PMD rule to enforce Guice AOP limitations (untested)

TimedRule.java

package org.apache.aurora.pmd;

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.ASTMethodDeclaration;
import net.sourceforge.pmd.lang.java.ast.ASTName;
import net.sourceforge.pmd.lang.java.rule.AbstractJavaRule;
import net.sourceforge.pmd.lang.symboltable.NameDeclaration;

/**
 * Check for appropriate use of the timed interceptor.
 */
public class TimedRule extends AbstractJavaRule {
  @Override
  public Object visit(ASTMethodDeclaration node, Object data) {
    boolean hasTimedAnnotation = false;
    ASTClassOrInterfaceBodyDeclaration declaration =
        node.getFirstParentOfType(ASTClassOrInterfaceBodyDeclaration.class);
    for (ASTAnnotation astAnnotation : declaration.findChildrenOfType(ASTAnnotation.class)) {
      ASTName name = astAnnotation.getFirstDescendantOfType(ASTName.class);
      if (name != null) {
        NameDeclaration nameDeclaration = name.getNameDeclaration();
        if (nameDeclaration != null && "Timed".equals(name.getNameDeclaration().getName())) {
          hasTimedAnnotation = true;
          break;
        }
      }
    }

    if (hasTimedAnnotation && node.isPrivate()) {
      addViolationWithMessage(data, node, "@Timed annotation is not allowed on private methods.");
    }

    if (hasTimedAnnotation && node.isStatic()) {
      addViolationWithMessage(data, node, "@Timed annotation is not allowed on static methods.");
    }

    if (hasTimedAnnotation && node.isFinal()) {
      addViolationWithMessage(data, node, "@Timed annotation is not allowed on final methods.");
    }

    if (hasTimedAnnotation) {
      ASTClassOrInterfaceDeclaration classDeclaration =
          node.getFirstParentOfType(ASTClassOrInterfaceDeclaration.class);

      if (classDeclaration != null) {
        if (classDeclaration.isFinal()) {
          addViolationWithMessage(data, classDeclaration,
              "@Timed annotation is not allowed on final classes.");
        }

        if (!(classDeclaration.isPublic() || classDeclaration.isPackagePrivate())) {
          addViolationWithMessage(data, classDeclaration,
              "@Timed annotation is only allowed on methods of public or package-private classes.");
        }
      }
    }

    return super.visit(node, data);
  }
}