Re: request & response objects

[Geoff Howard]

Christopher Painter-Wakefield wrote:


This documentation is a bit out of date, I think, although it is a minor
sin in this case.  Cocoon has its own Request and Response interfaces
(looking at the implementors this is perhaps because they also handle the
command line interactions, not just the servlet interfactions).  Look at
the API docs (http://cocoon.apache.org/2.1/apidocs/index.html) for more
info.  As it happens, the APIs for these interfaces are the same as
HttpServletRequest and HttpServletResponse, so except when you need to
declare the type (as in your example), you can use these objects in the
same fashion.
Even the API docs are out of date - the comment for HttpResponse still says
it implements HttpServletResponse :)
You can declare your constructor to use
org.apache.cocoon.environment.Request and ....Response.
-Christopher



                                                                                                                                      
                      Gianluca Sartori                                                                                                
                      <[EMAIL PROTECTED]        To:       [EMAIL PROTECTED]                                                      
                      rg>                      cc:                                                                                    
                                               Subject:  request & response objects                                                   
                      10/20/2003 09:35                                                                                                
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Hi,

             I'm slowly getting into coccon. I read I can use "request" and
"response" objects in XSP pages from my Java code. The official
documentation says these objects are instances of
HTTPServletRequest/Response, but is it really true?
I'm instantiating an object whose constructor accepts two arguments as
follow:
public TheClass (HttpServletRequest request, HttpServletResponse
response)
When I try to instantiate an object out of this class cocoon ends up
with an error complaining about an undefined constructor. Here is how I
instantiated the object:
<?xml version="1.0" encoding="UTF-8"?>
<xsp:page xmlns:xsp="http://apache.org/xsp";>
<xsp:structure>
<xsp:include>org.mysite.*</xsp:include>
</xsp:structure>
<my-root-element>
<xsp:expr>new TheClass(request, response)</xsp:expr>
[...]
This gets translated into the following code:

[...]
XSPObjectHelper.xspExpr(contentHandler, new WASClient(request,
response));
[...]
And the error returned by cocoon is:

org.apache.cocoon.components.language.LanguageException: Error compiling
test_xsp: ERROR 1
(org/apache/cocoon/www/projects/was/docs/test_xsp.java): ...
this.characters("\n\n"); // start error (lines 104-104) "The constructor
WASClient(Request, Response) is undefined"
XSPObjectHelper.xspExpr(contentHandler, new WASClient(request,
response)); // end error this.characters("\n\n"); ... Line 104, column
0: The constructor WASClient(Request, Response) is undefined
A comment into the generated code makes me think about the correctness
of the documentation, here it is:
        /* Built-in parameters available for use */
        // context    - org.apache.cocoon.environment.Context
        // request    - org.apache.cocoon.environment.Request
        // response   - org.apache.cocoon.environment.Response
So, what should I do to make my Object working? I'm using
HTTPServletRequest/Response ad, to say the thruth, I'm not so happy
changing them to be used in coccon. Anyway, if you tell me this is the
only way to go...
I seem to think there was some discussion about allowing the real 
HTTPServletRequest (held as a private member in the http impl of the 
abstract o.a.c.environment.Request) to be accessible.  You may want to 
check the dev list archives for references to this.  I don't think it 
was implemented but you could check that too.

Geoff

Geoff

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