/// <summary>
/// Resolves the <see cref="SqlProjectionHandler">handlers</see> that match the type of the message exactly.
/// </summary>
/// <param name="handlers">The set of resolvable handlers.</param>
/// <returns>A <see cref="SqlProjectionHandlerResolver">resolver</see>.</returns>
public static SqlProjectionHandlerResolver WhenEqualToHandlerMessageType(SqlProjectionHandler[] handlers)
{
if (handlers == null)
throw new ArgumentNullException("handlers");
var cache = handlers.
GroupBy(handler => handler.Message).
ToDictionary(@group => @group.Key, @group => @group.ToArray());
return message =>
{
if(message == null)
throw new ArgumentNullException("message");
SqlProjectionHandler[] result;
return cache.TryGetValue(message.GetType(), out result) ?
result :
new SqlProjectionHandler[0];
};
}
