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  1. Red Hat Decision Manager
  2. RHDM-1528

Compound assignment operation like BigDecimal_type_property += BigDecimal_value causes a compilation error in executable model.

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major Major
    • 7.10.0.GA
    • 7.9.0.GA
    • BRE

    • The issue was found in RHDM 7.9.0.

    • False
    • False
    • Release Notes
    • CR1
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      $ unzip reproducer_02801729_6c_6d.zip 
$ cd reproducer_02801729_6c_6d
$ mvn clean compile exec:exec -DgenerateModel=YES
    :
    :
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile-1) @ reproducer_02801729_6c_6d ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 6 source files to /work2/cases/02801729/reproducer_02801729_6c_6d/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /work2/cases/02801729/reproducer_02801729_6c_6d/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/PF9/LambdaConsequenceF9B783ABDBE8B65F49FDA13227908E7F.java:[19,56] void cannot be dereferenced
[INFO] 1 error
[INFO] -------------------------------------------------------------
    :
    :
      Show
      $ unzip reproducer_02801729_6c_6d.zip $ cd reproducer_02801729_6c_6d $ mvn clean compile exec:exec -DgenerateModel=YES : : [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile-1) @ reproducer_02801729_6c_6d --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 6 source files to /work2/cases/02801729/reproducer_02801729_6c_6d/target/classes [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] /work2/cases/02801729/reproducer_02801729_6c_6d/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/PF9/LambdaConsequenceF9B783ABDBE8B65F49FDA13227908E7F.java:[19,56] void cannot be dereferenced [INFO] 1 error [INFO] ------------------------------------------------------------- : :
    • 2020 Week 49-51 (from Nov 30)

      Compiling a rule like (*1) which is described in MVEL dialect and uses a compound assignment operation like BigDecimal_type_property += BigDecimal_value, for example,

      • $bus.weight += $bus.weight; ..... (6c) or
      • BigDecimal bd1 = 1000; $bus.weight += bd1; ..... (6d)

      with executable rule models enabled, an error like (*2) occurs. $bus.weight is a BigDecimal type property.

      The same issue also occurs in the case of using '-='.
      For '*=' and '/=', no compilation error occurs but the value of $bus.weight does not change by the operation.

      (*1)

      package com.example.reproducer

import com.example.reproducer.Bus

dialect "mvel"

rule "bus6c"
    when
        $bus : Bus()
    then
        $bus.weight += $bus.weight;    ..... (6c)
        System.out.println("***** " + $bus + ", weight = " + $bus.weight);
        update($bus);
end

      (*2)

      [ERROR] /work2/cases/02801729/reproducer_02801729_6c_6d/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/PF9/LambdaConsequenceF9B783ABDBE8B65F49FDA13227908E7F.java:[19,56] void cannot be dereferenced

        1. reproducer_02801729_6c_6d.zip
          8 kB

              lmolteni@redhat.com Luca Molteni
              rhn-support-myoshida Masato Yoshida
              Daniel Rosa Daniel Rosa
              Daniel Rosa Daniel Rosa
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                Created:
                Updated:
                Resolved: