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The Quality Index measures 4 weighted axes of quality and combines them to give a global note between 0 and 10 to the project, 10 being the best.

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Axes of

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Quality

Coding

Coding violationsissues: a PMD compliance index

Coding = (Blocker * 10 + Critical * 5 + Major * 3 + Minor + Info) / ValidLines

Where:

• ValidLines = Lines of Code Code - Duplicated Lines
• Blocker = number of PMD blocker violationsissues
• Critical = number of PMD critical violationsissues
• Major = number of PMD major violationsissues
• Minor = number of PMD minor violationsissues
• Info = number of PMD info violationsissues

Complexity

Complexity = (Complexity>30 * 10 + Complexity>20 * 5 + Complexity>10 * 3 + Complexity>1) / ValidLines

Where:

• ValidLines = Lines  Lines of Code Code - Duplicated  Duplicated Lines
• Complexity>X = number of methods whose Complexity is greater than X

Coverage

Coverage = Code coverage by unit tests.

If there is no unit tests and thus no code coverage, the Coverage axis will get the worst grade.

Style

Style violationsissues: a Checkstyle compliance index

Style = (Errors * 10 + Warnings) / ValidLines * 10

Where:

• ValidLines = Lines  Lines of Code Code - Duplicated  Duplicated Lines
• Errors = number of Checkstyle blocker violations issues+ number of Checkstyle critical violationsissues
• Warnings = number of Checkstyle major violations issues+ number of Checkstyle minor violations issues+ number of Checkstyle info violationsissues

Quality Index

Quality Index = 10 - 4.5 * Coding - 2 * Complexity - 2 * Coverage - 1.5 * Style

Complexity Factor

The Complexity Factor measures the complexity density.

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• Complexity>X = number of methods whose Complexity is whose Complexity is greater than X

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Installation

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1. Install the plugin through the Update Center or download it into the SONARQUBE_HOME/extensions/plugins

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1. directory

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1. Restart the SonarQubeserver

Usage

Run a new quality analysis and the metrics will be fed.

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Change Log

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