content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONWriter;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.Method;
  import java.lang.reflect.Type;
  
  import static com.alibaba.fastjson2.JSONWriter.Feature.BeanToArray;
  
  abstract class FieldWriterObjectFinal<T>
          extends FieldWriterObject<T> {
      final Type fieldType;
      final Class fieldClass;
      volatile ObjectWriter objectWriter;
      final boolean refDetect;
  
      protected FieldWriterObjectFinal(
              String name,
              int ordinal,
              long features,
              String format,
              String label,
              Type fieldType,
              Class fieldClass,
              Field field,
              Method method
      ) {
          super(name, ordinal, features, format, null, label, fieldType, fieldClass, field, method);
          this.fieldType = fieldType;
          this.fieldClass = fieldClass;
          this.refDetect = !ObjectWriterProvider.isNotReferenceDetect(fieldClass);
      }
  
      @Override
      public ObjectWriter getObjectWriter(JSONWriter jsonWriter, Class valueClass) {
          if (fieldClass != valueClass) {
              return super.getObjectWriter(jsonWriter, valueClass);
          }
  
          if (objectWriter != null) {
              return objectWriter;
          } else {
              return objectWriter = super.getObjectWriter(jsonWriter, valueClass);
          }
      }
  
      @Override
      public boolean write(JSONWriter jsonWriter, T object) {
          Object value;
          try {
              value = getFieldValue(object);
          } catch (RuntimeException error) {
              if (jsonWriter.isIgnoreErrorGetter()) {
                  return false;
              }
              throw error;
          }
  
          if (value == null) {
              long features = this.features | jsonWriter.getFeatures();
              if ((features & (JSONWriter.Feature.WriteNulls.mask | JSONWriter.Feature.NullAsDefaultValue.mask)) == 0) {
                  return false;
              }
              writeFieldName(jsonWriter);
              if (fieldClass.isArray()) {
                  jsonWriter.writeArrayNull();
              } else if (fieldClass == StringBuffer.class || fieldClass == StringBuilder.class) {
                  jsonWriter.writeStringNull();
              } else {
                  jsonWriter.writeObjectNull(fieldClass);
              }
              return true;
          }
  
          ObjectWriter valueWriter = getObjectWriter(jsonWriter, fieldClass);
  
          if (unwrapped
                  && writeWithUnwrapped(jsonWriter, value, features, refDetect, valueWriter)) {
              return true;
          }
  
          writeFieldName(jsonWriter);
          if (jsonWriter.jsonb) {
              valueWriter.writeJSONB(jsonWriter, value, fieldName, fieldType, features);
          } else {
              valueWriter.write(jsonWriter, value, fieldName, fieldType, features);
          }
  
          return true;
      }
  
      @Override
      public void writeValue(JSONWriter jsonWriter, T object) {
          Object value = getFieldValue(object);
  
          if (value == null) {
              jsonWriter.writeNull();
              return;
          }
  
          boolean refDetect = this.refDetect && jsonWriter.isRefDetect();
  
          if (refDetect) {
              if (value == object) {
                  jsonWriter.writeReference("..");
                  return;
              }
  
              String refPath = jsonWriter.setPath(fieldName, value);
              if (refPath != null) {
                  jsonWriter.writeReference(refPath);
                  jsonWriter.popPath(value);
                  return;
              }
          }
  
          ObjectWriter valueWriter = getObjectWriter(jsonWriter, fieldClass);
  
          boolean beanToArray = (jsonWriter.getFeatures(features) & BeanToArray.mask) != 0;
          if (jsonWriter.jsonb) {
              if (beanToArray) {
                  valueWriter.writeArrayMappingJSONB(jsonWriter, value, fieldName, fieldType, features);
              } else {
                  valueWriter.writeJSONB(jsonWriter, value, fieldName, fieldType, features);
              }
          } else {
              if (beanToArray) {
                  valueWriter.writeArrayMapping(jsonWriter, value, fieldName, fieldType, features);
              } else {
                  valueWriter.write(jsonWriter, value, fieldName, fieldType, features);
              }
          }
  
          if (refDetect) {
              jsonWriter.popPath(value);
          }
      }
  }
  