/// <summary>
/// Emits the instructions that will instantiate the current implementation using the given factory functor.
/// </summary>
/// <param name="dependency">The dependency that describes the service to be instantiated.</param>
/// <param name="serviceMap">The service map that contains the list of dependencies in the application.</param>
/// <param name="targetMethod">The target method.</param>
public void Emit(IDependency dependency,
IDictionary <IDependency, IImplementation> serviceMap,
MethodDefinition targetMethod)
{
var declaringType = targetMethod.DeclaringType;
var module = declaringType.Module;
var serviceType = module.Import(_serviceType);
var createInstanceMethod = typeof(FunctorRegistry).GetMethod("CreateInstance");
var createInstance = module.Import(createInstanceMethod);
// Register the functor
FunctorRegistry.AddFunctor(_functorId, _functor);
var body = targetMethod.Body;
var IL = body.GetILProcessor();
// Instantiate the instance at runtime using the
// given functor associated with the functor id
IL.Emit(OpCodes.Ldstr, _functorId);
IL.Emit(OpCodes.Ldarg_0);
IL.Emit(OpCodes.Call, createInstance);
if (serviceType.IsValueType)
{
return;
}
IL.Emit(OpCodes.Castclass, serviceType);
}
internal void RegisterFunctor()
{
FunctorRegistry.AddFunctor(_functorId, _functor);
}