (57%)
64
2 file pairs
details...
aws-route53recoveryreadiness-cell (59%)
--> aws-route53recoveryreadiness-resourceset (57%)
64
2 file pairs
details...
aws-route53recoveryreadiness-readinesscheck (56%)
--> aws-route53recoveryreadiness-recoverygroup (58%)
64
2 file pairs
details...
aws-route53recoveryreadiness-recoverygroup (58%)
--> aws-route53recoveryreadiness-resourceset (57%)
64
2 file pairs
details...
aws-route53recoveryreadiness-cell (59%)
--> aws-route53recoveryreadiness-recoverygroup (58%)
64
2 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| aws-route53recoveryreadiness-cell/src/main/java/software/amazon/route53recoveryreadiness/cell (36%) --> aws-route53recoveryreadiness-resourceset/src/main/java/software/amazon/route53recoveryreadiness/resourceset (22%) |
235 | 20 file pairs | details... |
| aws-route53recoveryreadiness-recoverygroup/src/main/java/software/amazon/route53recoveryreadiness/recoverygroup (30%) --> aws-route53recoveryreadiness-resourceset/src/main/java/software/amazon/route53recoveryreadiness/resourceset (20%) |
212 | 20 file pairs | details... |
| aws-route53recoveryreadiness-cell/src/main/java/software/amazon/route53recoveryreadiness/cell (27%) --> aws-route53recoveryreadiness-recoverygroup/src/main/java/software/amazon/route53recoveryreadiness/recoverygroup (25%) |
178 | 20 file pairs | details... |
| aws-route53recoveryreadiness-readinesscheck/src/main/java/software/amazon/route53recoveryreadiness/readinesscheck (26%) --> aws-route53recoveryreadiness-resourceset/src/main/java/software/amazon/route53recoveryreadiness/resourceset (17%) |
178 | 24 file pairs | details... |
| aws-route53recoveryreadiness-cell/src/main/java/software/amazon/route53recoveryreadiness/cell (26%) --> aws-route53recoveryreadiness-readinesscheck/src/main/java/software/amazon/route53recoveryreadiness/readinesscheck (25%) |
170 | 24 file pairs | details... |
| aws-route53recoveryreadiness-readinesscheck/src/main/java/software/amazon/route53recoveryreadiness/readinesscheck (24%) --> aws-route53recoveryreadiness-recoverygroup/src/main/java/software/amazon/route53recoveryreadiness/recoverygroup (24%) |
168 | 24 file pairs | details... |
| aws-route53recoveryreadiness-cell (59%) --> aws-route53recoveryreadiness-readinesscheck (56%) |
64 | 2 file pairs | details... |
| aws-route53recoveryreadiness-readinesscheck (56%) --> aws-route53recoveryreadiness-resourceset (57%) |
64 | 2 file pairs | details... |
| aws-route53recoveryreadiness-cell (59%) --> aws-route53recoveryreadiness-resourceset (57%) |
64 | 2 file pairs | details... |
| aws-route53recoveryreadiness-readinesscheck (56%) --> aws-route53recoveryreadiness-recoverygroup (58%) |
64 | 2 file pairs | details... |
| aws-route53recoveryreadiness-recoverygroup (58%) --> aws-route53recoveryreadiness-resourceset (57%) |
64 | 2 file pairs | details... |
| aws-route53recoveryreadiness-cell (59%) --> aws-route53recoveryreadiness-recoverygroup (58%) |
64 | 2 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 52 | x 2 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...ryreadiness/resourceset |  CreateHandler.javaUpdateHandler.java |
117:188 (45%)123:193 (44%) | view |
| 24 | x 2 | aws-route53recoveryreadiness-cellaws-route53recoveryreadiness-readinesscheck |  resource-role.yamlresource-role.yaml |
1:25 (70%)1:25 (64%) | view |
| 24 | x 2 | aws-route53recoveryreadiness-readinesscheckaws-route53recoveryreadiness-resourceset | resource-role.yamlresource-role.yaml |
1:25 (64%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoveryreadiness-cellaws-route53recoveryreadiness-resourceset | resource-role.yamlresource-role.yaml |
1:25 (70%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoveryreadiness-readinesscheckaws-route53recoveryreadiness-recoverygroup | resource-role.yamlresource-role.yaml |
1:25 (64%)1:25 (68%) | view |
| 24 | x 2 | aws-route53recoveryreadiness-recoverygroupaws-route53recoveryreadiness-resourceset | resource-role.yamlresource-role.yaml |
1:25 (68%)1:25 (66%) | view |
| 24 | x 2 | aws-route53recoveryreadiness-cellaws-route53recoveryreadiness-recoverygroup | resource-role.yamlresource-role.yaml |
1:25 (70%)1:25 (68%) | view |
| 20 | x 2 | aws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...readiness/recoverygroup | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...readiness/recoverygroup | BaseHandlerStd.javaBaseHandlerStd.java |
17:38 (100%)12:33 (100%) | view |
| 20 | x 2 | aws-route53recoveryreadi...readiness/recoverygroupaws-route53recoveryreadi...ryreadiness/resourceset | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)10:31 (100%) | view |
| 20 | x 2 | aws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...eadiness/readinesscheck | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)17:38 (100%) | view |
| 20 | x 2 | aws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...ryreadiness/resourceset | BaseHandlerStd.javaBaseHandlerStd.java |
12:33 (100%)10:31 (100%) | view |
| 20 | x 2 | aws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...ryreadiness/resourceset | BaseHandlerStd.javaBaseHandlerStd.java |
17:38 (100%)10:31 (100%) | view |
| 17 | x 2 | aws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...eadiness/readinesscheck | CreateHandler.javaReadHandler.java |
113:133 (14%)41:61 (51%) | view |
| 17 | x 2 | aws-route53recoveryreadi...readiness/recoverygroupaws-route53recoveryreadi...readiness/recoverygroup | DeleteHandler.javaReadHandler.java |
69:89 (29%)39:58 (51%) | view |
| 16 | x 2 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...ryreadiness/resourceset | DeleteHandler.javaReadHandler.java |
72:90 (27%)35:53 (53%) | view |
| 16 | x 2 | aws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...eadiness/readinesscheck | ReadHandler.javaUpdateHandler.java |
42:61 (48%)59:78 (27%) | view |
| 16 | x 2 | aws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...eadiness/readinesscheck | CreateHandler.javaUpdateHandler.java |
114:133 (13%)59:78 (27%) | view |
| 16 | x 2 | aws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...3recoveryreadiness/cell | DeleteHandler.javaUpdateHandler.java |
66:86 (29%)82:102 (27%) | view |
| 15 | x 2 | aws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...3recoveryreadiness/cell | ReadHandler.javaUpdateHandler.java |
41:60 (46%)83:102 (25%) | view |
Duplicated Units
The list of top 9 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 29 | x 2 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...ryreadiness/resourceset | CreateHandler.javaUpdateHandler.java |
117:150 123:155 | view |
| 18 | x 2 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...ryreadiness/resourceset | DeleteHandler.javaReadHandler.java |
71:91 34:54 | view |
| 18 | x 2 | aws-route53recoveryreadi...readiness/recoverygroupaws-route53recoveryreadi...readiness/recoverygroup | DeleteHandler.javaReadHandler.java |
69:90 39:59 | view |
| 18 | x 3 | aws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...eadiness/readinesscheckaws-route53recoveryreadi...eadiness/readinesscheck | CreateHandler.javaReadHandler.javaUpdateHandler.java |
113:134 41:62 58:79 | view |
| 17 | x 3 | aws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...3recoveryreadiness/cell | DeleteHandler.javaReadHandler.javaUpdateHandler.java |
66:87 40:61 82:103 | view |
| 16 | x 2 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...ryreadiness/resourceset | CreateHandler.javaUpdateHandler.java |
152:170 157:175 | view |
| 16 | x 2 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...ryreadiness/resourceset | CreateHandler.javaUpdateHandler.java |
172:190 177:195 | view |
| 12 | x 4 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...readiness/recoverygroupaws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...eadiness/readinesscheck | BaseHandlerStd.javaBaseHandlerStd.javaBaseHandlerStd.javaBaseHandlerStd.java |
12:24 14:26 14:26 19:31 | view |
| 7 | x 4 | aws-route53recoveryreadi...ryreadiness/resourcesetaws-route53recoveryreadi...readiness/recoverygroupaws-route53recoveryreadi...3recoveryreadiness/cellaws-route53recoveryreadi...eadiness/readinesscheck | ClientBuilder.javaClientBuilder.javaClientBuilder.javaClientBuilder.java |
10:19 10:19 12:21 11:20 | view |