content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONWriter;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.Method;
  import java.util.function.ToDoubleFunction;
  
  final class FieldWriterDoubleValueFunc
          extends FieldWriter {
      final ToDoubleFunction function;
  
      FieldWriterDoubleValueFunc(
              String fieldName,
              int ordinal,
              long features,
              String format,
              String label,
              Field field,
              Method method,
              ToDoubleFunction function
      ) {
          super(fieldName, ordinal, features, format, null, label, double.class, double.class, field, method);
          this.function = function;
      }
  
      @Override
      public Object getFieldValue(Object object) {
          return function.applyAsDouble(object);
      }
  
      @Override
      public void writeValue(JSONWriter jsonWriter, Object object) {
          double value = function.applyAsDouble(object);
          if (decimalFormat != null) {
              jsonWriter.writeDouble(value, decimalFormat);
          } else {
              jsonWriter.writeDouble(value);
          }
      }
  
      @Override
      public boolean write(JSONWriter jsonWriter, Object object) {
          double value;
          try {
              value = function.applyAsDouble(object);
          } catch (RuntimeException error) {
              if (jsonWriter.isIgnoreErrorGetter()) {
                  return false;
              }
              throw error;
          }
  
          writeFieldName(jsonWriter);
          if (decimalFormat != null) {
              jsonWriter.writeDouble(value, decimalFormat);
          } else {
              jsonWriter.writeDouble(value);
          }
          return true;
      }
  }
  