I have some questions about linksubmit/submit in a loop. I have some enums
{e1, e2, e3} for example. In the loop I generate a linksubmit for each enum
and pass the enum in the linksubmit context parameter and an event called
"handleEnum" in the event parameter. From what I understand, theoretically
this linksubmit should generate a call to my "handleEnum" event handler so
I can set some properties and then later the onSuccess event handler method
should be invoked and .
However 3 things happened that I didn't expect:
1) The context expression "oneEnum" always evaluated to the last value of
the loop (e3) and only my ha ndleEnum method was called. When I converted
the LinkSubmit to a EventLink, this worked fine.
2) my onSuccess method was never called. When I moved the onSuccess method
form the component to the page where the form was defined, it was called.
3) I noticed that in my onSuccess method, the parameter "handler" was null.
On a submit, when are parameters re-bound? In Tapestry4, after a form
submission, the rewind was rebuilt from the encoded form state and all
components had their params rebound with the correct values and I was able
to access my parameters in my form submit listener methods.
I am still learning tapestry 5 but can anyone explain these behaviors and
perhaps suggest a better method of getting what I want accomplished? I
pasted the relevant code below.
The code is based on:
http://tapestry.apache.org/current/tapestry-core/ref/org/apache/tapestry5/corelib/components/Submit.html
inside a component I have:
<ul>
<t:loop source="someEnums" value="oneEnum">
<li>
name of oneEnum
</li>
</t:loop>
</ul>
and:
public enum MyEnum {e1, e2, e3}
@Parameter
private Handler handler;
@Property
private MyEnum oneEnum;
@Property
private MyEnum selectedEnum;
public MyEnum[] getSomeEnums()
{return MyEnum.values();}
@SuppressWarnings("unused")
@Component(parameters = {"event=enumHandle", "context=oneEnum"})
private LinkSubmit linkEnum;
@OnEvent(value = "enumHandle")
void handleEnumClick(String oneEnum) //oneEnum is always e3
{
selectedEnum = MyEnum.valueof(oneEnum);
}
Object onSuccess() //is not called unless I move to page class
{
handler.handle(selectedEnum); //the handler parameter is null
return null;
}
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