pmd/pmd_userdocs_tools_java_api.html
Travis CI (pmd-bot) eda9b90616 Update documentation
TRAVIS_JOB_NUMBER=5138.2
TRAVIS_COMMIT_RANGE=1d4884d95445...4db656a6795b
2020-04-18 00:11:26 +00:00

1694 lines
66 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="keywords" content="userdocstools, ">
<title>PMD Java API | PMD Source Code Analyzer</title>
<link rel="stylesheet" href="css/syntax.css">
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
<!--<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">-->
<link rel="stylesheet" href="css/modern-business.css">
<link rel="stylesheet" href="css/lavish-bootstrap.css">
<link rel="stylesheet" href="css/customstyles.css">
<link rel="stylesheet" href="css/theme-blue.css">
<link rel="stylesheet" href="css/pmd-customstyles.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>
<script src="js/jquery.navgoco.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/2.0.0/anchor.min.js"></script>
<script src="js/toc.js"></script>
<script src="js/customscripts.js"></script>
<link rel="shortcut icon" href="images/favicon.ico" type="image/x-icon">
<link rel="icon" href="images/favicon.ico" type="image/x-icon">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
<link rel="alternate" type="application/rss+xml" title="" href="https://pmd.github.io/pmd/feed.xml">
<script>
$(document).ready(function() {
// Initialize navgoco with default options
$("#mysidebar").navgoco({
caretHtml: '',
accordion: true,
openClass: 'active', // open
save: false, // leave false or nav highlighting doesn't work right
cookie: {
name: 'navgoco',
expires: false,
path: '/'
},
slide: {
duration: 400,
easing: 'swing'
}
});
$("#collapseAll").click(function(e) {
e.preventDefault();
$("#mysidebar").navgoco('toggle', false);
});
$("#expandAll").click(function(e) {
e.preventDefault();
$("#mysidebar").navgoco('toggle', true);
});
});
</script>
<script>
$(function () {
$('[data-toggle="tooltip"]').tooltip()
})
</script>
<script>
$(document).ready(function() {
$("#tg-sb-link").click(function() {
$("#tg-sb-sidebar").toggle();
$("#tg-sb-content").toggleClass('col-md-9');
$("#tg-sb-content").toggleClass('col-md-12');
$("#tg-sb-icon").toggleClass('fa-toggle-on');
$("#tg-sb-icon").toggleClass('fa-toggle-off');
});
});
</script>
</head>
<body>
<!-- Content is offset by the height of the topnav bar. -->
<!-- There's already a padding-top rule in modern-business.css, but it apparently doesn't work on Firefox 60 and Chrome 67 -->
<div id="topbar-content-offset">
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container topnavlinks">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="fa fa-home fa-lg navbar-brand" href="index.html">&nbsp;<span class="projectTitle"> PMD Source Code Analyzer Project</span></a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<!-- toggle sidebar button -->
<li><a id="tg-sb-link" href="#"><i id="tg-sb-icon" class="fa fa-toggle-on"></i> Nav</a></li>
<!-- entries without drop-downs appear here -->
<li><a href="https://github.com/pmd/pmd/releases/latest" target="_blank">Download</a></li>
<li><a href="https://github.com/pmd/pmd" target="_blank">Fork us on github</a></li>
<!-- entries with drop-downs appear here -->
<!-- conditional logic to control which topnav appears for the audience defined in the configuration file.-->
<!--comment out this block if you want to hide search-->
<li>
<!--start search-->
<div id="search-demo-container">
<input type="text" id="search-input" placeholder="search...">
<ul id="results-container"></ul>
</div>
<script src="js/jekyll-search.js" type="text/javascript"></script>
<script type="text/javascript">
SimpleJekyllSearch.init({
searchInput: document.getElementById('search-input'),
resultsContainer: document.getElementById('results-container'),
dataSource: 'search.json',
searchResultTemplate: '<li><a href="{url}" title="PMD Java API">{title}</a></li>',
