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
- 26% duplication:
- 5,509 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,479 duplicated lines
- 862 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-ssm-association (22%)
--> aws-ssm-maintenancewindowtarget (35%)
348
46 file pairs
details...
aws-ssm-maintenancewindowtarget (30%)
--> aws-ssm-maintenancewindowtask (20%)
297
29 file pairs
details...
aws-ssm-association (17%)
--> aws-ssm-maintenancewindowtask (19%)
271
45 file pairs
details...
aws-ssm-opsmetadata (32%)
--> aws-ssm-parameter (33%)
270
19 file pairs
details...
aws-ssm-maintenancewindow (21%)
--> aws-ssm-maintenancewindowtask (14%)
210
30 file pairs
details...
aws-ssm-association (12%)
--> aws-ssm-maintenancewindow (20%)
192
44 file pairs
details...
aws-ssm-maintenancewindow (18%)
--> aws-ssm-maintenancewindowtarget (17%)
174
28 file pairs
details...
aws-ssm-association (10%)
--> aws-ssm-patchbaseline (10%)
156
43 file pairs
details...
aws-ssm-maintenancewindow (15%)
--> aws-ssm-patchbaseline (9%)
152
29 file pairs
details...
aws-ssm-association (9%)
--> aws-ssm-resourcedatasync (15%)
142
42 file pairs
details...
aws-ssm-association (9%)
--> aws-ssm-document (8%)
142
42 file pairs
details...
aws-ssm-maintenancewindowtarget (13%)
--> aws-ssm-patchbaseline (8%)
138
28 file pairs
details...
aws-ssm-document (7%)
--> aws-ssm-resourcedatasync (14%)
133
27 file pairs
details...
aws-ssm-document (7%)
--> aws-ssm-patchbaseline (8%)
128
27 file pairs
details...
aws-ssm-patchbaseline (8%)
--> aws-ssm-resourcedatasync (13%)
127
27 file pairs
details...
aws-ssm-document (7%)
--> aws-ssm-maintenancewindowtarget (12%)
126
27 file pairs
details...
aws-ssm-document (7%)
--> aws-ssm-maintenancewindowtask (8%)
126
27 file pairs
details...
aws-ssm-maintenancewindow (13%)
--> aws-ssm-resourcedatasync (13%)
126
27 file pairs
details...
aws-ssm-document (7%)
--> aws-ssm-maintenancewindow (12%)
124
27 file pairs
details...
aws-ssm-maintenancewindowtarget (12%)
--> aws-ssm-resourcedatasync (13%)
124
27 file pairs
details...
aws-ssm-maintenancewindowtask (8%)
--> aws-ssm-resourcedatasync (13%)
124
27 file pairs
details...
aws-ssm-maintenancewindowtask (8%)
--> aws-ssm-patchbaseline (7%)
124
27 file pairs
details...
aws-ssm-parameter (7%)
--> aws-ssm-patchbaseline (4%)
64
2 file pairs
details...
aws-ssm-maintenancewindow (6%)
--> aws-ssm-parameter (7%)
64
2 file pairs
details...
aws-ssm-parameter (7%)
--> aws-ssm-resourcedatasync (6%)
62
2 file pairs
details...
aws-ssm-association (4%)
--> aws-ssm-parameter (7%)
62
2 file pairs
details...
aws-ssm-maintenancewindowtarget (6%)
--> aws-ssm-parameter (7%)
62
2 file pairs
details...
aws-ssm-maintenancewindowtask (4%)
--> aws-ssm-parameter (7%)
62
2 file pairs
details...
aws-ssm-document (3%)
--> aws-ssm-parameter (7%)
62
2 file pairs
details...
aws-ssm-maintenancewindow (5%)
--> aws-ssm-opsmetadata (5%)
50
1 file pair
details...
