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Tapestry 5 presist properties

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I am starting a new small project so I thought it would be a good idea to test a new framework so I decided to change to tapestry 5.

I read that the properties used on the page are cleared on each request. It seems that it is partially truth. If I use String or native properties this happens, I change the value on a form, receive the value correctly and when the page is displayed again it is cleared. If I use the Persist annotation I can keep the value.

The problem is when I use Object properties. For example, if I have on a Page:

private Address address=new Address;

public Address getAddress(){ return address;}
public void setAddress(Address add){this.address=add;}

And on the template page:
<input t:type="textfield" t:id="street" t:value="address.street"/>

if I submit the form and display the same page again, the property Address just keeps the street info. And even worst, if I open the same page on another machine, the application displays the values introduced by the first user :|.

I know that pages are pooled, so this may be the problem. In this particular case I am not using the beanformeditor because the Address object has a State Object as a property so the BeanFormEditor dose not display well the form.

Is there a way (maybe an annotation) to tell tapestry to treat this bean as the other properties ?.

Thank you (By the way, I hope I could explain my problem, my English is not good enough)
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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