When Tapestry renders a page containing a form, it does a lot of behind-the-scenes work to negotiate between the form and the components wrapped by the form (directly, or indirectly). Its busy counting the number of form elements, assigning unique names (even when loops occur) and a bunch of other stuff. It's a much more complex relationship than you can get with a JSP and it would be close to impossible to reproduce it as a JSP tag (there has been a recent discussion about trying to create JSP tags that could emulate Tapestry components but I still think of it as a square peg/round hole situation).
If you can partition your application into all-JSP or all-Tapestry, it won't be that bad. However, if you want to have a JSP contain a form that submits, somehow, into the world of Tapestry, you'll have to write the code that pulls query parameters out of the request ... in other words, the same kind of work you'd have to do if you weren't using Tapestry at all. There is no magic, Tapestry can't magically know how query parameters map to what properties or what translations have to occur. You could then, say, have a very similar looking form implemented as a Tapestry page and stay inside Tapestry from that point on. ----- Original Message ----- From: "natesh babu" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: "Tapestry Developer" <[EMAIL PROTECTED]> Sent: Monday, August 19, 2002 8:37 AM Subject: Re: [Tapestry-developer] Tapestry - Interoperability with JSP Pages > > I want to use only my Formula-One race car but I > cannot insist others to use the same. > > I don't want to lose all the automatic > processing of form fields, as well as the validation > framework and all that. > > Our application will have 100+ forms and other pages. > If I have to write two sets of pages one for Tapestry > and the other for normal JSP application, then it is > lot of work for us which is reversing the use of > Tapestry. > > Is there any other way like using a JSP tag which will > refer this form component ? > > Thanks, > Natesh > > > --- [EMAIL PROTECTED] wrote: > > You simply can't just rip out portions of a Tapestry > > > > page as a JSP. It's kind of like saying, "How do I > > pull > > the transmission out of my Formula-One race car and > > plug > > it into my lawn mower". > > > > If you have to have forms inside JSPs, you can build > > > > them in the normal way and have them submit into > > Tapestry. A Tapestry page can gain access to query > > parameters of the request and process them like a > > servlet can. What you lose here is all the > > automatic > > processing of form fields, as well as the validation > > > > framework and all that. > > > > You'll have to build a bridge between JSP and > > Tapestry; > > this will take the form of a new engine service. > > Take a > > look at the external service in the Vlib as an > > example. > > > > So, what you'd end up with is a JSP page that, when > > submitted, triggers behavior inside a Tapestry page. > > > > The flow of control would look like: > > > > Form submits to Tapestry URL > > Custom service activated, gets page name from > > service > > context > > Locates page instance, casts to particular > > interface, > > invokes method > > Method provided by page gets request parameters > > supplied > > by HTML form, does stuff with them > > Page either renders response, selects another > > Tapestry > > page to render response, or forwards to a JSP to > > render > > a response > > > > > > -- > > [EMAIL PROTECTED] > > > > http://tapestry.sf.net > > > Hi all, > > > > > > We are looking at Tapestry to re-write an existing > > JSP > > > based intranet portal. So far, it looks promising. > > We > > > want to really exploit Tapestry's powerful > > features > > > like component creation, html templates, writing > > > interesting java code, localization, debugging > > etc. > > > > > > But I have the following critical issue. We have > > other > > > JSP based sites which may refer some or most of > > the > > > parts of our portal. For example, another portal > > may > > > embed a form existing in our portal. If I re-write > > the > > > application using Tapestry, how do I just re-use > > the > > > form component in the other jsp based portal ? I > > don't > > > want to simply re-direct, but, want to re-use or > > embed > > > the form component in the jsp page. > > > > > > Has anybody faced similar kind of issue ? Any > > > suggestions or solutions are highly appreciated. > > > > > > Regards, > > > Natesh > > > > > > > > > __________________________________________________ > > > Do You Yahoo!? > > > HotJobs - Search Thousands of New Jobs > > > http://www.hotjobs.com > > > > > > > > > > > > ------------------------------------------------------- > > > This sf.net email is sponsored by: OSDN - Tired of > > that same old > > > cell phone? Get a new here for FREE! > > > > > > https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 > > > _______________________________________________ > > > Tapestry-developer mailing list > > > [EMAIL PROTECTED] > > > > > > https://lists.sourceforge.net/lists/listinfo/tapestry-developer > > > > > > > ------------------------------------------------------- > > This sf.net email is sponsored by: OSDN - Tired of > > that same old > > cell phone? Get a new here for FREE! > > > https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 > > _______________________________________________ > > Tapestry-developer mailing list > > [EMAIL PROTECTED] > > > https://lists.sourceforge.net/lists/listinfo/tapestry-developer > > > __________________________________________________ > Do You Yahoo!? > HotJobs - Search Thousands of New Jobs > http://www.hotjobs.com ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ Tapestry-developer mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/tapestry-developer
