The following comment has been added to this issue:
Author: peter royal
Created: Wed, 3 Sep 2003 8:25 PM
Body:
A variable being null in a lower context should probably mask out the higher-level
variable.
This could potentially break client code that relies on that behavior though. Comments
from anyone else before I make this change?
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View the issue:
http://jira.codehaus.org/secure/ViewIssue.jspa?key=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: Unassigned
Priority: Minor
Time Spent: Unknown
Remaining: Unknown
Project: jelly
Assignee:
Reporter: Scott Howlett
Created: Tue, 26 Aug 2003 2:08 PM
Updated: Tue, 26 Aug 2003 2:08 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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