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  1. Drools
  2. DROOLS-4374

Compilation error for "from accumulate" init() with executable-model or not

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    • 2019 Week 29-31, 2019 Week 32-34
    • 3
    • Hide
      • Build the DRL with/without -DgenerateModel=YES 
        import org.drools.modelcompiler.domain.Person;
rule R when
  $sum : Integer() from accumulate (
            Person( age > 18, $age : age ),
                init( int sum = 0 ),
                action( sum += $age; ),
                reverse( sum -= $age; ),
                result( sum )
         )
then
  insert($sum);
end
      Show
      Build the DRL with/without -DgenerateModel=YES import org.drools.modelcompiler.domain.Person; rule R when $sum : Integer() from accumulate ( Person( age > 18, $age : age ), init( int sum = 0 ), action( sum += $age; ), reverse( sum -= $age; ), result( sum ) ) then insert($sum); end
    • NEW
    • NEW

      If we miss a semicolon in init() of "from accumulate",

      for example)

      import org.drools.modelcompiler.domain.Person;
rule R when
  $sum : Integer() from accumulate (
            Person( age > 18, $age : age ),
                init( int sum = 0 ),
                action( sum += $age; ),
                reverse( sum -= $age; ),
                result( sum )
         )
then
  insert($sum);
end
      • Not executable-model -> The DRL is compiled and executed successfully
      • Executable-model -> Throws ParseProblemException
      com.github.javaparser.ParseProblemException: (line 1,col 12) Parse error. Found "}", expected one of  "!=" "%" "%=" "&" "&&" "&=" "*" "*=" "+" "+=" "," "-" "-=" "->" "/" "/=" "::" ";" "<" "<<=" "<=" "=" "==" ">" ">=" ">>=" ">>>=" "?" "^" "^=" "instanceof" "|" "|=" "||"
Problem stacktrace : 
  com.github.javaparser.GeneratedJavaParser.generateParseException(GeneratedJavaParser.java:10567)
  com.github.javaparser.GeneratedJavaParser.jj_consume_token(GeneratedJavaParser.java:10426)
  com.github.javaparser.GeneratedJavaParser.BlockStatement(GeneratedJavaParser.java:3847)
  com.github.javaparser.GeneratedJavaParser.Statements(GeneratedJavaParser.java:1644)
  com.github.javaparser.GeneratedJavaParser.Block(GeneratedJavaParser.java:3822)
  com.github.javaparser.GeneratedJavaParser.BlockParseStart(GeneratedJavaParser.java:5687)
  com.github.javaparser.JavaParser.parse(JavaParser.java:115)
  com.github.javaparser.JavaParser.parseBlock(JavaParser.java:309)
  com.github.javaparser.StaticJavaParser.parseBlock(StaticJavaParser.java:240)
  org.drools.modelcompiler.builder.generator.visitor.accumulate.AccumulateVisitor.visitAccInlineCustomCode(AccumulateVisitor.java:434)
  ...

      I'm not very sure how it should be fixed. I filed this because of discrepancy between Executable-model and Not executable-model

      Poosible choices are:

      • Fail even in case of Not executable-model
      • Success in case of Executable-model

      Additonal Note: If we miss a semicolon in action(), a more understandable error message is thrown.

      [Message [id=1, kieBase=defaultKieBase, level=ERROR, path=r0.drl, line=2, column=0
   text=Rule Compilation error Syntax error, insert ":: IdentifierOrNew" to complete Expression
Syntax error, insert ";" to complete Statement]]

              lmolteni@redhat.com Luca Molteni
              rhn-support-tkobayas Toshiya Kobayashi
              Daniele Zonca Daniele Zonca
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                Created:
                Updated:
                Resolved: