deliver/src/main/java/com/sumbytes/common/base/domain/Result.java

package com.sumbytes.common.base.domain;

import com.sumbytes.common.constant.ResultConstants;
import com.sumbytes.common.enums.ErrorEnum;
import lombok.Data;
import lombok.experimental.Accessors;
import org.apache.commons.lang3.StringUtils;

import java.util.ArrayList;
import java.util.List;

/**
 * 用于向前端返回统一的结果对象
 *
 * @param <T> 实体类型
 * @author Young
 */
@Data
@Accessors(chain = true)
public class Result<T> {

    /**
     * 操作标识，标记
     */
    private int success = 0;
    /**
     * 结果编码
     */
    private String resultCode;

    /**
     * 提示信息
     */
    private String message;

    /**
     * 结果对象
     */
    private T model;

    /**
     * 结果集对象
     */
    private List<T> models;

    /**
     * 分页信息对象
     */
    private PageInfo pageInfo;

    /**
     * 扩展字段
     */
    private Object extra;

    /**
     * 禁止空参构造
     */
    private Result() {
    }

    /**
     * 通过操作标识及提示信息构建结果对象
     */
    private static <T> Result<T> createWithSuccessFlag(int success) {
        Result result = new Result();
        result.setSuccess(success);
        return result;
    }

    public static <T> Result<T> createWithSuccessMessage() {
        Result result = createWithSuccessFlag(ResultConstants.YES);
        result.setResultCode(ResultConstants.OPERATION_SUCCESS);
        result.setMessage(ResultConstants.SUCCESS_MESSAGE);
        return result;
    }

    public static <T> Result<T> createWithSuccessMessage(String message) {
        Result result = createWithSuccessFlag(ResultConstants.YES);
        result.setResultCode(ResultConstants.OPERATION_SUCCESS);
        result.setMessage(StringUtils.isBlank(message) ? ResultConstants.SUCCESS_MESSAGE : message);
        return result;
    }

    public static <T> Result<T> createWithModel(T model) {
        Result result = createWithSuccessMessage();
        result.setModel(model);
        return result;
    }

    public static <T> Result<T> createWithModel(String message, T model) {
        Result result = createWithSuccessMessage(message);
        result.setModel(model);
        return result;
    }

    public static <T> Result<T> createWithModels(String message, List<T> models) {
        Result result = createWithSuccessMessage(message);
        result.setModels(models == null ? new ArrayList<>(0) : models);
        return result;
    }

    public static <T> Result<T> createWithModels(List<T> models) {
        Result result = createWithSuccessMessage();
        result.setModels(models == null ? new ArrayList<>(0) : models);
        return result;
    }

    public static <T> Result<T> createWithPaging(String message, List<T> models, PageInfo pagingInfo) {
        Result result = createWithModels(message, models == null ? new ArrayList<>(0) : models);
        result.setPageInfo(pagingInfo);
        return result;
    }

    public static <T> Result<T> createWithPaging(List<T> models, PageInfo pagingInfo) {
        Result result = createWithModels(models == null ? new ArrayList<>(0) : models);
        result.setPageInfo(pagingInfo);
        return result;
    }

    public static <T> Result<T> createWithErrorMessage(String message, String errorCode) {
        Result result = createWithSuccessFlag(ResultConstants.NO);
        result.setMessage(message);
        result.setResultCode(errorCode);
        return result;
    }

    public static <T> Result<T> createWithErrorMessage(ErrorEnum errorEnum) {
        return createWithErrorMessage(errorEnum.getMsg(errorEnum.getCode()), errorEnum.getCode());
    }

    public static <T> Result<T> createWithError() {
        return createWithErrorMessage(ErrorEnum.ERROR);
    }
}