PMD Xpath, how to compare 2 @Image?

Question

It's is pretty easy to compare one path's @Image to a static string but how to compare 2 paths'@Image ?

Code that should trigger the rule :

public class Foo implements {
      public String checkDBConnexion() {
        try {
            int result = jdbcTemplate.queryForObject("SELECT 1 FROM dual ", Integer.class);

        } catch (DataAccessException e) {
            // This is Ok : throw new MyException(test, e);
            // this is not : hrow new MyException(test);
            // This is also not ok if there are no thrown;
            return "KO : " + e.getMessage();
        }
    }
}

Xpath for the param name of the Catch block :

//CatchStatement[//FormalParameter//VariableDeclaratorId]

Xpath for the variable name of the thrown method :

//ThrowStatement//Arguments//Expression//Name

It's easy to compare both to 'e' :

//CatchStatement[//FormalParameter//VariableDeclaratorId[@Image = 'e']]

//CatchStatement[//ThrowStatement//Arguments//Expression//Name[@Image = 'e']]

How do I compare them with eachother ?

Also if you have a link with detailled PMD XPath synthax exemple. The basic PMD page has ... well the basic ;)

TheBakker TheBakker · Accepted Answer · 2016-06-30T08:10:54

Answering myself :

//CatchStatement[//FormalParameter//VariableDeclaratorId/@Image = 
//ThrowStatement//Arguments//Expression//Name/@Image]

PMD Xpath, how to compare 2 @Image?

1 Answers