[rules-users] strict-mode and nested object property access in drools 5.4.0.Final - can i cast?

[radai rosenblatt]

hello.

I have the following 2 classes:

public class ClassWithPayload {
    private String key;
    private Object payload;
    // getters setters etc ommitted
}

public class PayloadClass {
    public String someProp;
    //getters setters etc ommitted
}

and im trying to get the following rule to compile:

rule "Naive Payload Access"
when
   $container : ClassWithPayload(key == "someKey", (payload != null &&
payload.someProp == "someValue"))
then
   System.err.println("boom");
end

which results in the following error:
java.lang.AssertionError: Unable to Analyse Expression payload.someProp:
[Error: unable to resolve method using strict-mode:
java.lang.Object.someProp()]
[Near : {... payload.someProp ....}]

is there some way for me to cast payload.someProp to the proper class ?
(PayloadClass in this case).
this is a simplification of a bigger migration issue from drools 5.1 to 5.4
so the payload property has to remain an Object in the general case.

there's a casting syntax mentioned here
(https://community.jboss.org/wiki/DroolsPatternLanguage) but i take it its
not been implemented yet? (or maybe i just cant understand it properly?)
i've tried this:

rule "Naive Payload Access"
when
   $container : ClassWithPayload(key == "someKey", (payload != null &&
payload.#PayloadClass(someProp == "someValue")))
then
   System.err.println("boom");
end

but it doesnt compile:
java.lang.AssertionError: [8,51]: [ERR 101] Line 8:51 no viable alternative
at input '(' in rule "Naive Payload Access"
[0,0]: Parser returned a null Package

and if i cant cast, how can i get this sort of rule to behave as it did in
5.1.1 ?

thanks in advance for any assistance,
  
    Radai.


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