bool CanHandle(ObjectRequestedEventArgs args, out OpenGenericRegistrationData registrationData, out Type[] genericArgs)
{
genericArgs = null;
registrationData = null;
var contractType = args.ContractType;
if (!contractType.IsGenericType)
{
return(false);
}
var openGenericContractType = contractType.GetGenericTypeDefinition();
if (openGenericContractType == null)
{
throw new ImpossibleException();
}
if (!_openContract2OpenConcrete.TryGetValue(openGenericContractType, out registrationData))
{
return(false);
}
// check the generic constraints???
genericArgs = contractType.GetGenericArguments();
return(true);
}
bool HandleObjectBuilderRequest(ObjectRequestedEventArgs args)
{
ObjectBuilderRequested.Invoke(args);
if (!args.Handled)
{
return(false);
}
args.CommitRegistrations();
return(true);
}
public void OnObjectRequested(ObjectRequestedEventArgs args)
{
Type[] genericArgs;
OpenGenericRegistrationData registrationData;
if (!CanHandle(args, out registrationData, out genericArgs))
{
return;
}
RegisterNewService(args, registrationData, genericArgs);
}
bool TryGetCore(Type contract, IInjectionTargetInfo targetInfo, out ObjectBuilderGroup group, out List <ObjectBuilder> builders)
{
var key = GetKey(contract);
_operationLock.EnterReadLock();
try
{
if (_key2Groups.TryGetValue(key, out group))
{
builders = targetInfo != null
? group.GetAllValid(targetInfo)
: group.GetAllValid();
if (builders != null)
{
return(true);
}
}
}
finally
{
_operationLock.ExitReadLock();
}
var args = new ObjectRequestedEventArgs(_kernel, contract, targetInfo);
if (!HandleObjectBuilderRequest(args))
{
builders = null;
return(false);
}
_operationLock.EnterReadLock();
try
{
if (group == null && !_key2Groups.TryGetValue(key, out group))
{
builders = null;
return(false);
}
builders = targetInfo != null
? group.GetAllValid(targetInfo)
: group.GetAllValid();
return(builders != null);
}
finally
{
_operationLock.ExitReadLock();
}
}
ObjectBuilderState TryGetCore(Type contract, IInjectionTargetInfo targetInfo, out ObjectBuilderGroup group, out ObjectBuilder builder)
{
var result = ObjectBuilderState.Unregistered;
var key = GetKey(contract);
_operationLock.EnterReadLock();
try
{
if (_key2Groups.TryGetValue(key, out group))
{
result = targetInfo != null
? group.TryGetFirstValid(targetInfo, out builder)
: group.TryGetFirstValid(out builder);
if (result == ObjectBuilderState.Normal)
{
return(result);
}
}
}
finally
{
_operationLock.ExitReadLock();
}
var args = new ObjectRequestedEventArgs(_kernel, contract, targetInfo);
if (!HandleObjectBuilderRequest(args))
{
builder = null;
return(result);
}
_operationLock.EnterReadLock();
try
{
if (group == null && !_key2Groups.TryGetValue(key, out group))
{
builder = null;
return(result);
}
return(targetInfo != null
? group.TryGetFirstValid(targetInfo, out builder)
: group.TryGetFirstValid(out builder));
}
finally
{
_operationLock.ExitReadLock();
}
}
static RegistrationProvider CreateRegistrationProvider(ObjectRequestedEventArgs args, OpenGenericRegistrationData registrationData, Type[] genericArgs)
{
var registrationProviderType =
typeof(ReflectionOrEmitRegistrationProvider <>).MakeGenericType(args.ContractType);
TypedRegistrationProvider provider;
try
{
var objProvider = Activator.CreateInstance(registrationProviderType, args.Kernel);
provider = objProvider as TypedRegistrationProvider;
if (provider == null)
{
throw new ImpossibleException();
}
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
provider.ActivatorKind = registrationData.ActivatorKind;
provider.ContractType = registrationData.OpenGenericContractType.MakeGenericType(genericArgs);
provider.ConcreteType = registrationData.OpenGenericConcreteType.MakeGenericType(genericArgs);
if (registrationData.ConstructorSelector != null)
{
provider.ConstructorSelector = registrationData.ConstructorSelector;
}
if (registrationData.ConfiguredParameters != null)
{
provider.ConfiguredParameters = registrationData.ConfiguredParameters;
}
if (registrationData.LifetimeProvider != null)
{
provider.LifetimeProvider = registrationData.LifetimeProvider;
}
return(provider);
}
static void RegisterNewService(ObjectRequestedEventArgs args, OpenGenericRegistrationData registrationData, Type[] genericArgs)
{
var provider = CreateRegistrationProvider(args, registrationData, genericArgs);
args.Register(provider);
}
