c# - Using Reflection to Upsert Derived Entities in Generic Repository -

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a bit new @ repository pattern. trying build generic repository handle state changes derived entities. i've done far create custom attribute flag property 1 needs upserted.

attribute:

public class derivedobjectattribute : attribute {     public enum entitytype     {         reference,         object     }      public entitytype derivedtype { get; set; } }

i define attribute property on want cascade state changes.

sample entity:

public class fightingcharacter : baseentity  {     public costume costume { get; set; }      [derivedobject(derivedtype=derivedobjectattribute.entitytype.reference)]     public specialfinish specialfinish { get; set; }      [derivedobject(derivedtype = derivedobjectattribute.entitytype.reference)]     public list<movelist> movelist { get; set; } }

so class, costume property not need cascade, specialfinish , movelist properties should.

then in repository:

public class datarepository<t> : irepository<t> t : baseentity {     private void tryderivedupsert(t entity)     {         type type = entity.gettype();         propertyinfo[] pilist = type.getproperties();         foreach (propertyinfo pi in pilist)         {             foreach (derivedobjectattribute attr in pi.getcustomattributes(typeof(derivedobjectattribute), false))             {                 // here?             }         }     } }

in innermost loop, i'm able pinpoint derivedobjectattributes without problem. question is: how obtain type , value of object, upsert it? in other words: if property pi flagged cascade changes, create repo cast appropriate entity, , upsert it. e.g.:

datarepository<entitytype> repo = new datarepository<entitytype> (); repo.upsert(property entitytype);

does make sense? or going generic repo entirely wrong way? if make sense (i'll surprised), how it? (the examples listed here examples, btw. i'm still architecting , have no ef classes @ yet.)

you value pi.getvalue(entity, null), , create generic repository (activate.createinstance) property type (from pi), have lot of reflection.

in case should think dropping classic generic repository idea (separate repository per type) , use extended dbcontext, can handle types.

if have disconnected scenario (wcf), main problem ef itself, because have replicate changes nested lists on server side , manually change entitystate.


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