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JNFrame2/Assets/JNGame/EntitasExtend/JNLookup.cs

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+using System;
+using System.Collections.Generic;
+using Entitas;
+using JNGame.Util.Types;
+
+namespace JNGame.EntitasExtend
+{
+    public abstract class JNLookup
+    {
+        
+        private int _index = 0;
+        
+        public int Count => _index + 1;
+
+        public int Next()
+        {
+            return _index++;
+        }
+
+
+        private readonly KeyValue<int, Type> _types = new();
+
+        public JNLookup()
+        {
+            BindIndex();
+            BindType(_types);
+        }
+
+        protected abstract void BindIndex();
+        protected abstract void BindType(KeyValue<int, Type> types);
+        
+        //查询下标
+        public int GetIndex(Type type)
+        {
+            return _types.Value2Key(type);
+        }
+        //查询下标
+        public int GetIndex<T>()
+        {
+            return _types.Value2Key(typeof(T));
+        }
+        
+    }
+}