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
- 43% duplication:
- 5,541 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 2,408 duplicated lines
- 1,137 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-iot-mitigationaction (43%)
--> aws-iot-scheduledaudit (58%)
460
30 file pairs
details...
aws-iot-custommetric (58%)
--> aws-iot-scheduledaudit (58%)
460
30 file pairs
details...
aws-iot-custommetric (58%)
--> aws-iot-mitigationaction (43%)
460
30 file pairs
details...
aws-iot-custommetric (54%)
--> aws-iot-dimension (55%)
430
30 file pairs
details...
aws-iot-dimension (55%)
--> aws-iot-mitigationaction (40%)
430
30 file pairs
details...
aws-iot-dimension (55%)
--> aws-iot-scheduledaudit (54%)
430
30 file pairs
details...
aws-iot-mitigationaction (35%)
--> aws-iot-securityprofile (25%)
372
30 file pairs
details...
aws-iot-scheduledaudit (46%)
--> aws-iot-securityprofile (25%)
370
30 file pairs
details...
aws-iot-custommetric (47%)
--> aws-iot-securityprofile (25%)
370
30 file pairs
details...
aws-iot-dimension (45%)
--> aws-iot-securityprofile (24%)
356
30 file pairs
details...
aws-iot-accountauditconfiguration (25%)
--> aws-iot-mitigationaction (22%)
240
29 file pairs
details...
aws-iot-authorizer (30%)
--> aws-iot-policy (38%)
221
12 file pairs
details...
aws-iot-logging (41%)
--> aws-iot-resourcespecificlogging (36%)
220
28 file pairs
details...
aws-iot-certificate (31%)
--> aws-iot-provisioningtemplate (31%)
219
28 file pairs
details...
aws-iot-accountauditconfiguration (22%)
--> aws-iot-securityprofile (14%)
214
28 file pairs
details...
aws-iot-accountauditconfiguration (22%)
--> aws-iot-custommetric (27%)
214
28 file pairs
details...
aws-iot-accountauditconfiguration (22%)
--> aws-iot-scheduledaudit (27%)
214
28 file pairs
details...
aws-iot-accountauditconfiguration (22%)
--> aws-iot-dimension (27%)
210
28 file pairs
details...
aws-iot-domainconfiguration (27%)
--> aws-iot-provisioningtemplate (28%)
202
28 file pairs
details...
aws-iot-certificate (28%)
--> aws-iot-domainconfiguration (26%)
197
28 file pairs
details...
aws-iot-jobtemplate (26%)
--> aws-iot-provisioningtemplate (25%)
181
21 file pairs
details...
aws-iot-jobtemplate (21%)
--> aws-iot-resourcespecificlogging (24%)
149
22 file pairs
details...
aws-iot-jobtemplate (20%)
--> aws-iot-logging (27%)
145
22 file pairs
details...
aws-iot-authorizer (18%)
--> aws-iot-domainconfiguration (18%)
138
5 file pairs
details...
aws-iot-certificate (19%)
--> aws-iot-jobtemplate (19%)
137
21 file pairs
details...
aws-iot-accountauditconfiguration (12%)
--> aws-iot-logging (22%)
118
4 file pairs
details...
aws-iot-domainconfiguration (15%)
--> aws-iot-logging (21%)
115
26 file pairs
details...
aws-iot-domainconfiguration (15%)
--> aws-iot-resourcespecificlogging (18%)
115
26 file pairs
details...
aws-iot-logging (21%)
--> aws-iot-provisioningtemplate (16%)
114
26 file pairs
details...
aws-iot-provisioningtemplate (16%)
--> aws-iot-resourcespecificlogging (18%)
114
26 file pairs
details...
aws-iot-certificate (16%)
--> aws-iot-resourcespecificlogging (18%)
113
26 file pairs
details...
aws-iot-certificate (16%)
--> aws-iot-logging (21%)
113
26 file pairs
details...
aws-iot-domainconfiguration (14%)
--> aws-iot-jobtemplate (15%)
109
21 file pairs
details...
