feat: reproduce code based on comment in issue

* FasterXML/jackson-module-kotlin#843 (comment)

Author: arvgord

src/main/java/com/arvgord/SecondObject.java

@@ -3,6 +3,8 @@
 import com.fasterxml.jackson.annotation.JsonAnyGetter;
 import com.fasterxml.jackson.annotation.JsonAnySetter;
 import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
 
 import java.util.LinkedHashMap;
 import java.util.Map;
@@ -13,18 +15,23 @@
 )
 public class SecondObject {
 
+    private final String transactionId;
     @JsonAnySetter
     @JsonAnyGetter
-    private Map<String, Object> data = new LinkedHashMap<>();
-    private String transactionId;
+    private final Map<String, Object>  data;
 
-    public SecondObject() {}
 
-    SecondObject(String transactionId) {
+    @JsonCreator
+    public SecondObject(@JsonProperty("transactionId") String transactionId) {
         this.transactionId = transactionId;
+        this.data = new LinkedHashMap<>();
     }
 
     public String getTransactionId() {
-        return transactionId;
+        return this.transactionId;
+    }
+
+    public Map<String, Object> getData() {
+        return this.data;
     }
 }

src/main/java/com/arvgord/ThirdObject.java

@@ -3,8 +3,9 @@
 import com.fasterxml.jackson.annotation.JsonAnyGetter;
 import com.fasterxml.jackson.annotation.JsonAnySetter;
 import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
 
-import java.util.LinkedHashMap;
 import java.util.Map;
 
 @JsonAutoDetect(
@@ -13,22 +14,26 @@
 )
 public class ThirdObject {
 
+    private final String transactionId;
+    @JsonAnySetter
     @JsonAnyGetter
-    private Map<String, Object> data = new LinkedHashMap<>();
-    private String transactionId;
+    private final Map<String, Object> data;
 
-    ThirdObject() {}
 
-    public ThirdObject(String transactionId) {
+    @JsonCreator
+    public ThirdObject(
+            @JsonProperty("transactionId") String transactionId,
+            @JsonProperty("data") Map<String, Object> data
+    ) {
         this.transactionId = transactionId;
+        this.data = data;
     }
 
-    @JsonAnySetter
-    public void setData(String key, Object value) {
-        this.data.put(key, value);
+    public String getTransactionId() {
+        return this.transactionId;
     }
 
-    public String getTransactionId() {
-        return transactionId;
+    public Map<String, Object> getData() {
+        return this.data;
     }
 }

src/test/java/com/arvgord/JacksonSortingTest.java

@@ -9,7 +9,7 @@ public class JacksonSortingTest {
 
     private final ObjectMapper objectMapper = new ObjectMapper();
 
-    private final String JSON_INPUT_FIRST = """
+    private final String JSON_INPUT = """
         {
             "b": 2,
             "a": 1,
@@ -31,11 +31,11 @@ public class JacksonSortingTest {
         }
     """;
 
-    private final String JSON_INPUT_SECOND_AND_THIRD = """
+    private final String JSON_OUTPUT_SECOND = """
         {
             "transactionId": "test",
-            "b": 2,
             "a": 1,
+            "b": 2,
             "c": [
                 {
                     "id": "3",
@@ -53,28 +53,50 @@ public class JacksonSortingTest {
         }
     """;
 
-    private <T> void testSerializationDeserialization(String jsonInput, Class<T> clazz) throws Exception {
-        T deserializedObject = objectMapper.readValue(jsonInput, clazz);
+    private final String JSON_OUTPUT_THIRD = """
+        {
+            "transactionId": "test",
+            "c": [
+                {
+                    "id": "3",
+                    "value": "c"
+                },
+                {
+                    "id": "1",
+                    "value": "a"
+                },
+                {
+                    "id": "2",
+                    "value": "b"
+                }
+            ],
+            "a": 1,
+            "b": 2
+        }
+    """;
+
+    private <T> void testSerializationDeserialization(String resultOutput, Class<T> clazz) throws Exception {
+        T deserializedObject = objectMapper.readValue(JSON_INPUT, clazz);
         String serializedJson = objectMapper.writeValueAsString(deserializedObject);
 
-        String expectedJson = objectMapper.readTree(jsonInput).toPrettyString();
+        String expectedJson = objectMapper.readTree(resultOutput).toPrettyString();
         String actualJson = objectMapper.readTree(serializedJson).toPrettyString();
 
         assertEquals(expectedJson, actualJson);
     }
 
     @Test
     public void testSerializationAndDeserializationForFirstObject() throws Exception {
-        testSerializationDeserialization(JSON_INPUT_FIRST, FirstObject.class);
+        testSerializationDeserialization(JSON_INPUT, FirstObject.class);
     }
 
     @Test
     public void testSerializationAndDeserializationForSecondObject() throws Exception {
-        testSerializationDeserialization(JSON_INPUT_SECOND_AND_THIRD, SecondObject.class);
+        testSerializationDeserialization(JSON_OUTPUT_SECOND, SecondObject.class);
     }
 
     @Test
     public void testSerializationAndDeserializationForThirdObject() throws Exception {
-        testSerializationDeserialization(JSON_INPUT_SECOND_AND_THIRD, ThirdObject.class);
+        testSerializationDeserialization(JSON_OUTPUT_THIRD, ThirdObject.class);
     }
 }