noResultsText: 'No results found.',
limit: 10,
fuzzy: true,
})
</script>
<!--end search-->
</li>
</ul>
</div>
</div>
<!-- /.container -->
</nav>
<!-- Page Content -->
<div class="container">
<div class="col-lg-12">&nbsp;</div>
<!-- Content Row -->
<div class="row">
<!-- Sidebar Column -->
<div class="col-md-3" id="tg-sb-sidebar">
<ul id="mysidebar" class="nav">
<li class="sidebarTitle">PMD 6.23.0</li>
<li>
<a href="#">About</a>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="pmd_release_notes.html">Release notes</a></li>
<li><a href="pmd_next_major_development.html">PMD 7.0.0 development</a></li>
<li><a href="pmd_about_help.html">Getting help</a></li>
</ul>
</li>
<li>
<a href="#">User Documentation</a>
<ul>
<li><a href="pmd_userdocs_installation.html">Installation and basic CLI usage</a></li>
<li><a href="pmd_userdocs_making_rulesets.html">Making rulesets</a></li>
<li><a href="pmd_userdocs_configuring_rules.html">Configuring rules</a></li>
<li><a href="pmd_userdocs_best_practices.html">Best practices</a></li>
<li><a href="pmd_userdocs_suppressing_warnings.html">Suppressing warnings</a></li>
<li><a href="pmd_userdocs_incremental_analysis.html">Incremental analysis</a></li>
<li><a href="pmd_userdocs_cli_reference.html">PMD CLI reference</a></li>
<li class="subfolders">
<a href="#">Extending PMD</a>
<ul>
<li><a href="pmd_userdocs_extending_writing_rules_intro.html">Introduction to writing rules</a></li>
<li><a href="pmd_userdocs_extending_your_first_rule.html">Your first rule</a></li>
<li><a href="pmd_userdocs_extending_writing_xpath_rules.html">XPath rules</a></li>
<li><a href="pmd_userdocs_extending_writing_java_rules.html">Java rules</a></li>
<li><a href="pmd_userdocs_extending_designer_reference.html">Rule designer reference</a></li>
<li><a href="pmd_userdocs_extending_defining_properties.html">Defining rule properties</a></li>
<li><a href="pmd_userdocs_extending_metrics_howto.html">Using and defining code metrics</a></li>
<li><a href="pmd_userdocs_extending_rule_guidelines.html">Rule guidelines</a></li>
<li><a href="pmd_userdocs_extending_testing.html">Testing your rules</a></li>
</ul>
</li>
<li><a href="pmd_userdocs_cpd.html">Copy-paste detection</a></li>
<li class="subfolders">
<a href="#">Tools / Integrations</a>
<ul>
<li><a href="pmd_userdocs_tools_maven.html">Maven PMD Plugin</a></li>
<li><a href="pmd_userdocs_tools_gradle.html">Gradle</a></li>
<li><a href="pmd_userdocs_tools_ant.html">Ant</a></li>
<li class="active"><a href="pmd_userdocs_tools_java_api.html">PMD Java API</a></li>
<li><a href="pmd_userdocs_tools_ci.html">CI integrations</a></li>
<li><a href="pmd_userdocs_tools.html">Other Tools / Integrations</a></li>
</ul>
</li>
</ul>
</li>
<li>
<a href="#">Rule Reference</a>
<ul>
<li class="subfolders">
<a href="#">Apex Rules</a>
<ul>
<li><a href="pmd_rules_apex.html">Index</a></li>
<li><a href="pmd_rules_apex_bestpractices.html">Best Practices</a></li>
<li><a href="pmd_rules_apex_codestyle.html">Code Style</a></li>
<li><a href="pmd_rules_apex_design.html">Design</a></li>
<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="#">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>
<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><a href="pmd_java_metrics_index.html">Java code metrics</a></li>
<li><a href="pmd_apex_metrics_index.html">Apex code metrics</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_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_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">
<div class="post-header">
<h1 class="post-title-main">PMD Java API</h1>
</div>
<div class="post-content">
<!-- this handles the automatic toc. use ## for subheads to auto-generate the on-page minitoc. if you use html tags, you must supply an ID for the heading element in order for it to appear in the minitoc. -->
<script>
$( document ).ready(function() {
// Handler for .ready() called.
