private ConstructorInfo FindAppropriateConstructor(Type resolvingType)
{
ConstructorInfo[] constructors = resolvingType.GetConstructors();
ConstructorInfo constructorWithLeastArguments = null;
int leastParameters = Int32.MaxValue;
for (int i = 0; i < constructors.Length; i++)
{
ConstructorInfo constructor = constructors[i];
if (AttributeUtils.IsMarked <InjectAttribute>(constructor))
{
return(constructor);
}
int parametersLength = constructor.GetParameters().Length;
if (parametersLength < leastParameters)
{
constructorWithLeastArguments = constructor;
leastParameters = parametersLength;
}
}
if (constructorWithLeastArguments == null)
{
throw new BehaviourInjectException("Can not find constructor for type " + resolvingType.FullName);
}
return(constructorWithLeastArguments);
}
public object AutocomposeDependency(Type resolvingType)
{
CheckAgainstCompositionStack(resolvingType);
_compositionStack.Push(resolvingType);
ConstructorInfo constructor = FindAppropriateConstructor(resolvingType);
ParameterInfo[] parameters = constructor.GetParameters();
object[] arguments = new object[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
ParameterInfo parameter = parameters[i];
Type argumentType = parameter.ParameterType;
object dependency;
if (AttributeUtils.IsMarked <CreateAttribute>(parameter))
{
dependency = AutocomposeDependency(argumentType);
}
else
{
if (!TryResolve(argumentType, out dependency))
{
throw new BehaviourInjectException(String.Format(
"Could not resolve {0} for {2} in context {1}. Probably it's not registered",
argumentType.FullName, _name, resolvingType.FullName));
}
}
arguments[i] = dependency;
}
object result = constructor.Invoke(arguments);
IMemberInjection[] injections = ReflectionCache.GetInjections(resolvingType);
for (int i = 0; i < injections.Length; i++)
{
injections[i].Inject(result, this);
}
_compositionStack.Pop();
return(result);
}