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Recent Posts
Vaadin Forum1. Vaadin Flow - Java

FormBinder nested property

michel reuteler
1 decade ago Dec 29, 2011 9:47pm

I'm not able to bind nested attributes like

POJO Vendor

class Vendor{
  private String name;
  private Address address

  ...
  getters/setters
  ...
}

POJO Address

class Address{
  private String street;
  ...
  getters/setters
  ...
}

bind the form to the datasource

vendor = new Vendor();
vendor.setAddress(new Address());

form = new ViewBoundForm(new VendorFormView());
form.setImmediate(true);
form.setItemDataSource(new BeanItem<Vendor>(vendor));
formLayout.addComponent(form);

Form 1

@AutoGenerated
@PropertyId("address.street")
private TextField streetField;

Form 2

@AutoGenerated
private TextField streetField;

Form 1 and 2 are working for all not nested attributes like the vendors name.

Is there a way to bind nested attributes like Vendor.address.street?

Last updated on Dec, 29th 2011
Matti Tahvonen
1 decade ago Jan 30, 2012 8:52am

Hi,

I have never tried anything like this, but I think it should work if you first introduce the nested property in the BeanItem that you are assigning in to the form. Support for "nested properties" in BeanItems was introduced in Vaadin 6.6, but as far as I know it doesn't work automatically.

Something like this might do the trick:

vendorItem = new BeanItem(vendor);
vendorItem.addItemProperty("address.street", new NestedMethodProperty(vendor, "address.street"));

cheers,
matti

Eric Leray
1 decade ago Feb 08, 2012 8:28am

Quick comment on what Matti has suggested.

We have just put in place in one of our projects the NestedProperties in combination with FormBinder and it works perfectly.
One minor detail is eventually if you want to "automate" the binding and addition of nested properties. In such as case, here is a hint on how
to proceded. Here is an automatic way to add nested properties….

BeanItem<Person> personItem = new BeanItem<Person>(this.person);
    try {
      Map<String,String> beanMap = MyBeanUtils.recursiveDescribe(person);
      for (Entry<String, String> entry : beanMap.entrySet()) {
        personItem.addItemProperty(entry.getKey(), new NestedMethodProperty(this.person, entry.getKey()));
      }
    } catch (Exception e1) {
      throw new RuntimeException("Exception not handled: " + e1, e1);
    }

where MyBeanUtils is an adapatation of the following thread http://stackoverflow.com/questions/6133660/recursive-beanutils-describe

hope this may help.

E.

Last updated on Feb, 8th 2012
+1