$('#toc').toc({ minimumHeaders: 0, listType: 'ul', showSpeed: 0, headers: 'h2,h3,h4' });
});
</script>
<div id="toc"></div>
<a target="_blank" href="https://github.com/pmd/pmd/blob/master/docs/pages/pmd/userdocs/tools/java-api.md" class="btn btn-default githubEditButton" role="button"><i class="fa fa-github fa-lg"></i> Edit me</a>
<p>The easiest way to run PMD is to just use a build plugin in your favorite build tool
like <a href="pmd_userdocs_tools_ant.html">Apache Ant</a>, <a href="pmd_userdocs_tools_maven.html">Apache Maven</a> or
<a href="pmd_userdocs_tools_gradle.html">Gradle</a>.</p>
<p>There are also many integrations for IDEs available, see <a href="pmd_userdocs_tools.html">Tools</a>.</p>
<p>If you have your own build tool or want to integrate PMD in a different way, you can call PMD programmatically,
as described here.</p>
<h2 id="dependencies">Dependencies</h2>
<p>Youll need to add the dependency to the language, you want to analyze. For Java, it will be
<code class="highlighter-rouge">net.sourceforge.pmd:pmd-java</code>. If you use Maven, you can add a new (compile time) dependency like this:</p>
<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
<span class="nt">&lt;groupId&gt;</span>net.sourceforge.pmd<span class="nt">&lt;/groupId&gt;</span>
<span class="nt">&lt;artifactId&gt;</span>pmd-java<span class="nt">&lt;/artifactId&gt;</span>
<span class="nt">&lt;version&gt;</span>${pmdVersion}<span class="nt">&lt;/version&gt;</span>
<span class="nt">&lt;/dependency&gt;</span>
</code></pre></div></div>
<p>Note: Youll need to select a specific version. This is done in the example via the property <code class="highlighter-rouge">pmdVersion</code>.</p>
<p>This will transitively pull in the artifact <code class="highlighter-rouge">pmd-core</code> which contains the API.</p>
<h2 id="command-line-interface">Command line interface</h2>
<p>The easiest way is to call PMD with the same interface as from command line. The main class is
<code class="highlighter-rouge">net.sourceforge.pmd.PMD</code>:</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">net.sourceforge.pmd.PMD</span><span class="o">;</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">Example</span> <span class="o">{</span>
<span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
<span class="nc">String</span><span class="o">[]</span> <span class="n">pmdArgs</span> <span class="o">=</span> <span class="o">{</span>
<span class="s">"-d"</span><span class="o">,</span> <span class="s">"/home/workspace/src/main/java/code"</span><span class="o">,</span>
<span class="s">"-R"</span><span class="o">,</span> <span class="s">"rulesets/java/quickstart.xml"</span><span class="o">,</span>
<span class="s">"-f"</span><span class="o">,</span> <span class="s">"xml"</span><span class="o">,</span>
<span class="s">"-r"</span><span class="o">,</span> <span class="s">"/home/workspace/pmd-report.xml"</span>
<span class="o">};</span>
<span class="no">PMD</span><span class="o">.</span><span class="na">main</span><span class="o">(</span><span class="n">pmdArgs</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">}</span>
</code></pre></div></div>
<p>It uses the same options as described in <a href="pmd_userdocs_cli_reference.html">PMD CLI reference</a>.</p>
<h2 id="programmatically-variant-1">Programmatically, variant 1</h2>
<p>This is very similar:</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">net.sourceforge.pmd.PMD</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.PMDConfiguration</span><span class="o">;</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">PmdExample</span> <span class="o">{</span>
<span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
<span class="nc">PMDConfiguration</span> <span class="n">configuration</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">PMDConfiguration</span><span class="o">();</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setInputPaths</span><span class="o">(</span><span class="s">"/home/workspace/src/main/java/code"</span><span class="o">);</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setRuleSets</span><span class="o">(</span><span class="s">"rulesets/java/quickstart.xml"</span><span class="o">);</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setReportFormat</span><span class="o">(</span><span class="s">"xml"</span><span class="o">);</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setReportFile</span><span class="o">(</span><span class="s">"/home/workspace/pmd-report.xml"</span><span class="o">);</span>
<span class="no">PMD</span><span class="o">.</span><span class="na">doPMD</span><span class="o">(</span><span class="n">configuration</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">}</span>
</code></pre></div></div>
<h2 id="programmatically-variant-2">Programmatically, variant 2</h2>
<p>This gives you more control over which files are processed, but is also more complicated.
You can also provide your own listeners and renderers.</p>
<ol>
<li>
<p>First we create a <code class="highlighter-rouge">PMDConfiguration</code>. This is currently the only way to specify a ruleset:</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">PMDConfiguration</span> <span class="n">configuration</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">PMDConfiguration</span><span class="o">();</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setMinimumPriority</span><span class="o">(</span><span class="nc">RulePriority</span><span class="o">.</span><span class="na">MEDIUM</span><span class="o">);</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setRuleSets</span><span class="o">(</span><span class="s">"rulesets/java/quickstart.xml"</span><span class="o">);</span>
</code></pre></div> </div>
</li>
<li>
<p>In order to support type resolution, PMD needs to have access to the compiled classes and dependencies
as well. This is called “auxclasspath” and is also configured here.
