private Type GetDecoratorTypeFromDecoratorFactory(Type requestedServiceType,
DecoratorPredicateContext context)
{
Type decoratorType = this.data.DecoratorTypeFactory(context);
if (decoratorType.Info().ContainsGenericParameters)
{
if (!requestedServiceType.Info().IsGenericType)
{
throw new ActivationException(
StringResources.TheDecoratorReturnedFromTheFactoryShouldNotBeOpenGeneric(
requestedServiceType, decoratorType));
}
Requires.TypeFactoryReturnedTypeThatDoesNotContainUnresolvableTypeArguments(
requestedServiceType, decoratorType);
var builder = new GenericTypeBuilder(requestedServiceType, decoratorType);
decoratorType = builder.BuildClosedGenericImplementation().ClosedGenericImplementation;
// decoratorType == null when type constraints don't match.
if (decoratorType != null)
{
Requires.HasFactoryCreatedDecorator(this.data.Container, requestedServiceType, decoratorType);
}
}
else
{
Requires.FactoryReturnsATypeThatIsAssignableFromServiceType(requestedServiceType, decoratorType);
}
return(decoratorType);
}
protected DecoratorPredicateContext CreatePredicateContext(
Type registeredServiceType, Expression expression, ServiceTypeDecoratorInfo info)
{
// NOTE: registeredServiceType can be different from registeredProducer.ServiceType.
// This is the case for container-uncontrolled collections where producer.ServiceType is the
// IEnumerable<T> and registeredServiceType is T.
return(DecoratorPredicateContext.CreateFromInfo(registeredServiceType, expression, info));
}
private static bool DecorateWhenHasValidator(DecoratorPredicateContext c, Container container)
{
var metadata = container.GetInstance <HandlerMetadataService>();
var handlerType = c?.ImplementationType;
return(handlerType != null && metadata.HasValidator(handlerType));
}
protected DecoratorPredicateContext CreatePredicateContext(InstanceProducer registeredProducer,
Type registeredServiceType, Expression expression, Lifestyle lifestyle)
{
var info = this.GetServiceTypeInfo(expression, registeredProducer, registeredServiceType, lifestyle);
// NOTE: registeredServiceType can be different from registeredProducer.ServiceType.
// This is the case for container uncontrolled collections where producer.ServiceType is the
// IEnumerable<T> and registeredServiceType is T.
return(DecoratorPredicateContext.CreateFromInfo(registeredServiceType, expression, info));
}
private static Type ValidatorFactory(DecoratorPredicateContext c)
{
var tRequestHandler = c.ImplementationType
.GetInterfaces()
.Single(x => x.IsGenericType && (
x.GetGenericTypeDefinition() == typeof(IRequestHandler <>) ||
x.GetGenericTypeDefinition() == typeof(IRequestHandler <,>)));
var handlerArguments = tRequestHandler.GetGenericArguments();
var tRequest = handlerArguments[0];
ValidateAttribute FindAttribute(Type t)
{
var attr = t.GetCustomAttribute <ValidateAttribute>(false);
if (attr == null && t.BaseType != null)
{
attr = FindAttribute(t.BaseType);
}
if (attr == null)
{
foreach (var x in t.GetInterfaces())
{
attr = FindAttribute(x);
if (attr != null)
{
return(attr);
}
}
}
return(attr);
}
var validateAttribute = FindAttribute(tRequest);
var tValidator = validateAttribute?.ValidatorType ??
typeof(IRequestValidator <>).MakeGenericType(tRequest);
if (handlerArguments.Length == 1)
{
return(typeof(CrudValidateDecorator <,>).MakeGenericType(tRequest, tValidator));
}
if (handlerArguments.Length == 2)
{
var tResult = handlerArguments[1];
return(typeof(CrudValidateDecorator <, ,>).MakeGenericType(tRequest, tResult, tValidator));
}
return(null);
}
private DecoratorPredicateContext DecorateContext(DecoratorPredicateContext predicateContext)
{
// CreateRegistration must only be called once per decorated item in the collection, but this is
// guaranteed by BuildDecoratorExpression, which simply locks the decoration of the complete
// collection.
var registration = this.CreateRegistration(this.registeredServiceType, this.decoratorConstructor,
predicateContext.Expression);
var producer = new InstanceProducer(this.registeredServiceType, registration);
var decoratedExpression = registration.BuildExpression();
return(predicateContext.Decorate(this.decoratorType, decoratedExpression, producer));
}
protected bool SatisfiesPredicate(DecoratorPredicateContext context)
{
return(this.Predicate == null || this.Predicate(context));
}
protected bool SatisfiesPredicate(DecoratorPredicateContext context) => this.Predicate == null || this.Predicate(context);
private Type GetDecoratorTypeFromDecoratorFactory(Type requestedServiceType,
DecoratorPredicateContext context)
{
Type decoratorType = this.data.DecoratorTypeFactory(context);
if (decoratorType.ContainsGenericParameters)
{
if (!requestedServiceType.IsGenericType)
{
throw new ActivationException(
StringResources.TheDecoratorReturnedFromTheFactoryShouldNotBeOpenGeneric(
requestedServiceType, decoratorType));
}
Requires.TypeFactoryReturnedTypeThatDoesNotContainUnresolvableTypeArguments(
requestedServiceType, decoratorType);
var builder = new GenericTypeBuilder(requestedServiceType, decoratorType);
decoratorType = builder.BuildClosedGenericImplementation().ClosedGenericImplementation;
// decoratorType == null when type constraints don't match.
if (decoratorType != null)
{
Requires.HasFactoryCreatedDecorator(this.data.Container, requestedServiceType, decoratorType);
}
}
else
{
Requires.DecoratorFactoryReturnsATypeThatIsAssignableFromServiceType(decoratorType, requestedServiceType);
}
return decoratorType;
}
protected bool SatisfiesPredicate(DecoratorPredicateContext context) =>
this.Predicate == null || this.Predicate(context);
private static bool DecorateByQueryType(DecoratorPredicateContext context, Type type)
{
return(context.ServiceType.GetGenericArguments()[0].GetInterfaces().Any(i =>
i.IsGenericType &&
i.GetGenericTypeDefinition() == type));
}
public static DecoratorConditionalContext ToConditionalContext(this DecoratorPredicateContext context) => new DecoratorConditionalContext(context.ServiceType, context.ImplementationType, context.AppliedDecorators);
