1679 lines
47 KiB
HTML
1679 lines
47 KiB
HTML
<!DOCTYPE html>
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<meta name="description" content="Index of the code metrics available out of the box to Apex rule developers.">
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<meta name="keywords" content="extendingmetrics, ">
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<title>Index of Apex code metrics | PMD Source Code Analyzer</title>
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<li class="sidebarTitle">PMD 6.50.0-SNAPSHOT</li>
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<div class="sidebarTitleDate">Release date: 30-September-2022</div>
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<a href="#">About</a>
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<li><a href="pmd_release_notes.html">Release notes</a></li>
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<li><a href="pmd_next_major_development.html">PMD 7.0.0 development</a></li>
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<li><a href="pmd_about_help.html">Getting help</a></li>
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<li>
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<a href="#">User Documentation</a>
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<ul>
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<li><a href="pmd_userdocs_installation.html">Installation and basic CLI usage</a></li>
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<li><a href="pmd_userdocs_making_rulesets.html">Making rulesets</a></li>
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<li><a href="pmd_userdocs_configuring_rules.html">Configuring rules</a></li>
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<li><a href="pmd_userdocs_best_practices.html">Best practices</a></li>
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<li><a href="pmd_userdocs_suppressing_warnings.html">Suppressing warnings</a></li>
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<li><a href="pmd_userdocs_incremental_analysis.html">Incremental analysis</a></li>
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<li><a href="pmd_userdocs_cli_reference.html">PMD CLI reference</a></li>
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<li><a href="pmd_userdocs_report_formats.html">PMD Report formats</a></li>
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<li class="subfolders">
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<a href="#">CPD reference</a>
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<ul>
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<li><a href="pmd_userdocs_cpd.html">Copy-paste detection</a></li>
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||
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<li><a href="pmd_userdocs_cpd_report_formats.html">CPD Report formats</a></li>
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||
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</ul>
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</li>
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<li class="subfolders">
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<a href="#">Extending PMD</a>
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<ul>
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||
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||
|
||
<li><a href="pmd_userdocs_extending_writing_rules_intro.html">Introduction to writing rules</a></li>
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||
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||
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||
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||
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<li><a href="pmd_userdocs_extending_your_first_rule.html">Your first rule</a></li>
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||
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<li><a href="pmd_userdocs_extending_writing_xpath_rules.html">XPath rules</a></li>
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||
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<li><a href="pmd_userdocs_extending_writing_java_rules.html">Java rules</a></li>
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||
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||
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||
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<li><a href="pmd_userdocs_extending_designer_reference.html">Rule designer reference</a></li>
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||
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||
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||
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||
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<li><a href="pmd_userdocs_extending_defining_properties.html">Defining rule properties</a></li>
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||
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||
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||
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||
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||
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<li><a href="pmd_userdocs_extending_metrics_howto.html">Using and defining code metrics</a></li>
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||
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||
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||
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||
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||
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<li><a href="pmd_userdocs_extending_rule_guidelines.html">Rule guidelines</a></li>
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||
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||
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||
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||
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||
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||
<li><a href="pmd_userdocs_extending_testing.html">Testing your rules</a></li>
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||
|
||
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||
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||
</ul>
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||
</li>
|
||
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||
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||
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<li class="subfolders">
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<a href="#">Tools / Integrations</a>
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<ul>
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<li><a href="pmd_userdocs_tools_maven.html">Maven PMD Plugin</a></li>
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||
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<li><a href="pmd_userdocs_tools_gradle.html">Gradle</a></li>
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||