Note: you can specify multiple class paths separated by <code class="highlighter-rouge">:</code> on Unix-systems or <code class="highlighter-rouge">;</code> under Windows.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">configuration</span><span class="o">.</span><span class="na">prependClasspath</span><span class="o">(</span><span class="s">"/home/workspace/target/classes:/home/.m2/repository/my/dependency.jar"</span><span class="o">);</span>
</code></pre></div> </div>
</li>
<li>
<p>Then we need a ruleset factory. This is created using the configuration, taking the minimum priority into
account:</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">RuleSetFactory</span> <span class="n">ruleSetFactory</span> <span class="o">=</span> <span class="nc">RulesetsFactoryUtils</span><span class="o">.</span><span class="na">createFactory</span><span class="o">(</span><span class="n">configuration</span><span class="o">);</span>
</code></pre></div> </div>
</li>
<li>
<p>PMD operates on a list of <code class="highlighter-rouge">DataSource</code>. You can assemble a own list of <code class="highlighter-rouge">FileDataSource</code>, e.g.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">List</span><span class="o">&lt;</span><span class="nc">DataSource</span><span class="o">&gt;</span> <span class="n">files</span> <span class="o">=</span> <span class="nc">Arrays</span><span class="o">.</span><span class="na">asList</span><span class="o">(</span><span class="k">new</span> <span class="nc">FileDataSource</span><span class="o">(</span><span class="k">new</span> <span class="nc">File</span><span class="o">(</span><span class="s">"/path/to/src/MyClass.java"</span><span class="o">)));</span>
</code></pre></div> </div>
</li>
<li>
<p>For reporting, you can use a built-in renderer, e.g. <code class="highlighter-rouge">XMLRenderer</code>. Note, that you must manually initialize
the renderer by setting a suitable <code class="highlighter-rouge">Writer</code> and calling <code class="highlighter-rouge">start()</code>. After the PMD run, you need to call
<code class="highlighter-rouge">end()</code> and <code class="highlighter-rouge">flush()</code>. Then your writer should have received all output.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">StringWriter</span> <span class="n">rendererOutput</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StringWriter</span><span class="o">();</span>
<span class="nc">Renderer</span> <span class="n">xmlRenderer</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">XMLRenderer</span><span class="o">(</span><span class="s">"UTF-8"</span><span class="o">);</span>
<span class="n">xmlRenderer</span><span class="o">.</span><span class="na">setWriter</span><span class="o">(</span><span class="n">rendererOutput</span><span class="o">);</span>
<span class="n">xmlRenderer</span><span class="o">.</span><span class="na">start</span><span class="o">();</span>
</code></pre></div> </div>
</li>
<li>
<p>Create a <code class="highlighter-rouge">RuleContext</code>. This is the context instance, that is available then in the rule implementations.
