How to automate Methods mapping between two java classes?

Question

I have a legacy springMvc project and i want to refactor all the controllers to return ResponseEntity object rather then returning Model object which is returned by default.

I am looking for a way to map functions in Map class to ResponseEntity class .

I have seen people recommend to use Regular expression as a solution to refactor all the methods.

I need to know your opinion about implementing Regex as solution in terms of advantages / drawbacks for using regex in this scenario.

In addition it would be helpful if you can suggest other solutions.

please take a look at the attached code for more details.

return Model object to the view

@GetMapping("/getData")
    public String getData(Model model) {
       
        model.addAttribute("message", "springMvc");
        
        return "viewPage";
    }

return ResponseEntity object as a json format

@GetMapping("/getData")
    public ResponseEntity<Map<String,String>>  getData() {

        Map<String,String> map = new  HashMap<>();
        map.put("message", "springMvc");
       
        return  new ResponseEntity.Ok().body(map);
    }

Are there any HTML files in this legacy Spring MVC project ? The return "viewPage"; indicates that a view (HTML-template) is filled with the previously prepared model (that's "MVC"). What is your plan to change / refactor? — hc_dev
– hc_dev, Commented Nov 5, 2020 at 20:54
There are HTML files but the frontend will be rebuild using angular. I just need to refactor my controller to return json instead of model views. — Cheikh Ahmed
– Cheikh Ahmed, Commented Nov 5, 2020 at 20:57
@ggr because i want the controller to return only responseEntity (json object) so it can be consumed by angular in the frontend. — Cheikh Ahmed
– Cheikh Ahmed, Commented Nov 5, 2020 at 21:13

Cheikh Ahmed · Accepted Answer · 2020-11-10 17:56:08Z

1

In case this problem is faced by someone in the future i would like to share that I have found a convenient way to do the refactoring of the code by using AST (Abstract Syntax Tree) which gives you a lot more control over the code comparing to using Regex.

you can check the library repository :

https://github.com/javaparser/javaparser

Note that AST is used by IDEs and Static analysis tools such as SonarQube

answered Nov 10, 2020 at 17:56

Cheikh Ahmed

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Comments

jpl · Accepted Answer · 2020-11-14 19:59:10Z

0

Regex cannot be used in your context. There are certainly too many special cases to change, it is not just a question of changing a string. JavaParser is a good candidate.

answered Nov 14, 2020 at 19:59

jpl

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1 Comment

Cheikh Ahmed Over a year ago

That what i have found thnks for confirming that.

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