| public EnterResolutionContext ( IHandler handlerBeingResolved, bool requiresDecommission ) : ResolutionContext | ||
| handlerBeingResolved | IHandler | |
| requiresDecommission | bool | |
| Résultat | ResolutionContext | |
protected override object ResolveCore(CreationContext context, bool track, bool instanceRequired)
{
Type implType;
try
{
implType = ComponentModel.Implementation.MakeGenericType(context.GenericArguments);
}
catch (ArgumentException)
{
// may throw in some cases when impl has generic constraints that service hasn't
if(instanceRequired)
{
throw;
}
return null;
}
var handler = GetSubHandler(context, implType);
// so the generic version wouldn't be considered as well
using(context.EnterResolutionContext(this, false))
{
return handler.Resolve(context);
}
}
protected override object ResolveCore(CreationContext context, bool track, bool instanceRequired)
{
Type implType = ComponentModel.Implementation.MakeGenericType(context.GenericArguments);
IHandler handler = GetSubHandler(context, implType);
// so the generic version wouldn't be considered as well
using(context.EnterResolutionContext(this, false))
{
return handler.Resolve(context);
}
}
/// <summary>
/// Returns an instance of the component this handler
/// is responsible for
/// </summary>
/// <param name="context"></param>
/// <param name="requiresDecommission"></param>
/// <param name="instanceRequired"></param>
/// <returns></returns>
protected override object ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired)
{
if (CanResolvePendingDependencies(context) == false)
{
if (instanceRequired == false)
{
return null;
}
AssertNotWaitingForDependency();
}
using (var resolutionContext = context.EnterResolutionContext(this,HasDecomission(requiresDecommission)))
{
var instance = lifestyleManager.Resolve(context, resolutionContext.Burden, context.ReleasePolicy);
return instance;
}
}
/// <summary>
/// Returns an instance of the component this handler
/// is responsible for
/// </summary>
/// <param name="context"></param>
/// <param name="requiresDecommission"></param>
/// <param name="instanceRequired"></param>
/// <returns></returns>
protected override object ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired)
{
if (ResolveImpossible(context))
{
if (instanceRequired == false)
{
return null;
}
AssertNotWaitingForDependency();
}
using (var resolutionContext = context.EnterResolutionContext(this))
{
var instance = lifestyleManager.Resolve(context);
resolutionContext.Burden.SetRootInstance(instance, this, HasDecomission(requiresDecommission));
context.ReleasePolicy.Track(instance, resolutionContext.Burden);
return instance;
}
}
protected override object Resolve(CreationContext context, bool instanceRequired)
{
var implType = GetClosedImplementationType(context, instanceRequired);
if (implType == null)
{
Debug.Assert(instanceRequired == false, "instanceRequired == false");
return null;
}
var handler = GetSubHandler(context, implType);
// so the generic version wouldn't be considered as well
using (context.EnterResolutionContext(this, false, false))
{
try
{
return handler.Resolve(context);
}
catch (GenericHandlerTypeMismatchException e)
{
throw new HandlerException(
string.Format(
"Generic component {0} has some generic dependencies which were not successfully closed. This often happens when generic implementation has some additional generic constraints. See inner exception for more details.",
ComponentModel.Name), ComponentModel.ComponentName, e);
}
}
}
protected override object Resolve(CreationContext context, bool instanceRequired)
{
var implType = GetClosedImplementationType(context, instanceRequired);
if (implType == null)
{
Debug.Assert(instanceRequired == false, "instanceRequired == false");
return null;
}
var handler = GetSubHandler(context, implType);
// so the generic version wouldn't be considered as well
using (context.EnterResolutionContext(this, false, false))
{
return handler.Resolve(context);
}
}
/// <summary>
/// Returns an instance of the component this handler
/// is responsible for
/// </summary>
/// <param name = "context"> </param>
/// <param name = "requiresDecommission"> </param>
/// <param name = "instanceRequired"> </param>
/// <param name = "burden"> </param>
/// <returns> </returns>
protected object ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired, out Burden burden)
{
if (IsBeingResolvedInContext(context))
{
var cache = lifestyleManager as IContextLifestyleManager;
if (cache != null)
{
var instance = cache.GetContextInstance(context);
if (instance != null)
{
burden = null;
return instance;
}
}
if (instanceRequired == false)
{
burden = null;
return null;
}
var message = new StringBuilder();
message.AppendFormat("Dependency cycle has been detected when trying to resolve component '{0}'.",
ComponentModel.Name);
message.AppendLine();
message.AppendLine("The resolution tree that resulted in the cycle is the following:");
context.BuildCycleMessageFor(this, message);
throw new CircularDependencyException(message.ToString(), ComponentModel);
}
if (CanResolvePendingDependencies(context) == false)
{
if (instanceRequired == false)
{
burden = null;
return null;
}
AssertNotWaitingForDependency();
}
try
{
using (var ctx = context.EnterResolutionContext(this, requiresDecommission))
{
var instance = lifestyleManager.Resolve(context, context.ReleasePolicy);
burden = ctx.Burden;
return instance;
}
}
catch (NoResolvableConstructorFoundException)
{
throw UnresolvableHandlerException();
}
}
/// <summary>
/// Returns an instance of the component this handler
/// is responsible for
/// </summary>
/// <param name = "context"></param>
/// <param name = "requiresDecommission"></param>
/// <param name = "instanceRequired"></param>
/// <param name = "burden"></param>
/// <returns></returns>
protected object ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired, out Burden burden)
{
if (CanResolvePendingDependencies(context) == false)
{
if (instanceRequired == false)
{
burden = null;
return null;
}
AssertNotWaitingForDependency();
}
using (var ctx = context.EnterResolutionContext(this, requiresDecommission))
{
var instance = lifestyleManager.Resolve(context, context.ReleasePolicy);
burden = ctx.Burden;
return instance;
}
}
protected override object ResolveCore(CreationContext context, bool requiresDecommission, bool instanceRequired)
{
Type implType;
try
{
// TODO: what if ComponentModel.Implementation is a LateBoundComponent?
implType = ComponentModel.Implementation.MakeGenericType(context.GenericArguments);
}
catch (ArgumentException e)
{
// may throw in some cases when impl has generic constraints that service hasn't
if (instanceRequired == false)
{
return null;
}
// ok, let's do some investigation now what might have been the cause of the error
var arguments = ComponentModel.Implementation.GetGenericArguments();
if (arguments.Length > context.GenericArguments.Length)
{
var message =
string.Format(
"Requested type {0} has {1} generic parameter(s), whereas component implementation type {2} requires {3}. This means that Windsor does not have enough information to properly create that component for you. This is most likely a bug in your registration code.",
context.RequestedType, context.GenericArguments.Length, ComponentModel.Implementation, arguments.Length);
throw new HandlerException(message, e);
}
// we have correct number of generic arguments, that means probably some generic constraing was violated.
// the CLR exception should suffice
throw;
}
var handler = GetSubHandler(context, implType);
// so the generic version wouldn't be considered as well
using (context.EnterResolutionContext(this, false))
{
return handler.Resolve(context);
}
}