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  1. Drools
  2. DROOLS-5887

The enhanced "for" (foreach) statement causes compilation error in executable models.

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major Major
    • None
    • None
    • executable model
    • 2020 Week 49-51 (from Nov 30)
    • Hide 
      $ unzip reproducer_02801729_1a.zip
$ cd reproducer_02801729_1a
$ mvn clean compile exec:exec    # or mvn clean compile exec:exec -DgenerateModel=YES
    :
    :
[INFO] --- kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel (default-generateModel) @ reproducer_02801729_1a ---
    :
    :
[ERROR] Unable to build KieBaseModel:rules
CompilationProblemErrorResult: org.drools.mvelcompiler.MvelCompilerException: Type check of for (Bus bus : $buses) {
    System.out.println("bus: " + bus);
} failed.

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.776 s
[INFO] Finished at: 2020-11-20T01:02:26+09:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.kie:kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel (default-generateModel) on project reproducer_02801729_1a: Execution default-generateModel of goal org.kie:kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel failed: Unable to get KieModule, Errors Existed: Error Messages:
[ERROR] Message [id=1, kieBase=rules, level=ERROR, path=com/example/reproducer/Sample.drl, line=0, column=0
[ERROR]    text=org.drools.mvelcompiler.MvelCompilerException: Type check of for (Bus bus : $buses) {
[ERROR]     System.out.println("bus: " + bus);
[ERROR] } failed.]
[ERROR] ---
[ERROR] Warning Messages:
[ERROR] ---
[ERROR] Info Messages:
[ERROR] 
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
      Show
      $ unzip reproducer_02801729_1a.zip $ cd reproducer_02801729_1a $ mvn clean compile exec:exec # or mvn clean compile exec:exec -DgenerateModel=YES : : [INFO] --- kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel (default-generateModel) @ reproducer_02801729_1a --- : : [ERROR] Unable to build KieBaseModel:rules CompilationProblemErrorResult: org.drools.mvelcompiler.MvelCompilerException: Type check of for (Bus bus : $buses) { System.out.println("bus: " + bus); } failed. [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.776 s [INFO] Finished at: 2020-11-20T01:02:26+09:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.kie:kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel (default-generateModel) on project reproducer_02801729_1a: Execution default-generateModel of goal org.kie:kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel failed: Unable to get KieModule, Errors Existed: Error Messages: [ERROR] Message [id=1, kieBase=rules, level=ERROR, path=com/example/reproducer/Sample.drl, line=0, column=0 [ERROR] text=org.drools.mvelcompiler.MvelCompilerException: Type check of for (Bus bus : $buses) { [ERROR] System.out.println("bus: " + bus); [ERROR] } failed.] [ERROR] --- [ERROR] Warning Messages: [ERROR] --- [ERROR] Info Messages: [ERROR] [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
    • Undefined
    • NEW
    • NEW
    • ---
    • ---

      Compiling a rule like (*1) which is described in MVEL dialect and contains the enhanced "for" (foreach) statement in the action part with executable rule models enabled, compilation error like (*2) occurs at the enhanced "for" statement.

      (*1)

      package com.example.reproducer

import java.util.ArrayList
import com.example.reproducer.Bus

dialect "mvel"

rule "bus1"
    when
        $buses : ArrayList() from collect ( Bus() )
    then
        for (Bus : $buses ) {
            System.out.println("bus: " + bus);
        }
end

      (*2)

      [ERROR] Unable to build KieBaseModel:rules
CompilationProblemErrorResult: org.drools.mvelcompiler.MvelCompilerException: Type check of for (Bus bus : $buses) {
 System.out.println("bus: " + bus);
} failed.

        1. reproducer_02801729_1a.zip
          9 kB

              lmolteni@redhat.com Luca Molteni
              lmolteni@redhat.com Luca Molteni
              Daniel Rosa Daniel Rosa
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                Created:
                Updated:
                Resolved: