Created
October 24, 2022 19:05
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An EcsSystems derived class capable of querying
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| #nullable enable | |
| using Leopotam.EcsLite; | |
| using System; | |
| using System.Text; | |
| namespace Systems | |
| { | |
| internal static partial class ExtensionMethods | |
| { | |
| // Code originally written by Brian Rogers in StackOverflow | |
| // Source: https://stackoverflow.com/questions/17480990/ | |
| internal static string TypeName(this Type type) | |
| { | |
| if (!type.IsGenericType) | |
| { | |
| return type.Name; | |
| } | |
| StringBuilder sb = new StringBuilder(); | |
| sb.Append(type.Name).Append('<'); | |
| bool appendComma = false; | |
| foreach (Type t in type.GetGenericArguments()) | |
| { | |
| sb.Append(appendComma ? "," : "").Append(TypeName(t)); | |
| appendComma = true; | |
| } | |
| sb.Append('>'); | |
| return sb.ToString(); | |
| } | |
| } | |
| internal class QueryableEcsSystems : EcsSystems | |
| { | |
| public QueryableEcsSystems(EcsWorld defaultWorld, object shared = null) : base(defaultWorld, shared) { } | |
| public override IEcsSystems Add(IEcsSystem system) | |
| { | |
| string key = system.GetType().TypeName(); | |
| IEcsSystem? s = GetAllSystems().Find(value => value.GetType().TypeName() == key); | |
| #if DEBUG && !LEOECSLITE_NO_SANITIZE_CHECKS | |
| if (s != null) { throw new System.Exception("System already exists in the current context."); } | |
| #endif | |
| return base.Add(system); | |
| } | |
| public T? GetSystem<T>() where T : IEcsSystem | |
| { | |
| string key = typeof(T).TypeName(); | |
| IEcsSystem? system = GetAllSystems().Find(value => value.GetType().TypeName() == key); | |
| #if DEBUG && !LEOECSLITE_NO_SANITIZE_CHECKS | |
| if (system == null) { throw new System.Exception("System does not exist in the current context."); } | |
| #endif | |
| return (T?)system; | |
| } | |
| } | |
| } |
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