Update Jackson Version to 2.18.6 (#587)

* chore: update jackson.version to 2.18.6

* chore: add some gitignore

* chore: update changelog and pom.xml

---------

Co-authored-by: Davide Melfi <dmelfi@amazon.com>

Author: darklight3it

.gitignore

@@ -36,3 +36,5 @@ experimental/aws-lambda-java-profiler/integration_tests/helloworld/bin
 !experimental/aws-lambda-java-profiler/extension/gradle/wrapper/*.jar
 /scratch/
 .vscode
+.kiro
+build

aws-lambda-java-serialization/RELEASE.CHANGELOG.md

@@ -1,3 +1,8 @@
+### March 11, 2026
+`1.3.0`:
+- Update `jackson-databind` dependency from 2.15.4 to 2.18.6
+- Replace deprecated `PropertyNamingStrategy.PascalCaseStrategy` with `PropertyNamingStrategies.UpperCamelCaseStrategy`
+
 ### December 16, 2025
 `1.2.0`:
 - Update `jackson-databind` dependency from 2.14.2 to 2.15.4

aws-lambda-java-serialization/pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.amazonaws</groupId>
     <artifactId>aws-lambda-java-serialization</artifactId>
-    <version>1.2.0</version>
+    <version>1.3.0</version>
     <packaging>jar</packaging>
 
     <name>AWS Lambda Java Runtime Serialization</name>
@@ -32,7 +32,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <relocation.prefix>com.amazonaws.lambda.thirdparty</relocation.prefix>
-        <jackson.version>2.15.4</jackson.version>
+        <jackson.version>2.18.6</jackson.version>
         <gson.version>2.10.1</gson.version>
         <json.version>20231013</json.version>
         <owasp.version>7.3.2</owasp.version>

aws-lambda-java-serialization/src/main/java/com/amazonaws/services/lambda/runtime/serialization/events/LambdaEventSerializers.java

@@ -19,6 +19,7 @@
 import com.amazonaws.services.lambda.runtime.serialization.PojoSerializer;
 import com.amazonaws.services.lambda.runtime.serialization.util.ReflectUtil;
 import com.amazonaws.services.lambda.runtime.serialization.util.SerializeUtil;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.PropertyNamingStrategy;
 import com.amazonaws.services.lambda.runtime.serialization.events.modules.DateModule;
 import com.amazonaws.services.lambda.runtime.serialization.events.modules.DateTimeModule;
@@ -91,7 +92,7 @@ public class LambdaEventSerializers {
             new SimpleEntry<>("com.amazonaws.services.s3.event.S3EventNotification", new S3EventSerializer<>()),
             new SimpleEntry<>("com.amazonaws.services.lambda.runtime.events.models.s3.S3EventNotification", new S3EventSerializer<>()),
             new SimpleEntry<>("com.amazonaws.services.lambda.runtime.events.S3Event", new S3EventSerializer<>()))
-            .collect(Collectors.toMap(SimpleEntry::getKey, SimpleEntry::getValue));
+            .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
 
     /**
      * Maps supported event classes to mixin classes with Jackson annotations.
@@ -153,7 +154,7 @@ public class LambdaEventSerializers {
                     SQSEventMixin.class),
             new SimpleEntry<>("com.amazonaws.services.lambda.runtime.events.SQSEvent$SQSMessage",
                     SQSEventMixin.SQSMessageMixin.class))
-            .collect(Collectors.toMap(SimpleEntry::getKey, SimpleEntry::getValue));
+            .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
 
     /**
      * If mixins are required for inner classes of an event, then those nested classes must be specified here.
@@ -208,19 +209,19 @@ public class LambdaEventSerializers {
             new SimpleEntry<>("com.amazonaws.services.lambda.runtime.events.SQSEvent",
                     Arrays.asList(
                             new NestedClass("com.amazonaws.services.lambda.runtime.events.SQSEvent$SQSMessage"))))
-            .collect(Collectors.toMap(SimpleEntry::getKey, SimpleEntry::getValue));
+            .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
 
     /**
      * If event requires a naming strategy. For example, when someone names the getter method getSNS and the setter
      * method setSns, for some magical reasons, using both mixins and a naming strategy works
      */
     private static final Map<String, PropertyNamingStrategy> NAMING_STRATEGY_MAP = Stream.of(
             new SimpleEntry<>("com.amazonaws.services.lambda.runtime.events.SNSEvent",
-                    new PropertyNamingStrategy.PascalCaseStrategy()),
+                    new PropertyNamingStrategies.UpperCamelCaseStrategy()),
             new SimpleEntry<>("com.amazonaws.services.lambda.runtime.events.ConnectEvent$Queue",
-                    new PropertyNamingStrategy.PascalCaseStrategy())
+                    new PropertyNamingStrategies.UpperCamelCaseStrategy())
             )
-            .collect(Collectors.toMap(SimpleEntry::getKey, SimpleEntry::getValue));
+            .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
 
     /**
      * Returns whether the class name is a Lambda supported event model.