Re: Newbie: Session variable problem

Hi, Paul,

The method signature for setCurrentBatchIndex() is:

     public void setCurrentBatchIndex(int batchIndex)

Notice that the method parameter is declared as an int.

The method signature for your dBatch method is:

      public Integer dBatch()

In other words, it returns and Integer object rather than an int  
primitive. So Java looks for a setCurrentBatchIndex() method  
signature that takes an Integer object as its parameter and finds  
none, therefore...   "can't resolve symbol"!

To avoid the problem, change your faulty line of code to:

      nextPage.donationDisplayGroup.setCurrentBatchIndex(sess.dBatch 
().intValue());

You might have been helped in finding this solution by looking in  
Xcode's build results window. When you see a message in Xcode's  
status bar at the very bottom of the Xcode window indicating build  
errors, you can click on that message and Xcode will display the  
build results window.

To understand all the information contained therein, take a look at  
this page:

http://developer.apple.com/documentation/DeveloperTools/Conceptual/ 
XcodeUserGuide/Contents/Resources/en.lproj/05_07_bs_building_product/ 
chapter_34_section_4.html

In particular, note that if the Build log pane is open and you click  
on a line in the Build results pane of the Build Results window, the  
Build log pane will scroll directly to the lines in the build log  
indicating details about the error. In your case, it would have shown  
you which variable was unresolved, indicating that it was having  
trouble with "setCurrentBatchIndex()".

Knowing this, the first thing I would think of is method signature.  
Well, actually, the first thing I would think of is whether I have  
the appropriate imports, which tends to be a more common error on my  
part, but method signature rates right up there among the the early  
thoughts that hit my head while resolving such compilation errors.

Regards,
Jerry

On Oct 28, 2006, at 10:29 AM, PaulM wrote:

>
> Could someone please help me solve this session variable problem.
> If I use this line of code everything works as desired.
> "nextPage.donationDisplayGroup.setCurrentBatchIndex(3);"
>
> When I try the same line replacing the "3" with "sess.dBatch()" it  
> doesn't
> work. Gives error "can't resolve symbol"
>
> What is the correct way to right these two lines...?
>
> Session sess = (Session)session();
> nextPage.donationDisplayGroup.setCurrentBatchIndex(sess.dBatch());
>
> A more complete code sample is shown below.
>
> Thank You.
>
> ------- In Session.java  ---------------
>
> public class Session extends WOSession {
>
> < bunch of code snipped out>
>
> public Integer dBatch ;
> public Integer dBatch() {return  dBatch; }
> public void setDBatch(Integer newDBatch) { dBatch = newDBatch; }
>
> }
>
>
>
> -----Code from a separate web component trying to read variable  
> "dBatch"
> from session----
>
>  public SearchDonations doList()
>     {
>         SearchDonations nextPage =
> (SearchDonations)pageWithName("SearchDonations");
> 		
> 		nextPage.donationDisplayGroup.qualifyDataSource();
> 		
> 		
> 		/* this next line works ---
> 		nextPage.donationDisplayGroup.setCurrentBatchIndex( 3 );
> 		the correct batch of the displaygroup is shown on the next page
> 		*/
>
> 		Session sess = (Session)session();
> 		// this line does not work --
> 		// The code won't compile. Gives error can't resolve symbol
> 		nextPage.donationDisplayGroup.setCurrentBatchIndex(sess.dBatch());
>         return nextPage;
>     }
>
> -------------------------------------------
> -- 
> View this message in context: http://www.nabble.com/Newbie%3A- 
> Session-variable-problem-tf2529717.html#a7050072
> Sent from the WebObjects-Dev mailing list archive at Nabble.com.
>
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--
__ Jerry W. Walker,
    WebObjects Developer/Instructor for High Performance Industrial  
Strength Internet Enabled Systems

     [email protected]
     203 278-4085        office