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org.sonar.l10n.checkstyle.rules.checkstyle.com.puppycrawl.tools.checkstyle.checks.metrics.JavaNCSSCheck.html Maven / Gradle / Ivy

Determines complexity of methods, classes and files by counting the Non Commenting Source Statements (NCSS). This check adheres to the  specification for the JavaNCSS-Tool  written by Chr. Clemens Lee.
Rougly said the NCSS metric is calculated by counting the source lines which are not comments, (nearly) equivalent to counting the semicolons and opening curly braces.
The NCSS for a class is summarized from the NCSS of all its methods, the NCSS of its nested classes and the number of member variable declarations.
The NCSS for a file is summarized from the ncss of all its top level classes, the number of imports and the package declaration.


Rationale: Too large methods and classes are hard to read and costly to maintain. A large NCSS number often means that a method or class has too many responsabilities and/or functionalities which should be decomposed into smaller units.