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Difference between revisions of "Duplicated code detection tool (SDD)"

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== Motivation ==
 
== Motivation ==
  
When one is not really paying attention when reviewing other people's code, duplications can happen easily, especially when there are many developers working on the same code base, such as in open source projects. But detecting duplications by people is very ineffective and previous algorithms to detect automatically are too slow for practical purposes or limited in its features. So implementing SDD can be a solution for the problem because SDD can find almost-duplicated (not exactly same) parts practically and Eclipse has a very good infrastructure for SDD UI.
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When one is not really paying attention when to review other people's code, duplications can easily happen. Especially when there are many developers working on the same code base, such as in open source projects. But detecting duplications by people is very ineffective and previous algorithms to detect automatically are too slow for practical purposes or limited in its features. So implementing SDD can be a solution for the problem because SDD can find almost-duplicated (not exactly same) parts practically and Eclipse has a very good infrastructure for SDD UI.
  
 
== SDD ==
 
== SDD ==
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* CVS - http://sourceforge.net/cvs/?group_id=169741
 
* CVS - http://sourceforge.net/cvs/?group_id=169741
 
* Download - http://sourceforge.net/project/showfiles.php?group_id=169741
 
* Download - http://sourceforge.net/project/showfiles.php?group_id=169741
* (At first, there's some license issues which I have to use, so I uploaded a code to SF. But now the depencies is all removed. So I'll . And final step, I changed whole pakage name, and it changed the version of every files to 1.1. :(, and I'll move to soc.eclipse.org soon.
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* (At first, there're some license issues which I have to use, so I uploaded a code to SF. But now there're no such dependencies. So I'll move to soc.eclipse.org soon. And at final step, I've changed the whole package names so every files' version are changed to 1.1. :(, and
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=== How to Use ===
 
=== How to Use ===
 
* Download plugin org.eclipse.soc.sdd_1.0.0.jar - http://sourceforge.net/project/showfiles.php?group_id=169741&package_id=193611&release_id=441043  
 
* Download plugin org.eclipse.soc.sdd_1.0.0.jar - http://sourceforge.net/project/showfiles.php?group_id=169741&package_id=193611&release_id=441043  
 
* Copy the org.eclipse.soc.sdd_1.0.0.jar into plugins folder of Eclipse
 
* Copy the org.eclipse.soc.sdd_1.0.0.jar into plugins folder of Eclipse
* Run eclipse
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* Run Eclipse
* Choose project, click right-button of mouse, choose SDD -> extract similar parts
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* Choose a project, click right-button of a mouse, choose SDD -> extract similar parts
 
* Wait a minute..2 minutes..or more? :)
 
* Wait a minute..2 minutes..or more? :)
* Result will be appear in SimilarPartsResultView
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* A result will be appeared in SimilarPartsResultView
 
* In SimilarPartsResultView
 
* In SimilarPartsResultView
** Double click "part - 1" , then you can see the files
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** Double click "part - #" , then you can see the filenames
 
** Double click the filename
 
** Double click the filename
** You can see Opening of a editor for the file and selections which means similar parts
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** You can see selected codes, which mean similar parts, in a editor
  
 
=== For changing properties for SDD ===
 
=== For changing properties for SDD ===
* Open properties page of project in Package Explorer or Navigator
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* Open a properties page of a project in Package Explorer or Navigator
* Choose SDD parts
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* Choose SDD part
* You can see 3 properties
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* You can change 3 properties
** Pattern for file matching - pattern of target files for SDD
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** Pattern for a file matching - a pattern of the target files for SDD
** N-neighbor Length - how 2 or 3 is suitable
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** N-neighbor Length - 2 or 3 will be suitable
** Minimum Chain Size - minimulm size of similar parts. Normally 15 or more is good. CAUTION: Below 10 can make Eclipse suspended.
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** Minimum Chain Size - a minimulm size of similar parts. Normally 15 or more is good. CAUTION: A Eclipse could be suspended with values near 1.  
 
* Click OK
 
* Click OK
  
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==Comments,Questions==
 
==Comments,Questions==
 
* feel free to comment, ask
 
* feel free to comment, ask
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[[Category:SOC]]

Latest revision as of 08:59, 14 October 2007

Project Lead: Iryoung Jeong

Mentor: Pascal Rapicault

Implementing SDD for eclipse environment. SDD is an algorithm for detecting duplicated parts which are not just identical, but also similar ones in a large amount of source code in a reasonable time.

Motivation

When one is not really paying attention when to review other people's code, duplications can easily happen. Especially when there are many developers working on the same code base, such as in open source projects. But detecting duplications by people is very ineffective and previous algorithms to detect automatically are too slow for practical purposes or limited in its features. So implementing SDD can be a solution for the problem because SDD can find almost-duplicated (not exactly same) parts practically and Eclipse has a very good infrastructure for SDD UI.

SDD

  • The algorithm for detecting similar parts in large source.
  • No dependency on specific languages, Not exact parts, Fast

CVS, downloads

How to Use

  • Download plugin org.eclipse.soc.sdd_1.0.0.jar - http://sourceforge.net/project/showfiles.php?group_id=169741&package_id=193611&release_id=441043
  • Copy the org.eclipse.soc.sdd_1.0.0.jar into plugins folder of Eclipse
  • Run Eclipse
  • Choose a project, click right-button of a mouse, choose SDD -> extract similar parts
  • Wait a minute..2 minutes..or more? :)
  • A result will be appeared in SimilarPartsResultView
  • In SimilarPartsResultView
    • Double click "part - #" , then you can see the filenames
    • Double click the filename
    • You can see selected codes, which mean similar parts, in a editor

For changing properties for SDD

  • Open a properties page of a project in Package Explorer or Navigator
  • Choose SDD part
  • You can change 3 properties
    • Pattern for a file matching - a pattern of the target files for SDD
    • N-neighbor Length - 2 or 3 will be suitable
    • Minimum Chain Size - a minimulm size of similar parts. Normally 15 or more is good. CAUTION: A Eclipse could be suspended with values near 1.
  • Click OK

Screenshots

  • Sdd-1.jpg
  • Sdd-2.jpg

How it works

  • Using an Index, Inverted Index

Related Works

External Links

SDD in OOPSLA2005

Comments,Questions

  • feel free to comment, ask