/// <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();
}
}
