[jira] Assigned: (JELLY-78) Null variables are passed over by scope inheritance

[co...@jakarta.apache.org]

Message:

   The following issue has been re-assigned.

   Assignee: dion gillard (mailto:dion@apache.org)
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View the issue:
  http://issues.apache.org/jira/browse/JELLY-78

Here is an overview of the issue:
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        Key: JELLY-78
    Summary: Null variables are passed over by scope inheritance
       Type: Bug

     Status: Open
   Priority: Minor

    Project: jelly
 Components: 
             core / taglib.core
   Fix Fors:
             1.0-beta-4

   Assignee: dion gillard
   Reporter: Scott Howlett

    Created: Tue, 26 Aug 2003 2:08 PM
    Updated: Thu, 26 Aug 2004 9:45 PM

Description:
If I explicitly assign variable foo a null value in the current scope but it has a value in some parent scope, findVariable() will bypass the null value in favor of the non-null value up the chain.

This is because JellyContext.getVariable & findVariable just test the result of variables.get(name) against null instead of also checking with containsKey like this:

       Object value = variables.get(name);
       if ( value == null
         && !variables.containsKey(name)
         && isInherit() ) {

....


Perhaps this is an explicit design decision, but I thought it was worth mentioning.



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