content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONWriter;
  import com.alibaba.fastjson2.util.TypeUtils;
  
  import java.lang.reflect.ParameterizedType;
  import java.lang.reflect.Type;
  import java.util.ArrayList;
  import java.util.List;
  
  import static com.alibaba.fastjson2.writer.ObjectWriterImplList.CLASS_SUBLIST;
  
  final class ObjectWriterImplListStr
          extends ObjectWriterPrimitiveImpl {
      static final ObjectWriterImplListStr INSTANCE = new ObjectWriterImplListStr();
  
      @Override
      public void write(JSONWriter jsonWriter, Object object, Object fieldName, Type fieldType, long features) {
          if (object == null) {
              jsonWriter.writeNull();
              return;
          }
  
          List list = (List) object;
  
          jsonWriter.startArray();
          for (int i = 0; i < list.size(); i++) {
              if (i != 0) {
                  jsonWriter.writeComma();
              }
  
              String item = (String) list.get(i);
              if (item == null) {
                  jsonWriter.writeNull();
                  continue;
              }
              jsonWriter.writeString(item);
          }
          jsonWriter.endArray();
      }
  
      @Override
      public void writeJSONB(JSONWriter jsonWriter, Object object, Object fieldName, Type fieldType, long features) {
          if (object == null) {
              jsonWriter.writeArrayNull();
              return;
          }
  
          Class fieldClass = null;
          if (fieldType == TypeUtils.PARAM_TYPE_LIST_STR) {
              fieldClass = List.class;
          } else if (fieldType instanceof Class) {
              fieldClass = (Class) fieldType;
          } else if (fieldType instanceof ParameterizedType) {
              ParameterizedType parameterizedType = (ParameterizedType) fieldType;
              Type rawType = parameterizedType.getRawType();
              if (rawType instanceof Class) {
                  fieldClass = (Class) rawType;
              }
          }
  
          Class<?> objectClass = object.getClass();
          if (objectClass != ArrayList.class && jsonWriter.isWriteTypeInfo(object, fieldClass, features)) {
              jsonWriter.writeTypeName(
                      TypeUtils.getTypeName(
                              objectClass == CLASS_SUBLIST ? ArrayList.class : objectClass
                      )
              );
          }
  
          List<String> list = (List) object;
          jsonWriter.writeString(list);
      }
  }
  