add all

Packages/com.tivadar.best.http/Runtime/Shared/Database/IndexingService.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+
+namespace Best.HTTP.Shared.Databases
+{
+    public abstract class IndexingService<ContentType, MetadataType> where MetadataType : Metadata
+    {
+        /// <summary>
+        /// Index newly added metadata
+        /// </summary>
+        public virtual void Index(MetadataType metadata) { }
+
+        /// <summary>
+        /// Remove metadata from all indexes.
+        /// </summary>
+        public virtual void Remove(MetadataType metadata) { }
+
+        /// <summary>
+        /// Clear all indexes
+        /// </summary>
+        public virtual void Clear() { }
+
+        /// <summary>
+        /// Get indexes in an optimized order. This is usually one of the indexes' WalkHorizontal() call.
+        /// </summary>
+        public virtual IEnumerable<int> GetOptimizedIndexes() => null;
+    }
+}