/// <summary>
/// Initialises a new instance of the <see cref="ParallelSystem{T}"/> class.
/// </summary>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <param name="systems">The <see cref="ISystem{T}"/> instances.</param>
public ParallelSystem(SystemRunner <T> runner, params ISystem <T>[] systems)
: this(null, runner, systems)
{
}
/// <summary>
/// Initialise a new instance of the <see cref="AComponentSystem{TState, TComponent}"/> class with the given <see cref="World"/> and <see cref="SystemRunner{TState}"/>.
/// </summary>
/// <param name="world">The <see cref="World"/> on which to process the update.</param>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <exception cref="ArgumentNullException"><paramref name="world"/> is null.</exception>
protected AComponentSystem(World world, SystemRunner <TState> runner)
: base(runner)
{
_component = ComponentManager <TComponent> .GetOrCreate(world?.WorldId ?? throw new ArgumentNullException(nameof(world)));
}
/// <summary>
/// Initialises a new instance of the <see cref="ParallelSystem{T}"/> class.
/// </summary>
/// <param name="mainSystem">The <see cref="ISystem{T}"/> instance to be updated on the calling thread.</param>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <param name="systems">The <see cref="ISystem{T}"/> instances.</param>
public ParallelSystem(ISystem <T> mainSystem, SystemRunner <T> runner, params ISystem <T>[] systems)
: base(runner)
{
_mainSystem = mainSystem;
_systems = systems ?? EmptyArray <ISystem <T> > .Value;
}
/// <summary>
/// Initialises a new instance of the <see cref="ParallelSystem{T}"/> class.
/// </summary>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <param name="systems">The <see cref="ISystem{T}"/> instances.</param>
public ParallelSystem(SystemRunner <T> runner, params ISystem <T>[] systems)
: this(null, runner, systems as IEnumerable <ISystem <T> >)
{
}
/// <summary>
/// Initialises a new instance of the <see cref="ParallelSystem{T}"/> class.
/// </summary>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <param name="systems">The <see cref="ISystem{T}"/> instances.</param>
public ParallelSystem(SystemRunner <T> runner, IEnumerable <ISystem <T> > systems)
: this(null, runner, systems)
{
}
/// <summary>
/// Initialises a new instance of the <see cref="ParallelSystem{T}"/> class.
/// </summary>
/// <param name="mainSystem">The <see cref="ISystem{T}"/> instance to be updated on the calling thread.</param>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <param name="systems">The <see cref="ISystem{T}"/> instances.</param>
public ParallelSystem(ISystem <T> mainSystem, SystemRunner <T> runner, params ISystem <T>[] systems)
: this(mainSystem, runner, systems as IEnumerable <ISystem <T> >)
{
}
/// <summary>
/// Initialises a new instance of the <see cref="ParallelSystem{T}"/> class.
/// </summary>
/// <param name="mainSystem">The <see cref="ISystem{T}"/> instance to be updated on the calling thread.</param>
/// <param name="runner">The <see cref="SystemRunner{T}"/> used to process the update in parallel if not null.</param>
/// <param name="systems">The <see cref="ISystem{T}"/> instances.</param>
public ParallelSystem(ISystem <T> mainSystem, SystemRunner <T> runner, IEnumerable <ISystem <T> > systems)
: base(runner)
{
_mainSystem = mainSystem;
_systems = (systems ?? Enumerable.Empty <ISystem <T> >()).Where(s => s != null).ToArray();
}