/// <summary>
/// Gets the generic factory for a concrete service type.
/// </summary>
/// <param name="serviceInfo">The <see cref="IServiceInfo"/> object that describes the service to be created.</param>
/// <param name="factory">The factory instance that will be used to create the service.</param>
/// <param name="serviceName">The name of the service.</param>
/// <param name="actualServiceType">The service type.</param>
/// <returns>A factory instance that can create the generic type.</returns>
private IFactory GetGenericFactory(IServiceInfo serviceInfo, IFactory factory, string serviceName,
Type actualServiceType)
{
var info = new ServiceInfo(serviceName, actualServiceType, serviceInfo.ArgumentTypes);
if (base.ContainsFactory(info))
{
IFactory actualFactory = base.GetFactory(info);
Func<IFactoryRequest, object> factoryMethod = request => actualFactory;
factory = new FunctorFactory<IFactory>(factoryMethod);
}
return factory;
}
/// <summary>
/// Obtains the <see cref="IFactory"/> instance that can instantiate the
/// service described by the <paramref name="serviceInfo"/> object instance.
/// </summary>
/// <param name="serviceInfo">The <see cref="IServiceInfo"/> object that describes the service to be created.</param>
/// <returns>A <see cref="IFactory"/> instance if the service can be instantiated; otherwise, it will return <c>false</c>.</returns>
public override IFactory GetFactory(IServiceInfo serviceInfo)
{
// Attempt to create the service type using
// the strongly-typed arguments
var factory = base.GetFactory(serviceInfo);
var serviceType = serviceInfo.ServiceType;
var serviceName = serviceInfo.ServiceName;
// Use the default factory for this service type if no other factory exists
var defaultServiceInfo = new ServiceInfo(serviceInfo.ServiceName, serviceInfo.ServiceType);
if (factory == null && base.ContainsFactory(defaultServiceInfo))
factory = base.GetFactory(defaultServiceInfo);
// Attempt to create the service type using
// the generic factories, if possible
if (factory != null || !serviceType.IsGenericType)
return factory;
var definitionType = serviceType.GetGenericTypeDefinition();
var genericServiceInfo = new ServiceInfo(serviceName, definitionType, serviceInfo.ArgumentTypes);
if (base.ContainsFactory(genericServiceInfo))
return base.GetFactory(genericServiceInfo);
if (definitionType != typeof(IFactory<>))
return factory;
var typeArguments = serviceType.GetGenericArguments();
var actualServiceType = typeArguments[0];
var info = new ServiceInfo(serviceName, actualServiceType, serviceInfo.ArgumentTypes);
if (base.ContainsFactory(info))
{
var actualFactory = base.GetFactory(info);
Func<IFactoryRequest, object> factoryMethod = request => actualFactory;
factory = new FunctorFactory<IFactory>(factoryMethod);
}
return factory;
}