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||
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||
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||
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<li><a href="pmd_userdocs_tools_ant.html">Ant</a></li>
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||
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||
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<li><a href="pmd_userdocs_tools_java_api.html">PMD Java API</a></li>
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<li><a href="pmd_userdocs_tools_ci.html">CI integrations</a></li>
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<li><a href="pmd_userdocs_tools.html">Other Tools / Integrations</a></li>
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||
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</ul>
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||
</li>
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||
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||
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||
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||
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||
|
||
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||
|
||
</ul>
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||
</li>
|
||
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||
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||
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||
<li>
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||
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<a href="#">Rule Reference</a>
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||
|
||
<ul>
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||
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||
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||
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||
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||
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||
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||
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||
<li class="subfolders">
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||
<a href="#">Apex Rules</a>
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<ul>
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||
|
||
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||
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||
<li><a href="pmd_rules_apex.html">Index</a></li>
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||
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||
|
||
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||
|
||
<li><a href="pmd_rules_apex_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_apex_codestyle.html">Code Style</a></li>
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||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_apex_design.html">Design</a></li>
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||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_apex_documentation.html">Documentation</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_apex_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_apex_performance.html">Performance</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_apex_security.html">Security</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Ecmascript Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_ecmascript.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_ecmascript_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_ecmascript_codestyle.html">Code Style</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_ecmascript_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">HTML Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_html.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_html_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Java Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_codestyle.html">Code Style</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_design.html">Design</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_documentation.html">Documentation</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_multithreading.html">Multithreading</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_performance.html">Performance</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_java_security.html">Security</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
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|
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||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Java Server Pages Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_jsp.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_jsp_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_jsp_codestyle.html">Code Style</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_jsp_design.html">Design</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_jsp_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_jsp_security.html">Security</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Maven POM Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_pom.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_pom_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Modelica Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_modelica.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_modelica_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">PLSQL Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_plsql.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_plsql_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_plsql_codestyle.html">Code Style</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_plsql_design.html">Design</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_plsql_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Salesforce VisualForce Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_vf.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_vf_security.html">Security</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">VM Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_vm.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_vm_bestpractices.html">Best Practices</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_vm_design.html">Design</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_vm_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">XML Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_xml.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_xml_errorprone.html">Error Prone</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">XSL Rules</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_xsl.html">Index</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_xsl_codestyle.html">Code Style</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_rules_xsl_performance.html">Performance</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
<li>
|
||
|
||
<a href="#">Language Specific Documentation</a>
