[rules-users] ClassCastException using WorkingMemoryFileLogger (3.0.6)

[Mark Proctor]

drools 3.0 or 4.0? I'm guessing 3.0, this is a known error in 3.0 and is 
fixed in 4.0 - we won't be backporting the fix.

Mark
Yuri de Wit wrote:
> I got a ClassCastException once I ran my app with the
> WorkingMemoryFileLogger attached to it. After a bit of debugging the
> CCE is being thrown because for an unknown reason the column of a
> Declaration is wrong: it should have been 0 like all the other
> declarations on the same Fact, but it is 0 instead. It seems that
> column is wrongly set when building the rule package, even before
> evaluating.
>
> What I dont understand is why this is happening and why I dont see the
> problem when I remove the WorkingMemoryFileLogger from the picture.
>
> The rules goes a bit like this:
>
> rule
>     when
>           Fact1(var1: a, var2: b, var3: c)
>
>           c : (
>              Setting( x==1, y==2, z==3)
>            or
>               Setting( x==1, y==2, z==ANY)
>            or
>               Setting( x==1, y==ANY, z==ANY)
>            or
>               Setting( x==ANY, y==ANY, z==ANY)
>           )
>
>           not Fact2( a == var1, b== var2, c==var3)
>     then
>           ...
> end
>
> The declarations for a and b, for instance are referring to the right
> column, but c doesnt.
>
> BTW: Does any one know of a better pattern for implementing cascading
> settings? The biggest problem I am facing is that I need to replicate
> the long list or OR Settings for each rule that needs to check for
> them (the actual settings depend on fact properties).
>
> Here is the exception:
>
> org.drools.spi.ConsequenceException: java.lang.ClassCastException: 
> com....
>        at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:441)
>        at 
> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:407)
>        at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:268) 
>
>        at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:255) 
>
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