Details
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Bug
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Resolution: Done
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Major
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7.10.0.GA
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False
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False
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CR1
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+
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2021 Week 10-12 (from Mar 8)
Description
When building a rule (*1) that contains a parenthesized expression statement written in MVEL dialect like (*1-1) with executable model enabled, a compilation error occurs with the message like (*3) in RHDM 7.10.0 because the statement (*2) not allowable in Java language [1] is generated from (*1-1).
(*1)
package com.example.reproducer
import java.math.BigDecimal
dialect "mvel"
rule "rule21a1"
when
$bus : Bus()
then
BigDecimal bd1 = 0;
BigDecimal bd2 = bd1.add($bus.weight);
(bd2 *= $bus.weight); // ........................... (\*1-1)
System.out.println("***** " + $bus + ", weight = " + $bus.weight);
System.out.println("***** bd2 = " + bd2);
end
(*2) Java code generated from (*1-1) in RHDM 7.10.0
(bd2 *= $bus.weight);
(*3) Error message
02:46:10.576 [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile-1) @ reproducer_model_compiler_21a --- 02:46:10.579 [INFO] Changes detected - recompiling the module! 02:46:10.580 [INFO] Compiling 6 source files to /work2/testdir/reproducer_model_compiler_21a/target/classes 02:46:10.616 [INFO] ------------------------------------------------------------- 02:46:10.616 [ERROR] COMPILATION ERROR : 02:46:10.617 [INFO] ------------------------------------------------------------- 02:46:10.617 [ERROR] /work2/testdir/reproducer_model_compiler_21a/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/P9D/LambdaConsequence9D5AE9174B6338FFA1F398238E0AE1A8.java:[23,9] not a statement 02:46:10.617 [INFO] 1 error 02:46:10.617 [INFO] -------------------------------------------------------------
[1] The Java Language Specification Java SE 11 Edition - 14.8. Expression Statements
https://docs.oracle.com/javase/specs/jls/se11/html/jls-14.html#jls-14.8
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