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EntryActionBehaviour.cs
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87 lines (72 loc) · 3.02 KB
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using System;
using System.Threading.Tasks;
namespace Stateless
{
public partial class StateMachine<TState, TTrigger>
{
internal abstract class EntryActionBehavior
{
protected EntryActionBehavior(Reflection.InvocationInfo description)
{
Description = description;
}
public Reflection.InvocationInfo Description { get; }
public abstract void Execute(Transition transition, object[] args);
public abstract Task ExecuteAsync(Transition transition, object[] args);
public class Sync : EntryActionBehavior
{
readonly Action<Transition, object[]> _action;
public Sync(Action<Transition, object[]> action, Reflection.InvocationInfo description) : base(description)
{
_action = action;
}
public override void Execute(Transition transition, object[] args)
{
_action(transition, args);
}
public override Task ExecuteAsync(Transition transition, object[] args)
{
Execute(transition, args);
return TaskResult.Done;
}
}
public class SyncFrom<TTriggerType> : Sync
{
internal TTriggerType Trigger { get; private set; }
public SyncFrom(TTriggerType trigger, Action<Transition, object[]> action, Reflection.InvocationInfo description)
: base(action, description)
{
Trigger = trigger;
}
public override void Execute(Transition transition, object[] args)
{
if (transition.Trigger.Equals(Trigger))
base.Execute(transition, args);
}
public override Task ExecuteAsync(Transition transition, object[] args)
{
Execute(transition, args);
return TaskResult.Done;
}
}
public class Async : EntryActionBehavior
{
readonly Func<Transition, object[], Task> _action;
public Async(Func<Transition, object[], Task> action, Reflection.InvocationInfo description) : base(description)
{
_action = action;
}
public override void Execute(Transition transition, object[] args)
{
throw new InvalidOperationException(
$"Cannot execute asynchronous action specified in OnEntry event for '{transition.Destination}' state. " +
"Use asynchronous version of Fire [FireAsync]");
}
public override Task ExecuteAsync(Transition transition, object[] args)
{
return _action(transition, args);
}
}
}
}
}