aws-ssm-opsmetadata (5%)
--> aws-ssm-patchbaseline (3%)
50
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| aws-ssm-association (22%) --> aws-ssm-maintenancewindowtarget (35%) |
348 | 46 file pairs | details... |
| aws-ssm-maintenancewindowtarget (30%) --> aws-ssm-maintenancewindowtask (20%) |
297 | 29 file pairs | details... |
| aws-ssm-association (17%) --> aws-ssm-maintenancewindowtask (19%) |
271 | 45 file pairs | details... |
| aws-ssm-opsmetadata (32%) --> aws-ssm-parameter (33%) |
270 | 19 file pairs | details... |
| aws-ssm-maintenancewindow (21%) --> aws-ssm-maintenancewindowtask (14%) |
210 | 30 file pairs | details... |
| aws-ssm-association (12%) --> aws-ssm-maintenancewindow (20%) |
192 | 44 file pairs | details... |
| aws-ssm-maintenancewindow (18%) --> aws-ssm-maintenancewindowtarget (17%) |
174 | 28 file pairs | details... |
| aws-ssm-association (10%) --> aws-ssm-patchbaseline (10%) |
156 | 43 file pairs | details... |
| aws-ssm-maintenancewindow (15%) --> aws-ssm-patchbaseline (9%) |
152 | 29 file pairs | details... |
| aws-ssm-association (9%) --> aws-ssm-resourcedatasync (15%) |
142 | 42 file pairs | details... |
| aws-ssm-association (9%) --> aws-ssm-document (8%) |
142 | 42 file pairs | details... |
| aws-ssm-maintenancewindowtarget (13%) --> aws-ssm-patchbaseline (8%) |
138 | 28 file pairs | details... |
| aws-ssm-document (7%) --> aws-ssm-resourcedatasync (14%) |
133 | 27 file pairs | details... |
| aws-ssm-document (7%) --> aws-ssm-patchbaseline (8%) |
128 | 27 file pairs | details... |
| aws-ssm-patchbaseline (8%) --> aws-ssm-resourcedatasync (13%) |
127 | 27 file pairs | details... |
| aws-ssm-document (7%) --> aws-ssm-maintenancewindowtarget (12%) |
126 | 27 file pairs | details... |
| aws-ssm-document (7%) --> aws-ssm-maintenancewindowtask (8%) |
126 | 27 file pairs | details... |
| aws-ssm-maintenancewindow (13%) --> aws-ssm-resourcedatasync (13%) |
126 | 27 file pairs | details... |
| aws-ssm-document (7%) --> aws-ssm-maintenancewindow (12%) |
124 | 27 file pairs | details... |
| aws-ssm-maintenancewindowtarget (12%) --> aws-ssm-resourcedatasync (13%) |
124 | 27 file pairs | details... |
| aws-ssm-maintenancewindowtask (8%) --> aws-ssm-resourcedatasync (13%) |
124 | 27 file pairs | details... |
| aws-ssm-maintenancewindowtask (8%) --> aws-ssm-patchbaseline (7%) |
124 | 27 file pairs | details... |
| aws-ssm-parameter (7%) --> aws-ssm-patchbaseline (4%) |
64 | 2 file pairs | details... |
| aws-ssm-maintenancewindow (6%) --> aws-ssm-parameter (7%) |
64 | 2 file pairs | details... |
| aws-ssm-parameter (7%) --> aws-ssm-resourcedatasync (6%) |
62 | 2 file pairs | details... |
| aws-ssm-association (4%) --> aws-ssm-parameter (7%) |
62 | 2 file pairs | details... |
| aws-ssm-maintenancewindowtarget (6%) --> aws-ssm-parameter (7%) |
62 | 2 file pairs | details... |
| aws-ssm-maintenancewindowtask (4%) --> aws-ssm-parameter (7%) |
62 | 2 file pairs | details... |
| aws-ssm-document (3%) --> aws-ssm-parameter (7%) |
