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  1. Drools
  2. DROOLS-5542

org.apache.maven.plugins:maven-compiler-plugin fails on the generated model

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Details

    • Bug
    • Resolution: Done
    • Major
    • None
    • 7.40.0.Final
    • executable model
    • None
    • 2020 Week 31-33 (from Jul 27)
    • Hide

      Create a rule calling in the LHS a function with more than 2 parameters and pass variables to that function, not constants.

      In the bugs description there is an example.

      Show
      Create a rule calling in the LHS a function with more than 2 parameters and pass variables to that function, not constants. In the bugs description there is an example.
    • NEW
    • NEW

    Description

      Given a rule as such (modified from the standard example):

       

      global org.example.drools.service.DummyService dummyService;

rule "will execute per each Measurement having ID color"
no-loop
when
 Measurement( id == "color", $colorVal : val )
 $var1: String() from dummyService.dummy("a");
 $var2: String() from dummyService.dummy("b");
 $var3: String() from dummyService.dummy("c");
 String() from dummyService.dummy($var1, $var2, $var3)
then
 controlSet.add($colorVal);
end

      The org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile fails with:

      no suitable method found for from(org.drools.model.Global<org.example.drools.service.DummyService>,org.drools.model.Variable<java.lang.String>,org.drools.model.Variable<java.lang.String>,org.drools.model.Variable<java.lang.String>,rules.PFD.LambdaExtractorFD1FA74D5FA8CFA329D97E34A42287FA)
[ERROR] method org.drools.model.DSL.<T>from(T) is not applicable
[ERROR] (cannot infer type-variable(s) T
[ERROR] (actual and formal argument lists differ in length))
[ERROR] method org.drools.model.DSL.<T>from(org.drools.model.Variable<T>) is not applicable
[ERROR] (cannot infer type-variable(s) T
[ERROR] (actual and formal argument lists differ in length))
[ERROR] method org.drools.model.DSL.<T>from(org.drools.model.functions.Function0<T>) is not applicable
[ERROR] (cannot infer type-variable(s) T
[ERROR] (actual and formal argument lists differ in length))
[ERROR] method org.drools.model.DSL.<T>from(org.drools.model.Variable<T>,org.drools.model.functions.Function1<T,?>) is not applicable
[ERROR] (cannot infer type-variable(s) T
[ERROR] (actual and formal argument lists differ in length))
[ERROR] method org.drools.model.DSL.<A,B>from(org.drools.model.Variable<A>,org.drools.model.Variable<B>,org.drools.model.functions.Function2<A,B,?>) is not applicable
[ERROR] (cannot infer type-variable(s) A,B
[ERROR] (actual and formal argument lists differ in length))
[ERROR] method org.drools.model.DSL.<A,B,C>from(org.drools.model.Variable<A>,org.drools.model.Variable<B>,org.drools.model.Variable<C>,org.drools.model.functions.Function3<A,B,C,?>) is not applicable
[ERROR] (cannot infer type-variable(s) A,B,C
[ERROR] (actual and formal argument lists differ in length))

       

      So the DSL.from() cannot accept more than 2 variables.

       

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          is related to

          Bug - A problem that impairs or prevents the functions of the product. DROOLS-5548 Model compiler cannot generate declaration from a function call

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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              lmolteni@redhat.com Luca Molteni
              cchiru Ciprian Chiru (Inactive)
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                Created:
                Updated:
                Resolved: