Address code scanning alerts

Author: MaggieKimani1

src/Microsoft.OpenApi.Readers/ParseNodes/MapNode.cs

@@ -135,7 +135,7 @@ public override Dictionary<string, T> CreateSimpleMap<T>(Func<ValueNode, T> map)
                         JsonValue valueNode = n.Value is JsonValue value ? value 
                         : throw new OpenApiReaderException($"Expected scalar while parsing {typeof(T).Name}", Context);                        
 
-                        return (key, value: map(new ValueNode(Context, (JsonValue)n.Value)));
+                        return (key, value: map(new ValueNode(Context, valueNode)));
                     } finally {
                         Context.EndObject();
                     }

src/Microsoft.OpenApi.Readers/V2/OpenApiV2Deserializer.cs

@@ -48,7 +48,6 @@ private static void ProcessAnyFields<T>(
                 {
                     mapNode.Context.StartObject(anyFieldName);
                     var anyFieldValue = anyFieldMap[anyFieldName].PropertyGetter(domainObject);
-                    var anyFieldSchema = anyFieldMap[anyFieldName].SchemaGetter(domainObject);                    
 
                     if(anyFieldValue == null)
                     {

src/Microsoft.OpenApi.Readers/V3/OpenApiV3Deserializer.cs

@@ -48,7 +48,6 @@ private static void ProcessAnyFields<T>(
                     mapNode.Context.StartObject(anyFieldName);
 
                     var any = anyFieldMap[anyFieldName].PropertyGetter(domainObject);
-                    var schema = anyFieldMap[anyFieldName].SchemaGetter(domainObject);
 
                     if (any == null)
                     {

src/Microsoft.OpenApi/Models/OpenApiRequestBody.cs

@@ -192,7 +192,7 @@ internal OpenApiBodyParameter ConvertToBodyParameter()
             if (bodyParameter.Extensions.ContainsKey(OpenApiConstants.BodyName))
             {
                 var bodyName = bodyParameter.Extensions[OpenApiConstants.BodyName] as OpenApiAny;
-                bodyParameter.Name = string.IsNullOrEmpty(bodyName.Node.ToString()) ? "body" : bodyName.Node.ToString();
+                bodyParameter.Name = string.IsNullOrEmpty(bodyName?.Node.ToString()) ? "body" : bodyName.Node.ToString();
                 bodyParameter.Extensions.Remove(OpenApiConstants.BodyName);
             }
             return bodyParameter;

src/Microsoft.OpenApi/Validations/Rules/RuleHelpers.cs

@@ -86,21 +86,23 @@ public static void ValidateDataTypeMismatch(
                 }
 
                 var anyObject = value as JsonObject;
-
+                
                 foreach (var property in anyObject)
                 {
-                    context.Enter(property.Key);
-
-                    if (schema.Properties != null && schema.Properties.ContainsKey(property.Key))
-                    {
-                        ValidateDataTypeMismatch(context, ruleName, anyObject[property.Key], schema.Properties[property.Key]);
-                    }
-                    else
+                    if (anyObject != null)
                     {
-                        ValidateDataTypeMismatch(context, ruleName, anyObject[property.Key], schema.AdditionalProperties);
-                    }
-
-                    context.Exit();
+                        context.Enter(property.Key);
+                        if (schema.Properties.TryGetValue(property.Key, out var propertyValue))
+                        {
+                            ValidateDataTypeMismatch(context, ruleName, anyObject[property.Key], propertyValue);
+                        }
+                        else
+                        {
+                            ValidateDataTypeMismatch(context, ruleName, anyObject[property.Key], schema.AdditionalProperties);
+                        }
+
+                        context.Exit();
+                    }                    
                 }
 
                 return;

test/Microsoft.OpenApi.Tests/Models/OpenApiDocumentTests.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license. 
 
 using System;