public object Resolve(TypeKey type)
{
if (_optimizationCallCache.ContainsKey(type))
return _optimizationCallCache[type]();
_typesCallResolveStack = new HashSet<TypeKey>();
SetupPerRequest(type);
_recorder.Start();
var newObj = ResolveType(type);
var exp = _recorder.Result();
if (exp != null)
{
Func<object> method;
if (_binder.IsSingleton(type))
method = () => (newObj);
else
method = (Func<object>)exp.Compile();
_optimizationCallCache.Add(type, method);
}
return newObj;
}
private void SetupPerRequest(TypeKey type)
{
_requestObjectBag = new Dictionary<TypeKey, object>();
_perRequest = false;
if (!_binder.IsConfigured(type))
return;
var config = _binder.Configuration[type];
if (config.ActivationType == ActivationType.PerRequest || config.ActivationType == ActivationType.Singleton)
_perRequest = true;
}
private object ResolveType(TypeKey type)
{
var newObject = ResolveCustomHandler(type);
if (newObject != null)
return newObject;
newObject = ResolvePerRequestObject(type);
if (newObject != null)
return newObject;
newObject = _binder.IsConfigured(type) ? ResolveConfiguredType(type) : ResolveUnConfiguredType(type);
ResolveCustomInitialization(type, newObject);
AddPerRequestObject(type, newObject);
return newObject;
}
private object ResolveCustomHandler(TypeKey targetType)
{
if (_sigletonBag.ContainsKey(targetType))
return _sigletonBag[targetType];
var newObj = _binder.CustomResolve(targetType.Type);
if (newObj.Value != null)
{
_recorder.CustomResolve(newObj.Key, newObj.Value, _binder, targetType.Type);
ActivatePerRequest();
if (_binder.IsSingleton(targetType))
_sigletonBag.Add(targetType, newObj.Value);
ResolveCustomInitialization(targetType, newObj.Value);
}
return newObj.Value;
}
private void ResolveCustomInitialization(TypeKey targetType, object newObj)
{
var initialization = _binder.GetInitializeObjectWith(targetType);
if (initialization != null)
_recorder.InitializeObjectWith(initialization, newObj);
}
private void AddPerRequestObject(TypeKey type, object newObject)
{
if (_perRequest)
{
_requestObjectBag.Add(type, newObject);
}
}
private object ResolveConfiguredType(TypeKey type)
{
object newObject = null;
if (_typesCallResolveStack.Contains(type))
throw new CircularDependencyException();
_typesCallResolveStack.Add(type);
var config = _binder.Configuration[type];
switch (config.ConstructorType)
{
case ConstructorType.NoArguments:
newObject = _recorder.ActivatorCreateInstance(config.Target,
_binder.IsSingleton(new TypeKey(config.Source)));
break;
case ConstructorType.Default:
case ConstructorType.WithCustom:
newObject = CreateObjectWithConstructor(config);
break;
default:
throw new ArgumentOutOfRangeException();
}
AddIfSingleton(newObject, config);
_typesCallResolveStack.Remove(type);
return newObject;
}
private object ResolveUnConfiguredType(TypeKey type)
{
object newObject = null;
//TODO: detect if exists multiple defaults
if (type.Type.GetConstructors()
.Where(c =>
c.GetCustomAttributes(false).Length >0
).Where(
c =>
c.GetCustomAttributes(false)[0]
.GetType()
.Equals(typeof(DefaultConstructorAttribute)))
.Count() > 1)
throw new MultipleDefaultConstructorAttributesException();
if (type.Type.GetConstructor(new Type[] { }) != null)
{
newObject = _recorder.ActivatorCreateInstance(type.Type, _binder.IsSingleton(type));
}
if(type.Type.GetConstructors().Length == 0)
throw new UnboundTypeException();
//TODO: change this
var newConfig = new TypeConfiguration(type.Type, type.Type);
newConfig.Constructor = type.Type.GetConstructors()[0];
newConfig.ConstructorType = ConstructorType.WithCustom;
_binder.Configuration.Add(type, newConfig);
newObject = ResolveConfiguredType(type);
return newObject;
}
private object ResolvePerRequestObject(TypeKey type)
{
if (_perRequest && _requestObjectBag.ContainsKey(type))
return _requestObjectBag[type];
return null;
}
public bool Equals(TypeKey other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Equals(other._type, _type) && Equals(other._attributeType, _attributeType);
}