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From SGu...@osc.state.ny.us
Subject [scxml] JEXL Evaluator's evalCond issue
Date Thu, 14 Jun 2012 21:23:26 GMT
1. Problem renaming method in class used for condition evaluation. 

Class: Test 
method: boolean method1(integer i) 

xml snippet: 

<state id="DELETE_STATE"> 
            <transition event="delete" target="STATUS_UNKNOWN" 
cond="test.method1(100)"/> 
</state> 


We are trying rename test.method1(integer i) in Test class to 
test.methodRenamed(integer i) 

and update xml to: 

<state id="DELETE_STATE"> 
            <transition event="delete" target="STATUS_UNKNOWN" 
cond="test.methodRenamed(100)"/> 
</state> 

Executing SCXML after the above change, test.methodRenamed(100) is not 
invoked and no information in logs are seen nor any exception seen in the 
trace. 

Note: Putting back to the old method name (test.method1(100)) works as 
expected. 


2. Problem adding a new method (test.methodNew(200)). 

Class: Test 
methods: boolean method1(Integer i) 
                  boolean methodNew(Integer i) 

<transition event="delete" target="STATUS_UNKNOWN" cond="test.method1(100) 
&amp;&amp; test.methodNew(200)"/> 


Executing SCXML: 

1. test.method1(100) was invoked and returned true. 

2. test.methodNew(200) was never invoked 

3. JexlEvaluator's method "evalCond" line 
exp.evaluate(getEffectiveContext(jexlCtx)) returns false. 

Note: Adding a non existent method or junk string to the xml's cond 
attribute doesn't yield any failure information and JexlEvaluator simply 
returns false . 

Versions used: commons-scxml-0.9.jar, commons-jexl.1.1.jar 

The issue seems to be a JEXL issue, however upgrading to the latest JEXL 2 
version is not feasible due to compilation issues. 

Is there/will there be a version of SCXML that is compatible with a later 
version of JEXCL? (ie: JEXL2) 


Thanks & Regards
Satish Gutta



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