aws-iot-domainconfiguration (14%)
--> aws-iot-policy (18%)
106
4 file pairs
details...
aws-iot-authorizer (13%)
--> aws-iot-certificate (14%)
100
4 file pairs
details...
aws-iot-certificate (12%)
--> aws-iot-policy (15%)
86
3 file pairs
details...
aws-iot-authorizer (11%)
--> aws-iot-provisioningtemplate (12%)
86
3 file pairs
details...
aws-iot-accountauditconfiguration (8%)
--> aws-iot-resourcespecificlogging (13%)
82
2 file pairs
details...
aws-iot-logging (14%)
--> aws-iot-mitigationaction (7%)
80
2 file pairs
details...
aws-iot-logging (14%)
--> aws-iot-securityprofile (5%)
80
2 file pairs
details...
aws-iot-mitigationaction (7%)
--> aws-iot-resourcespecificlogging (12%)
78
2 file pairs
details...
aws-iot-custommetric (9%)
--> aws-iot-resourcespecificlogging (12%)
78
2 file pairs
details...
aws-iot-resourcespecificlogging (12%)
--> aws-iot-securityprofile (5%)
78
2 file pairs
details...
aws-iot-resourcespecificlogging (12%)
--> aws-iot-scheduledaudit (9%)
78
2 file pairs
details...
aws-iot-logging (14%)
--> aws-iot-scheduledaudit (9%)
78
2 file pairs
details...
aws-iot-custommetric (9%)
--> aws-iot-logging (14%)
78
2 file pairs
details...
aws-iot-dimension (9%)
--> aws-iot-resourcespecificlogging (12%)
76
2 file pairs
details...
aws-iot-dimension (9%)
--> aws-iot-logging (14%)
76
2 file pairs
details...
aws-iot-policy (12%)
--> aws-iot-provisioningtemplate (10%)
72
2 file pairs
details...
aws-iot-jobtemplate (7%)
--> aws-iot-securityprofile (3%)
50
1 file pair
details...
aws-iot-jobtemplate (7%)
--> aws-iot-mitigationaction (4%)
50
1 file pair
details...
aws-iot-accountauditconfiguration (5%)
--> aws-iot-jobtemplate (7%)
50
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| aws-iot-mitigationaction (43%) --> aws-iot-scheduledaudit (58%) |
460 | 30 file pairs | details... |
| aws-iot-custommetric (58%) --> aws-iot-scheduledaudit (58%) |
460 | 30 file pairs | details... |
| aws-iot-custommetric (58%) --> aws-iot-mitigationaction (43%) |
460 | 30 file pairs | details... |
| aws-iot-custommetric (54%) --> aws-iot-dimension (55%) |
430 | 30 file pairs | details... |
| aws-iot-dimension (55%) --> aws-iot-mitigationaction (40%) |
430 | 30 file pairs | details... |
| aws-iot-dimension (55%) --> aws-iot-scheduledaudit (54%) |
430 | 30 file pairs | details... |
| aws-iot-mitigationaction (35%) --> aws-iot-securityprofile (25%) |
372 | 30 file pairs | details... |
| aws-iot-scheduledaudit (46%) --> aws-iot-securityprofile (25%) |
370 | 30 file pairs | details... |
| aws-iot-custommetric (47%) --> aws-iot-securityprofile (25%) |
370 | 30 file pairs | details... |
| aws-iot-dimension (45%) --> aws-iot-securityprofile (24%) |
356 | 30 file pairs | details... |
| aws-iot-accountauditconfiguration (25%) --> aws-iot-mitigationaction (22%) |
240 | 29 file pairs | details... |
| aws-iot-authorizer (30%) --> aws-iot-policy (38%) |
221 | 12 file pairs | details... |
| aws-iot-logging (41%) --> aws-iot-resourcespecificlogging (36%) |
220 | 28 file pairs | details... |
| aws-iot-certificate (31%) --> aws-iot-provisioningtemplate (31%) |
219 | 28 file pairs | details... |
| aws-iot-accountauditconfiguration (22%) --> aws-iot-securityprofile (14%) |
214 | 28 file pairs | details... |
| aws-iot-accountauditconfiguration (22%) --> aws-iot-custommetric (27%) |
214 | 28 file pairs | details... |
| aws-iot-accountauditconfiguration (22%) --> aws-iot-scheduledaudit (27%) |
214 | 28 file pairs | details... |
| aws-iot-accountauditconfiguration (22%) --> aws-iot-dimension (27%) |
210 | 28 file pairs | details... |
| aws-iot-domainconfiguration (27%) --> aws-iot-provisioningtemplate (28%) |
202 | 28 file pairs | details... |
| aws-iot-certificate (28%) --> aws-iot-domainconfiguration (26%) |
197 | 28 file pairs | details... |
| aws-iot-jobtemplate (26%) --> aws-iot-provisioningtemplate (25%) |
181 | 21 file pairs | details... |
| aws-iot-jobtemplate (21%) --> aws-iot-resourcespecificlogging (24%) |
149 | 22 file pairs | details... |
| aws-iot-jobtemplate (20%) --> aws-iot-logging (27%) |
145 | 22 file pairs | details... |
| aws-iot-authorizer (18%) --> aws-iot-domainconfiguration (18%) |
138 | 5 file pairs | details... |
| aws-iot-certificate (19%) --> aws-iot-jobtemplate (19%) |
137 | 21 file pairs | details... |
| aws-iot-accountauditconfiguration (12%) --> aws-iot-logging (22%) |
118 | 4 file pairs | details... |
| aws-iot-domainconfiguration (15%) --> aws-iot-logging (21%) |
115 | 26 file pairs | details... |
| aws-iot-domainconfiguration (15%) --> aws-iot-resourcespecificlogging (18%) |
115 | 26 file pairs | details... |
| aws-iot-logging (21%) --> aws-iot-provisioningtemplate (16%) |
114 | 26 file pairs | details... |
| aws-iot-provisioningtemplate (16%) --> aws-iot-resourcespecificlogging (18%) |
114 | 26 file pairs | details... |
| aws-iot-certificate (16%) --> aws-iot-resourcespecificlogging (18%) |
113 | 26 file pairs | details... |
| aws-iot-certificate (16%) --> aws-iot-logging (21%) |
113 | 26 file pairs | details... |
| aws-iot-domainconfiguration (14%) --> aws-iot-jobtemplate (15%) |
109 | 21 file pairs | details... |
| aws-iot-domainconfiguration (14%) --> aws-iot-policy (18%) |
106 | 4 file pairs | details... |
| aws-iot-authorizer (13%) --> aws-iot-certificate (14%) |
100 | 4 file pairs | details... |
| aws-iot-certificate (12%) --> aws-iot-policy (15%) |
86 | 3 file pairs | details... |
| aws-iot-authorizer (11%) --> aws-iot-provisioningtemplate (12%) |
86 | 3 file pairs | details... |
| aws-iot-accountauditconfiguration (8%) --> aws-iot-resourcespecificlogging (13%) |
82 | 2 file pairs | details... |
| aws-iot-logging (14%) --> aws-iot-mitigationaction (7%) |
80 | 2 file pairs | details... |
| aws-iot-logging (14%) --> aws-iot-securityprofile (5%) |
80 | 2 file pairs | details... |
| aws-iot-mitigationaction (7%) --> aws-iot-resourcespecificlogging (12%) |
78 | 2 file pairs | details... |
| aws-iot-custommetric (9%) --> aws-iot-resourcespecificlogging (12%) |
78 | 2 file pairs | details... |
| aws-iot-resourcespecificlogging (12%) --> aws-iot-securityprofile (5%) |
78 | 2 file pairs | details... |
| aws-iot-resourcespecificlogging (12%) --> aws-iot-scheduledaudit (9%) |
78 | 2 file pairs | details... |
| aws-iot-logging (14%) --> aws-iot-scheduledaudit (9%) |
78 | 2 file pairs | details... |
| aws-iot-custommetric (9%) --> aws-iot-logging (14%) |
78 | 2 file pairs | details... |
| aws-iot-dimension (9%) --> aws-iot-resourcespecificlogging (12%) |
76 | 2 file pairs | details... |
| aws-iot-dimension (9%) --> aws-iot-logging (14%) |
76 | 2 file pairs | details... |
| aws-iot-policy (12%) --> aws-iot-provisioningtemplate (10%) |
72 | 2 file pairs | details... |
| aws-iot-jobtemplate (7%) --> aws-iot-securityprofile (3%) |
50 | 1 file pair | details... |
| aws-iot-jobtemplate (7%) --> aws-iot-mitigationaction (4%) |
50 | 1 file pair | details... |
| aws-iot-accountauditconfiguration (5%) --> aws-iot-jobtemplate (7%) |
50 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 45 | x 2 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-scheduledaudit/s...naws/iot/scheduledaudit |  Translator.javaTranslator.java |
32:99 (32%)31:98 (81%) | view |
| 45 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-scheduledaudit/s...naws/iot/scheduledaudit | Translator.javaTranslator.java |
31:94 (81%)31:98 (81%) | view |
| 45 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-mitigationaction...ws/iot/mitigationaction | Translator.javaTranslator.java |
31:94 (81%)32:99 (32%) | view |
| 43 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-dimension/src/ma...amazonaws/iot/dimension | Translator.javaTranslator.java |
34:94 (78%)27:92 (78%) | view |
| 43 | x 2 | aws-iot-dimension/src/ma...amazonaws/iot/dimensionaws-iot-mitigationaction...ws/iot/mitigationaction | UpdateHandler.javaUpdateHandler.java |
76:145 (55%)93:162 (48%) | view |
| 43 | x 2 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-scheduledaudit/s...naws/iot/scheduledaudit | UpdateHandler.javaUpdateHandler.java |
93:162 (48%)89:158 (49%) | view |
| 43 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-scheduledaudit/s...naws/iot/scheduledaudit | UpdateHandler.javaUpdateHandler.java |
87:155 (51%)89:158 (49%) | view |
| 43 | x 2 | aws-iot-dimension/src/ma...amazonaws/iot/dimensionaws-iot-mitigationaction...ws/iot/mitigationaction | Translator.javaTranslator.java |
27:92 (78%)35:99 (31%) | view |
| 43 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-dimension/src/ma...amazonaws/iot/dimension | UpdateHandler.javaUpdateHandler.java |
87:155 (51%)76:145 (55%) | view |
| 43 | x 2 | aws-iot-dimension/src/ma...amazonaws/iot/dimensionaws-iot-scheduledaudit/s...naws/iot/scheduledaudit | UpdateHandler.javaUpdateHandler.java |
76:145 (55%)89:158 (49%) | view |
| 43 | x 2 | aws-iot-dimension/src/ma...amazonaws/iot/dimensionaws-iot-scheduledaudit/s...naws/iot/scheduledaudit | Translator.javaTranslator.java |
27:92 (78%)34:98 (78%) | view |
| 43 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-mitigationaction...ws/iot/mitigationaction | UpdateHandler.javaUpdateHandler.java |
87:155 (51%)93:162 (48%) | view |
| 35 | x 2 | aws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-securityprofile/...aws/iot/securityprofile | Translator.javaTranslator.java |
33:83 (63%)329:380 (13%) | view |
| 35 | x 2 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-securityprofile/...aws/iot/securityprofile | Translator.javaTranslator.java |
34:84 (25%)329:380 (13%) | view |
| 35 | x 2 | aws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-securityprofile/...aws/iot/securityprofile | Translator.javaTranslator.java |
33:79 (63%)329:380 (13%) | view |
| 34 | x 2 | aws-iot-dimension/src/ma...amazonaws/iot/dimensionaws-iot-securityprofile/...aws/iot/securityprofile | Translator.javaTranslator.java |
27:77 (61%)330:380 (13%) | view |
| 25 | x 2 | aws-iot-resourcespecific...resourcespecificloggingaws-iot-resourcespecific...resourcespecificlogging | DeleteHandler.javaUpdateHandler.java |
