/// <summary>
/// Resolve an object of type.
/// </summary>
/// <param name="type">Type of object to resolve.</param>
public object Resolve([NotNull] Type type)
{
bool found = TryFindBindings(type, out var foundBindings);
if (!found || foundBindings.Count <= 0)
{
throw new KeyNotFoundException($"Could not find binding for type: {type}");
}
object instance;
bool invalidType = false;
var firstBinding = foundBindings[0];
if (firstBinding.injected)
{
instance = firstBinding.instance;
if (!type.IsInstanceOfType(instance))
{
invalidType = true;
}
}
else
{
instance = CreateNewInstance(firstBinding);
if (type.IsInstanceOfType(instance))
{
//inject
ContainerDatabase.GetInjector(type)?.Invoke(instance, this);
if (firstBinding.scope == Binding.ScopeTypes.Unset)
{
throw new InvalidOperationException($"Undefined Scope for binding of type: {type}");
}
//mark injected if singleton
if (firstBinding.scope == Binding.ScopeTypes.Singleton)
{
firstBinding.instance = instance;
firstBinding.injected = true;
}
}
else
{
invalidType = true;
}
}
if (invalidType)
{
throw new InvalidCastException(
$"Binding for type: {type} has an instance value of type {instance.GetType()}");
}
return(instance);
}
/// <summary>
/// Try and inject an object.
/// </summary>
/// <param name="obj">The object to inject.</param>
/// <returns>Was there an registered injector for the given object.</returns>
public bool TryInject(object obj)
{
var injector = ContainerDatabase.GetInjector(obj.GetType());
if (injector != null)
{
injector.Invoke(obj, this);
return(true);
}
return(false);
}
private object CreateNewInstance(Binding binding)
{
object instance;
if (binding.instance != null)
{
instance = binding.instance;
}
else if (binding.instanceFactory != null)
{
instance = binding.instanceFactory.Invoke(this);
}
else
{
var factory = ContainerDatabase.GetFactory(binding.concreteType);
instance = factory.Invoke(this);
}
return(instance);
}