Spring validator: Validating a list of nested objects

Just a code snippet on validating nested objects in java using Spring.

class MyForm() {
    String myName;
    List<TypeA> listObjects;
}
class TypeA() {
    String number;
    String value;
}
 
public class MyFormValidator implements Validator {
 
    private TypeAValidator typeAValidator;
 
    @Override
    public boolean supports(Class clazz) {
        return MyForm.class.equals(clazz);
    }
 
    @Override
    public void validate(Object target, Errors errors) {
        MyForm myForm = (MyForm) target;
        typeAValidator = new TypeAValidator();
 
        int idx = 0;
        for (TypeA item : myForm.getListObjects()) {
 
            errors.pushNestedPath("listObjects[" + idx + "]");
            ValidationUtils.invokeValidator(this.typeAValidator, item, errors);
            errors.popNestedPath();
            idx++;
 
            ...
        }
 
        ...
    }
}
 
public class TypeAValidator implements Validator{
 
    @Override
    public boolean supports(Class<?> clazz) {
        return TypeA.class.isAssignableFrom(clazz);
    }
 
    @Override
    public void validate(Object target, Errors errors) {
        TypeA objTypeA = (TypeA)target;
 
        ValidationUtils.rejectIfEmpty(errors, "number", "number.notEmpty");
    }
}