Ignore javacc code in coverage report (#5241)

Merge pull request #5241 from Monits:ignore-javacc-code

docs/pages/release_notes.md

@@ -37,6 +37,7 @@ The old rule names still work but are deprecated.
 
 ### ✨ Merged pull requests
 * [#4965](https://github.com/pmd/pmd/pull/4965): \[java] Rename JUnit rules with overly restrictive names - [Juan Martín Sotuyo Dodero](https://github.com/jsotuyod) (@jsotuyod)
+* [#5241](https://github.com/pmd/pmd/pull/5241): \Ignore javacc code in coverage report - [Juan Martín Sotuyo Dodero](https://github.com/jsotuyod) (@jsotuyod)
 
 {% endtocmaker %}
 

javacc-wrapper.xml

@@ -224,6 +224,9 @@
 
     <target name="cleanup-parser" unless="jjtreeBuildNotRequired">
 
+        <replace token="class ${parser-name}" value='@net.sourceforge.pmd.annotation.Generated("org.javacc.javacc")${line.separator}class ${parser-name}'>
+            <file name="${parser-file}" />
+        </replace>
 
         <replace token="new Token()" value="token_source.input_stream.getTokenDocument().open()">
             <file name="${parser-file}" />
@@ -262,7 +265,8 @@
 
         <replaceregexp>
             <regexp pattern="public interface"/>
-            <substitution expression="interface"/>
+            <substitution expression='@net.sourceforge.pmd.annotation.Generated("org.javacc.javacc")${line.separator}
+interface'/>
             <file name="${target-package-dir}/${parser-name}TreeConstants.java" />
         </replaceregexp>
 
@@ -272,7 +276,8 @@
 
         <replaceregexp>
             <regexp pattern='(public )?class ${tokenmgr-name}' />
-            <substitution expression='class ${tokenmgr-name} extends ${base-tokenmgr}' />
+            <substitution expression='@net.sourceforge.pmd.annotation.Generated("org.javacc.javacc")${line.separator}
+class ${tokenmgr-name} extends ${base-tokenmgr}' />
             <file name="${tokenmgr-file}" />
         </replaceregexp>
 
@@ -385,11 +390,12 @@
 
         <replaceregexp>
             <regexp pattern="(public )?interface ${constants-itf-name} \{" />
-            <substitution expression="/** Token kinds ({@link ${ast-impl-package}.JavaccToken#kind}) for this language. */${line.separator}
+            <substitution expression='/** Token kinds ({@link ${ast-impl-package}.JavaccToken#kind}) for this language. */${line.separator}
 @net.sourceforge.pmd.annotation.InternalApi${line.separator}
+@net.sourceforge.pmd.annotation.Generated("org.javacc.javacc")${line.separator}
 public final class ${token-constants-name} \{${line.separator}
     private ${token-constants-name}() { /* Utility class */ }${line.separator}
-"/>
+'/>
             <file name="${token-constants-file}" />
         </replaceregexp>
 
@@ -534,8 +540,9 @@ public final class ${token-constants-name} \{${line.separator}
     <target name="default-visitor" depends="jjtree" unless="jjtreeBuildNotRequired">
         <move file="${target-package-dir}/${gen-visitor-name}.java" tofile="${generic-visitor-interface-file}" />
         <replace file="${generic-visitor-interface-file}">
-            <replacefilter token="${gen-visitor-name}"
-                           value="${generic-visitor-interface-name}&lt;P, R> extends ${ast-api-package}.AstVisitor&lt;P, R>" />
+            <replacefilter token="public interface ${gen-visitor-name}"
+                           value='@net.sourceforge.pmd.annotation.Generated("org.javacc.javacc")${line.separator}
+public interface ${generic-visitor-interface-name}&lt;P, R> extends ${ast-api-package}.AstVisitor&lt;P, R>' />
 
             <replacefilter token="SimpleNode" value="${node-name}" />
             <!-- Root method, eg visitJavaNode -->

pmd-core/src/main/java/net/sourceforge/pmd/annotation/Generated.java

@@ -0,0 +1,23 @@
+/*
+ * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
+ */
+
+package net.sourceforge.pmd.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Marks a class as generated code, and therefore to be ignored for code coverage purposes.
+ *
+ * @since 7.6.0
+ */
+@Retention(RetentionPolicy.CLASS)
+@Documented
+public @interface Generated {
+
+    /** The generator that produced this code */
+    String value() default "";
+
+}

pom.xml

@@ -611,7 +611,7 @@
                 <plugin>
                     <groupId>org.jacoco</groupId>
                     <artifactId>jacoco-maven-plugin</artifactId>
-                    <version>0.8.11</version>
+                    <version>0.8.12</version>
                 </plugin>
                 <plugin>
                     <groupId>org.cyclonedx</groupId>