[rules-users] Comparing 2 Lists [Planner]

[André Fróes]

I found (i guess) a way to iterate over list, but it is not comparing and
assigning the workorder now. I tried this way:
-----------------
rule "requiredSkill"
   when
       There is an unassigned workorder
       and the workorder has a requiredSkill other than null

       and there is an engineer
       and the engineer has a skill other than null

       and engineer skill is the same as workorder skill
   then
       assign workorder to engineer
engineer
-----------------
this is how i tried implementing;
-----------------
rule "requiredSkill"
when
$workOrder : WorkOrder()
    $woReqSkill : SkillWorkOrder($requiredSkillWO : skill , eval(skill !=
null)) from $workOrder.requiredSkills

    $engineer : Engineer()
    $engineerSkill : SkillEngineer($engSkill : skill, eval(skill != null))
from $engineer.skillEngineerList

    exists SkillEngineer( $engineerSkill.skill == $woReqSkill.skill )
then
insertLogical(new IntConstraintOccurrence("requiredSkill",
ConstraintType.NEGATIVE_HARD,
1, $engineer));
end
-----------------
But all workorders are going to the same one, it is not validating if one
is equals to other.


2013/2/18 André Fróes <arfmoraes at gmail.com>

> Hello everyone!
>
> How can I compare 2 lists with a rule?
> I upgraded my basic model to a more complex one now, but now I hit a wall.
> My WorkOrder have a List of skills, and my Engineer also have a list of
> Skills and I have to compare one with another.
>
> Example:
>
> Engineer A have skill ABC 1
> Engineer B have skill ABC 2
> Engineer C have skill ABC 3
>
> WorkOrder A needs an engineer with skill ABC 3
> WorkOrder B needs an engineer with skill ABC 1
> WorkOrder C needs an engineer with skill ABC 2
>
> The result should be this:
>
> Engineer A will receive WorkOrder B
> Engineer B will receive WorkOrder C
> Engineer C will receive WorkOrder A
> ---------------
>
> I am able to sort it by time, but not by skill, and I don't know how to
> loop over each list to find if one have the skills needed to fulful the
> other. These are my classes involved:
>
> WorkOrder attributes:
> --------
> private int requiredWorktime;
> private Priority priority;(enum)
> private Severity severity;(enum)
> private List<SkillWorkOrder> requiredSkills;
> --------
> Engineer attributes:
> --------
> private int worktime;
> private String name;
> private List<SkillEngineer> skillEngineerList;
> --------
> Skill attributes:
> --------
> private String name;
> --------
>
> both SkillEngineer and SkillWorkOrder are classes that simple receives the
> named class and a Skill:
> Eg:
> private Engineer engineer; //Or WorkOrder
> private Skill skill;
>
> Is it possible to iterate over these 2 lists, by drool rule, to check wich
> engineer have most coincidences with an workorder? (Eg: if and Engineer
> have skill ABC1, ABC2 and a WorkOrder needs an engineer with skill ABC1,
> ABC2 and ABC3 he would be choseng among the others because his skills)
>
>
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