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
- 21% duplication:
- 41,917 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 9,104 duplicated lines
- 9,214 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-datastore (4%)
--> core (2%)
576
241 file pairs
details...
aws-auth-cognito (12%)
--> core (2%)
484
449 file pairs
details...
aws-storage-s3 (12%)
--> core (1%)
375
17 file pairs
details...
aws-api-appsync (10%)
--> core (1%)
312
73 file pairs
details...
aws-predictions-tensorflow (21%)
--> aws-predictions (6%)
266
5 file pairs
details...
aws-api (4%)
--> aws-datastore (1%)
259
18 file pairs
details...
core (1%)
--> testmodels (1%)
238
64 file pairs
details...
aws-predictions-tensorflow (13%)
--> core (<1%)
168
2 file pairs
details...
aws-predictions (3%)
--> core (<1%)
164
2 file pairs
details...
aws-api (2%)
--> core (<1%)
132
44 file pairs
details...
aws-api-appsync (4%)
--> aws-datastore (<1%)
132
22 file pairs
details...
aws-auth-cognito (2%)
--> testmodels (<1%)
112
28 file pairs
details...
aws-api-appsync (1%)
--> aws-api (<1%)
54
9 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| aws-datastore (4%) --> core (2%) |
576 | 241 file pairs | details... |
| aws-auth-cognito (12%) --> core (2%) |
484 | 449 file pairs | details... |
| aws-storage-s3 (12%) --> core (1%) |
375 | 17 file pairs | details... |
| aws-api-appsync (10%) --> core (1%) |
312 | 73 file pairs | details... |
| aws-predictions-tensorflow (21%) --> aws-predictions (6%) |
266 | 5 file pairs | details... |
| aws-api (4%) --> aws-datastore (1%) |
259 | 18 file pairs | details... |
| core (1%) --> testmodels (1%) |
238 | 64 file pairs | details... |
| aws-predictions-tensorflow (13%) --> core (<1%) |
168 | 2 file pairs | details... |
| aws-predictions (3%) --> core (<1%) |
164 | 2 file pairs | details... |
| aws-api (2%) --> core (<1%) |
132 | 44 file pairs | details... |
| aws-api-appsync (4%) --> aws-datastore (<1%) |
132 | 22 file pairs | details... |
| aws-auth-cognito (2%) --> testmodels (<1%) |
112 | 28 file pairs | details... |
| aws-api-appsync (1%) --> aws-api (<1%) |
54 | 9 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 30 | x 2 | aws-api/src/main/java/com/amplifyframework/api/awsaws-api/src/main/java/com/amplifyframework/api/aws |  AppSyncGraphQLOperation.javaMultiAuthAppSyncGraphQLOperation.java |
161:205 (25%)193:236 (21%) | view |
| 27 | x 2 | aws-storage-s3/src/main/...rk/storage/s3/operationaws-storage-s3/src/main/...rk/storage/s3/operation | AWSS3StorageUploadFileOperation.javaAWSS3StorageUploadInputStreamOperatio... |
70:104 (23%)72:106 (22%) | view |
| 26 | x 2 | aws-api/src/main/java/com/amplifyframework/api/awsaws-api/src/main/java/com/amplifyframework/api/aws | MutiAuthSubscriptionOperation.javaSubscriptionOperation.java |
200:237 (17%)132:169 (23%) | view |
| 23 | x 2 | aws-predictions/src/main...predictions/aws/adapteraws-predictions/src/main...predictions/aws/adapter | RekognitionResultTransformers.javaTextractResultTransformers.java |
58:100 (21%)62:103 (18%) | view |
| 23 | x 2 | aws-api/src/main/java/com/amplifyframework/api/awsaws-datastore/src/main/j...ework/datastore/appsync | AppSyncGraphQLRequestFactory.javaAppSyncRequestFactory.java |
325:347 (10%)298:320 (7%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | PrivateIAMPost.javaPrivatePublicComboUPPost.java |
128:169 (23%)128:169 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | GroupPublicUPAPIPost.javaPrivatePublicUPIAMPost.java |
129:170 (23%)129:170 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | PrivateIAMPost.javaPublicIAMPost.java |
128:169 (23%)128:169 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | GroupPublicUPAPIPost.javaOwnerPrivatePublicUPIAMAPIPost.java |
129:170 (23%)130:171 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | OwnerPublicUPAPIPost.javaPrivatePublicComboAPIPost.java |
129:170 (23%)128:169 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | OwnerPublicOIDAPIPost.javaPrivatePublicComboUPPost.java |
129:170 (23%)128:169 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | GroupPublicUPAPIPost.javaPrivatePublicComboUPPost.java |
129:170 (23%)128:169 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...estmodels/noteswithauthtestmodels/src/main/java...estmodels/noteswithauth | PrivateNote.javaPublicNote.java |
111:152 (26%)111:152 (26%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | OwnerPublicUPAPIPost.javaPublicPublicIAMAPIPost.java |
129:170 (23%)129:170 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | OwnerPublicUPIAMPost.javaPrivatePublicIAMAPIPost.java |
129:170 (23%)129:170 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/phonecall | PrivatePublicIAMAPIPost.javaPerson.java |
129:170 (23%)137:178 (21%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | GroupPrivatePublicUPIAMAPIPost.javaPrivatePrivateUPIAMPost.java |
130:171 (23%)129:170 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | PrivatePublicComboUPPost.javaPrivatePublicIAMAPIPost.java |
128:169 (23%)129:170 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | OwnerOIDCPost.javaPrivatePrivatePublicUPIAMAPIPost.java |
128:169 (23%)130:171 (23%) | view |
| 22 | x 2 | testmodels/src/main/java...rk/testmodels/multiauthtestmodels/src/main/java...rk/testmodels/multiauth | GroupPublicUPAPIPost.javaPrivateIAMPost.java |
129:170 (23%)128:169 (23%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 22 | x 3 | testutils/src/main/java/...lifyframework/testutilsaws-datastore/src/main/j...lifyframework/datastorerxbindings/src/main/java/com/amplifyframework/rx | AmplifyDisposables.javaAmplifyDisposables.javaAmplifyDisposables.java |
40:63 50:73 40:63 | view |
| 16 | x 2 | aws-api/src/main/java/com/amplifyframework/api/awsaws-api/src/main/java/com/amplifyframework/api/aws | MutiAuthSubscriptionOperation.javaSubscriptionOperation.java |
148:164 95:111 | view |
| 15 | x 2 | aws-storage-s3/src/main/...rk/storage/s3/operationaws-storage-s3/src/main/...rk/storage/s3/operation | AWSS3StorageUploadFileOperation.javaAWSS3StorageUploadInputStreamOperatio... |
64:79 66:81 | view |
| 14 | x 2 | aws-api/src/main/java/com/amplifyframework/api/awsaws-api/src/main/java/com/amplifyframework/api/aws | AWSApiPlugin.javaAWSApiPlugin.java |
223:237 257:271 | view |
| 13 | x 2 | aws-predictions/src/main...predictions/aws/adapteraws-predictions/src/main...predictions/aws/adapter | RekognitionResultTransformers.javaTextractResultTransformers.java |
78:91 82:95 | view |
| 12 | x 2 | aws-storage-s3/src/main/...rk/storage/s3/operationaws-storage-s3/src/main/...rk/storage/s3/operation | AWSS3StorageDownloadFileOperation.javaAWSS3StorageUploadFileOperation.java |
121:133 133:145 | view |
| 12 | x 2 | aws-storage-s3/src/main/...rk/storage/s3/operationaws-storage-s3/src/main/...rk/storage/s3/operation | AWSS3StorageDownloadFileOperation.javaAWSS3StorageUploadFileOperation.java |
