import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class App {

    public static void main(String[] args) throws Exception {
        System.out.println("REST API lekérés");

        URL url = new URL("http://localhost:3000/employees");
        HttpURLConnection http = (HttpURLConnection) url.openConnection();
        http.setRequestMethod("GET");
        http.connect();

        String text = null;
        int responseCode = http.getResponseCode();
        if (responseCode != 200) {
            throw new RuntimeException("Http válasz: " + responseCode);
        }else {
            text = new String(
                http.getInputStream().readAllBytes(), 
                StandardCharsets.UTF_8);
        }

        GsonBuilder builder = new GsonBuilder();
        builder.setPrettyPrinting();
        Gson gson = builder.create();
        
        Employee[] employeeArray = gson.fromJson(text, Employee[].class);
        ArrayList<Employee> list = new ArrayList<>(Arrays.asList(employeeArray));

        for(Employee employee: list) {
            System.out.println(employee.name);
        }
        
    }
}