Re: [OS-webwork] Newbie - CDList.jsp

Hani Suleiman Tue, 18 Nov 2003 19:59:16 -0800

Magically! Webwork automatically does all that for you, as long as a getAlbum method exists in that item in the collection, it'll work. Your jsp pages don't need to know anything about types or classes. The webwork tags are all valuestack-aware, as in they will know how to resolve expressions and do the appropriate java magic to get it working.

PS I'd strongly recommend figuring out how webwork works WITHOUT looking at the source first, and just using the docs.

On Nov 18, 2003, at 9:25 PM, Rajagopal. V wrote:

Hani
Thanks for the reply. I did take a look at CDList
class and the one thing thats puzzling me is that in
the doStartTag and doAfterBody of IteratorTag, all its
doing is a iterator.next() which should return a
Object. My problem is how does that automatically get
cast down to a CD Class.
I come from a Struts background and in that case, the
logic:iterate has a type attribute which specifies
what is the type of the individual elements in a
Collection.  I couldnt find a similar match in
Webwork.

Thanks
Raj

--- Hani Suleiman <[EMAIL PROTECTED]> wrote:

have a look at the webwork.examples.i18n.CDList
class. That is the
action class, so when the page makes a call to
CDList, that
automatically calls the getCDList method in that
action class. The
CDList is now iterated through and within the
iterate block, the top of
the value stack now has the current CD at the top,
so when the
propertytag tries to display 'album', the method
called will be
getAlbum() on the particular CD that the iterator
now points at.

On Nov 18, 2003, at 8:25 PM, Rajagopal. V wrote:

Hello
I just started looking at Webwork and checking out

the

examples. One thing i noticed in cdlist.jsp is

this

code
   <webwork:iterator value="CDList">
   <option value="<webwork:property

value="album"/>">

      <webwork:property value="album"/>,
      <webwork:property value="artist"/>,
<webwork:property value="country"/>,
      <webwork:text name="'price'"
value0="@pricer/computePrice(price)"/>
   </option>
   </webwork:iterator>

CDList is actually a List of "CD" objects, but i
couldnt find anywhere in the code where this cast

is

made back. So how does webwork know which object

to

call when the getAlbum() is called?

TIA
Raj

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Re: [OS-webwork] Newbie - CDList.jsp

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