Added file comments

src/Hydrogen/Collections/StreamMapped/StreamMappedFactory.cs

@@ -466,16 +466,7 @@ out KeyChecksumIndex<KeyValuePair<TKey, TValue>, TKey> keyChecksumKeyIndex
 		container.RegisterAttachment(recyclableIndexIndex);
 
 		// Create key checksum index (for fast key lookups)
-		keyChecksummer ??= new ItemDigestor<TKey>(keySerializer, container.StreamContainer.Endianness);
-		keyChecksumKeyIndex = new KeyChecksumIndex<KeyValuePair<TKey, TValue>, TKey>(
-			container,
-			keyChecksumIndexStreamIndex,
-			kvp => kvp.Key,
-			keyChecksummer,
-			ReadKey,
-			keyComparer
-		);
-		container.RegisterAttachment(keyChecksumKeyIndex);
+		keyChecksumKeyIndex = container.AddChecksumKeyIndex(kvp => kvp.Key, keyChecksummer, keySerializer, ReadKey, keyComparer, keyChecksumIndexStreamIndex);
 
 		return container;
 

src/Hydrogen/ObjectSpaces/Attributes/UniquePropertyAttribute.cs

@@ -1,4 +1,12 @@
-using System;
+// Copyright (c) Sphere 10 Software. All rights reserved. (https://sphere10.com)
+// Author: Herman Schoenfeld
+//
+// Distributed under the MIT software license, see the accompanying file
+// LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
+//
+// This notice must not be removed when duplicating this file or its contents, in whole or in part.
+
+using System;
 using System.Collections.Generic;
 using System.Text;
 

src/Hydrogen/ObjectSpaces/Container/IObjectContainerAttachment.cs

@@ -1,4 +1,12 @@
-namespace Hydrogen.ObjectSpaces;
+// Copyright (c) Sphere 10 Software. All rights reserved. (https://sphere10.com)
+// Author: Herman Schoenfeld
+//
+// Distributed under the MIT software license, see the accompanying file
+// LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
+//
+// This notice must not be removed when duplicating this file or its contents, in whole or in part.
+
+namespace Hydrogen.ObjectSpaces;
 
 public interface IObjectContainerAttachment {
 	ObjectContainer Container { get; } 

src/Hydrogen/ObjectSpaces/Container/ObjectContainer.cs

@@ -221,6 +221,7 @@ internal T GetAttachment<T>(long reservedStream) where T : IObjectContainerAttac
 		return (T)_attachments[reservedStream];
 	}
 
+
 	#endregion
 
 	#region Event Notification

src/Hydrogen/ObjectSpaces/Container/ObjectContainerAttachmentBase.cs

@@ -1,4 +1,12 @@
-using System;
+// Copyright (c) Sphere 10 Software. All rights reserved. (https://sphere10.com)
+// Author: Herman Schoenfeld
+//
+// Distributed under the MIT software license, see the accompanying file
+// LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
+//
+// This notice must not be removed when duplicating this file or its contents, in whole or in part.
+
+using System;
 using System.IO;
 using System.Runtime.CompilerServices;
 

src/Hydrogen/ObjectSpaces/Container/ObjectContainerT.cs

@@ -7,7 +7,9 @@
 // This notice must not be removed when duplicating this file or its contents, in whole or in part.
 
 
+using System;
 using System.Collections.Generic;
+using static Hydrogen.AMS;
 
 namespace Hydrogen.ObjectSpaces;
 
@@ -35,4 +37,22 @@ internal ClusteredStream SaveItemAndReturnStream(long index, T item, ObjectConta
 		item = (T)obj;
 		return result;
 	}
+
+	internal KeyChecksumIndex<T, TKey> AddChecksumKeyIndex<TKey>(Func<T, TKey> projection, long streamIndex, IItemSerializer<TKey> keySerializer = null, IItemChecksummer<TKey> keyChecksummer= null, Func<long, TKey> keyFetcher= null, IEqualityComparer<TKey> keyComparer= null) {
+		keyChecksummer ??= new ItemDigestor<TKey>(keySerializer, StreamContainer.Endianness);
+		keyFetcher ??= x => projection(LoadItem(x));
+		var keyChecksumKeyIndex = new KeyChecksumIndex<T, TKey>(
+			this,
+			streamIndex,
+			projection,
+			keyChecksummer,
+			keyFetcher,
+			keyComparer
+		);
+		RegisterAttachment(keyChecksumKeyIndex);
+
+		return keyChecksumKeyIndex;
+	}
+
+
 }