|
||
|
||
<ul>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_jsp.html">JSP Support</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Java Support</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_java.html">Java Versions</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_java_metrics_index.html">Java Code Metrics</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="active"><a href="pmd_apex_metrics_index.html">Apex code metrics</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_plsql.html">PLSQL</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_visualforce.html">Visualforce</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_xml.html">XML and XML dialects</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_html.html">HTML</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_languages_gherkin.html">Gherkin</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
<li>
|
||
|
||
<a href="#">Developer Documentation</a>
|
||
|
||
<ul>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_development.html">Developer resources</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_building.html">Building PMD from source</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="https://github.com/pmd/pmd/blob/master/CONTRIBUTING.md" target="_blank">Contributing</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_writing_documentation.html">Writing documentation</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_roadmap.html">Roadmap</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_how_pmd_works.html">How PMD works</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_pmdtester.html">Pmdtester</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_rule_deprecation_policy.html">Rule Deprecation Policy</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Major contributions</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_major_rule_guidelines.html">Rule Guidelines</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_major_adding_new_language.html">Adding a new language</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_major_adding_new_cpd_language.html">Adding a new CPD language</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_major_adding_new_metrics_framework.html">Adding metrics support to a language</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Experimental features</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_devdocs_experimental_ast_dump.html">Creating (XML) dump of the AST</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
<li>
|
||
|
||
<a href="#">Project documentation</a>
|
||
|
||
<ul>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Trivia about PMD</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_trivia_news.html">PMD in the press</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_trivia_products.html">Products & books related to PMD</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_trivia_similarprojects.html">Similar projects</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_trivia_meaning.html">What does 'PMD' mean?</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_faq.html">FAQ</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="license.html">License</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_credits.html">Credits</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_release_notes_old.html">Old release notes</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="subfolders">
|
||
<a href="#">Project management</a>
|
||
<ul>
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_committers_infrastructure.html">Infrastructure</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_committers_releasing.html">Release process</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_committers_merging_pull_requests.html">Merging pull requests</a></li>
|
||
|
||
|
||
|
||
|
||
|
||
<li><a href="pmd_projectdocs_committers_main_landing_page.html">Main Landing page</a></li>
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</ul>
|
||
</li>
|
||
|
||
|
||
|
||
<!-- if you aren't using the accordion, uncomment this block:
|
||
<p class="external">
|
||
<a href="#" id="collapseAll">Collapse All</a> | <a href="#" id="expandAll">Expand All</a>
|
||
</p>
|
||
-->
|
||
</ul>
|
||
|
||
<!-- this highlights the active parent class in the navgoco sidebar. this is critical so that the parent expands when you're viewing a page. This must appear below the sidebar code above. Otherwise, if placed inside customscripts.js, the script runs before the sidebar code runs and the class never gets inserted.-->
|
||
<script>$("li.active").parents('li').toggleClass("active");</script>
|
||
|
||
</div>
|
||
|
||
|
||
|
||
<!-- Content Column -->
|
||
<div class="col-md-9" id="tg-sb-content">
|
||
<header>
|
||
<div class="row">
|
||
<div class="col-lg-12">
|
||
<a href="./" role="button"
|
||
><i class="fa fa-home fa-lg"></i
|
||
></a>
|
||
» Index of Apex code metrics
|
||
<a
|
||
target="_blank"
|
||
href="https://github.com/pmd/pmd/blob/master/docs/pages/pmd/languages/apex_metrics_index.md"
|
||
class="pull-right"
|
||
role="button"
|
||
><i class="fa fa-github fa-lg"></i> Edit on GitHub</a
|
||
>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
<hr />
|
||
</header>
|
||
|
||
|
||
<div class="post-header">
|
||
<h1 class="post-title-main">Index of Apex code metrics</h1>
|
||
</div>
|
||
|
||
|
||
|
||
<div class="post-content" data-github-edit-url="https://github.com/pmd/pmd/blob/master/docs/pages/pmd/languages/apex_metrics_index.md">
|
||
|
||
|
||
<div class="summary">Index of the code metrics available out of the box to Apex rule developers.</div>
|
||
|
||
<div id="inline-toc"><!-- empty, move TOC here when screen size too small --></div>
|
||
|
||
<h1 id="index-of-code-metrics">Index of code metrics</h1>
|
||
|
||
<h2 id="cognitive-complexity-cognitive">Cognitive Complexity (COGNITIVE)</h2>
|
||
|
||
<p><em>Operation metric.</em> Can be calculated on any non-abstract operation.</p>
|
||
|
||
<p><em>Class metric.</em> Can be computed on classes and enums - it’s just the sum of all method’s cogntive complexities.</p>
|
||
|
||
<h3 id="description">Description</h3>
|
||
|
||
<p>See the corresponding Java metric <a href="pmd_java_metrics_index.html#cognitive-complexity-cognitive_complexity">Cognitive Complexity</a> for a general description.</p>
|
||
|
||
<p>The rule <a href="pmd_rules_apex_design.html#cognitivecomplexity"><code class="language-plaintext highlighter-rouge">CognitiveComplexity</code></a> by default reports methods with a complexity of 15 or more
|
||
and classes the have a total complexity (sum of all methods) of 50 or more.
|
||
These reported methods should be broken down into less complex components.</p>
|
||
|
||
<h2 id="cyclomatic-complexity-cyclo">Cyclomatic Complexity (CYCLO)</h2>
|
||
|
||
<p><em>Operation metric.</em> Can be calculated on any non-abstract operation.</p>
|
||
|
||
<h3 id="description-1">Description</h3>
|
||
|
||
<p>Number of independent paths through a block of code [<a href="#Lanza05">Lanza05</a>].
