working with PostSharp/IoC stuff

MonoStockPortfolio.Core/PortfolioRepositories/AndroidSqlitePortfolioRepository.cs

@@ -16,11 +16,6 @@ namespace MonoStockPortfolio.Core.PortfolioRepositories
         private const int DATABASE_VERSION = 1;
         private const string POSITION_TABLE_NAME = "Positions";
 
-        public AndroidSqlitePortfolioRepository(SQLiteDatabase db)
-        {
-            _db = db;
-        }
-
         public AndroidSqlitePortfolioRepository(Context context)
         {
             _dbHelper = new OpenHelper(context, DATABASE_NAME, null, DATABASE_VERSION);

MonoStockPortfolio/IoCAttribute.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using Android.Content;
+using MonoStockPortfolio.Core.PortfolioRepositories;
+using MonoStockPortfolio.Core.Services;
+using PostSharp.Aspects;
+
+namespace MonoStockPortfolio
+{
+    public class IoCAttribute : LocationInterceptionAspect
+    {
+        private static Context _context;
+
+        public override void OnGetValue(LocationInterceptionArgs args)
+        {
+            if(_context != null) _context = (Context)args.Instance;
+
+            var locationType = args.Location.LocationType;
+            var instantiation = GetInstance(locationType);
+            if(instantiation != null)
+            {
+                args.SetNewValue(instantiation);
+            }
+            args.ProceedGetValue();
+        }
+
+        private static object GetInstance(Type locationType)
+        {
+            if (DependencyMap.ContainsKey(locationType))
+            {
+                return DependencyMap[locationType]();
+            }
+            return null;
+        }
+
+        private static IDictionary<Type, Func<object>> DependencyMap
+        {
+            get { return _dependencyMap ?? (_dependencyMap = DefaultDependencies()); }
+        }
+
+        private static IDictionary<Type, Func<object>> _dependencyMap;
+        private static IDictionary<Type, Func<object>> DefaultDependencies()
+        {
+            var map = new Dictionary<Type, Func<object>>();
+            map.Add(typeof(IPortfolioService), () => new PortfolioService(_context));
+            map.Add(typeof(IPortfolioRepository), () => new AndroidSqlitePortfolioRepository(_context));
+            return map;
+        }
+
+        public void LoadDependencies(IDictionary<Type, Func<object>> dependencies)
+        {
+            _dependencyMap = dependencies;
+        }
+    }
+}

MonoStockPortfolio/MainActivity.cs

@@ -16,18 +16,16 @@ namespace MonoStockPortfolio
     {
         public static string ClassName { get { return "monostockportfolio.MainActivity"; } }
 
-        private IPortfolioService _svc;
+        [IoC] private IPortfolioService _svc;
+        [IoC] private IPortfolioRepository _repo;
+
         private IList<Portfolio> _portfolios;
         private string[] _longClickOptions;
-        private IPortfolioRepository _repo;
 
         protected override void OnCreate(Bundle bundle)
         {
             base.OnCreate(bundle);
 
-            _svc = new PortfolioService(this);
-            _repo = new AndroidSqlitePortfolioRepository(this);
-
             SetContentView(Resource.layout.main);
 
             RefreshList();
@@ -67,7 +65,6 @@ namespace MonoStockPortfolio
 
         private void tr_LongClick_Options(object sender, DialogClickEventArgs e, Portfolio selectedPortfolio)
         {
-            //Toast.MakeText(this, "Option: " + _longClickOptions[e.Which], ToastLength.Long).Show();
             if(_longClickOptions[e.Which] == "Edit")
             {
                 // Edit

MonoStockPortfolio/MonoStockPortfolio.csproj

@@ -38,6 +38,10 @@
   <ItemGroup>
     <Reference Include="Mono.Android" />
     <Reference Include="mscorlib" />
+    <Reference Include="PostSharp.SL, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b13fd38b8f9c99d7, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\libs\PostSharp.SL.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Xml.Linq" />
@@ -45,6 +49,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="EditPortfolioActivity.cs" />
+    <Compile Include="IoCAttribute.cs" />
     <Compile Include="PortfolioActivity.cs" />
     <Compile Include="MainActivity.cs" />
     <Compile Include="AddPositionActivity.cs" />
@@ -54,6 +59,9 @@
     <Compile Include="Validation\FormValidator.cs" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="PostSharp.Custom.targets">
+      <SubType>Designer</SubType>
+    </None>
     <None Include="Resources\AboutResources.txt" />
   </ItemGroup>
   <ItemGroup>

MonoStockPortfolio/PostSharp.Custom.targets

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <PropertyGroup>
+        <PostSharpAssemblyBindingPolicySet>Silverlight20</PostSharpAssemblyBindingPolicySet>
+    </PropertyGroup>
+</Project>