[rules-users] unable to resolve method using strict-mode

[Vladimir Perlov]

Hi Wolfgang,
Please take a look at attached new example.
This time the example can demonstrate when strict mode is false we don't have to put class cast.
Beside I finally figured out how to switch strict mode for MVEL dialect.

Best regards,
Vladimir

Date: Sat, 3 Oct 2009 14:36:10 +0200
From: wolfgang.laun at gmail.com
To: rules-users at lists.jboss.org
Subject: Re: [rules-users] unable to resolve method using strict-mode

The Java code in the archive just compiles a .drl file, and there's no reason this should fail. The class cast would only appear to be missing after a Map object is inserted into WM, and the session is run so that the rule fires.

-W

2009/10/2 Vladimir Perlov <vladperl at hotmail.com>






It's compiled and working on Windows without any casting :)
Check out the test project I attached. 
You will see that the rule  will compile  from web application (Windows only) or with Java SE application. The  web application using JSF so in case to run it use application server with included JSF library.


http://download.java.net/glassfish/v3/promoted/


Date: Fri, 2 Oct 2009 19:48:17 +0200
From: wolfgang.laun at gmail.com

To: rules-users at lists.jboss.org
Subject: Re: [rules-users] unable to resolve method using strict-mode

Map() in the .drl file is bound to be interpreted as Map<Object,Object> so that a Map.get() returns an Object. To be able to call method getSomeMethod() you'd have to cast this result, according to


 ((SomeClass)$map.get("x")).getSomeMethod()


I fail to understand how this could ever be avoided - strict or no strict, MVEL or not MVEL.

-W 

2009/10/2 Vladimir Perlov <vladperl at hotmail.com>







Hi Wolfgang,
Thank you very much for quick response!

I tried your suggestion and still getting the following error:

Unable to build expression for 'consequence': Failed to compile: 1
compilation error(s): - (1,29) unable to resolve method using
strict-mode: java.lang.Object.getSomeMethod() '
System.out.println($map.get("x").getSomeMethod());
' : [Rule name='TEST']
At least now I have only 1 compilation error comparing to the previous variant.

modified rule:

rule "TEST"


    dialect "mvel"
    when
            $map : Map()


    then
            System.out.println($map.get("x").getSomeMethod());
end



I believe that problem is related to strict-mode that somehow enforced on Linux but not on Windows.
I tried to remove the strict mode using the the following approach but it seems don't have any effect.
We have web application with many drools rules and it's working on Windows but when we deployed the same application to   Linux we are getting failed compile errors ;) 



KnowledgeBuilderConfiguration config = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();     
config.setProperty("drools.dialect.mvel.strict", "false");


kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(config);

Please advise me.

By the way I'm using drools 5.0.1


Date: Fri, 2 Oct 2009 18:30:25 +0200


From: wolfgang.laun at gmail.com
To: rules-users at lists.jboss.org
Subject: Re: [rules-users] unable to resolve method using strict-mode



2009/10/2 Vladimir Perlov <vladperl at hotmail.com>








Here is the rule that failed to compile on Linux:

rule "TEST"
    dialect "mvel"
    Send
    when
            map : Map()

$map : Map()

or omit '$' in the consequence.
-W
 
    then
            System.out.println($map.get("x").getSomeMethod());
end


 		 	   		  
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