GH-10058: Add Jackson 3 (de)serializer support

Related to: #10058

* Add Jackson3-compatible messaging (de)serializers
* Add Jackson 3 `messagingAwareMapper()` support
* Maintain existing Jackson 2 functionality
* Revert class naming to maintain compatibility
* Keep existing `*JacksonDeserializer` classes unchanged
* Add new `*Jackson3Deserializer` classes for Jackson 3 support
* Remove `Jackson3` suffix from deserializer/serializer classes
* Copy `DEFAULT_TRUSTED_PACKAGES` from `JacksonJsonUtils` for future deprecation
* Inline dedicated method and constants in test
* Configure checkstyle `NoWhitespaceBefore` tokens to allow varargs spacing
* Add `@Nullable` for JSpecify nullability
* Fix ClassLoader reference in `JacksonMessagingUtils`
* Add missing `@Nullable` for varargs param

Signed-off-by: Jooyoung Pyoung <[email protected]>

Author: anthologia

spring-integration-core/src/main/java/org/springframework/integration/support/json/AdviceMessageJsonDeserializer.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2025-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.support.json;
+
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.DeserializationContext;
+import tools.jackson.databind.JsonNode;
+
+import org.springframework.integration.message.AdviceMessage;
+import org.springframework.integration.support.MutableMessageHeaders;
+import org.springframework.messaging.Message;
+
+/**
+ * The {@link MessageJsonDeserializer} implementation for the {@link AdviceMessage}.
+ *
+ * @author Jooyoung Pyoung
+ *
+ * @since 7.0
+ */
+public class AdviceMessageJsonDeserializer extends MessageJsonDeserializer<AdviceMessage<?>> {
+
+	@SuppressWarnings("unchecked")
+	public AdviceMessageJsonDeserializer() {
+		super((Class<AdviceMessage<?>>) (Class<?>) AdviceMessage.class);
+	}
+
+	@Override
+	protected AdviceMessage<?> buildMessage(MutableMessageHeaders headers, Object payload, JsonNode root,
+			DeserializationContext ctxt) throws JacksonException {
+
+		Message<?> inputMessage = getMapper().readValue(root.get("inputMessage").traverse(ctxt), Message.class);
+		return new AdviceMessage<>(payload, headers, inputMessage);
+	}
+
+}

spring-integration-core/src/main/java/org/springframework/integration/support/json/ErrorMessageJsonDeserializer.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2025-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.support.json;
+
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.DeserializationContext;
+import tools.jackson.databind.JsonNode;
+import tools.jackson.databind.type.TypeFactory;
+
+import org.springframework.integration.support.MutableMessageHeaders;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.support.ErrorMessage;
+
+/**
+ * The {@link MessageJsonDeserializer} implementation for the {@link ErrorMessage}.
+ *
+ * @author Jooyoung Pyoung
+ *
+ * @since 7.0
+ */
+public class ErrorMessageJsonDeserializer extends MessageJsonDeserializer<ErrorMessage> {
+
+	@SuppressWarnings("this-escape")
+	public ErrorMessageJsonDeserializer() {
+		super(ErrorMessage.class);
+		setPayloadType(TypeFactory.createDefaultInstance().constructType(Throwable.class));
+	}
+
+	@Override
+	protected ErrorMessage buildMessage(MutableMessageHeaders headers, Object payload, JsonNode root,
+			DeserializationContext ctxt) throws JacksonException {
+
+		Message<?> originalMessage = getMapper().readValue(root.get("originalMessage").traverse(ctxt), Message.class);
+		return new ErrorMessage((Throwable) payload, headers, originalMessage);
+	}
+
+}

spring-integration-core/src/main/java/org/springframework/integration/support/json/GenericMessageJsonDeserializer.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2025-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.support.json;
+
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.DeserializationContext;
+import tools.jackson.databind.JsonNode;
+
+import org.springframework.integration.support.MutableMessageHeaders;
+import org.springframework.messaging.support.GenericMessage;
+
+/**
+ * The {@link MessageJsonDeserializer} implementation for the {@link GenericMessage}.
+ *
+ * @author Jooyoung Pyoung
+ *
+ * @since 7.0
+ */
+public class GenericMessageJsonDeserializer extends MessageJsonDeserializer<GenericMessage<?>> {
+
+	@SuppressWarnings("unchecked")
+	public GenericMessageJsonDeserializer() {
+		super((Class<GenericMessage<?>>) (Class<?>) GenericMessage.class);
+	}
+
+	@Override
+	protected GenericMessage<?> buildMessage(MutableMessageHeaders headers, Object payload, JsonNode root,
+			DeserializationContext ctxt) throws JacksonException {
+
+		return new GenericMessage<>(payload, headers);
+	}
+
+}