Fix StarRocksJsonSerializer will transform array/map/row to string (#5281)

Author: ruanwenjun

seatunnel-connectors-v2/connector-starrocks/src/main/java/org/apache/seatunnel/connectors/seatunnel/starrocks/serialize/StarRocksJsonSerializer.java

@@ -19,9 +19,10 @@
 
 import org.apache.seatunnel.api.table.type.SeaTunnelRow;
 import org.apache.seatunnel.api.table.type.SeaTunnelRowType;
+import org.apache.seatunnel.api.table.type.SqlType;
 import org.apache.seatunnel.common.utils.JsonUtils;
 
-import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Map;
 
 public class StarRocksJsonSerializer extends StarRocksBaseSerializer
@@ -38,10 +39,22 @@ public StarRocksJsonSerializer(SeaTunnelRowType seaTunnelRowType, boolean enable
 
     @Override
     public String serialize(SeaTunnelRow row) {
-        Map<String, Object> rowMap = new HashMap<>(row.getFields().length);
+        Map<String, Object> rowMap = new LinkedHashMap<>(row.getFields().length);
 
         for (int i = 0; i < row.getFields().length; i++) {
-            Object value = convert(seaTunnelRowType.getFieldType(i), row.getField(i));
+            SqlType sqlType = seaTunnelRowType.getFieldType(i).getSqlType();
+            Object value;
+            if (sqlType == SqlType.ARRAY
+                    || sqlType == SqlType.MAP
+                    || sqlType == SqlType.ROW
+                    || sqlType == SqlType.MULTIPLE_ROW) {
+                // If the field type is complex type, we should keep the origin value.
+                // It will be transformed to json string in the next step
+                // JsonUtils.toJsonString(rowMap).
+                value = row.getField(i);
+            } else {
+                value = convert(seaTunnelRowType.getFieldType(i), row.getField(i));
+            }
             rowMap.put(seaTunnelRowType.getFieldName(i), value);
         }
         if (enableUpsertDelete) {

seatunnel-connectors-v2/connector-starrocks/src/test/java/org/apache/seatunnel/connectors/seatunnel/starrocks/serialize/StarRocksJsonSerializerTest.java

@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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
+ *
+ *    http://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.apache.seatunnel.connectors.seatunnel.starrocks.serialize;
+
+import org.apache.seatunnel.api.table.type.ArrayType;
+import org.apache.seatunnel.api.table.type.BasicType;
+import org.apache.seatunnel.api.table.type.MapType;
+import org.apache.seatunnel.api.table.type.SeaTunnelDataType;
+import org.apache.seatunnel.api.table.type.SeaTunnelRow;
+import org.apache.seatunnel.api.table.type.SeaTunnelRowType;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.Collections;
+
+public class StarRocksJsonSerializerTest {
+
+    @Test
+    public void serialize() {
+        String[] filedNames = {"id", "name", "array", "map"};
+        SeaTunnelDataType<?>[] filedTypes = {
+            BasicType.LONG_TYPE,
+            BasicType.STRING_TYPE,
+            ArrayType.STRING_ARRAY_TYPE,
+            new MapType<>(BasicType.STRING_TYPE, BasicType.STRING_TYPE)
+        };
+
+        SeaTunnelRowType seaTunnelRowType = new SeaTunnelRowType(filedNames, filedTypes);
+        StarRocksJsonSerializer starRocksJsonSerializer =
+                new StarRocksJsonSerializer(seaTunnelRowType, false);
+        Object[] fields = {
+            1, "Tom", new String[] {"tag1", "tag2"}, Collections.singletonMap("key1", "value1")
+        };
+        SeaTunnelRow seaTunnelRow = new SeaTunnelRow(fields);
+        String jsonString = starRocksJsonSerializer.serialize(seaTunnelRow);
+        Assertions.assertEquals(
+                "{\"id\":1,\"name\":\"Tom\",\"array\":[\"tag1\",\"tag2\"],\"map\":{\"key1\":\"value1\"}}",
+                jsonString);
+    }
+}