public object Cast(IComponent component, Type targetType)
{
Guard.NotNull(() => component, component);
Guard.NotNull(() => targetType, targetType);
if (!targetType.IsInterface)
throw new ArgumentException(Strings.SmartCast.InterfaceRequired);
if (component.Schema == null)
throw new ArgumentException(Strings.SmartCast.SchemaRequired(component));
var propertyName = "$" + targetType.AssemblyQualifiedName;
// NOTE: we cache the proxy instance for performance.
var proxyProperty = component.Properties.FirstOrDefault(p => p.Name == propertyName);
if (proxyProperty == null)
{
var containerSchema = component.Schema as IContainerInfo;
if (containerSchema != null)
{
if (!IsCompatibleContainer(containerSchema, targetType))
return null;
}
else if (!IsCompatibleComponent(component.Schema, targetType))
{
return null;
}
proxyProperty = component.CreateProperty(propertyName);
// Try to expose the most specific interface of the received component.
var componentType = component is IProduct ? typeof(IProduct) :
(component is IElement ? typeof(IElement) :
(component is ICollection ? typeof(ICollection) : typeof(IComponent)));
proxyProperty.Value = generator.CreateInterfaceProxyWithTarget(
componentType, new[] { targetType }, component, new Interceptor(component, Behaviors.Default));
}
return proxyProperty.Value;
}