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Re: How can i access a JSP function in XSL?



Hi Peter,

Thanks for the help.
I had a better solution.

My XML is also generated using a JSP.
i.e JSP outputs an XML
and
another JSP ouputs an  XSL

But the way i paint my
elements / attribute/values for the XML
in the JSP are purely Java.
So i put in the function there itself in the **XML-JSP**,
so i process the data , before generating the XML-JSP itself
and give it to the XSL to display.

i display an HTML finally.
But i think the cocoon site's really good,
And of course these suggesstion's will be of great help later on.

Cheers,
Suman











                                                                                                         
                    Peter Davis                                                                          
                    <pdavis152@attbi.com>             To:     xsl-list@lists.mulberrytech.com            
                    Sent by:                          cc:                                                
                    owner-xsl-list@lists.mulber       Subject:     Re: [xsl] How can i access a JSP      
                    rytech.com                         function in XSL?                                  
                                                                                                         
                                                                                                         
                    05/01/02 03:57 PM                                                                    
                    Please respond to xsl-list                                                           
                                                                                                         
                                                                                                         




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On Wednesday 01 May 2002 02:18, Suman.Sathyanarayan@itsindia.com wrote:
> <% getTelephoneNumber(" %>
> <xsl:value-of select="value"></xsl:value-of>
> <%   ");  %>

When the JSP is executed and when the XSLT is executed are *totally*
different.  You can't use a value returned from the XSLT while the JSP is
running, because the JSP *outputs* the XSLT -- which means the XSLT is
executed after the JSP.

What you have here will essentially be the same as:

<% getTelephoneNumber("\n <xsl:value-of select=\"value\"/> \n"); %>

which is probably not what you want.  You will have to do one of three
things:

* If you are making an HTML page, then you will have to do something like
this
in your XSLT:

<input type="hidden" name="phone" value="{value}"/>

which uses an Attribute Value Template that will output the phone number
into
the <input value="..."/>.  You then have to put that into a <form> and make

the user click "submit" to return the value to the server where you can do
more processing -- pretty ugly.

* Check out the Cocoon project (http://xml.apache.org/cocoon), and convert
all
of your .jsp files to .xsp.  This is a totally new language, so converting
won't be easy, but it *might* be able to do what you want (emphasis on
*might*, since you still won't be able to use XSLT directly in the page)

* Use your processor's extension mechanism to be able to access
getPhoneNumber() in the XSLT, so you can do something like:

<xsl:value-of select="xx:getPhoneNumber(value)"/>

This is probably the best way to go, but it depends on a lot of other
factors
such as the processor, where getPhoneNumber is defined, and whether
getPhoneNumber relies on non-static state that is innaccessible from where
it
is called by the extension.

- --
Peter Davis
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