[jboss-jira] [JBoss JIRA] (JBRULES-2432) TemplateDataListener.newCell filters out correctly blank values; this leads to incorrect template processing

[Geoffrey De Smet (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-2432?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey De Smet updated JBRULES-2432:
--------------------------------------

    Fix Version/s: 5.4.0.Beta3
                       (was: 5.4.0.Beta2)

    
> TemplateDataListener.newCell filters out correctly blank values; this leads to incorrect template processing
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-2432
>                 URL: https://issues.jboss.org/browse/JBRULES-2432
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core  (expert)
>    Affects Versions: 5.0.1.FINAL
>         Environment: Any
>            Reporter: Denis Robert
>            Assignee: Michael Anstis
>             Fix For: 5.4.0.Beta3
>
>
> When using a DataProviderCompiler(), a blank column returned by the DataProvider causes an entire line to not be outputted in the result. I tracked this to a line in TemplateDataListener.newCell which explicitly filters out blank cells, even though such cells should be allowed.
> The template I'm using is:
> <snip>
> template header
> ruleID
> object
> field
> regexp
> replacement
> package standardization
> import [removed].*
> template std_rule
> rule "@{ruleID}"
> dialect "mvel"
> when
> 	$o: @{object}()
> then						
> 	$o.@{field} = $o.?@{field}.replaceFirst("@{regexp}", "@{replacement}");		
> end
> end template
> <snip>
> Whenever "replacement" is blank, the consequent does not get generated.

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