When Tapestry creates a concrete implementation of an abstract setter
method it looks soemthing like this:
<property name="foo"/>
public abstact void setFoo(MyFooClass newFoo);
concrete:
public void setFoo(MyFooClass newFoo) {
$_foo = newFoo;
fireObservedChange("foo", newFoo);
}
so, every call to setFoo() fires a change event.
Geoff
On 3/6/06, Daniel M Garland <[EMAIL PROTECTED]> wrote:
> Hi
>
> If I have a property x, that is populated by my controller class by a
> database operation that builds some object, how does Tapestry observe
> changes to that property? e.g. If I delegate property creation to
> Tapestry by using a <property> in the template, and an abstract method
> signature, how does Tapestry know when the property changes?
>
> 1) Does it actually check, or does a call to getX() actually invoke the
> controller each time, goto the database each time, build the object each
> time?
> 2) Or does it figure out that it hasn't changed?
> 3) If not, do I have to write my own properties in Tapestry (and avoid
> the automatic generation), if so, how do I inform the observer that the
> property has changed?
>
> Thanks in advance
> --
> Dan Garland
> ------------------------
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>
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