62 | 2 file pairs | details... |
| aws-ssm-maintenancewindow (5%) --> aws-ssm-opsmetadata (5%) |
50 | 1 file pair | details... |
| aws-ssm-opsmetadata (5%) --> aws-ssm-patchbaseline (3%) |
50 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 29 | x 2 | aws-ssm-maintenancewindo...enancewindowtarget/utilaws-ssm-maintenancewindo...ntenancewindowtask/util |  ResourceHandlerRequestToStringConvert...ResourceHandlerRequestToStringConvert... |
9:54 (100%)9:54 (100%) | view |
| 29 | x 2 | aws-ssm-association/src/...ws/ssm/association/utilaws-ssm-maintenancewindo...enancewindowtarget/util | ResourceHandlerRequestToStringConvert...ResourceHandlerRequestToStringConvert... |
9:54 (100%)9:54 (100%) | view |
| 29 | x 2 | aws-ssm-association/src/...ws/ssm/association/utilaws-ssm-maintenancewindo...ntenancewindowtask/util | ResourceHandlerRequestToStringConvert...ResourceHandlerRequestToStringConvert... |
9:54 (100%)9:54 (100%) | view |
| 28 | x 2 | aws-ssm-association/src/...ion/translator/propertyaws-ssm-maintenancewindo...get/translator/property | TargetsListTranslator.javaTargetsListTranslator.java |
13:63 (100%)13:63 (100%) | view |
| 25 | x 2 | aws-ssm-parameteraws-ssm-patchbaseline |  resource-role.yamlresource-role.yaml |
1:26 (71%)1:26 (60%) | view |
| 25 | x 2 | aws-ssm-maintenancewindowaws-ssm-opsmetadata | resource-role.yamlresource-role.yaml |
1:26 (67%)1:26 (67%) | view |
| 25 | x 2 | aws-ssm-opsmetadataaws-ssm-parameter | resource-role.yamlresource-role.yaml |
1:26 (67%)1:26 (71%) | view |
| 25 | x 2 | aws-ssm-maintenancewindowtargetaws-ssm-maintenancewindowtask | resource-role.yamlresource-role.yaml |
1:26 (73%)1:26 (67%) | view |
| 25 | x 2 | aws-ssm-documentaws-ssm-maintenancewindowtarget | resource-role.yamlresource-role.yaml |
1:26 (65%)1:26 (73%) | view |
| 25 | x 2 | aws-ssm-opsmetadataaws-ssm-patchbaseline | resource-role.yamlresource-role.yaml |
1:26 (67%)1:26 (60%) | view |
| 25 | x 2 | aws-ssm-documentaws-ssm-maintenancewindowtask | resource-role.yamlresource-role.yaml |
1:26 (65%)1:26 (67%) | view |
| 25 | x 2 | aws-ssm-maintenancewindowaws-ssm-patchbaseline | resource-role.yamlresource-role.yaml |
1:26 (67%)1:26 (60%) | view |
| 25 | x 2 | aws-ssm-maintenancewindowaws-ssm-parameter | resource-role.yamlresource-role.yaml |
1:26 (67%)1:26 (71%) | view |
| 24 | x 2 | aws-ssm-associationaws-ssm-opsmetadata | resource-role.yamlresource-role.yaml |
1:25 (63%)1:25 (64%) | view |
| 24 | x 2 | aws-ssm-parameteraws-ssm-resourcedatasync | resource-role.yamlresource-role.yaml |
1:25 (68%)1:25 (72%) | view |
| 24 | x 2 | aws-ssm-documentaws-ssm-resourcedatasync | resource-role.yamlresource-role.yaml |
1:25 (63%)1:25 (72%) | view |
| 24 | x 2 | aws-ssm-associationaws-ssm-patchbaseline | resource-role.yamlresource-role.yaml |
1:25 (63%)1:25 (58%) | view |
| 24 | x 2 | aws-ssm-documentaws-ssm-maintenancewindow | resource-role.yamlresource-role.yaml |
1:25 (63%)1:25 (64%) | view |
| 24 | x 2 | aws-ssm-documentaws-ssm-opsmetadata | resource-role.yamlresource-role.yaml |
