c# - Move Unity code-as-config to XML when having abstract class in between -

i've got working unity container configured code. have move xml configuration, can't make correctly. don't know missing - maybe out there knows solution , can me out!

my solution layering fix protocol library correctly, handle different vendor specific messages differently, have robust backing api that. have 2 interfaces:

public interface icriteria {     bool aremet(message message); }  public interface iconsumer {     icriteria criteria { get; }     void handlemessage(message message); } 

there default abstract implementation consumers:

namespace fix.messagehandling {     public abstract class consumer : iconsumer     {         private readonly icriteria criteria;         protected readonly iprocessor processor;          public icriteria criteria         {             { return this.criteria; }         }          protected consumer(iprocessor processor, icriteria criteria)         {            //...         }     } } 

then i've got abstract implementations different fix message types: each consumer abstraction has own criteria abstraction. (referenced in constructor well) e.g.

namespace fix.messagehandling.executionreport {     public abstract class consumer : messagehandling.consumer     {         protected consumer(iprocessor processor, criteria  criteria)             : base(processor, criteria)         {            // ...         }     }     public abstract class criteria : icriteria     {         // ...     } } 

i register icriteria instances code:

container.registertype<icriteria, vendor.criteria.spot>("spotcriteria"); container.registertype<icriteria, vendor.criteria.swap>("swapcriteria"); // etc. 

after register iconsumer insatnces, in case executionreportconsumer instances, mapping iconsumer:

container.registertype<             iconsumer,             vendor.consumer.spot>("spotconsumer",             new injectionconstructor(                 container.resolve<iprocessor>(),                 container.resolve<icriteria>("spotcriteria"))); // etc. 

when resolve iconsumer-s, can registered consumers unitycontainer:

container.resolveall<iconsumer>(); 

this how tried xml after defining aliases:

<register type="icriteria" mapto="forwardcriteria" name="forwardcriteria" /> <register type="iconsumer" mapto="forwardconsumer" name="forwardconsumer">   <constructor>     <param name="processor" dependencytype="iprocessor" />     <param name="criteria" dependencytype="executionreportcriteria" dependencyname="forwardcriteria" />   </constructor> </register> 

if use xml configuration , call resolveall iconsumers, i've got exception

resolution of dependency failed, type = "fix.messagehandling.iconsumer", name = "forwardconsumer". exception occurred while: while resolving.

exception is: invalidoperationexception - type criteria not have accessible constructor.

at time of exception, container was:

resolving fix.vendor.consumer.forward,forwardconsumer (mapped fix.messagehandling.iconsumer, forwardconsumer) resolving parameter "criteria" of constructor fix.vendor.consumer.forward(fix.messagehandling.iprocessor processor, fix.messagehandling.executionreport.criteria criteria) resolving fix.messagehandling.executionreport.criteria,forwardcriteria

ok, figured out myself , i'm newbie , don't know - answer own question :]

if register criteria interface , concrete criteria implementations correct abstract base class, works charm!

<register type="icriteria" /> <register type="executionreportcriteria" mapto="forwardcriteria" name="forwardcriteria" /> <register type="iconsumer" mapto="forwardconsumer" name="forwardconsumer">   <constructor>     <param name="processor" dependencytype="iprocessor" />     <param name="criteria" dependencyname="forwardcriteria" />   </constructor> </register>