Grab a Component by Type within a Job

I'm trying to build a Stat - Affect system. My first attempt was a unique system, component, and affect buffer for each stat, but it smelled like a bad design. So, I thought maybe I could use a single dynamic buffer of affects where each affect holds a reference to whichever stat component it should modify. I'm unsure if there's a proper way to do something akin to the code below, or if it's a bad idea:

Code (CSharp):

1. public struct Health : IComponentData
2. {
3.     public int Value;
4.     public int MaxValue;
5. }
6.  
7. // unknown number of other stats with same fields
8.  
9. public struct StatAffect : IBufferElementData
10. {
11.     public Type TargetComponent;
12.     public int Value;
13.     public int Iterations;
14.     public float Delay;
15.     public float Time;
16. }
17.  
18. public class StatAffectSystem : SystemBase
19. {
20.     protected override void OnUpdate ()
21.     {
22.         // [NativeDisableParallelForRestriction]  
23.         Entities.ForEach( (Entity entity, DynamicBuffer<StatAffect> statAffectBuffer) => {
24.            
25.             foreach (var statAffect in statAffectBuffer)
26.             {
27.                 // get some Entity component using statAffect.TargetComponent
28.                 // logic to modify component
29.                 // write to component with updated values
30.             }
31.         })
32.         .ScheduleParallel();
33.     }
34. }

 

No idea why there's a duplicate thread. Let's use this one.