Note: when running in multi-threaded mode (which is the default), the rule context instance is cloned for
each thread.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">RuleContext</span> <span class="n">ctx</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">RuleContext</span><span class="o">();</span>
</code></pre></div> </div>
</li>
<li>
<p>Optionally register a report listener. This allows you to react immediately on found violations. You could also
use such a listener to implement your own renderer. The listener must implement the interface
<code class="highlighter-rouge">ThreadSafeReportListener</code> and can be registered via <code class="highlighter-rouge">ctx.getReport().addListener(...)</code>.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">ctx</span><span class="o">.</span><span class="na">getReport</span><span class="o">().</span><span class="na">addListener</span><span class="o">(</span><span class="k">new</span> <span class="nc">ThreadSafeReportListener</span><span class="o">()</span> <span class="o">{</span>
<span class="kd">public</span> <span class="kt">void</span> <span class="nf">ruleViolationAdded</span><span class="o">(</span><span class="nc">RuleViolation</span> <span class="n">ruleViolation</span><span class="o">)</span> <span class="o">{</span>
<span class="o">}</span>
<span class="kd">public</span> <span class="kt">void</span> <span class="nf">metricAdded</span><span class="o">(</span><span class="nc">Metric</span> <span class="n">metric</span><span class="o">)</span> <span class="o">{</span>
<span class="o">}</span>
</code></pre></div> </div>
</li>
<li>
<p>Now, all the preparations are done, and PMD can be executed. This is done by calling
<code class="highlighter-rouge">PMD.processFiles(...)</code>. This method call takes the configuration, the ruleset factory, the files
to process, the rule context and the list of renderers. Provide an empty list, if you dont want to use
any renderer. Note: The auxclasspath needs to be closed explicitly. Otherwise the class or jar files may
remain open and file resources are leaked.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">try</span> <span class="o">{</span>
<span class="no">PMD</span><span class="o">.</span><span class="na">processFiles</span><span class="o">(</span><span class="n">configuration</span><span class="o">,</span> <span class="n">ruleSetFactory</span><span class="o">,</span> <span class="n">files</span><span class="o">,</span> <span class="n">ctx</span><span class="o">,</span>
<span class="nc">Collections</span><span class="o">.</span><span class="na">singletonList</span><span class="o">(</span><span class="n">renderer</span><span class="o">));</span>
<span class="o">}</span> <span class="k">finally</span> <span class="o">{</span>
<span class="nc">ClassLoader</span> <span class="n">auxiliaryClassLoader</span> <span class="o">=</span> <span class="n">configuration</span><span class="o">.</span><span class="na">getClassLoader</span><span class="o">();</span>
<span class="k">if</span> <span class="o">(</span><span class="n">auxiliaryClassLoader</span> <span class="k">instanceof</span> <span class="nc">ClasspathClassLoader</span><span class="o">)</span> <span class="o">{</span>
<span class="o">((</span><span class="nc">ClasspathClassLoader</span><span class="o">)</span> <span class="n">auxiliaryClassLoader</span><span class="o">).</span><span class="na">close</span><span class="o">();</span>
<span class="o">}</span>
<span class="o">}</span>
</code></pre></div> </div>
</li>
<li>
<p>After the call, you need to finish the renderer via <code class="highlighter-rouge">end()</code> and <code class="highlighter-rouge">flush()</code>.
Then you can check the rendered output.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">renderer</span><span class="o">.</span><span class="na">end</span><span class="o">();</span>
<span class="n">renderer</span><span class="o">.</span><span class="na">flush</span><span class="o">();</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"Rendered Report:"</span><span class="o">);</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">rendererOutput</span><span class="o">.</span><span class="na">toString</span><span class="o">());</span>
</code></pre></div> </div>
</li>
</ol>
<p>Here is a complete example:</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">java.io.IOException</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.io.StringWriter</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.io.Writer</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.FileSystems</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.FileVisitResult</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.Files</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.Path</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.PathMatcher</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.SimpleFileVisitor</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.nio.file.attribute.BasicFileAttributes</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.util.ArrayList</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.util.Collections</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">java.util.List</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.PMD</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.PMDConfiguration</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.RuleContext</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.RulePriority</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.RuleSetFactory</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.RuleViolation</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.RulesetsFactoryUtils</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.ThreadSafeReportListener</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.renderers.Renderer</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.renderers.XMLRenderer</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.stat.Metric</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.util.ClasspathClassLoader</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.util.datasource.DataSource</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">net.sourceforge.pmd.util.datasource.FileDataSource</span><span class="o">;</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">PmdExample2</span> <span class="o">{</span>
