[java] CommentDefaultAccessModifierRule should consider constructors too

- Resolves #536

pmd-java/src/main/java/net/sourceforge/pmd/lang/java/rule/comments/CommentDefaultAccessModifierRule.java

@@ -12,6 +12,7 @@ import net.sourceforge.pmd.lang.java.ast.ASTAnnotation;
 import net.sourceforge.pmd.lang.java.ast.ASTClassOrInterfaceBodyDeclaration;
 import net.sourceforge.pmd.lang.java.ast.ASTClassOrInterfaceDeclaration;
 import net.sourceforge.pmd.lang.java.ast.ASTCompilationUnit;
+import net.sourceforge.pmd.lang.java.ast.ASTConstructorDeclaration;
 import net.sourceforge.pmd.lang.java.ast.ASTFieldDeclaration;
 import net.sourceforge.pmd.lang.java.ast.ASTMethodDeclaration;
 import net.sourceforge.pmd.lang.java.ast.ASTMethodDeclarator;
@@ -86,6 +87,14 @@ public class CommentDefaultAccessModifierRule extends AbstractCommentRule {
         return super.visit(decl, data);
     }
 
+    @Override
+    public Object visit(final ASTConstructorDeclaration decl, Object data) {
+        if (shouldReport(decl)) {
+            addViolationWithMessage(data, decl, String.format(MESSAGE, decl.getImage(), "constructor"));
+        }
+        return super.visit(decl, data);
+    }
+
     private boolean shouldReport(final AbstractJavaAccessNode decl) {
         List<ASTClassOrInterfaceDeclaration> parentClassOrInterface = decl
                 .getParentsOfType(ASTClassOrInterfaceDeclaration.class);

pmd-java/src/main/resources/rulesets/java/comments.xml

@@ -82,9 +82,9 @@ A rule for the politically correct... we don't want to offend anyone.
       message="Missing commented default access modifier"
       externalInfoUrl="${pmd.website.baseurl}/rules/java/comments.html#CommentDefaultAccessModifier">
     <description>
-        To avoid mistakes if we want that a Method, Field or Nested class have a default access modifier
-        we must add a comment at the beginning of the Method, Field or Nested class.
-        By default the comment must be /* default */, if you want another, you have to provide a regex.
+        To avoid mistakes if we want that a Method, Constructor, Field or Nested class have a default access modifier
+        we must add a comment at the beginning of it's declaration.
+        By default the comment must be /* default */, if you want another, you have to provide a regexp.
     </description>
     <priority>3</priority>
     <properties>

pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/comments/xml/CommentDefaultAccessModifier.xml

@@ -155,6 +155,28 @@ public enum TestEnum {
         <code><![CDATA[
 public class CommentDefaultAccessModifier {
     @VisibleForTesting void method() {}
+}
+        ]]></code>
+    </test-code>
+    
+    <test-code>
+        <description>#536 Constructor with default access modifier should trigger</description>
+        <expected-problems>1</expected-problems>
+        <code><![CDATA[
+public class Foo {
+    Foo() {}
+}
+        ]]></code>
+    </test-code>
+    
+    <test-code>
+        <description>#536 Enum constructor with implicit private modifier should not trigger</description>
+        <expected-problems>0</expected-problems>
+        <code><![CDATA[
+public enum Bar {
+    ONE, TWO;
+    
+    Bar() {}
 }
         ]]></code>
     </test-code>