Adding a data class

The getNotes() method, for now, returns just a string with the value Work in progress. This is not the list of notes we expect. To be able to return notes, we must define it. Create a new package called data with a Note member class. Make sure it is defined as follows:

package com.journaler.api.data 
data class Note( 
        var id: String = ,"" 
        var title: String, 
        var message: String, 
         
var location: String = "" 
) 

This is an ordinary Kotlin data class. We defined the Note class as the class with three mandatory fields and one optional field. Update NoteController so that it returns us two hardcoded notes:

@RestController 
@RequestMapping("/notes") 
class NoteController { 
 
    @GetMapping( 
            value = "/obtain", 
            produces = arrayOf(MediaType.APPLICATION_JSON_VALUE) ...