private void BuildBaseContainer()
{
_serviceMap = _dependencyContainer.GetServiceMap();
var map = new DependencyMap();
foreach (var dependency in _serviceMap.Keys)
{
map.AddService(dependency, _serviceMap[dependency]);
}
_baseContainer = map.CreateContainer();
}
/// <summary>
/// Attempts to get an instance of the given <paramref name="serviceType"/>.
/// </summary>
/// <param name="serviceType">The service type.</param>
/// <param name="key">The service name.</param>
/// <returns>An object instance that matches the given service type. This method will return null if that service isn't available.</returns>
public object GetInstance(Type serviceType, string key)
{
if (!Contains(serviceType, key))
{
return(null);
}
// Compile the container that will be used
// to satisfy the dependencies for the service type
if (_baseContainer == null)
{
BuildBaseContainer();
}
// Use the existing container, if possible
if (!_containerMap.ContainsKey(serviceType))
{
// Create a new container that constructs the service type
// and redirects all other calls to the base container
var map = new DependencyMap();
var availableDependencies = _serviceMap.Keys;
foreach (var dependency in availableDependencies)
{
// The base container will handle all the other dependencies
map.AddDeferredService(dependency.ServiceName, dependency.ServiceType);
}
// Add the service type itself
var arguments = serviceType.GetGenericArguments();
var concreteType = _genericTypeImplementation.MakeGenericType(arguments);
Register(serviceType, concreteType, map);
// Compile the container
var container = map.CreateContainer();
// Defer the other calls to the base container
container.NextContainer = _baseContainer;
_containerMap[serviceType] = container;
}
var result = _containerMap[serviceType].GetInstance(serviceType, key);
if (result == null && NextContainer != this && NextContainer != null)
{
return(NextContainer.GetInstance(serviceType, key));
}
return(result);
}