Beanutils.copyProperties with protected set method

Question

Is there a way to make BeanUtils works with a protected setXXX(X x) method? Or do you know some alternative to do this?

Something like:

public class A{
    private String text;

    public String getText(){
         return this.text;
    }
    protected void setText(String text){
         this.text = text;
    }
}
public class B{
    private String text;

    public String getText(){
         return this.text;
    }
    protected void setText(String text){
         this.text = text;
    }
}

public static void main(String[] args){
     A a = new A();
     a.setText("A text");
     B b = new B();
     BeanUtils.copyProperties(b, a);
     System.out.println(b.getText()); //A text
}

score 3 · Answer 1 · edited Dec 16 '20 at 13:57

3

Try to use the BULL (Bean Utils Light Library)

public static void main(String[] args) {
   A a = new A();
   a.setText("A text");
   B b = BeanUtils.getTransformer(B.class).apply(a);     
   System.out.println(b.getText()); //A text
}

edited Dec 16 '20 at 13:57

Nick

3,691
18
36

answered Dec 16 '20 at 12:53

Kleber Ferreira

31
1
6

1

Fun fact, creators of this are my colleagues :) Happy to see it is suggested – rascio Dec 16 '20 at 14:59

score 1 · Answer 2 · answered May 01 '15 at 17:49

Well, too bad class MethodUtils that BeanUtils use to get the methods is check whether to only accept a public method. So, I don't think there is a straight forward way to make bean utils to get the protected method.

But, of course, you can use reflection to populate the fields like this.

for (Field field : a.getClass().getDeclaredFields()) {
    for (Method method : b.getClass().getDeclaredMethods()) {
        method.setAccessible(true);
        String fieldName = Character.toUpperCase(field.getName().charAt(0)) + field.getName().substring(1);
        if (method.getName().equals("set" + fieldName)) {
            method.invoke(b, a.getClass().getMethod("get" + fieldName).invoke(a));
            }
        }
     }
}

Yes, but it is a little more complex than this, because `getDeclaredFields` gives you just the fields of the class but not those of its _supertype_. `BeanUtils` read the entire hierarchy and copy also those fields — rascio, May 01 '15 at 18:07
Yes, you're right, if you want to get the fields of its __supertype__, then you need to `getSuperClass()` all the way until it hit class `Object`. — kucing_terbang, May 01 '15 at 18:11

Beanutils.copyProperties with protected set method

2 Answers2