Result.java

package com.myxrk.rbac.result;

import com.fasterxml.jackson.annotation.JsonInclude;
import lombok.Data;
import lombok.ToString;

import java.util.Collections;
import java.util.List;

@JsonInclude(JsonInclude.Include.NON_EMPTY)
@ToString
@Data
public class Result<T> {
    private int code;
    private String message;
    private List<T> data;

    public Result(int code, String message, List<T> data) {
        this.code = code;
        this.message = message;
        this.data = data;
    }

    public static <U> Result<U> error(int code, U msg) {
        if (msg == null) {
            return new Result<>(code, "", null);
        }

        if (msg instanceof String msgStr) {
            return new Result<>(code, msgStr, null);
        }

        return new Result<>(code, String.valueOf(msg), null);
    }

    public static <T> Result<T> success(T data) {
        return new Result<>(0, "Okay", Collections.singletonList(data));
    }

    public static <T> Result<T> success(List<T> data) {
        return new Result<>(0, "Okay", data);
    }
}