[rules-users] Mvel autoboxing math

[Mark Proctor]

Mark Proctor wrote:
> Joe White wrote:
>>
>> The drl test case below illustrates a problem with math inside of 
>> drools when using the mvel dialect. When using autoboxing the order 
>> of operations (and parens)  are not respected. This is using drools 
>> 5.0M1 and mvel-2.0-dp4.jar. The correct answer is 80 and the answer 
>> provided with autoboxing in the mvel dialect is 100.
>>
>>  
>>
>> I'm uncertain of how to create a viable test case in pure mvel to add 
>> it to their jira. Any help is appreciated,
>>
> Drop in the newer MVEL, I believe this is fixed - if it's not open a 
> JIRA over at MVEL.
> http://mvel.codehaus.org/
Sorry correction, it's fixed in MVEL trunk, the author will do a binary 
release soon.
>>
>>  
>>
>> Thanks,
>>
>>  
>>
>> Joe
>>
>>  
>>
>>  
>>
>> *package* test;
>>
>>  
>>
>> *dialect* "mvel"
>>
>>  
>>
>> *rule* "TestRule"
>>
>>       *when*
>>
>>       *then*
>>
>>            
>>
>>             *double* value=(2**new* Double("50"))-10-10;
>>
>>             System.out.println(value);
>>
>>            
>>
>>             *double* valueTwo=(2*50)-10-10;
>>
>>             System.out.println(valueTwo);
>>
>> *End*
>>
>> * *
>>
>> *RESULTS*
>>
>> Wrong = 100.0
>>
>> Right = 80.0
>>
>> ------------------------------------------------------------------------
>>
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>

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