Scanner selector based on assembly type

src/6.0/Siren.Infrastructure.AssemblyLoad/AssemblyLoader.cs

@@ -0,0 +1,19 @@
+using System.Linq;
+using System.Reflection;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+
+namespace Siren.Infrastructure.AssemblyLoad
+{
+    public static class AssemblyLoader
+    {
+        public static bool IsASnapshotAssembly(this Assembly assembly)
+        {
+            return 
+                assembly
+                    .GetTypes()
+                    .Any(
+                        o => o.BaseType == typeof(ModelSnapshot)
+                    );
+        }
+    }
+}

src/6.0/Siren.Tool/Program.cs

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Reflection;
+using Siren.Domain;
 using Siren.Infrastructure.AssemblyLoad;
 using Siren.Infrastructure.Io;
 using Siren.Infrastructure.Mermaid;
@@ -27,22 +28,42 @@
     throw new Exception("Output path argument invalid");
 
 Assembly assembly;
+var isASnapshotAssembly = false;
 
 try
 {
     assembly =
         Assembly
             .LoadFrom(assemblyPath);
+
+    isASnapshotAssembly = 
+        assembly
+            .IsASnapshotAssembly();
 }
 catch (FileNotFoundException)
 {
     throw new Exception($"Could not load assembly from {assemblyPath}");
 }
 
-var universe =
-    // AssemblyScanner
-    SnapshotAssemblyScanner
-        .Perform(assembly);
+Universe universe;
+
+if (isASnapshotAssembly) {
+    Console
+        .WriteLine("ModelSnapshot type found in assembly... scanning...");
+
+    universe =
+        SnapshotAssemblyScanner
+            .Perform(assembly);
+}
+else
+{
+    Console
+        .WriteLine("POCO default assembly... scanning...");
+
+    universe =
+        PocoAssemblyScanner
+            .Perform(assembly);
+}
 
 var result =
     MermaidRenderer