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  1. Red Hat Decision Manager
  2. RHDM-1544

Variable binding of a property of Map element causes unexpected result in executable model.

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Details

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

    • This issue is found on RHDM 7.1.0 to RHDM 7.9.0.

    • False
    • False
    • +
    • Already fixed in 7.10
    • Hide
      • Extract reproducer. 
        $ unzip reproducer_mc_1a3.zip
$ cd reproducer_mc_1a3
      • Build and execute the rule. 
        $ ./run_mvn    # mvn clean compile exec:exec -DgenerateModel=YES
    :
    :
***** Action of rule1a3
***** $car: com.example.reproducer.Car@4b6690c0, transmission supplier name = A180
    :
    :

      Expected result: $supplierName is "ABC Precision Instruments" (the name property of Supplier object).

      Actual result: $supplierName is "A180" (the name property of Car object).

      Show
      Extract reproducer. $ unzip reproducer_mc_1a3.zip $ cd reproducer_mc_1a3 Build and execute the rule. $ ./run_mvn # mvn clean compile exec:exec -DgenerateModel=YES : : ***** Action of rule1a3 ***** $car: com.example.reproducer.Car@4b6690c0, transmission supplier name = A180 : : Expected result: $supplierName is "ABC Precision Instruments" (the name property of Supplier object). Actual result: $supplierName is "A180" (the name property of Car object).
    • 2020 Week 52-03 (from Dec 21)

    Description

      Building and executing a rule written in MVEL dialect like (*1) that accesses to a Map element and binds a property of the element to a variable (*1-1) in executable rule model, the bound variable is an unexpected value. This issue occurs on all releases from RHDM 7.1.0 to 7.9.0.

      (*1)

      package com.example.reproducer

import com.example.reproducer.Car

dialect "mvel"


rule "rule1a3"
    when
        $car : Car( $supplierName : suppliers["transmission"].name )    // ..... (*1-1)
    then
        System.out.println("***** Action of rule1a3");
        System.out.println("***** $car: " + $car + ", transmission supplier name = " + $supplierName);
end
// suppliers is a {{Map<String, Supplier>}} type property of Car class

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            lmolteni@redhat.com Luca Molteni
            rhn-support-myoshida Masato Yoshida
            Daniel Rosa Daniel Rosa
            Daniel Rosa Daniel Rosa
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            Dates

              Created:
              Updated:
              Resolved: