object replacenull

모델객체들 if~ elseif~ null 체크할 필요없어서 편함

static void fillNullObjects(Object object) {
    Field[] fields = object.getClass().getDeclaredFields();
    for (Field field : fields) {
        try {

            field.setAccessible(true);
            if (field.get(object) != null) {
                continue;
            }
            else if (field.getType().equals(Integer.class)) {
                field.set(object, 0);
            }
            else if (field.getType().equals(String.class)) {
                field.set(object, "");
            }
            else if (field.getType().equals(Boolean.class)){
                field.set(object, false);
            }
            else if (field.getType().equals(Character.class)) {
                field.set(object, '\u0000');
            }
            else if (field.getType().equals(Byte.class)) {
                field.set(object, (byte) 0);
            }
            else if (field.getType().equals(Float.class)) {
                field.set(object, 0.0f);
            }
            else if (field.getType().equals(Double.class)) {
                field.set(object, 0.0d);
            }
            else if (field.getType().equals(Short.class)) {
                field.set(object, (short) 0);
            }
            else if (field.getType().equals(Long.class)) {
                field.set(object, 0L);
            }
            else if (field.getType().getDeclaredFields().length > 0){
                for (Constructor<?> constructor : field.getClass().getConstructors()) {
                    if (constructor.getParameterTypes().length == 0) {
                        field.set(object, constructor.newInstance());
                        fillNullObjects(field.get(object));
                    }
                }
            }
       } catch (IllegalAccessException | InstantiationException | InvocationTargetException e) {
            e.printStackTrace();
        }
    }
}