add datamodificationexception class

src/Microsoft.AspNetCore.OData/DataModificationExceptionType.cs

@@ -0,0 +1,118 @@
+//-----------------------------------------------------------------------------
+// <copyright file="DataModificationExceptionType.cs" company=".NET Foundation">
+//      Copyright (c) .NET Foundation and Contributors. All rights reserved.
+//      See License.txt in the project root for license information.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+
+namespace Org.OData.Core.V1
+{
+    /// <summary>
+    /// Represents a message type.
+    /// </summary>
+    public class MessageType
+    {
+        /// <summary>
+        /// Code of message.
+        /// </summary>
+        public string Code { get; set; }
+
+        /// <summary>
+        /// Actual message.
+        /// </summary>
+        public string Message { get; set; }
+
+        /// <summary>
+        /// Severity of message.
+        /// </summary>
+        public string Severity { get; set; }
+
+        /// <summary>
+        /// Target of message.
+        /// </summary>
+        public string Target { get; set; }
+
+        /// <summary>
+        /// Details of message.
+        /// </summary>
+        public string Details { get; set; }
+    }
+
+    /// <summary>
+    /// Represents an exception type.
+    /// </summary>
+    public abstract class ExceptionType
+    {
+        /// <summary>
+        /// Represents a message type.
+        /// </summary>
+        public MessageType MessageType { get; set; }
+    }
+
+    /// <summary>
+    /// Represents the type of exception thrown during a data modification operation.
+    /// </summary>
+    public class DataModificationExceptionType : ExceptionType
+    {
+        /// <summary>
+        ///  Initializes a new instance of the <see cref="DataModificationExceptionType"/> class.
+        /// </summary>
+        public DataModificationExceptionType(DataModificationOperationKind failedOperation)
+        {
+            this.FailedOperation = failedOperation;
+        }
+
+        /// <summary>
+        /// Represents the kind of data modification operation.
+        /// </summary>
+        public DataModificationOperationKind FailedOperation { get; }
+
+        /// <summary>
+        /// Represents the response code.
+        /// </summary>
+        public Int16 ResponseCode { get; set; }
+    }
+
+    /// <summary>
+    /// Enumerates the kind of data modification operations.
+    /// </summary>
+    public enum DataModificationOperationKind
+    {
+        /// <summary>
+        /// Represents an insert operation.
+        /// </summary>
+        Insert,
+
+        /// <summary>
+        /// Represents an update operation.
+        /// </summary>
+        Update,
+
+        /// <summary>
+        /// Represents an insert or update operation if item already exists.
+        /// </summary>
+        Upsert,
+
+        /// <summary>
+        /// Represents a delete data modification operation.
+        /// </summary>
+        Delete,
+
+        /// <summary>
+        /// Represents an action or function invocation.
+        /// </summary>
+        Invoke,
+
+        /// <summary>
+        /// Represents adding a link between entities.
+        /// </summary>
+        Link,
+
+        /// <summary>
+        /// Represents removing a link between entities.
+        /// </summary>
+        Unlink
+    }
+}

src/Microsoft.AspNetCore.OData/Deltas/Delta.cs

@@ -21,6 +21,9 @@ public abstract class Delta : DynamicObject, IDelta
         /// </summary>
         public abstract DeltaItemKind Kind { get; }
 
+        /// <inheritdoc/>
+        public IODataInstanceAnnotationContainer TransientInstanceAnnotationContainer { get; set; }
+
         /// <summary>
         /// Clears the Delta and resets the underlying Entity.
         /// </summary>

src/Microsoft.AspNetCore.OData/Deltas/DeltaLinkBaseOfT.cs

@@ -68,5 +68,8 @@ protected DeltaLinkBase(Type structuralType)
         /// The name of the relationship property on the parent object.
         /// </summary>
         public string Relationship { get; set; }
+
+        /// <inheritdoc/>
+        public IODataInstanceAnnotationContainer TransientInstanceAnnotationContainer { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
     }
 }

src/Microsoft.AspNetCore.OData/Deltas/IDeltaSetItem.cs

@@ -16,5 +16,10 @@ public interface IDeltaSetItem
         /// Gets the delta item kind.
         /// </summary>
         DeltaItemKind Kind { get; }
+
+        /// <summary>
+        /// Gets or sets the annotation container to hold transient instance annotations.
+        /// </summary>
+        IODataInstanceAnnotationContainer TransientInstanceAnnotationContainer { get; set; }
     }
 }

src/Microsoft.AspNetCore.OData/IODataInstanceAnnotationContainer.cs

@@ -0,0 +1,61 @@
+//-----------------------------------------------------------------------------
+// <copyright file="IODataInstanceAnnotationContainer.cs" company=".NET Foundation">
+//      Copyright (c) .NET Foundation and Contributors. All rights reserved. 
+//      See License.txt in the project root for license information.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System.Collections.Generic;
+
+namespace Microsoft.AspNetCore.OData
+{
+    /// <summary>
+    /// Identifies a container for holding instance annotations. A default implementation is provided.
+    /// Customers can have their own implementation.
+    /// </summary>
+    public interface IODataInstanceAnnotationContainer
+    {
+        /// <summary>
+        /// Method to Add an Instance Annotation to the CLR type
+        /// </summary>
+        /// <param name="annotationName">Name of Annotation</param>
+        /// <param name="value">Value of Annotation</param>
+        void AddResourceAnnotation(string annotationName, object value);
+
+        /// <summary>
+        /// Method to Add an Instance Annotation to a property
+        /// </summary>
+        /// <param name="propertyName">Name of the property</param>
+        /// <param name="annotationName">Name of Annotation</param>
+        /// <param name="value">Value of Annotation</param>
+        void AddPropertyAnnotation(string propertyName, string annotationName, object value);
+
+        /// <summary>
+        /// Get an Instance Annotation from CLR Type
+        /// </summary>
+        /// <param name="annotationName">Name of Annotation</param>
+        /// <returns>Get Annotation value for the given annotation</returns>
+        object GetResourceAnnotation(string annotationName);
+
+        /// <summary>
+        /// Get an Instance Annotation from the Property
+        /// </summary>
+        /// <param name="propertyName">Name of the Property</param>
+        /// <param name="annotationName">Name of the Annotation</param>
+        /// <returns>Get Annotation value for the given annotation and property</returns>
+        object GetPropertyAnnotation(string propertyName, string annotationName);
+
+        /// <summary>
+        /// Get All Annotations from CLR Type
+        /// </summary>
+        /// <returns>Dictionary of string(annotation name) and object value(annotation value)</returns>
+        IDictionary<string, object> GetResourceAnnotations();
+
+        /// <summary>
+        /// Get all Annotations for a Property
+        /// </summary>
+        /// <param name="propertyName">Name of Property</param>
+        /// <returns>Dictionary of string(annotation name) and object value(annotation value)</returns>
+        IDictionary<string, object> GetPropertyAnnotations(string propertyName);
+    }
+}