[rules-users] Trouble using || operator and after evaluator in constraints in 5.4.0.Final

[Wolfgang Laun]

For the operations "a contains b" and "b memberOf a", operand a must
be a Collection or array; your MyObjectList is neither.

5.3.0 had less strict compile time checks; 5.4.0 fixed this.

I am surprised that this ever executed correctly. Did it really, with
the rule and classes exactly as shown?

-W


On 16/08/2012, abr <alexis.brouard at haulogy.net> wrote:
> Hi everyone,
>
> I've tried to go from Drools 5.3.0.Final to 5.4.0.Final and some strange
> errors appeared on constraints using the after evaluator and the ||
> operator.
>
> For instance, considering these 2 objects :
>
> public class MyObject {
>
> 	private Date myDate;
>
> 	public MyObject(Date myDate) {
> 		super();
> 		this.myDate = myDate;
> 	}
>
> 	public Date getMyDate() {
> 		return myDate;
> 	}
>
> 	public void setMyDate(Date myDate) {
> 		this.myDate = myDate;
> 	}
> 	
> }
>
> public class MyObjectList {
>
> 	private List<MyObject> myObjectList;
>
> 	public MyObjectList() {
> 		super();
> 		this.myObjectList = new ArrayList<MyObject>();
> 	}
>
> 	public List<MyObject> getMyObjectList() {
> 		return myObjectList;
> 	}
>
> 	public void setMyObjectList(List<MyObject> myObjectList) {
> 		this.myObjectList = myObjectList;
> 	}
> 	
> 	public void addObject(MyObject myObject) {
> 		this.myObjectList.add(myObject);
> 	}
> 	
> }
>
>
> This rule:
>
> rule "Sample rule"
>     when
>     	CurrentDate( $now: now )
>         $list: MyObjectList()
>         $obj: MyObject(
>         		this memberOf $list,
>         		( myDate == null ||
>         		  myDate after[ 5d ] $now ) )
>     then
>         System.out.println( "Sample rule activated" );
> end
>
>
> Provokes the following error:
>
> Unable to Analyse Expression $list contains this && ( myDate == null ||
> after0.evaluate( myDate, $now ) ):
> [Error: unable to resolve method using strict-mode:
> com.sample.MyObject.after0()]
> [Near : {... ( myDate == null || after0.evaluate( myDate, $now ....}]
>              ^ : [Rule name='Sample rule']
>
>
> This worked very well in Drools 5.3.0.Final.
>
> The strangest thing about this issue is that, if I change the || into a &&,
> compilation works correctly!
>
> Is there some configuration specific to Drools 5.4.0.Final that I've missed
> in the release notes?
>
> Thanks in advance for your help.
>
> Best,
> Alexis
>
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Trouble-using-operator-and-after-evaluator-in-constraints-in-5-4-0-Final-tp4019181.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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