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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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Undefined
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2021 Week 10-12 (from Mar 8)
When building a rule (*1) that contains a BigDecimal-type arithmetic operations 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. The model compiler generates java code (*2) from (*1-1) but the generated code is not sufficient to perform BigDecimal-type arithmetic operations.
(*1)
package com.example.reproducer
import java.math.BigDecimal
dialect "mvel"
rule "rule21b1"
when
$bus : Bus()
then
BigDecimal bd1 = 10;
BigDecimal bd2 = 20;
$bus.weight = $bus.weight + (bd1.multiply(bd2)); .............. (\*1-1)
System.out.println("***** " + $bus + ", weight = " + $bus.weight);
end
(*2) Java code generated from (*1-1) in RHDM 7.10.0
$bus.setWeight($bus.getWeight() + bd1.multiply(bd2));
(*3) Error message
05:29:18.595 [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile-1) @ reproducer_model_compiler_21b --- 05:29:18.598 [INFO] Changes detected - recompiling the module! 05:29:18.599 [INFO] Compiling 6 source files to /work2/testdir/reproducer_model_compiler_21b/target/classes 05:29:18.814 [INFO] ------------------------------------------------------------- 05:29:18.814 [ERROR] COMPILATION ERROR : 05:29:18.814 [INFO] ------------------------------------------------------------- 05:29:18.814 [ERROR] /work2/testdir/reproducer_model_compiler_21b/target/generated-sources/drools-model-compiler/main/java/com/example/reproducer/PC3/LambdaConsequenceC3EC93517F775872A1B91F3DCC90DB9B.java:[23,41] bad operand types for binary operator '+' first type: java.math.BigDecimal second type: java.math.BigDecimal 05:29:18.815 [INFO] 1 error 05:29:18.815 [INFO] -------------------------------------------------------------
Other operations cause compilation errors as well as '+' operation.
- $bus.weight = $bus.weight - (bd1.multiply(bd2))
- $bus.weight = $bus.weight * (bd1.multiply(bd2))
- $bus.weight = $bus.weight / (bd1.multiply(bd2))
On the releases from RHDM 7.9.0 to 7.9.1, the expression using '+' or '-' operator was successfully compiled and executed.
- $bus.weight = $bus.weight + (bd1.multiply(bd2))
- $bus.weight = $bus.weight - (bd1.multiply(bd2))
- is cloned by
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- Closed
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