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
- 6% duplication:
- 22,305 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,396 duplicated lines
- 283 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 38 | x 2 | plugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui |  ApplyLabelForm.javaCreateBranchForm.java |
113:168 (27%)164:219 (35%) | view |
| 37 | x 2 | plugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | CreateBranchForm.javaProxySettingsForm.java |
163:217 (32%)98:152 (31%) | view |
| 37 | x 2 | plugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | CreateBranchForm.javaCreateBranchForm.java |
163:217 (32%)164:218 (34%) | view |
| 37 | x 2 | plugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | CreateBranchForm.javaProxySettingsForm.java |
164:218 (34%)98:152 (31%) | view |
| 37 | x 2 | plugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | CreateBranchForm.javaApplyLabelForm.java |
163:217 (32%)113:167 (26%) | view |
| 37 | x 2 | plugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | ApplyLabelForm.javaProxySettingsForm.java |
113:167 (26%)98:152 (31%) | view |
| 21 | x 2 | plugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft...idea/tfvc/ui/management | ApplyLabelForm.javaManageWorkspacesForm.java |
140:171 (15%)112:143 (10%) | view |
| 20 | x 2 | plugin/src/com/microsoft...idea/common/ui/checkoutplugin/src/com/microsoft...idea/git/ui/pullrequest | CheckoutForm.javaCreatePullRequestForm.java |
362:390 (9%)306:334 (10%) | view |
| 20 | x 2 | plugin/src/com/microsoft...idea/common/ui/checkoutplugin/src/com/microsoft.../common/ui/common/forms | CheckoutForm.javaTfsLoginForm.java |
362:390 (9%)179:207 (17%) | view |
| 20 | x 2 | plugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft.../common/ui/common/forms | FeedbackForm.javaTfsLoginForm.java |
121:149 (27%)179:207 (17%) | view |
| 20 | x 2 | plugin/src/com/microsoft...ommon/ui/authenticationplugin/src/com/microsoft.../common/ui/common/forms | DeviceFlowResponsePromptForm.javaTfsLoginForm.java |
110:138 (28%)179:207 (17%) | view |
| 20 | x 2 | plugin/src/com/microsoft...ommon/ui/authenticationplugin/src/com/microsoft...n/idea/git/ui/vcsimport | DeviceFlowResponsePromptForm.javaImportForm.java |
110:138 (28%)293:321 (11%) | view |
| 20 | x 2 | plugin/src/com/microsoft...ommon/ui/authenticationplugin/src/com/microsoft...idea/common/ui/checkout | DeviceFlowResponsePromptForm.javaCheckoutForm.java |
110:138 (28%)362:390 (9%) | view |
| 20 | x 2 | plugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft...idea/git/ui/pullrequest | TfsLoginForm.javaCreatePullRequestForm.java |
179:207 (17%)306:334 (10%) | view |
| 20 | x 2 | plugin/src/com/microsoft...ommon/ui/authenticationplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | DeviceFlowResponsePromptForm.javaMergeBranchForm.java |
110:138 (28%)97:125 (13%) | view |
| 20 | x 2 | plugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft...n/idea/git/ui/vcsimport | VsoLoginForm.javaImportForm.java |
181:209 (17%)293:321 (11%) | view |
| 20 | x 2 | plugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft...n/idea/git/ui/vcsimport | TfsLoginForm.javaImportForm.java |
179:207 (17%)293:321 (11%) | view |
| 20 | x 2 | plugin/src/com/microsoft...ommon/ui/authenticationplugin/src/com/microsoft.../common/ui/common/forms | DeviceFlowResponsePromptForm.javaVsoLoginForm.java |
110:138 (28%)181:209 (17%) | view |
| 20 | x 2 | plugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui | VsoLoginForm.javaMergeBranchForm.java |
181:209 (17%)97:125 (13%) | view |
| 20 | x 2 | plugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft.../common/ui/common/forms | FeedbackForm.javaVsoLoginForm.java |
121:149 (27%)181:209 (17%) | view |
Duplicated Units
The list of top 14 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 22 | x 13 | plugin/src/com/microsoft...ommon/ui/authenticationplugin/src/com/microsoft...idea/common/ui/checkoutplugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft.../common/ui/common/formsplugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft...idea/git/ui/pullrequestplugin/src/com/microsoft...n/idea/git/ui/vcsimportplugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/ui... | DeviceFlowResponsePromptForm.javaCheckoutForm.javaFeedbackForm.javaTfsLoginForm.javaVsoLoginForm.javaCreateBranchForm.javaCreatePullRequestForm.javaImportForm.javaApplyLabelForm.javaCreateBranchForm.java... |
110:132 362:384 121:143 179:201 181:203 163:185 306:328 293:315 113:135 164:186 ... | view |
| 22 | x 8 | plugin/src/com/microsoft...idea/common/ui/settingsplugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft/alm/plugin/idea/tfvc/uiplugin/src/com/microsoft...idea/tfvc/ui/management | TeamServicesSettingsForm.javaCreateBranchForm.javaApplyLabelForm.javaCreateBranchForm.javaLockItemsForm.javaProxySettingsForm.javaTFSVersionFilterComponent.javaManageWorkspacesForm.java |
179:201 190:212 140:162 191:213 149:171 125:147 129:151 112:134 | view |
| 11 | x 2 | plugin/src/com/microsoft...n/idea/common/ui/commonplugin/src/com/microsoft...idea/common/ui/workitem | ServerContextTableModel.javaWorkItemsTableModel.java |
68:81 59:72 | view |
| 9 | x 2 | plugin/src/com/microsoft...idea/common/ui/workitemplugin/src/com/microsoft...idea/common/ui/workitem | SelectWorkItemsModel.javaSelectWorkItemsModel.java |
149:158 160:169 | view |
| 9 | x 2 | plugin/src/com/microsoft/alm/plugin/operationsplugin/src/com/microsoft/alm/plugin/operations | WorkItemLookupOperation.javaWorkItemLookupOperation.java |
191:200 204:213 | view |
| 8 | x 3 | plugin/src/com/microsoft...idea/common/ui/checkoutplugin/src/com/microsoft...idea/common/ui/workitemplugin/src/com/microsoft...n/idea/git/ui/vcsimport | CheckoutForm.javaSelectWorkItemsForm.javaImportForm.java |
263:271 185:193 219:227 | view |
| 8 | x 2 | plugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft...a/git/ui/simplecheckout | CreateBranchController.javaSimpleCheckoutController.java |
103:112 80:89 | view |
| 8 | x 2 | plugin/src/com/microsoft/alm/plugin/idea/tfvc/coreplugin/src/com/microsoft/alm/plugin/idea/tfvc/core | ChangelistBuilderStatusVisitor.javaChangelistBuilderStatusVisitor.java |
85:93 95:103 | view |
| 7 | x 2 | plugin/src/com/microsoft...idea/common/ui/checkoutplugin/src/com/microsoft...n/idea/git/ui/vcsimport | CheckoutForm.javaImportForm.java |
252:261 208:217 | view |
| 7 | x 2 | plugin/src/com/microsoft...n/idea/common/ui/commonplugin/src/com/microsoft...idea/common/ui/workitem | ServerContextTableModel.javaWorkItemsTableModel.java |
297:304 234:241 | view |
| 7 | x 2 | plugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft...a/git/ui/simplecheckout | CreateBranchController.javaSimpleCheckoutController.java |
40:49 35:44 | view |
| 7 | x 2 | plugin/src/com/microsoft...ugin/idea/git/ui/branchplugin/src/com/microsoft.../idea/tfvc/ui/workspace | CreateBranchController.javaWorkspaceController.java |
51:58 156:163 | view |
| 6 | x 2 | plugin/src/com/microsoft...n/idea/common/ui/commonplugin/src/com/microsoft...idea/common/ui/workitem | ServerContextTableModel.javaWorkItemsTableModel.java |
115:121 98:104 | view |
| 6 | x 2 | plugin/src/com/microsoft...ugin/idea/tfvc/core/tfsplugin/src/com/microsoft...ugin/idea/tfvc/core/tfs | TfsFileUtil.javaTfsFileUtil.java |
186:192 233:239 | view |