package com.xs.util;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.util.TypeUtils;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import org.springframework.security.core.authority.SimpleGrantedAuthority;

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

public class FastJsonRedisSerializer<T> implements RedisSerializer<T>
{

    public static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;

    private final Class<T> clazz;

    static
    {
        ParserConfig.getGlobalInstance().addAccept("com.xs.domain");
        ParserConfig.getGlobalInstance().addAccept("com.xs.vo");
        ParserConfig.getGlobalInstance().addAccept("com.xs.dto");
        ParserConfig.getGlobalInstance().addAccept("org.springframework.security.core.authority.");
        TypeUtils.addMapping("org.springframework.security.core.authority.SimpleGrantedAuthority", SimpleGrantedAuthority.class);
    }

    public FastJsonRedisSerializer(Class<T> clazz)
    {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException
    {
        if (t == null)
        {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException
    {
        if (bytes == null || bytes.length <= 0)
        {
            return null;
        }
        String str = new String(bytes, DEFAULT_CHARSET);

        return JSON.parseObject(str, clazz);
    }


    protected JavaType getJavaType(Class<?> clazz)
    {
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}
