ObjectAction

public class ObjectAction extends ActionSupport implements Preparable {

    /** Serial version UID. */
    private static final long serialVersionUID = 8225105390632222245L;

    /** The current exam */
    private Object object;

    /** The object's identifier selected by the user */
    private Long objectId;

    /** The AttachedObject that was edited/added */
    private AttachedObject attachedObject;

    /** The object service. */
    @Autowired
    private ObjectService objectService;

    private ArrayList<String> ojectTypes;

    @Override
    public void prepare() throws Exception {
        objectTypes = new ArrayList<String>();
        ObjectType[] allTypes = ObjectType.values();
        for (ObjectType objectType : allTypes) {
            objectTypes.add(objectType.toString());
        }

        Long id = 0l;
        if (examId != null) {
            id = objectId;
        } else if (attachedObject != null) {
            id = attachedObject.getObject().getId();
        }
        if (id == (long) 0) {
        } else {
            object = objectService.loadObject(id);
        }
    }

    /**
     * Saves the object to the database.
     *
     * @return the result string.
     */
    public String save() {
        objectService.saveObject(object);
        return SUCCESS;
    }

    /**
     * Deletes the selected object from the database.
     *
     * @return the result string.
     */
    public String delete() {
        exam = objectService.loadObject(objectId);
        if (object != null) {
            objectService.deleteObject(object);
        }
        return SUCCESS;
    }

        /**
     * Displays the selected object in the object form.
     *
     * @return the result string.
     */
    public String load() {
        return SUCCESS;
    }

    public String cancel() {
        return SUCCESS;
    }

    @Override
    public void validate() {
        // If the object is not set, the object ID has to be set.
        if (object == null && objectId == null) {
            if (attachedObject == null) {
                addActionError(getText("msg.selectObject"));
            }
        }
    }

    /** all getters and setters */