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 java.util.List;
  import java.util.function.Function;
  
  import static com.alibaba.fastjson2.JSONWriter.Feature.*;
  
  final class FieldWriterListFunc<T>
          extends FieldWriterList<T> {
      final Function<T, List> function;
  
      FieldWriterListFunc(
              String fieldName,
              int ordinal,
              long features,
              String format,
              String label,
              Type itemType,
              Field field,
              Method method,
              Function<T, List> function,
              Type fieldType,
              Class fieldClass,
              Class<?> contentAs
      ) {
          super(fieldName, itemType, ordinal, features, format, label, fieldType, fieldClass, field, method, contentAs);
          this.function = function;
      }
  
      @Override
      public Object getFieldValue(T object) {
          return function.apply(object);
      }
  
      @Override
      public boolean write(JSONWriter jsonWriter, T object) {
          List value;
          try {
              value = function.apply(object);
          } catch (RuntimeException error) {
              if (jsonWriter.isIgnoreErrorGetter()) {
                  return false;
              }
              throw error;
          }
  
          if (value == null) {
              long features = this.features | jsonWriter.getFeatures();
              if ((features & (WriteNulls.mask | NullAsDefaultValue.mask | WriteNullListAsEmpty.mask)) == 0) {
                  return false;
              }
              writeFieldName(jsonWriter);
              jsonWriter.writeArrayNull(features);
              return true;
          }
  
          if ((features & NotWriteEmptyArray.mask) != 0 && value.isEmpty()) {
              return false;
          }
  
          String refPath = jsonWriter.setPath(this, value);
          if (refPath != null) {
              writeFieldName(jsonWriter);
              jsonWriter.writeReference(refPath);
              jsonWriter.popPath(value);
              return true;
          }
  
          if (itemType == String.class) {
              writeListStr(jsonWriter, true, value);
          } else {
              writeList(jsonWriter, value);
          }
          jsonWriter.popPath(value);
          return true;
      }
  
      @Override
      public void writeValue(JSONWriter jsonWriter, T object) {
          List list = function.apply(object);
          if (list == null) {
              jsonWriter.writeNull();
              return;
          }
  
          Class previousClass = null;
          ObjectWriter previousObjectWriter = null;
  
          if (jsonWriter.jsonb) {
              int size = list.size();
              jsonWriter.startArray(size);
  
              for (int i = 0; i < size; i++) {
                  Object item = list.get(i);
                  if (item == null) {
                      jsonWriter.writeNull();
                      continue;
                  }
                  Class<?> itemClass = item.getClass();
                  ObjectWriter itemObjectWriter;
                  if (itemClass == previousClass) {
                      itemObjectWriter = previousObjectWriter;
                  } else {
                      itemObjectWriter = getItemWriter(jsonWriter, itemClass);
                      previousClass = itemClass;
                      previousObjectWriter = itemObjectWriter;
                  }
  
                  itemObjectWriter.write(jsonWriter, item);
              }
              return;
          }
  
          jsonWriter.startArray();
          for (int i = 0; i < list.size(); i++) {
              if (i != 0) {
                  jsonWriter.writeComma();
              }
  
              Object item = list.get(i);
              if (item == null) {
                  jsonWriter.writeNull();
                  continue;
              }
              Class<?> itemClass = item.getClass();
              ObjectWriter itemObjectWriter;
              if (itemClass == previousClass) {
                  itemObjectWriter = previousObjectWriter;
              } else {
                  itemObjectWriter = getItemWriter(jsonWriter, itemClass);
                  previousClass = itemClass;
                  previousObjectWriter = itemObjectWriter;
              }
  
              itemObjectWriter.write(jsonWriter, item);
          }
          jsonWriter.endArray();
      }
  
      @Override
      public Function getFunction() {
          return function;
      }
  }
  