DeleteItemDocumentOperationRequest implementation

wip

wip

implement sync update method and unit tests

PutItemOperationRequest

integration tests

Author: irina-herciu

generator/.DevConfigs/9490947f-209f-47e9-8c70-3698872df304.json

@@ -0,0 +1,11 @@
+{
+  "services": [
+    {
+      "serviceName": "DynamoDBv2",
+      "type": "minor",
+      "changeLogMessages": [
+        "Add Request Object Pattern and Expression-Based for DynamoDB Document Model "
+      ]
+    }
+  ]
+}

sdk/src/Services/DynamoDBv2/Custom/DataModel/DocumentOperationRequest.cs

@@ -0,0 +1,87 @@
+using System.Collections.Generic;
+
+namespace Amazon.DynamoDBv2.DocumentModel
+{
+    /// <summary>
+    /// Base class for requests that perform operations on a document in DynamoDB. 
+    /// </summary>
+    public abstract class DocumentOperationRequest
+    {
+    }
+
+    /// <summary>
+    /// Represents a request to update an item in a DynamoDB table using the Document Model.
+    /// </summary>
+    public class UpdateItemDocumentOperationRequest : DocumentOperationRequest
+    {
+        /// <summary>
+        /// Gets or sets the key identifying the item in the table.
+        /// </summary>
+        public IDictionary<string, DynamoDBEntry> Key { get; set; }
+
+        /// <summary>
+        /// Gets or sets the attributes to be updated in the item.
+        /// </summary>
+        public Document Document { get; set; }
+
+        /// <summary>
+        /// Gets or sets the update expression specifying how attributes should be updated.
+        /// </summary>
+        public Expression UpdateExpression { get; set; }
+
+        /// <summary>
+        /// The expression that is evaluated before the update is performed. If the expression evaluates to false the update
+        /// will fail and a ConditionalCheckFailedException exception will be thrown.
+        /// </summary>
+        public Expression ConditionalExpression { get; set; }
+
+        /// <summary>
+        /// Flag specifying what values should be returned.
+        /// </summary>
+        public ReturnValues ReturnValues { get; set; }
+    }
+
+    /// <summary>
+    /// Represents a request to delete an item from a DynamoDB table using the Document Model.
+    /// </summary>
+    public class DeleteItemDocumentOperationRequest : DocumentOperationRequest
+    {
+        /// <summary>
+        /// Gets or sets the key identifying the item in the table.
+        /// </summary>
+        public IDictionary<string, DynamoDBEntry> Key { get; set; }
+
+        /// <summary>
+        /// Gets or sets the conditional expression specifying when the item should be deleted.
+        /// </summary>
+        public Expression ConditionalExpression { get; set; }
+
+        /// <summary>
+        /// Flag specifying what values should be returned.
+        /// </summary>
+        public ReturnValues ReturnValues { get; set; }
+
+    }
+
+    /// <summary>
+    /// Represents a request to put (create or replace) an item in a DynamoDB table using the Document Model.
+    /// </summary>
+    public class PutItemDocumentOperationRequest : DocumentOperationRequest
+    {
+        /// <summary>
+        /// Gets or sets the document to be put in the table.
+        /// </summary>
+        public Document Document { get; set; }
+
+        /// <summary>
+        /// Gets or sets the conditional expression specifying when the item should be put.
+        /// </summary>
+        public Expression ConditionalExpression { get; set; }
+
+        /// <summary>
+        /// Flag specifying what values should be returned.
+        /// </summary>
+        public ReturnValues ReturnValues { get; set; }
+    }
+
+}

sdk/src/Services/DynamoDBv2/Custom/DocumentModel/DocumentOperationRequest.cs

@@ -127,6 +127,41 @@ internal void ApplyExpression(UpdateItemRequest request, Table table)
             }
         }
 
+        internal void ApplyConditionalExpression(UpdateItemRequest request, Table table)
+        {
+            request.ConditionExpression = this.ExpressionStatement;
+            MergeAttributes(request, table);
+        }
+
+        internal void ApplyUpdateExpression(UpdateItemRequest request, Table table)
+        {
+            request.UpdateExpression = this.ExpressionStatement;
+            MergeAttributes(request, table);
+        }
+
+        private void MergeAttributes(UpdateItemRequest request, Table table)
+        {
+            var convertToAttributeValues  = ConvertToAttributeValues(this.ExpressionAttributeValues, table);
+            request.ExpressionAttributeValues ??= new Dictionary<string, AttributeValue>(StringComparer.Ordinal);
+            foreach (var kvp in convertToAttributeValues)
+            {
+                request.ExpressionAttributeValues[kvp.Key] = kvp.Value;
+            }
+
+
+            if (this.ExpressionAttributeNames?.Count > 0)
+            {
+                request.ExpressionAttributeNames ??= new Dictionary<string, string>(StringComparer.Ordinal);
+                foreach (var kvp in this.ExpressionAttributeNames)
+                {
+                    if (!request.ExpressionAttributeNames.ContainsKey(kvp.Key))
+                    {
+                        request.ExpressionAttributeNames[kvp.Key] = kvp.Value;
+                    }
+                }
+            }
+        }
+
         internal void ApplyExpression(Get request, Table table)
         {
             request.ProjectionExpression = ExpressionStatement;