fix: Use the ILambdaSerializer to serialize the response body when returning an IHttpResult and generate documentation comments for public members

Libraries/src/Amazon.Lambda.Annotations.SourceGenerator/Generator.cs

@@ -356,7 +356,6 @@ private bool HasSerializerAttribute(GeneratorExecutionContext context, IMethodSy
         private LambdaSerializerInfo GetSerializerInfoAttribute(GeneratorExecutionContext context, IMethodSymbol methodModel)
         {
             var serializerString = DEFAULT_LAMBDA_SERIALIZER;
-            string serializerJsonContext = null;
 
             ISymbol symbol = null;
 
@@ -377,24 +376,19 @@ private LambdaSerializerInfo GetSerializerInfoAttribute(GeneratorExecutionContex
             // Else return the default serializer.
             else
             {
-                return new LambdaSerializerInfo(serializerString, serializerJsonContext);
+                return new LambdaSerializerInfo(serializerString);
             }
 
             var attribute = symbol.GetAttributes().FirstOrDefault(attr => attr.AttributeClass.Name == TypeFullNames.LambdaSerializerAttributeWithoutNamespace);
 
             var serializerValue = attribute.ConstructorArguments.FirstOrDefault(kvp => kvp.Type.Name == nameof(Type)).Value;
 
-            if(serializerValue is INamedTypeSymbol typeSymbol && typeSymbol.Name.Contains("SourceGeneratorLambdaJsonSerializer") && typeSymbol.TypeArguments.Length == 1)
-            {
-                serializerJsonContext = typeSymbol.TypeArguments[0].ToString();
-            }
-
             if (serializerValue != null)
             {
                 serializerString = serializerValue.ToString();
             }
 
-            return new LambdaSerializerInfo(serializerString, serializerJsonContext);
+            return new LambdaSerializerInfo(serializerString);
         }
 
         public void Initialize(GeneratorInitializationContext context)

Libraries/src/Amazon.Lambda.Annotations.SourceGenerator/Models/GeneratedMethodModelBuilder.cs

@@ -148,7 +148,8 @@ private static IList<ParameterModel> BuildParameters(IMethodSymbol lambdaMethodS
                 Type = new TypeModel
                 {
                     FullName = TypeFullNames.ILambdaContext
-                }
+                },
+                Documentation = "The ILambdaContext that provides methods for logging and describing the Lambda environment."
             };
 
             if (lambdaMethodSymbol.HasAttribute(context, TypeFullNames.RestApiAttribute))
@@ -158,7 +159,8 @@ private static IList<ParameterModel> BuildParameters(IMethodSymbol lambdaMethodS
                 var requestParameter = new ParameterModel
                 {
                     Name = "__request__",
-                    Type = type
+                    Type = type,
+                    Documentation = "The API Gateway request object that will be processed by the Lambda function handler."
                 };
                 parameters.Add(requestParameter);
                 parameters.Add(contextParameter);
@@ -188,7 +190,8 @@ private static IList<ParameterModel> BuildParameters(IMethodSymbol lambdaMethodS
                 var requestParameter = new ParameterModel
                 {
                     Name = "__request__",
-                    Type = type
+                    Type = type,
+                    Documentation = "The API Gateway request object that will be processed by the Lambda function handler."
                 };
                 parameters.Add(requestParameter);
                 parameters.Add(contextParameter);
@@ -208,6 +211,11 @@ private static IList<ParameterModel> BuildParameters(IMethodSymbol lambdaMethodS
                     else if(param.Type.FullName == TypeFullNames.ILambdaContext)
                     {
                         param.Name = "__context__";
+                        param.Documentation = "The ILambdaContext that provides methods for logging and describing the Lambda environment.";
+                    }
+                    else
+                    {
+                        param.Documentation = "The request object that will be processed by the Lambda function handler.";
                     }
 
                     parameters.Add(param);

Libraries/src/Amazon.Lambda.Annotations.SourceGenerator/Models/LambdaFunctionModel.cs

@@ -35,7 +35,7 @@ public class LambdaFunctionModel : ILambdaFunctionSerializable
         /// Gets or sets fully qualified name of the serializer used for serialization or deserialization.
         /// </summary>
         public LambdaSerializerInfo SerializerInfo { get; set; } =
-            new LambdaSerializerInfo("Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer", null);
+            new LambdaSerializerInfo("Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer");
 
         /// <summary>
         /// Gets or sets if the output is an executable.

Libraries/src/Amazon.Lambda.Annotations.SourceGenerator/Models/LambdaSerializerInfo.cs

@@ -14,20 +14,14 @@ public class LambdaSerializerInfo
         /// </summary>
         /// <param name="serializerName"></param>
         /// <param name="serializerJsonContextName"></param>
-        public LambdaSerializerInfo(string serializerName, string serializerJsonContextName)
+        public LambdaSerializerInfo(string serializerName)
         {
             SerializerName = serializerName;
-            SerializerJsonContextName = serializerJsonContextName;
         }
 
         /// <summary>
         /// The full name of the type registered as the ILambdaSerializer.
         /// </summary>
         public string SerializerName { get; }
-
-        /// <summary>
-        /// The full name of the type used as the generic parameter of the SourceGeneratorLambdaJsonSerializer.
-        /// </summary>
-        public string SerializerJsonContextName { get; }   
     }
 }

Libraries/src/Amazon.Lambda.Annotations.SourceGenerator/Models/ParameterModel.cs

@@ -23,5 +23,10 @@ public class ParameterModel
         /// an empty list.
         /// </summary>
         public IList<AttributeModel> Attributes { get; set; } = new List<AttributeModel>();
+
+        /// <summary>
+        /// Gets or sets the documentation of parameter.
+        /// </summary>
+        public string Documentation { get; set; }
     }
 }