content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONWriter;
  import com.alibaba.fastjson2.util.TypeUtils;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.Type;
  import java.math.BigDecimal;
  import java.text.DecimalFormat;
  
  import static com.alibaba.fastjson2.JSONWriter.Feature.*;
  
  final class FieldWriterObjectArrayField<T>
          extends FieldWriter<T> {
      final Type itemType;
      final Class itemClass;
      ObjectWriter itemObjectWriter;
      FieldWriterObjectArrayField(
              String fieldName,
              Type itemType,
              int ordinal,
              long features,
              String format,
              String label,
              Type fieldType,
              Class fieldClass,
              Field field
      ) {
          super(fieldName, ordinal, features, format, null, label, fieldType, fieldClass, field, null);
          this.itemType = itemType;
          if (itemType instanceof Class) {
              itemClass = (Class) itemType;
          } else {
              itemClass = TypeUtils.getMapping(itemType);
          }
      }
  
      @Override
      public ObjectWriter getItemWriter(JSONWriter jsonWriter, Type itemType) {
          if (itemType == null || itemType == this.itemType) {
              if (itemObjectWriter != null) {
                  return itemObjectWriter;
              }
  
              if (itemType == Double.class) {
                  itemObjectWriter = new ObjectWriterImplDouble(new DecimalFormat(format));
              } else if (itemType == Float.class) {
                  itemObjectWriter = new ObjectWriterImplFloat(new DecimalFormat(format));
              } else if (itemType == BigDecimal.class && decimalFormat != null) {
                  itemObjectWriter = new ObjectWriterImplBigDecimal(decimalFormat, null);
              } else {
                  itemObjectWriter = jsonWriter
                          .getObjectWriter(this.itemType, itemClass);
              }
              return itemObjectWriter;
          }
          return jsonWriter
                  .getObjectWriter(itemType, TypeUtils.getClass(itemType));
      }
  
      @Override
      public boolean write(JSONWriter jsonWriter, T object) {
          Object[] value = (Object[]) getFieldValue(object);
  
          if (value == null) {
              long features = this.features | jsonWriter.getFeatures();
              if ((features & (WriteNulls.mask | NullAsDefaultValue.mask | WriteNullListAsEmpty.mask)) != 0) {
                  writeFieldName(jsonWriter);
                  jsonWriter.writeArrayNull();
                  return true;
              } else {
                  return false;
              }
          }
  
          writeArray(jsonWriter, true, value);
          return true;
      }
  
      @Override
      public void writeValue(JSONWriter jsonWriter, T object) {
          Object[] value = (Object[]) getFieldValue(object);
  
          if (value == null) {
              jsonWriter.writeNull();
              return;
          }
  
          writeArray(jsonWriter, false, value);
      }
  
      public void writeArray(JSONWriter jsonWriter, boolean writeFieldName, Object[] array) {
          Class previousClass = null;
          ObjectWriter previousObjectWriter = null;
  
          long features = jsonWriter.getFeatures();
          boolean refDetect = (features & JSONWriter.Feature.ReferenceDetection.mask) != 0;
          boolean previousItemRefDetect = refDetect;
  
          if (writeFieldName) {
              if (array.length == 0 && (features & JSONWriter.Feature.NotWriteEmptyArray.mask) != 0) {
                  return;
              }
  
              writeFieldName(jsonWriter);
          }
  
          if (refDetect) {
              String path = jsonWriter.setPath(fieldName, array);
              if (path != null) {
                  jsonWriter.writeReference(path);
                  return;
              }
          }
  
          if (jsonWriter.jsonb) {
              Class arrayClass = array.getClass();
              if (arrayClass != this.fieldClass) {
                  jsonWriter.writeTypeName(
                          TypeUtils.getTypeName(arrayClass));
              }
  
              int size = array.length;
              jsonWriter.startArray(size);
              for (int i = 0; i < size; i++) {
                  Object item = array[i];
                  if (item == null) {
                      jsonWriter.writeNull();
                      continue;
                  }
  
                  boolean itemRefDetect;
                  Class<?> itemClass = item.getClass();
                  ObjectWriter itemObjectWriter;
                  if (itemClass != previousClass) {
                      itemRefDetect = jsonWriter.isRefDetect();
                      previousObjectWriter = getItemWriter(jsonWriter, itemClass);
                      previousClass = itemClass;
                      if (itemRefDetect) {
                          itemRefDetect = !ObjectWriterProvider.isNotReferenceDetect(itemClass);
                      }
                      previousItemRefDetect = itemRefDetect;
                  } else {
                      itemRefDetect = previousItemRefDetect;
                  }
  
                  itemObjectWriter = previousObjectWriter;
  
                  if (itemRefDetect) {
                      String refPath = jsonWriter.setPath(i, item);
                      if (refPath != null) {
                          jsonWriter.writeReference(refPath);
                          jsonWriter.popPath(item);
                          continue;
                      }
                  }
  
                  itemObjectWriter.writeJSONB(jsonWriter, item, i, this.itemType, this.features);
  
                  if (itemRefDetect) {
                      jsonWriter.popPath(item);
                  }
              }
  
              if (refDetect) {
                  jsonWriter.popPath(array);
              }
  
              return;
          }
  
          jsonWriter.startArray();
          for (int i = 0; i < array.length; i++) {
              if (i != 0) {
                  jsonWriter.writeComma();
              }
  
              Object item = array[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 ObjectWriter getObjectWriter(JSONWriter jsonWriter, Class valueClass) {
          if (valueClass == String[].class) {
              return ObjectWriterImplStringArray.INSTANCE;
          }
  
          if (valueClass == Float[].class) {
              if (decimalFormat != null) {
                  return new ObjectWriterArrayFinal(Float.class, decimalFormat);
              } else {
                  return ObjectWriterArrayFinal.FLOAT_ARRAY;
              }
          } else if (valueClass == Double[].class) {
              if (decimalFormat != null) {
                  return new ObjectWriterArrayFinal(Double.class, decimalFormat);
              } else {
                  return ObjectWriterArrayFinal.DOUBLE_ARRAY;
              }
          } else if (valueClass == BigDecimal[].class) {
              if (decimalFormat != null) {
                  return new ObjectWriterArrayFinal(BigDecimal.class, decimalFormat);
              } else {
                  return ObjectWriterArrayFinal.DECIMAL_ARRAY;
              }
          }
  
          return jsonWriter.getObjectWriter(valueClass);
      }
  }
  