[JBoss JIRA] (DROOLS-903) Drools map usage nullpointer exception

Friday, 4 September 2015

     [
https://issues.jboss.org/browse/DROOLS-903?page=com.atlassian.jira.plugin...
]

Mario Fusco resolved DROOLS-903.
--------------------------------
    Resolution: Out of Date

Provided that the rulesParamMap always has a not null value for key "01"
(otherwise the problem is in your data or you should add the constraint
getRulesParamMap().get("01") != null to your rule) I think that your problem
could be caused by the fact that you're using the 'rules' declaration also
inside the pattern that could be rewritten as it follows

{{Rules(getRulesParamMap().get("01").getActual()>=getRulesParamMap().get("01").getThreshold())}}

While using the declaration inside its own pattern is not technical wrong, it is
considered bad style and can cause some problem on 5.x that anyway have been already
solved on 6.x.

...
 Drools map usage nullpointer exception
 --------------------------------------

                 Key: DROOLS-903
                 URL: https://issues.jboss.org/browse/DROOLS-903
             Project: Drools
          Issue Type: Bug
          Components: core engine
    Affects Versions: 5.6.0.Final
            Reporter: Abrham Kampur
            Assignee: Mario Fusco

 My rules file looks like
 rule"rule1 test"
 when   
rules:Rules(rules.getRulesParamMap().get("01").getActual()>=rules.getRulesParamMap().get("01").getThreshold())
 then
           RuleResult ruleResult=new RuleResult()
           ruleResult.setRulePassed(false);
        rules.getRulesResultMap().put("01",ruleResult);
  System.out.println("Rule failed. ");
   retract(rules)
 end
 Note: Rules is a clas which has rulesParamMap and ruleResultMap attributes.
          Ruleresult is also a class with fields actual and threshold 

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