internal static InstanceEntityHookFactory From <TRequest, TEntity>(
IEntityHook <TRequest, TEntity> hook)
where TEntity : class
{
return(new InstanceEntityHookFactory(
hook,
new FunctionEntityHook((request, entity, ct)
=> hook.Run((TRequest)request, (TEntity)entity, ct))));
}
/// <summary>
/// Adds an entity hook instance.
/// </summary>
public TBuilder AddEntityHook(IEntityHook hook)
{
var hookType = hook.GetType();
var baseHookType = hookType
.GetBaseTypes()
.SingleOrDefault(x =>
x.IsGenericType && x.GetGenericTypeDefinition() == typeof(EntityHook <,>));
if (baseHookType == null)
{
throw new ArgumentException($"Unable to add '{hookType}' as an entity hook for '{typeof(TRequest)}'.\r\n" +
$"Entity hooks must inherit EntityHook<TRequest, TEntity>.");
}
var requestType = baseHookType.GenericTypeArguments[0];
if (!requestType.IsAssignableFrom(typeof(TRequest)))
{
throw new ContravarianceException(nameof(AddEntityHook), requestType, typeof(TRequest));
}
var entityType = baseHookType.GenericTypeArguments[1];
if (!entityType.IsAssignableFrom(typeof(TEntity)))
{
throw new ContravarianceException(nameof(AddEntityHook), entityType, typeof(TEntity));
}
var factoryMethod = typeof(InstanceEntityHookFactory)
.GetMethod(nameof(InstanceEntityHookFactory.From), BindingFlags.NonPublic | BindingFlags.Static)
.MakeGenericMethod(requestType, entityType);
try
{
return(AddEntityHook((IEntityHookFactory)factoryMethod.Invoke(null, new object[] { hook })));
}
catch (TargetInvocationException e)
{
if (e.InnerException != null)
{
throw e.InnerException;
}
throw e;
}
}
public TBuilder AddEntityHook <TBaseRequest, TBaseEntity>(IEntityHook <TBaseRequest, TBaseEntity> hook)
where TBaseEntity : class
{
if (!typeof(TBaseRequest).IsAssignableFrom(typeof(TRequest)))
{
throw new ContravarianceException(nameof(FilterWith), typeof(TBaseRequest), typeof(TRequest));
}
if (!typeof(TBaseEntity).IsAssignableFrom(typeof(TEntity)))
{
throw new ContravarianceException(nameof(FilterWith), typeof(TBaseEntity), typeof(TEntity));
}
EntityHooks.Add(InstanceEntityHookFactory.From(hook));
return((TBuilder)this);
}