[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1461) comment leads to org.mvel.PropertyAccessException
[ http://jira.jboss.com/jira/browse/JBRULES-1461?page=comments#action_12399043 ]
Godmar Back commented on JBRULES-1461:
--------------------------------------
Here's another test:
package test;
dialect "mvel"
rule "Rule #1"
when
then
System.out.println("now computing 1+1...");
Integer two = new Integer(2);
System.out.println(two);
end
---
it works if I
- use dialect "java" instead of "mvel"
- comment out the first System.out with a single-line comment, as in
// System.out.println("now computing 1+1...");
it also breaks if use a multi-line comment, as in:
/* System.out.println("now computing 1+1..."); */
I'm using the downloaded 4.0.4 with the mvel14-1.2.21.jar, btw, and the
antlr-runtime-3.0.jar included in that tarball.
comment leads to org.mvel.PropertyAccessException
-------------------------------------------------
Key: JBRULES-1461
URL: http://jira.jboss.com/jira/browse/JBRULES-1461
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.4
Reporter: Godmar Back
I'm still fighting with Drools's parser.
This code:
package test;
import java.util.ArrayList;
import java.util.HashMap;
dialect "mvel"
rule "Rule #1"
when
then
/* a comment */
System.out.println("hello world");
end
produces:
org.mvel.PropertyAccessException: unable to resolve property: ;
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:285)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:107)
at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:185)
at org.mvel.MVELRuntime.execute(MVELRuntime.java:88)
at org.mvel.CompiledExpression.getValue(CompiledExpression.java:107)
at org.mvel.MVEL.executeExpression(MVEL.java:223)
at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:47)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:550)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:514)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:471)
at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:433)
at org.libx.autodetect.DroolsDriver$Host.fireAllRules(DroolsDriver.java:63)
at org.libx.autodetect.DroolsDriver.main(DroolsDriver.java:135)
Caused by: org.mvel.PropertyAccessException: unable to resolve property: ;
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(ReflectiveAccessorOptimizer.java:373)
at
org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:254)
... 12 more
but this works:
package test;
import java.util.ArrayList;
import java.util.HashMap;
dialect "mvel"
rule "Rule #1"
when
then
// a single-line comment
System.out.println("hello world");
end
It makes it *very* difficult to use Drools if one has to work around such silly bugs.
As a matter of fact, Drools does not seem to handle the presence of multi-line comments
in a RHS well.
(Even though the documentation says they're ok:
http://downloads.jboss.com/drools/docs/4.0.4.17825.GA/html_single/index.h...
Not sure what is going on. I looked at:
http://viewvc.jboss.org/cgi-bin/viewvc.cgi/labs/labs/jbossrules/branches/...
which appears to be correct and sends multiline comments to ANTLR's hidden channel.
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