23:62 (65%)24:63 (59%) | view |
| 25 | x 2 | aws-iot-mitigationactionaws-iot-securityprofile |  resource-role.yamlresource-role.yaml |
1:26 (65%)1:26 (60%) | view |
| 25 | x 2 | aws-iot-jobtemplateaws-iot-securityprofile | resource-role.yamlresource-role.yaml |
1:26 (71%)1:26 (60%) | view |
| 25 | x 2 | aws-iot-jobtemplateaws-iot-mitigationaction | resource-role.yamlresource-role.yaml |
1:26 (71%)1:26 (65%) | view |
Duplicated Units
The list of top 9 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 41 | x 4 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-dimension/src/ma...amazonaws/iot/dimension | UpdateHandler.javaUpdateHandler.javaUpdateHandler.javaUpdateHandler.java |
94:153 88:146 90:149 77:136 | view |
| 24 | x 5 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-securityprofile/...aws/iot/securityprofileaws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-dimension/src/ma...amazonaws/iot/dimension | Translator.javaTranslator.javaTranslator.javaTranslator.javaTranslator.java |
51:86 50:81 345:382 50:85 42:79 | view |
| 19 | x 4 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-dimension/src/ma...amazonaws/iot/dimension | HandlerUtils.javaHandlerUtils.javaHandlerUtils.javaHandlerUtils.java |
15:37 15:36 15:36 18:39 | view |
| 13 | x 8 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-securityprofile/...aws/iot/securityprofileaws-iot-logging/src/main...ware/amazon/iot/loggingaws-iot-resourcespecific...resourcespecificloggingaws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-dimension/src/ma...amazonaws/iot/dimensionaws-iot-accountauditconf...countauditconfiguration | Translator.javaTranslator.javaTranslator.javaExceptionTranslator.javaExceptionTranslator.javaTranslator.javaTranslator.javaTranslator.java |
34:48 33:47 329:343 20:34 21:35 33:47 26:40 21:35 | view |
| 12 | x 5 | aws-iot-certificate/src/...azonaws/iot/certificateaws-iot-policy/src/main/...om/amazonaws/iot/policyaws-iot-provisioningtemp...ot/provisioningtemplateaws-iot-domainconfigurat...iot/domainconfigurationaws-iot-authorizer/src/m...mazonaws/iot/authorizer | ClientBuilder.javaClientBuilder.javaClientBuilder.javaClientBuilder.javaClientBuilder.java |
10:23 10:23 10:23 10:23 10:23 | view |
| 11 | x 2 | aws-iot-policy/src/main/...om/amazonaws/iot/policyaws-iot-authorizer/src/m...mazonaws/iot/authorizer | BaseHandlerStd.javaBaseHandlerStd.java |
18:30 18:30 | view |
| 10 | x 4 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-dimension/src/ma...amazonaws/iot/dimension | Translator.javaTranslator.javaTranslator.javaTranslator.java |
88:100 83:95 87:99 81:93 | view |
| 7 | x 5 | aws-iot-mitigationaction...ws/iot/mitigationactionaws-iot-custommetric/src...zonaws/iot/custommetricaws-iot-securityprofile/...aws/iot/securityprofileaws-iot-scheduledaudit/s...naws/iot/scheduledauditaws-iot-dimension/src/ma...amazonaws/iot/dimension | Configuration.javaConfiguration.javaConfiguration.javaConfiguration.javaConfiguration.java |
13:20 13:20 13:20 13:20 13:20 | view |
| 7 | x 3 | aws-iot-provisioningtemp...ot/provisioningtemplateaws-iot-domainconfigurat...iot/domainconfigurationaws-iot-authorizer/src/m...mazonaws/iot/authorizer | CreateHandler.javaCreateHandler.javaTranslator.java |
87:94 60:67 111:118 | view |