|
||
Formally, given that the control flow graph of the block has <code class="language-plaintext highlighter-rouge">n</code> vertices, <code class="language-plaintext highlighter-rouge">e</code>
|
||
edges and <code class="language-plaintext highlighter-rouge">p</code> connected components, the cyclomatic complexity of the block is
|
||
given by <code class="language-plaintext highlighter-rouge">CYCLO = e - n + 2p</code> [<a href="#McCabe76">McCabe76</a>]. In practice it can be
|
||
calculated by counting control flow statements following the standard rules given
|
||
below.</p>
|
||
|
||
<p>The standard version of the metric complies with McCabe’s original definition:</p>
|
||
|
||
<ul>
|
||
<li>Methods have a base complexity of 1.</li>
|
||
<li>+1 for every control flow statement (<code class="language-plaintext highlighter-rouge">if</code>, <code class="language-plaintext highlighter-rouge">catch</code>, <code class="language-plaintext highlighter-rouge">throw</code>, <code class="language-plaintext highlighter-rouge">do</code>,
|
||
<code class="language-plaintext highlighter-rouge">while</code>, <code class="language-plaintext highlighter-rouge">for</code>, <code class="language-plaintext highlighter-rouge">break</code>, <code class="language-plaintext highlighter-rouge">continue</code>) and conditional expression (<code class="language-plaintext highlighter-rouge">?:</code>).</li>
|
||
<li><code class="language-plaintext highlighter-rouge">else</code>, <code class="language-plaintext highlighter-rouge">finally</code> and <code class="language-plaintext highlighter-rouge">default</code> don’t count;</li>
|
||
<li>+1 for every boolean operator (<code class="language-plaintext highlighter-rouge">&&</code>, <code class="language-plaintext highlighter-rouge">||</code>) in the guard condition of a control
|
||
flow statement.</li>
|
||
</ul>
|
||
|
||
<h3 id="code-examples">Code examples</h3>
|
||
|
||
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">class</span> <span class="nc">Foo</span> <span class="o">{</span>
|
||
<span class="kt">void</span> <span class="nf">baseCyclo</span><span class="o">()</span> <span class="o">{</span> <span class="c1">// Cyclo = 1</span>
|
||
<span class="n">highCyclo</span><span class="o">();</span>
|
||
<span class="o">}</span>
|
||
|
||
<span class="kt">void</span> <span class="nf">highCyclo</span><span class="o">()</span> <span class="o">{</span> <span class="c1">// Cyclo = 10</span>
|
||
<span class="kt">int</span> <span class="n">x</span> <span class="o">=</span> <span class="mi">0</span><span class="o">,</span> <span class="n">y</span> <span class="o">=</span> <span class="mi">2</span><span class="o">;</span>
|
||
<span class="kt">boolean</span> <span class="n">a</span> <span class="o">=</span> <span class="kc">false</span><span class="o">,</span> <span class="n">b</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
|
||
|
||
<span class="k">if</span> <span class="o">(</span><span class="n">a</span> <span class="o">&&</span> <span class="o">(</span><span class="n">y</span> <span class="o">==</span> <span class="mi">1</span> <span class="o">?</span> <span class="n">b</span> <span class="o">:</span> <span class="kc">true</span><span class="o">))</span> <span class="o">{</span> <span class="c1">// +3</span>
|
||
<span class="k">if</span> <span class="o">(</span><span class="n">y</span> <span class="o">==</span> <span class="n">x</span><span class="o">)</span> <span class="o">{</span> <span class="c1">// +1</span>
|
||
<span class="k">while</span> <span class="o">(</span><span class="kc">true</span><span class="o">)</span> <span class="o">{</span> <span class="c1">// +1</span>
|
||
<span class="k">if</span> <span class="o">(</span><span class="n">x</span><span class="o">++</span> <span class="o"><</span> <span class="mi">20</span><span class="o">)</span> <span class="o">{</span> <span class="c1">// +1</span>
|
||
<span class="k">break</span><span class="o">;</span> <span class="c1">// +1</span>
|
||
<span class="o">}</span>
|
||
<span class="o">}</span>
|
||
<span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(</span><span class="n">y</span> <span class="o">==</span> <span class="n">t</span> <span class="o">&&</span> <span class="o">!</span><span class="n">d</span><span class="o">)</span> <span class="o">{</span> <span class="c1">// +2</span>
|
||
<span class="n">x</span> <span class="o">=</span> <span class="n">a</span> <span class="o">?</span> <span class="n">y</span> <span class="o">:</span> <span class="n">x</span><span class="o">;</span> <span class="c1">// +1</span>
|
||
<span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
|
||
<span class="n">x</span> <span class="o">=</span> <span class="mi">2</span><span class="o">;</span>
|
||
<span class="o">}</span>
|
||
<span class="o">}</span>
|
||
<span class="o">}</span>
|
||
<span class="o">}</span>
|
||
</code></pre></div></div>
|
||
|
||
<h2 id="weighted-method-count-wmc">Weighted Method Count (WMC)</h2>
|
||
|
||
<p><em>Class metric.</em> Can be computed on classes and enums.</p>
|
||
|
||
<h1 id="references">References</h1>
|
||
|
||
<p><a name="Lanza05">Lanza05:</a> Lanza, Marinescu; Object-Oriented Metrics in Practice, 2005.</p>
|
||
|
||
<p><a name="McCabe76">McCabe76:</a> McCabe, A Complexity Measure, in Proceedings of the 2nd ICSE (1976).</p>
|
||
|
||
|
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