package com.ard.sample.annotation.util;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.ard.sample.annotation.model.dto.AnnotationPointsDTO;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
public class JsonSerializeUtil {
    private static final ObjectMapper objectMapper = new ObjectMapper();

    // 序列化：List<AnnotationPointsDTO> → byte[]
    public static byte[] serialize(List<AnnotationPointsDTO> points) throws JsonProcessingException {
        if (points == null) {
            return null;
        }
        String json = objectMapper.writeValueAsString(points);
        return json.getBytes();
    }

    // 反序列化：byte[] → List<AnnotationPointsDTO>
    public static List<AnnotationPointsDTO> deserialize(byte[] bytes) throws JsonProcessingException {
        if (bytes == null || bytes.length == 0) {
            return null;
        }
        String json = new String(bytes);
        return objectMapper.readValue(json,
                objectMapper.getTypeFactory().constructCollectionType(List.class, AnnotationPointsDTO.class));
    }
}