From ce9a103dd2d695f2f5af9efddb0d33932c84af25 Mon Sep 17 00:00:00 2001
From: Liam Pace <146035497+liampace@users.noreply.github.com>
Date: Thu, 18 Sep 2025 02:11:57 -0400
Subject: [PATCH] Implement javac handler

---
 .../javac/handlers/HandleJacksonized.java     | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/core/lombok/javac/handlers/HandleJacksonized.java b/src/core/lombok/javac/handlers/HandleJacksonized.java
index 61400559..6a43abe4 100644
--- a/src/core/lombok/javac/handlers/HandleJacksonized.java
+++ b/src/core/lombok/javac/handlers/HandleJacksonized.java
@@ -118,10 +118,12 @@ public class HandleJacksonized extends JavacAnnotationHandler<Jacksonized> {
 			return;
 		}
 		
-		// Add @JsonProperty to all fields. It will be automatically copied to the getter/setters later.
+		// Add @JsonProperty to all non-transient fields. It will be automatically copied to the getter/setters later.
+		// Add @JsonIgnore to all transient fields. It will be automatically copied to the getter/setters later.
 		for (JavacNode javacNode : tdNode.down()) {
 			if (javacNode.getKind() == Kind.FIELD) {
-				createJsonPropertyForField(javacNode, annotationNode);
+				if (javacNode.isTransient()) createJsonIgnoreForField(javacNode, annotationNode);
+				else createJsonPropertyForField(javacNode, annotationNode);
 			}
 		}
 	}
@@ -139,6 +141,19 @@ public class HandleJacksonized extends JavacAnnotationHandler<Jacksonized> {
 		fieldDecl.mods.annotations = fieldDecl.mods.annotations.append(annotationJsonProperty);
 	}
 	
+	private void createJsonIgnoreForField(JavacNode fieldNode, JavacNode annotationNode) {
+		if (JacksonAnnotations.JSON_IGNORE.isAnnotating(fieldNode)) {
+			return;
+		}
+		JavacTreeMaker maker = fieldNode.getTreeMaker();
+		
+		JCExpression jsonPropertyType = chainDots(fieldNode, JacksonAnnotations.JSON_IGNORE.chainedDots);
+		JCAnnotation annotationJsonProperty = maker.Annotation(jsonPropertyType, List.<JCExpression>nil());
+		recursiveSetGeneratedBy(annotationJsonProperty, annotationNode);
+		JCVariableDecl fieldDecl = ((JCVariableDecl)fieldNode.get());
+		fieldDecl.mods.annotations = fieldDecl.mods.annotations.append(annotationJsonProperty);
+	}
+	
 	private void handleJacksonizedBuilder(JavacNode annotationNode, JavacNode annotatedNode, JavacNode tdNode, JCClassDecl td, JavacNode builderAnnotationNode, JavacNode superBuilderAnnotationNode) {
 		if (builderAnnotationNode != null && superBuilderAnnotationNode != null) {
 			annotationNode.addError("@Jacksonized cannot process both @Builder and @SuperBuilder on the same class.");