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package com.base4j.util;

import com.base4j.util.bean.Constant;

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


/**
 * 批量查询工具

 *
 * @author huangjun
 * @version [版本号, 2017年9月22日]
 * @Description:解决查询参数中数据超过1000的问题
 * @ClassName:BatchQueryUtil
 */
public class BatchQueryUtil {

    /**
     * 回调函数接口
     *
     * @author Administrator
     */
    public interface CallBack {
        /**
         * 获取结果
         *
         * @param idList 主键集合
         * @return
         */
        List getResult(List idList);
    }

    private CallBack backFun;

    /**
     * 设置回调函数
     *
     * @param cbFun
     */
    public void setFun(CallBack cbFun) {
        backFun = cbFun;
    }

    /**
     * 当出现异常时会自动回调此函数，具体如何实现异常回调就不在这里详细描述了
     */
    @SuppressWarnings("unchecked")
    public  List exeHalder(List idListAll) {
        List listAll = new ArrayList();
        if (backFun != null) {
            List> splitListAll = CollectionsUtil.splitList(idListAll, Constant.SPLIT_SIZE);
            for (List splitList : splitListAll) {
                listAll.addAll(backFun.getResult(splitList));
            }
        }
        return listAll;
    }
}