[jboss-jira] [JBoss JIRA] (JBRULES-3581) Couldn't anymore personalize comparison method since drools 5.4.0
david crosson created JBRULES-3581:
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Summary: Couldn't anymore personalize comparison method since drools
5.4.0
Key: JBRULES-3581
URL: https://issues.jboss.org/browse/JBRULES-3581
Project: Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: drools-compiler
Affects Versions: 5.4.0.Final
Environment: JVM Hotspot 1.6.0_33 ; sbt 0.11.3 ; scala 2.9.2 ; Linux
3.2.1-gentoo-r2 ;
Reporter: david crosson
Assignee: Mark Proctor
I can't write anymore (since 5.4.0) straightforward rules such as :
rule "linux kernel too old"
when
s:LinuxServer(release < "2.6.18")
then
insert(new ConfWarning(s,
"Linux kernel is too old "+s.name))
end
where release is using Release type with a dedicated comparator :
case class Release(
name:String
) extends Ordered[AnyRef] {
override def compare(that:AnyRef) : Int = that match {
case Release(thatname) => NaturalSort.ord.compare(name, thatname)
case thatname:String => NaturalSort.ord.compare(name, thatname)
case _ => 1
}
}
I got the following error with the latest drools (it was ok with previous releases) :
[Error: Comparison operation requires compatible types. Found class
com.orange.confxpert.model.Release and class java.lang.String]
I know that type enforcing is very important, but we should have a way to choose how
strict must be type enforcements.
User experience is very important, saying release < "2.6.18" is quite more
user friendly than saying release < Release.fromString("2.6.18"). This is an
important issue, as rules may be written by non IT people.
[info] Running com.orange.confxpert.Main -a -r -v examples/xxxx/yyyyy
Unable to Analyse Expression release < "2.6.18":
[Error: Comparison operation requires compatible types. Found class xxxxx.model.Release
and class java.lang.String]
[Near : {... release < "2.6.18" ....}]
^ : [Rule name='linux kernel too old']
[error] (run-main) java.lang.IllegalArgumentException: Could not parse knowledge.
java.lang.IllegalArgumentException: Could not parse knowledge.
at
org.drools.builder.impl.KnowledgeBuilderImpl.newKnowledgeBase(KnowledgeBuilderImpl.java:73)
at zzzzzz.Main$.analyze(Main.scala:66)
at zzzzzz..Main$$anonfun$main$1.apply(Main.scala:98)
at zzzzzz..Main$$anonfun$main$1.apply(Main.scala:96)
at scala.Option.map(Option.scala:133)
at zzzzzz..Main$.main(Main.scala:96)
at zzzzzz..Main.main(Main.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
java.lang.RuntimeException: Nonzero exit code: 1
at scala.sys.package$.error(package.scala:27)
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