1:25 (63%)1:25 (64%) | view |
| 24 | x 2 | aws-ssm-maintenancewindowtargetaws-ssm-patchbaseline | resource-role.yamlresource-role.yaml |
1:25 (70%)1:25 (58%) | view |
Duplicated Units
The list of top 10 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 26 | x 3 | aws-ssm-association/src/...ws/ssm/association/utilaws-ssm-maintenancewindo...enancewindowtarget/utilaws-ssm-maintenancewindo...ntenancewindowtask/util | ResourceHandlerRequestToStringConvert...ResourceHandlerRequestToStringConvert...ResourceHandlerRequestToStringConvert... |
28:55 28:55 28:55 | view |
| 19 | x 2 | aws-ssm-parameter/src/ma...amazonaws/ssm/parameteraws-ssm-parameter/src/ma...amazonaws/ssm/parameter | CreateHandler.javaUpdateHandler.java |
74:93 86:105 | view |
| 10 | x 2 | aws-ssm-parameter/src/ma...amazonaws/ssm/parameteraws-ssm-opsmetadata/src/...azonaws/ssm/opsmetadata | BaseHandlerStd.javaBaseHandlerStd.java |
25:35 21:31 | view |
| 10 | x 4 | aws-ssm-association/src/...azonaws/ssm/associationaws-ssm-maintenancewindo...maintenancewindowtargetaws-ssm-maintenancewindo...m/maintenancewindowtaskaws-ssm-maintenancewindo...n/ssm/maintenancewindow | ListHandler.javaListHandler.javaListHandler.javaListHandler.java |
15:29 15:29 15:29 15:29 | view |
| 6 | x 2 | aws-ssm-association/src/.../association/translatoraws-ssm-association/src/...tion/translator/request | AssociationDescriptionTranslator.javaCreateAssociationTranslator.java |
34:40 34:40 | view |
| 6 | x 4 | aws-ssm-association/src/.../association/translatoraws-ssm-maintenancewindo...windowtarget/translatoraws-ssm-maintenancewindo...cewindowtask/translatoraws-ssm-maintenancewindo...enancewindow/translator | ExceptionTranslator.javaExceptionTranslator.javaExceptionTranslator.javaExceptionTranslator.java |
95:103 75:83 75:83 67:75 | view |
| 6 | x 5 | aws-ssm-association/src/...ws/ssm/association/utilaws-ssm-patchbaseline/sr...ssm/patchbaseline/utilsaws-ssm-maintenancewindo...enancewindowtarget/utilaws-ssm-maintenancewindo...ntenancewindowtask/utilaws-ssm-maintenancewindo.../maintenancewindow/util | SimpleTypeValidator.javaSimpleTypeValidator.javaSimpleTypeValidator.javaSimpleTypeValidator.javaSimpleTypeValidator.java |
23:29 21:27 26:32 12:18 15:21 | view |
| 6 | x 3 | aws-ssm-association/src/...ws/ssm/association/utilaws-ssm-patchbaseline/sr...ssm/patchbaseline/utilsaws-ssm-maintenancewindo...enancewindowtarget/util | SsmClientBuilder.javaSsmClientBuilder.javaSsmClientBuilder.java |
16:22 8:14 16:22 | view |
| 6 | x 4 | aws-ssm-maintenancewindo...enancewindowtarget/utilaws-ssm-maintenancewindo...enancewindowtarget/utilaws-ssm-maintenancewindo...ntenancewindowtask/utilaws-ssm-maintenancewindo.../maintenancewindow/util | SimpleTypeValidator.javaSimpleTypeValidator.javaSimpleTypeValidator.javaSimpleTypeValidator.java |
15:21 37:43 23:29 26:32 | view |
| 6 | x 2 | aws-ssm-opsmetadata/src/...azonaws/ssm/opsmetadataaws-ssm-maintenancewindo...n/ssm/maintenancewindow | Configuration.javaConfiguration.java |
16:22 17:23 | view |