[jboss-jira] [JBoss JIRA] Updated: (JBRULES-3130) Regression. Rule misfires due to constraint list[0].field1/2 in two rules

[Wolfgang Laun (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3130?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wolfgang Laun updated JBRULES-3130:
-----------------------------------

    Description: 
A pair of constraints suich as list[0].a == null and list[0].b == null in two different rules causes one of the rules not to fire and the other one to fire erroneously (see results at the end).

Java:
------------------------------------------------------------
public class Three {
    private String a;
    private String b;
    private String c;
    public Three( String a, String b, String c ){
	this.a = a;
	this.b = b;
	this.c = c;
    }
    public String getA(){ return a; }
    public String getB(){ return b; }
    public String getC(){ return c; }
}
---------------------------------------------------------------
import java.util.*;
public class ListOfThree {
    private List<Three> list;
    private Class<?> clazz;
    public ListOfThree( Three three, Class<?> clazz ){
	list = new ArrayList<Three>();
	list.add( three );
        this.clazz = clazz;
    }
    public List<Three> getList(){ return list; }
    public Class<?> getClazz(){	return clazz; }
}
----------------------------------------------------------------
// Insertion of facts
        Three three = new Three( "a", "b", "c" );
        ListOfThree listof3 = new ListOfThree( three, java.lang.Object.class );
        kSession.insert( listof3 );
        three = new Three( "x", null, "z" );
        listof3 = new ListOfThree( three, java.lang.String.class );
        kSession.insert( listof3 );
        three = new Three( null, "q", "r" );
        listof3 = new ListOfThree( three, java.lang.Integer.class );
        kSession.insert( listof3 );
--------------------------------------------------------------------------
rule 'rule1'
############################  dialect "mvel"   ## does not matter
when
    ListOfThree( list[0].a == null, $c: clazz );
then
    System.out.println( "rule1 " + $c.getSimpleName() );
end

rule 'rule2'
############################  dialect "mvel"   ## does not matter
when
    ListOfThree( list[0].b == null, $c: clazz  );
then
    System.out.println( "rule2 " + $c.getSimpleName() );
end
---------------------------------------------------------------
Results:
rule2 Integer
rule1 Integer



  was:
A pair of constraints suich as list[0].a == null and list[0].b == null in two different rules causes one of the rules not to fire and the other one to fire erroneously (see results at the end).

Java:
================================================================
public class Three {
    private String a;
    private String b;
    private String c;
    public Three( String a, String b, String c ){
	this.a = a;
	this.b = b;
	this.c = c;
    }
    public String getA(){ return a; }
    public String getB(){ return b; }
    public String getC(){ return c; }
}
================================================================
import java.util.*;
public class ListOfThree {
    private List<Three> list;
    private Class<?> clazz;
    public ListOfThree( Three three, Class<?> clazz ){
	list = new ArrayList<Three>();
	list.add( three );
        this.clazz = clazz;
    }
    public List<Three> getList(){ return list; }
    public Class<?> getClazz(){	return clazz; }
}
================================================================
// Insertion of facts
        Three three = new Three( "a", "b", "c" );
        ListOfThree listof3 = new ListOfThree( three, java.lang.Object.class );
        kSession.insert( listof3 );
        three = new Three( "x", null, "z" );
        listof3 = new ListOfThree( three, java.lang.String.class );
        kSession.insert( listof3 );
        three = new Three( null, "q", "r" );
        listof3 = new ListOfThree( three, java.lang.Integer.class );
        kSession.insert( listof3 );
===================================================================
rule 'rule1'
############################  dialect "mvel"   ## does not matter
when
    ListOfThree( list[0].a == null, $c: clazz );
then
    System.out.println( "rule1 " + $c.getSimpleName() );
end

rule 'rule2'
############################  dialect "mvel"   ## does not matter
when
    ListOfThree( list[0].b == null, $c: clazz  );
then
    System.out.println( "rule2 " + $c.getSimpleName() );
end
=================================================================
Results:
rule2 Integer
rule1 Integer





> Regression. Rule misfires due to constraint list[0].field1/2 in two rules
> -------------------------------------------------------------------------
>
>                 Key: JBRULES-3130
>                 URL: https://issues.jboss.org/browse/JBRULES-3130
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.2.0.Final
>            Reporter: Wolfgang Laun
>            Assignee: Mark Proctor
>            Priority: Critical
>             Fix For: 5.2.1.Final
>
>
> A pair of constraints suich as list[0].a == null and list[0].b == null in two different rules causes one of the rules not to fire and the other one to fire erroneously (see results at the end).
> Java:
> ------------------------------------------------------------
> public class Three {
>     private String a;
>     private String b;
>     private String c;
>     public Three( String a, String b, String c ){
> 	this.a = a;
> 	this.b = b;
> 	this.c = c;
>     }
>     public String getA(){ return a; }
>     public String getB(){ return b; }
>     public String getC(){ return c; }
> }
> ---------------------------------------------------------------
> import java.util.*;
> public class ListOfThree {
>     private List<Three> list;
>     private Class<?> clazz;
>     public ListOfThree( Three three, Class<?> clazz ){
> 	list = new ArrayList<Three>();
> 	list.add( three );
>         this.clazz = clazz;
>     }
>     public List<Three> getList(){ return list; }
>     public Class<?> getClazz(){	return clazz; }
> }
> ----------------------------------------------------------------
> // Insertion of facts
>         Three three = new Three( "a", "b", "c" );
>         ListOfThree listof3 = new ListOfThree( three, java.lang.Object.class );
>         kSession.insert( listof3 );
>         three = new Three( "x", null, "z" );
>         listof3 = new ListOfThree( three, java.lang.String.class );
>         kSession.insert( listof3 );
>         three = new Three( null, "q", "r" );
>         listof3 = new ListOfThree( three, java.lang.Integer.class );
>         kSession.insert( listof3 );
> --------------------------------------------------------------------------
> rule 'rule1'
> ############################  dialect "mvel"   ## does not matter
> when
>     ListOfThree( list[0].a == null, $c: clazz );
> then
>     System.out.println( "rule1 " + $c.getSimpleName() );
> end
> rule 'rule2'
> ############################  dialect "mvel"   ## does not matter
> when
>     ListOfThree( list[0].b == null, $c: clazz  );
> then
>     System.out.println( "rule2 " + $c.getSimpleName() );
> end
> ---------------------------------------------------------------
> Results:
> rule2 Integer
> rule1 Integer

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