<span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
<span class="nc">PMDConfiguration</span> <span class="n">configuration</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">PMDConfiguration</span><span class="o">();</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setMinimumPriority</span><span class="o">(</span><span class="nc">RulePriority</span><span class="o">.</span><span class="na">MEDIUM</span><span class="o">);</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">setRuleSets</span><span class="o">(</span><span class="s">"rulesets/java/quickstart.xml"</span><span class="o">);</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">prependClasspath</span><span class="o">(</span><span class="s">"/home/workspace/target/classes"</span><span class="o">);</span>
<span class="nc">RuleSetFactory</span> <span class="n">ruleSetFactory</span> <span class="o">=</span> <span class="nc">RulesetsFactoryUtils</span><span class="o">.</span><span class="na">createFactory</span><span class="o">(</span><span class="n">configuration</span><span class="o">);</span>
<span class="nc">List</span><span class="o">&lt;</span><span class="nc">DataSource</span><span class="o">&gt;</span> <span class="n">files</span> <span class="o">=</span> <span class="n">determineFiles</span><span class="o">(</span><span class="s">"/home/workspace/src/main/java/code"</span><span class="o">);</span>
<span class="nc">Writer</span> <span class="n">rendererOutput</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StringWriter</span><span class="o">();</span>
<span class="nc">Renderer</span> <span class="n">renderer</span> <span class="o">=</span> <span class="n">createRenderer</span><span class="o">(</span><span class="n">rendererOutput</span><span class="o">);</span>
<span class="n">renderer</span><span class="o">.</span><span class="na">start</span><span class="o">();</span>
<span class="nc">RuleContext</span> <span class="n">ctx</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">RuleContext</span><span class="o">();</span>
<span class="n">ctx</span><span class="o">.</span><span class="na">getReport</span><span class="o">().</span><span class="na">addListener</span><span class="o">(</span><span class="n">createReportListener</span><span class="o">());</span> <span class="c1">// alternative way to collect violations</span>
<span class="k">try</span> <span class="o">{</span>
<span class="no">PMD</span><span class="o">.</span><span class="na">processFiles</span><span class="o">(</span><span class="n">configuration</span><span class="o">,</span> <span class="n">ruleSetFactory</span><span class="o">,</span> <span class="n">files</span><span class="o">,</span> <span class="n">ctx</span><span class="o">,</span>
<span class="nc">Collections</span><span class="o">.</span><span class="na">singletonList</span><span class="o">(</span><span class="n">renderer</span><span class="o">));</span>
<span class="o">}</span> <span class="k">finally</span> <span class="o">{</span>
<span class="nc">ClassLoader</span> <span class="n">auxiliaryClassLoader</span> <span class="o">=</span> <span class="n">configuration</span><span class="o">.</span><span class="na">getClassLoader</span><span class="o">();</span>
<span class="k">if</span> <span class="o">(</span><span class="n">auxiliaryClassLoader</span> <span class="k">instanceof</span> <span class="nc">ClasspathClassLoader</span><span class="o">)</span> <span class="o">{</span>
<span class="o">((</span><span class="nc">ClasspathClassLoader</span><span class="o">)</span> <span class="n">auxiliaryClassLoader</span><span class="o">).</span><span class="na">close</span><span class="o">();</span>
<span class="o">}</span>
<span class="o">}</span>
<span class="n">renderer</span><span class="o">.</span><span class="na">end</span><span class="o">();</span>
<span class="n">renderer</span><span class="o">.</span><span class="na">flush</span><span class="o">();</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"Rendered Report:"</span><span class="o">);</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">rendererOutput</span><span class="o">.</span><span class="na">toString</span><span class="o">());</span>
<span class="o">}</span>
<span class="kd">private</span> <span class="kd">static</span> <span class="nc">ThreadSafeReportListener</span> <span class="nf">createReportListener</span><span class="o">()</span> <span class="o">{</span>
<span class="k">return</span> <span class="k">new</span> <span class="nf">ThreadSafeReportListener</span><span class="o">()</span> <span class="o">{</span>
<span class="nd">@Override</span>
<span class="kd">public</span> <span class="kt">void</span> <span class="nf">ruleViolationAdded</span><span class="o">(</span><span class="nc">RuleViolation</span> <span class="n">ruleViolation</span><span class="o">)</span> <span class="o">{</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">printf</span><span class="o">(</span><span class="s">"%-20s:%d %s%n"</span><span class="o">,</span> <span class="n">ruleViolation</span><span class="o">.</span><span class="na">getFilename</span><span class="o">(),</span>
<span class="n">ruleViolation</span><span class="o">.</span><span class="na">getBeginLine</span><span class="o">(),</span> <span class="n">ruleViolation</span><span class="o">.</span><span class="na">getDescription</span><span class="o">());</span>
<span class="o">}</span>
<span class="nd">@Override</span>
<span class="kd">public</span> <span class="kt">void</span> <span class="nf">metricAdded</span><span class="o">(</span><span class="nc">Metric</span> <span class="n">metric</span><span class="o">)</span> <span class="o">{</span>
<span class="c1">// ignored</span>
<span class="o">}</span>
<span class="o">};</span>
<span class="o">}</span>
<span class="kd">private</span> <span class="kd">static</span> <span class="nc">Renderer</span> <span class="nf">createRenderer</span><span class="o">(</span><span class="nc">Writer</span> <span class="n">writer</span><span class="o">)</span> <span class="o">{</span>
<span class="nc">XMLRenderer</span> <span class="n">xml</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">XMLRenderer</span><span class="o">(</span><span class="s">"UTF-8"</span><span class="o">);</span>
<span class="n">xml</span><span class="o">.</span><span class="na">setWriter</span><span class="o">(</span><span class="n">writer</span><span class="o">);</span>
<span class="k">return</span> <span class="n">xml</span><span class="o">;</span>
<span class="o">}</span>
<span class="kd">private</span> <span class="kd">static</span> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">DataSource</span><span class="o">&gt;</span> <span class="nf">determineFiles</span><span class="o">(</span><span class="nc">String</span> <span class="n">basePath</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
<span class="nc">Path</span> <span class="n">dirPath</span> <span class="o">=</span> <span class="nc">FileSystems</span><span class="o">.</span><span class="na">getDefault</span><span class="o">().</span><span class="na">getPath</span><span class="o">(</span><span class="n">basePath</span><span class="o">);</span>
<span class="nc">PathMatcher</span> <span class="n">matcher</span> <span class="o">=</span> <span class="nc">FileSystems</span><span class="o">.</span><span class="na">getDefault</span><span class="o">().</span><span class="na">getPathMatcher</span><span class="o">(</span><span class="s">"glob:*.java"</span><span class="o">);</span>
<span class="nc">List</span><span class="o">&lt;</span><span class="nc">DataSource</span><span class="o">&gt;</span> <span class="n">files</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">ArrayList</span><span class="o">&lt;&gt;();</span>
<span class="nc">Files</span><span class="o">.</span><span class="na">walkFileTree</span><span class="o">(</span><span class="n">dirPath</span><span class="o">,</span> <span class="k">new</span> <span class="nc">SimpleFileVisitor</span><span class="o">&lt;</span><span class="nc">Path</span><span class="o">&gt;()</span> <span class="o">{</span>
<span class="nd">@Override</span>
<span class="kd">public</span> <span class="nc">FileVisitResult</span> <span class="nf">visitFile</span><span class="o">(</span><span class="nc">Path</span> <span class="n">path</span><span class="o">,</span> <span class="nc">BasicFileAttributes</span> <span class="n">attrs</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="n">matcher</span><span class="o">.</span><span class="na">matches</span><span class="o">(</span><span class="n">path</span><span class="o">.</span><span class="na">getFileName</span><span class="o">()))</span> <span class="o">{</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">printf</span><span class="o">(</span><span class="s">"Using %s%n"</span><span class="o">,</span> <span class="n">path</span><span class="o">);</span>
<span class="n">files</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="k">new</span> <span class="nc">FileDataSource</span><span class="o">(</span><span class="n">path</span><span class="o">.</span><span class="na">toFile</span><span class="o">()));</span>
<span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">printf</span><span class="o">(</span><span class="s">"Ignoring %s%n"</span><span class="o">,</span> <span class="n">path</span><span class="o">);</span>
<span class="o">}</span>
<span class="k">return</span> <span class="kd">super</span><span class="o">.</span><span class="na">visitFile</span><span class="o">(</span><span class="n">path</span><span class="o">,</span> <span class="n">attrs</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">});</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">printf</span><span class="o">(</span><span class="s">"Analyzing %d files in %s%n"</span><span class="o">,</span> <span class="n">files</span><span class="o">.</span><span class="na">size</span><span class="o">(),</span> <span class="n">basePath</span><span class="o">);</span>
<span class="k">return</span> <span class="n">files</span><span class="o">;</span>
<span class="o">}</span>
<span class="o">}</span>
</code></pre></div></div>
<div class="tags">
<b>Tags: </b>
<a href="tag_userdocs.html" class="btn btn-default navbar-btn cursorNorm" role="button">userdocs</a>
<a href="tag_tools.html" class="btn btn-default navbar-btn cursorNorm" role="button">tools</a>
</div>
</div>
<hr class="shaded"/>
<footer>
<div class="row">
<div class="col-lg-12 footer">
&copy;2020 PMD Open Source Project. All rights reserved. <br />
Site last generated: Apr 18, 2020 <br />
<p><img src="images/pmd-logo-small.png" alt="Company logo"/></p>
</div>
</div>
</footer>
</div>
<!-- /.row -->
</div>
<!-- /.container -->
</div>
</div>
</body>
</html>