From df9c90afd49488d5bfef035609dd608fa065b3d5 Mon Sep 17 00:00:00 2001
From: smilkuri <smilkuri@amazon.com>
Date: Fri, 11 Jul 2025 15:22:51 +0000
Subject: [PATCH] convert empty structure payloads to null

---
 .../codegen/integration/HttpBindingProtocolGenerator.java | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/HttpBindingProtocolGenerator.java b/smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/HttpBindingProtocolGenerator.java
index d38dff08145..8aa98cdb0e5 100644
--- a/smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/HttpBindingProtocolGenerator.java
+++ b/smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/HttpBindingProtocolGenerator.java
@@ -2486,6 +2486,14 @@ private HttpBinding readPayload(
                         Location.PAYLOAD, "data", binding.getMember(), target));
                 }
             );
+        } else if (target instanceof StructureShape) {
+            writer.write("contents.$L = $L;", binding.getMemberName(), getOutputValue(context,
+                Location.PAYLOAD, "data", binding.getMember(), target));
+            // Handle empty objects for structure shapes - convert to null
+            writer.write("if (contents.$L && Object.keys(contents.$L).length === 0) {",
+                binding.getMemberName(), binding.getMemberName());
+            writer.write("  contents.$L = null;", binding.getMemberName());
+            writer.write("}");
         } else {
             writer.write("contents.$L = $L;", binding.getMemberName(), getOutputValue(context,
                 Location.PAYLOAD, "data", binding.getMember(), target));