I'm brand-new to Tapestry. I've read the tapestry-user list back
through the beginning of the month (200 messages already!) I've been
through a basic tutorial, and can do some simple things with Tapestry,
but I haven't yet really gotten a feel for it. I suspect the question
below is pretty naive, but I'm hoping someone has a few minutes to
either suggest a solution or point me to an appropriate reference. BTW,
although new to Tapestry, I'm fairly experienced with Java and XML, and
have used several other web framworks (Struts, SpringMVC).
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I want to create links to external pages based on internal data. The
url parameters would be based on data stored in one of my objects. In
PHP or JSP I would use processing instructions inside the href attribute
of my template to grab the data. I'm not sure how to do it here.
More specifically, I'm used to doing something like (in some pseudo-app
syntax):
<p>View this location in <a
href="http://maps.google.com/maps?q=<?location.address.line?>+<?location.address.city?>+<?location.address.state?>+<?location.address.zip?>">Google
Maps</a>
or <a
href="http://maps.yahoo.com/maps_result?addr=<?location.address.line?>&csz=<?location.address.city?>+<?location.address.state?>+<?location.address.zip?>&country=us">Yahoo
Maps</a>
or <a
href="http://www.mapquest.com/maps/map.adp?country=US&addtohistory=&searchtab=home&address=<?location.address.line?>&<?location.address.city?>&state=<?location.address.state?>&zipcode=<?location.address.zip?>">Mapquest</a>.
</p>
The point is that the address components (zip, citey, state, etc.) are
properties of an Address object, which is a property of the Location
object known to the page.
What would be the Tapestry way of building this? I see the ExternalLink
class, and am wondering if that's what I need, and if that's the case,
do I need to build separate supporting classes for each of those
different URL styles? Should I be using some other Tapestry object? Or
is there a more direct way to embed this data in the page? Everything I
see allows me to embed data in HTML elements, but I dont' see how I
might extend this to embedding data in attributes.
So... any suggestions? Pointers to the right portions of the fine
manual? Or to a working example which does this?
Thanks for any help you can offer,
-- Scott Sauyet
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