[jboss-jira] [JBoss JIRA] Created: (JBRULES-2819) DSL parsing/expansion: '\', '$', empty value, empty condition

[Wolfgang Laun (JIRA)]

DSL parsing/expansion: '\', '$', empty value, empty condition  
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                 Key: JBRULES-2819
                 URL: https://jira.jboss.org/browse/JBRULES-2819
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: drools-compiler-DSL
    Affects Versions: 5.1.1.FINAL
            Reporter: Wolfgang Laun
            Assignee: Mark Proctor
             Fix For: 5.2.0.M1


DSL parser does not accept an empty "value" section, e.g.
   [when] a man loves a woman=

Expansion of a rule with an empty condition results in "whenthen".

The DSL parser escapes '$', but not '\' in value sections. It should not modify the value section except for "normalizing" variable references. Variable references should be restricted to a "clean" character sequence (e.g. Java identifier). The current expansion using replaceAll is too fragile.

I have emailed three reworked source files AntlrDSLMappingEntry.java  DefaultExpander.java  DSLTokenizedMappingFile.java to Edson, but I didn't change the parser itself.





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