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  1. Red Hat Decision Manager
  2. RHDM-1549

The use of AND in source pattern of accumulate causes compilation error in executable model.

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Details

    • Bug
    • Resolution: Done
    • Major
    • 7.10.1.GA
    • 7.1.0.GA, 7.9.0.GA
    • BRE

    • This issue occurs on all releases from RHDM 7.1.0 to 7.9.0.

    • False
    • False
    • Release Notes
    • CR1
    • +
    • Undefined
    • Hide
      1. Extract reproducer. 
        $ unzip reproducer_model_compiler_7a.zip
$ cd reproducer_model_compiler_7a
      2. Build and execute the rule. 
        $ ./run_mvn    # mvn clean compile exec:exec -DgenerateModel=YES
    :
    :
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile-1) @ reproducer_model_compiler_7a ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 13 source files to /work2/testdir/reproducer_model_compiler_7a/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /work2/testdir/reproducer_model_compiler_7a/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/Rulese69ee9f6a2a84acaa675792cae099156RuleMethods0.java:[28,63] method accumulate in class org.drools.model.DSL cannot be applied to given types;
  required: org.drools.model.view.ViewItem<?>,org.drools.model.functions.accumulate.AccumulateFunction,org.drools.model.functions.accumulate.AccumulateFunction[]
  found: org.drools.model.view.ViewItem
  reason: cannot infer type-variable(s) T
    (actual and formal argument lists differ in length)
[INFO] 1 error
[INFO] -------------------------------------------------------------
    :
    :
      Show
      Extract reproducer. $ unzip reproducer_model_compiler_7a.zip $ cd reproducer_model_compiler_7a Build and execute the rule. $ ./run_mvn # mvn clean compile exec:exec -DgenerateModel=YES : : [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile-1) @ reproducer_model_compiler_7a --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 13 source files to /work2/testdir/reproducer_model_compiler_7a/target/classes [INFO] ------------------------------------------------------------- [ERROR] COMPILATION ERROR : [INFO] ------------------------------------------------------------- [ERROR] /work2/testdir/reproducer_model_compiler_7a/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/Rulese69ee9f6a2a84acaa675792cae099156RuleMethods0.java:[28,63] method accumulate in class org.drools.model.DSL cannot be applied to given types; required: org.drools.model.view.ViewItem<?>,org.drools.model.functions.accumulate.AccumulateFunction,org.drools.model.functions.accumulate.AccumulateFunction[] found: org.drools.model.view.ViewItem reason: cannot infer type-variable(s) T (actual and formal argument lists differ in length) [INFO] 1 error [INFO] ------------------------------------------------------------- : :
    • 2021 Week 07-09 (from Feb 15)

    Description

      Building a rule written in MVEL dialect like (*1) using AND in source pattern of accumulate like (*1-1) in executable rule model, a compilation error (*2) occurs. This issue does not occur when we build the rule with executable model disabled.

      (*1)

      package com.example.reproducer

import java.math.BigDecimal

dialect "mvel"

rule "rule7a2"
    when
        $total : BigDecimal() from accumulate( $car : Car( discontinued == true ) and Order( item == $car, $price : price ),    // ..... (*1-1)
                                               init( BigDecimal total = BigDecimal.ZERO; ),
                                               action( total += $price; ),
                                               reverse( total -= $price; ),
                                               result( total ) )
    then
        System.out.println("***** Action of rule7a2 -- $total = " + $total);
end

      (*2)

      [ERROR] /work2/testdir/reproducer_model_compiler_7a/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/Rulese69ee9f6a2a84acaa675792cae099156RuleMethods0.java:[28,63] method accumulate in class org.drools.model.DSL cannot be applied to given types;
  required: org.drools.model.view.ViewItem<?>,org.drools.model.functions.accumulate.AccumulateFunction,org.drools.model.functions.accumulate.AccumulateFunction[]
  found: org.drools.model.view.ViewItem
  reason: cannot infer type-variable(s) T
    (actual and formal argument lists differ in length)

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          Bug - A problem that impairs or prevents the functions of the product. DROOLS-5928 The use of AND in source pattern of accumulate causes compilation error in executable model.

          • 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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            People

              mfusco@redhat.com Mario Fusco
              rhn-support-myoshida Masato Yoshida
              Daniel Rosa Daniel Rosa
              Daniel Rosa Daniel Rosa
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                Created:
                Updated:
                Resolved: