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» PMD Java API
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href="https://github.com/pmd/pmd/blob/master/docs/pages/pmd/userdocs/tools/java-api.md"
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<h1 class="post-title-main">PMD Java API</h1>
</div>
<div class="post-content" data-github-edit-url="https://github.com/pmd/pmd/blob/master/docs/pages/pmd/userdocs/tools/java-api.md">
<div id="inline-toc"><!-- empty, move TOC here when screen size too small --></div>
<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="language-plaintext 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="language-plaintext highlighter-rouge">pmdVersion</code>.</p>
<p>This will transitively pull in the artifact <code class="language-plaintext 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="language-plaintext 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">addRuleSet</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">runPmd</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 custom renderers.</p>
<ol>
<li>
<p>First we create a <code class="language-plaintext highlighter-rouge">PMDConfiguration</code> and configure it, first the rules:</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">addRuleSet</span><span class="o">(</span><span class="s">"rulesets/java/quickstart.xml"</span><span class="o">);</span>
</code></pre></div> </div>
</li>
<li>
<p>Then we configure, which paths to analyze:</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">setInputPaths</span><span class="o">(</span><span class="s">"/home/workspace/src/main/java/code"</span><span class="o">);</span>
</code></pre></div> </div>
</li>
<li>
<p>The we configure the default language version for Java. And 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.</p>
<p>Note: you can specify multiple class paths separated by <code class="language-plaintext highlighter-rouge">:</code> on Unix-systems or <code class="language-plaintext 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">setDefaultLanguageVersion</span><span class="o">(</span><span class="nc">LanguageRegistry</span><span class="o">.</span><span class="na">findLanguageByTerseName</span><span class="o">(</span><span class="s">"java"</span><span class="o">).</span><span class="na">getVersion</span><span class="o">(</span><span class="s">"11"</span><span class="o">));</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">prependAuxClasspath</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 configure the reporting. Configuring the report file is optional. If not specified, the report
will be written to <code class="language-plaintext highlighter-rouge">stdout</code>.</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">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>
</code></pre></div> </div>
</li>
<li>
<p>Now an optional step: If you want to use additional renderers as in the example, set them up before
calling PMD. You can use a built-in renderer, e.g. <code class="language-plaintext highlighter-rouge">XMLRenderer</code> or a custom renderer implementing
<code class="language-plaintext highlighter-rouge">Renderer</code>. Note, that you must manually initialize the renderer by setting a suitable <code class="language-plaintext highlighter-rouge">Writer</code>:</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><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="c1">// ...</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>
</code></pre></div> </div>
</li>
<li>
<p>Finally we can start the PMD analysis. There is the possibility to fine-tune the configuration
by adding additional files to analyze or adding additional rulesets or renderers:</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="nc">PmdAnalysis</span> <span class="n">pmd</span> <span class="o">=</span> <span class="nc">PmdAnalysis</span><span class="o">.</span><span class="na">create</span><span class="o">(</span><span class="n">configuration</span><span class="o">))</span> <span class="o">{</span>
<span class="c1">// optional: add more rulesets</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">addRuleSet</span><span class="o">(</span><span class="n">pmd</span><span class="o">.</span><span class="na">newRuleSetLoader</span><span class="o">().</span><span class="na">loadFromResource</span><span class="o">(</span><span class="s">"custom-ruleset.xml"</span><span class="o">));</span>
<span class="c1">// optional: add more files</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">files</span><span class="o">().</span><span class="na">addFile</span><span class="o">(</span><span class="nc">Paths</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="s">"src"</span><span class="o">,</span> <span class="s">"main"</span><span class="o">,</span> <span class="s">"more-java"</span><span class="o">,</span> <span class="s">"ExtraSource.java"</span><span class="o">));</span>
<span class="c1">// optional: add more renderers</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">addRenderer</span><span class="o">(</span><span class="n">renderer</span><span class="o">);</span>
<span class="c1">// or just call PMD</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">performAnalysis</span><span class="o">();</span>
<span class="o">}</span>
</code></pre></div> </div>
<p>The renderer will be automatically flushed and closed at the end of the analysis.</p>
</li>
<li>
<p>Then you can check the rendered output.</p>
<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><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.Paths</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.PmdAnalysis</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.lang.LanguageRegistry</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="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">addRuleSet</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">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">setDefaultLanguageVersion</span><span class="o">(</span><span class="nc">LanguageRegistry</span><span class="o">.</span><span class="na">findLanguageByTerseName</span><span class="o">(</span><span class="s">"java"</span><span class="o">).</span><span class="na">getVersion</span><span class="o">(</span><span class="s">"11"</span><span class="o">));</span>
<span class="n">configuration</span><span class="o">.</span><span class="na">prependAuxClasspath</span><span class="o">(</span><span class="s">"/home/workspace/target/classes"</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="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="k">try</span> <span class="o">(</span><span class="nc">PmdAnalysis</span> <span class="n">pmd</span> <span class="o">=</span> <span class="nc">PmdAnalysis</span><span class="o">.</span><span class="na">create</span><span class="o">(</span><span class="n">configuration</span><span class="o">))</span> <span class="o">{</span>
<span class="c1">// optional: add more rulesets</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">addRuleSet</span><span class="o">(</span><span class="n">pmd</span><span class="o">.</span><span class="na">newRuleSetLoader</span><span class="o">().</span><span class="na">loadFromResource</span><span class="o">(</span><span class="s">"custom-ruleset.xml"</span><span class="o">));</span>
<span class="c1">// optional: add more files</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">files</span><span class="o">().</span><span class="na">addFile</span><span class="o">(</span><span class="nc">Paths</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="s">"src"</span><span class="o">,</span> <span class="s">"main"</span><span class="o">,</span> <span class="s">"more-java"</span><span class="o">,</span> <span class="s">"ExtraSource.java"</span><span class="o">));</span>
<span class="c1">// optional: add more renderers</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">addRenderer</span><span class="o">(</span><span class="n">renderer</span><span class="o">);</span>
<span class="c1">// or just call PMD</span>
<span class="n">pmd</span><span class="o">.</span><span class="na">performAnalysis</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">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">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="o">}</span>
</code></pre></div></div>
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