diff --git a/docs/config_duplicates.html b/docs/config_duplicates.html deleted file mode 100644 index b73ba0012..000000000 --- a/docs/config_duplicates.html +++ /dev/null @@ -1,164 +0,0 @@ - - - - - Duplicate Code Checks - - - - - - - - - - -

Duplicate Code Checks

Checkstyle Logo
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- - - -There are many trade-offs when writing a duplicate code detection tool. -Some of the conflicting goals are: -
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  • Fast
    • -
  • Low memory usage
    • -
  • Avoid false alarms
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  • Support multiple/arbitrary languages
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  • Support Fuzzy matches (comments, whitespace, linebreaks, variable renaming, etc.)
    • -
-

- -

-Note that there are brilliant commercial implementations of duplicate code -detection tools. One that is particularly noteworthy is -Simian -from RedHill Consulting, Inc. -

-

-Simian is reasonably priced (free for noncommercial projects) -and includes a Checkstyle plugin. -We encourage all users of Checkstyle to evaluate Simian as an -alternative to the Checks we offer in our distribution. -

- -

-The following table summarizes the characteristics of the available -Checkstyle plugins for duplicate code detection: - - - - - - - - - - - - - - - - - - - - - - - - - -
NameSpeedMemory UsageFalse AlarmsSupported languagesFuzzy matches
StrictDuplicateCodeMediumVery LowPossible but very unlikelyany languageNo
SimianVery highLowPossible but very unlikelymany languages, including Java and C/C++/C#Limited support
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- - -

StrictDuplicateCode

-

- Performs a line-by-line comparison of all code lines and reports - duplicate code, i.e. a sequence of lines that differ only in indentation. - All import statements in Java code are ignored, any other line - - including javadoc, whitespace lines between methods, etc. - is considered - (which is why the check is called strict). -

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Properties

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namedescriptiontypedefault value
minhow many lines must be equal to be considered a duplicateint12
charsetname of the file charsetStringSystem property "file.encoding"
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Examples

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- To configure the check: -

- 
-<module name="StrictDuplicateCode"/>
-
-

- To configure the check so that it allows larger equivalent blocks: -

- 
-<module name="StrictDuplicateCode">
-    <property name="min" value="15"/>
-</module>
-
-

- To configure the check so that it handles files with the UTF-8 - charset: -

- 
-<module name="StrictDuplicateCode">
-    <property name="charset" value="UTF-8"/>
-</module>
-
- -

Package

-

- com.puppycrawl.tools.checkstyle.checks.duplicates -

-

Parent Module

-

- Checker -

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Back to the Checkstyle Home Page
-

-Copyright © 2002-2004 Oliver Burn. All rights Reserved. -

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