Job Application Problem

[Carlo Baumann]

Hi at all

My problem to solve is the following. I have employees and jobs. A job is of a specific profile (Dev, Manager, etc). Same for the employees. An employee can applicate on jobs. On every job application the employee can give a priority. Same on the job side.

These are the constraints:

Hard 1: An employee can only be assigned to one job

Hard 2: A job can only be assigned to one employee

Hard 3: The profile of the employee must match the profile of the job

Soft 1: The job with the highest priority is assigned (highest priority = 2*prio_emp + prio_job)

I'm struggling now on the hard constraint 3

// An employee and a job must have the same profile
private fun profileConstraint(constraintFactory: ConstraintFactory): Constraint {
return constraintFactory.from(Employee::class.java)
.join(Job::class.java, Joiners.equal(Employee::profile, Job::profile))
.penalize("profile constraint", HardSoftScore.ONE_HARD)
}

I also tried with filter.

In the solution are employees with the wrong job profile.

What is wrong on this constraint?

Thanks for your help.

Carlo

[Carlo Baumann]

Here is my repo: https://github.com/bananenhoschi/Praktik

[Radovan Synek]

Hi Carlo,

the "profileConstraint" does the exact opposite of what it's supposed to do by your description: it penalizes the solution for every pair of Employee and Job with a matching profile.

Instead, you might want to ".filter()" only the employees that are assigned to a job with a different profile. Something like:

.from(Employee.class)

.filter(employee -> !employee.profile.equals(employee.job.profile))

.penalize("profile constraint", HardSoftScore.ONE_HARD)

Hope that helps,

Radek

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Radovan Synek

Principal Software Engineer, Business Automation

Red Hat EMEA

Brno, Czech Republic