136:148 148:160 | view |
| 12 | x 2 | aws-storage-s3/src/main/...rk/storage/s3/operationaws-storage-s3/src/main/...rk/storage/s3/operation | AWSS3StorageDownloadFileOperation.javaAWSS3StorageUploadFileOperation.java |
151:163 163:175 | view |
| 10 | x 2 | aws-predictions/src/main...predictions/aws/adapteraws-predictions/src/main...predictions/aws/adapter | RekognitionResultTransformers.javaTextractResultTransformers.java |
59:69 63:73 | view |
| 9 | x 2 | aws-predictions-tensorfl.../predictions/tensorflowaws-predictions/src/main...amework/predictions/aws | TensorFlowPredictionsPlugin.javaAWSPredictionsPlugin.java |
155:164 194:203 | view |
| 9 | x 56 | testmodels/src/main/java...rk/testmodels/phonecalltestmodels/src/main/java...rk/testmodels/phonecalltestmodels/src/main/java...rk/testmodels/phonecalltestmodels/src/main/java.../testmodels/teamprojecttestmodels/src/main/java.../testmodels/teamprojecttestmodels/src/main/java...amework/testmodels/todotestmodels/src/main/java...estmodels/noteswithauthtestmodels/src/main/java...estmodels/noteswithauthtestmodels/src/main/java...estmodels/noteswithauthtestmodels/src/main/java...rk/testmodels/parenting... | Person.javaPhone.javaCall.javaTeam.javaProjectfields.javaTodo.javaPrivateNote.javaTask.javaPublicNote.javaParent.java... |
155:166 187:198 208:219 142:153 155:166 381:392 129:140 169:180 129:140 188:199 ... | view |
| 8 | x 2 | aws-api/src/main/java/com/amplifyframework/api/awsaws-api/src/main/java/com/amplifyframework/api/aws | MultiAuthAppSyncGraphQLOperation.javaMutiAuthSubscriptionOperation.java |
146:154 166:174 | view |
| 8 | x 2 | aws-storage-s3/src/main/...rk/storage/s3/operationaws-storage-s3/src/main/...rk/storage/s3/operation | AWSS3StorageUploadFileOperation.javaAWSS3StorageUploadInputStreamOperatio... |
200:208 209:217 | view |
| 8 | x 2 | aws-storage-s3/src/main/...work/storage/s3/optionsaws-storage-s3/src/main/...work/storage/s3/options | AWSS3StorageUploadInputStreamOptions....AWSS3StorageUploadFileOptions.java |
104:112 104:112 | view |
| 8 | x 2 | aws-storage-s3/src/main/...work/storage/s3/optionsaws-storage-s3/src/main/...work/storage/s3/options | AWSS3StorageUploadInputStreamOptions....AWSS3StorageUploadFileOptions.java |
116:124 116:124 | view |
| 7 | x 2 | aws-datastore/src/main/j...ework/datastore/appsyncaws-api/src/main/java/com/amplifyframework/api/aws | AppSyncRequestFactory.javaAppSyncGraphQLRequestFactory.java |
375:382 355:362 | view |
| 7 | x 2 | aws-predictions-tensorfl...ctions/tensorflow/assetaws-predictions-tensorfl...ctions/tensorflow/asset | TextClassificationDictionary.javaTextClassificationLabels.java |
173:180 132:139 | view |
| 7 | x 2 | aws-predictions-tensorfl.../predictions/tensorflowaws-predictions/src/main...amework/predictions/aws | TensorFlowPredictionsPlugin.javaAWSPredictionsPlugin.java |
184:191 233:240 | view |
| 7 | x 3 | core/src/main/java/com/a...amework/storage/optionscore/src/main/java/com/a...amework/storage/optionscore/src/main/java/com/a...amework/storage/options | StorageUploadFileOptions.javaStorageUploadOptions.javaStorageUploadInputStreamOptions.java |
97:104 88:95 97:104 | view |
| 7 | x 3 | core/src/main/java/com/a...amework/storage/optionscore/src/main/java/com/a...amework/storage/optionscore/src/main/java/com/a...amework/storage/options | StorageUploadFileOptions.javaStorageUploadOptions.javaStorageUploadInputStreamOptions.java |
111:118 102:109 111:118 | view |