DevicesController.java

package ui.controllers;

import javafx.fxml.FXML;
import javafx.stage.Window;
import org.springframework.beans.factory.annotation.Autowired;
import ui.AutowiredFXMLStage;
import ui.Controller;
import ui.FXMLLoader;
import ui.FXMLStage;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.net.URL;

@Controller
public class DevicesController {
    private FXMLStage newDeviceFormStage;

    private final URL newDeviceFormLocation = getClass().getResource(
            "/modals/NewDevice.fxml"
    );

    @Autowired
    private FXMLStage applicationStage;

    @Autowired
    private FXMLLoader fxmlLoader;

    @PostConstruct
    public void setUp() throws IOException {
        configureNewDeviceFormStage();
    }

    @FXML public void displayNewDeviceForm(){
        newDeviceFormStage.show();
    }

    private void configureNewDeviceFormStage() throws IOException {
        newDeviceFormStage = new AutowiredFXMLStage(
                newDeviceFormLocation, castStageToWindow(applicationStage)
        );
        newDeviceFormStage.setFXMLLoader(fxmlLoader);
        newDeviceFormStage.loadFXML();
    }

    private static Window castStageToWindow(FXMLStage stage){
        return (Window) stage;
    }
}