src/Hydrogen/ObjectSpaces/Definitions/ObjectSpaceDefinition.cs

@@ -1,4 +1,12 @@
-using System;
+// Copyright (c) Sphere 10 Software. All rights reserved. (https://sphere10.com)
+// Author: Herman Schoenfeld
+//
+// Distributed under the MIT software license, see the accompanying file
+// LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
+//
+// This notice must not be removed when duplicating this file or its contents, in whole or in part.
+
+using System;
 using Hydrogen.Mapping;
 
 namespace Hydrogen.ObjectSpaces;

src/Hydrogen/ObjectSpaces/Definitions/ObjectSpaceFile.cs

@@ -1,4 +1,12 @@
-namespace Hydrogen.ObjectSpaces;
+// Copyright (c) Sphere 10 Software. All rights reserved. (https://sphere10.com)
+// Author: Herman Schoenfeld
+//
+// Distributed under the MIT software license, see the accompanying file
+// LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
+//
+// This notice must not be removed when duplicating this file or its contents, in whole or in part.
+
+namespace Hydrogen.ObjectSpaces;
 
 public class ObjectSpaceFile {
 	public string FilePath { get; set; }

src/Hydrogen/ObjectSpaces/ObjectSpace.cs

@@ -1,4 +1,12 @@
-using System;
+// Copyright (c) Sphere 10 Software. All rights reserved. (https://sphere10.com)
+// Author: Herman Schoenfeld
+//
+// Distributed under the MIT software license, see the accompanying file
+// LICENSE or visit http://www.opensource.org/licenses/mit-license.php.
+//
+// This notice must not be removed when duplicating this file or its contents, in whole or in part.
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
@@ -157,15 +165,16 @@ IObjectContainerAttachment BuildUniqueKey(ObjectContainer container, ObjectSpace
 		}
 
 		IObjectContainerAttachment BuildIndex(ObjectContainer container, ObjectSpaceDefinition.ContainerDefinition containerDefinition, ObjectSpaceDefinition.IndexDefinition indexDefinition, int streamIndex) {
-			var dataProviderType = typeof(KeyIndex<,>).MakeGenericType(containerDefinition.ObjectType, indexDefinition.KeyMember.PropertyType);
+			var dataProviderType = typeof(KeyChecksumIndex<,>).MakeGenericType(containerDefinition.ObjectType, indexDefinition.KeyMember.PropertyType);
 			//var projectionType = typeof(Func<,>).MakeGenericType(containerDefinition.ObjectType, indexDefinition.KeyMember.PropertyType);
 			var projection = Tools.Lambda.ConvertFunc(indexDefinition.KeyMember.GetValue, containerDefinition.ObjectType, indexDefinition.KeyMember.PropertyType);
 			var keyComparer = _comparerFactory.GetEqualityComparer(indexDefinition.KeyMember.PropertyType);
 			var serializer = _serializerFactory.GetSerializer(indexDefinition.KeyMember.PropertyType);
 
 			// public ObjectContainerUniqueKey(ObjectContainer container, long reservedStreamIndex, Func<TItem, TKey> projection, IEqualityComparer<TKey> keyComparer, IItemSerializer<TKey> keySerializer) {
 			try {
-				var uniqueKeyInstance = dataProviderType.ActivateWithCompatibleArgs(container, (long)streamIndex, projection, keyComparer, serializer);
+				//obj
+				var uniqueKeyInstance = dataProviderType.ActivateWithCompatibleArgs(container, (long)streamIndex, projection, null, null, keyComparer); // keyFetcher and keyChecksummer are null as method will auto-create
 				return (IObjectContainerAttachment)uniqueKeyInstance;
 			} catch (Exception ex) {
 				var xxx = ex.ToDiagnosticString();