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POHow to write a StructureMap Scanner for this case
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  1. POHow to write a StructureMap Scanner for this case
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    copied!<p>I have these registrations in a registry and am trying to figure out the correct way to implement them with a scanner instead of manual registration.</p> <pre><code>For&lt;ISomeView&gt;.Use(HttpContext.Current.CurrentHandler) For&lt;IOtherView&gt;.Use(HttpContext.Current.CurrentHandler) For&lt;IAnotherView&gt;.Use(HttpContext.Current.CurrentHandler) </code></pre> <p>And so on. I have ever one of my interfaces inherent from <code>IView</code> to be used as a marker interface.</p> <p>My original attempt came out looking like this</p> <pre><code>public void Process(Type type, Registry registry) { Type _pluginType = typeof(IView); if (type.CanBeCastTo(_pluginType) &amp;&amp; type.IsInterface) { string name = type.Name; registry.AddType(_pluginType, type, name); registry.For(_pluginType).Use(HttpContext.Current.CurrentHandler); } } </code></pre> <p>This however caused my physical ASP.NET pages to be registered as itself instead. This is what I got from WhatDoIHave()</p> <pre><code>the_page_aspx (ASP.the_page_aspx) - 36d0cdb2-7118-4a1d-94a0-8de1b5ddc357 - Configured Instance of ASP.the_page_aspx, App_Web_4q8pukge, Version... </code></pre> <p><strong>Edit:</strong> To respond to KevM's comment what I want to acheive is anytime StructureMap needs to inject any single of my IView's that it resolves it by by returning <code>HttpContext.Current.CurrentHandler</code></p> <p>So if I'd call <code>ObjectFactory.Resolve&lt;ISomeView&gt;()</code> I would get <code>(ISomeView)HttpContext.Current.CurrentHandler</code> </p> <p>If I have a constructor that was <code>SomePresenter(IListView listView, IEditView editView)</code> that those would be resolved to <code>(IListView)HttpContext.Current.CurrentHandler</code> and <code>(IEditView)HttpContext.Current.CurrentHandler</code>. </p> <p>I could do this with numerous <code>For&lt;&gt;.Use()</code> statements as in my example which means I should be able to achieve it with a scanner instead of needing to explicitly register each one manually. My interfaces will always be named I_____View if the naming convention would help for writing the scanner. I'm just not sure what I need to use in the if statement I have above for the <code>Process()</code> method.</p> <p><strong>Update:</strong> With the answer from @KevM it pointed me in the right direction to this</p> <pre><code>public class ViewScanner : IRegistrationConvention { public void Process(Type type, Registry registry) { if (type.IsA&lt;IView&gt;() &amp;&amp; !type.IsConcrete()) { registry.For(type).Use(c =&gt; HttpContext.Current.CurrentHandler); } } } </code></pre> <p>(IsA&lt;> is just an extension for IsAssignableFrom since to me the usage of it feels backwards)</p>
 

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