com.github.dennisit.vplus.data.utils.PaginationUtils Maven / Gradle / Ivy
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package com.github.dennisit.vplus.data.utils;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.IService;
import com.github.dennisit.vplus.data.page.Pagination;
import com.google.common.collect.Lists;
import org.springframework.util.Assert;
import java.util.List;
/**
* Created by Elon.su on 17/10/28.
*/
@Deprecated
public class PaginationUtils {
/**
* 将mybatisplus分页模型转换成vplus分页模型
*
* @param page mybatisplus分页模型
* @param 对象集合
* @return 目标分页实体
*/
public static Pagination builder(IPage page) {
if (null == page) {
return Pagination.empty();
}
return new Pagination<>(page.getRecords(), page.getTotal(), (int) page.getCurrent(), (int) page.getSize());
}
/**
* 构建分页查询对象
*
* @param service 服务接口
* @param page 页码
* @param size 页量
* @param wrapper 查询条件
* @param 泛型约束
* @return page对象
*/
public static Pagination selectPagination(IService service, int page, int size, QueryWrapper wrapper) {
Assert.notNull(service, "服务接口实现不能为空");
Assert.notNull(wrapper, "查询条件不能为空");
return builder(service.page(new Page<>(Math.abs(page), Math.abs(size)), wrapper));
}
/**
* 获取分页数据集合
*
* @param page 分页实体
* @param 对象元素
* @return page页中的集合
*/
public static List items(IPage page) {
if (null == page) {
return Lists.newArrayList();
}
return page.getRecords();
}
/**
* 获取分页数据集合
*
* @param pagination 分页实体
* @param 对象元素
* @return page页中的集合
*/
public static List items(Pagination pagination) {
if (null == pagination) {
return Lists.newArrayList();
}
return pagination.getItems();
}
/**
* 抽取分页查询后的list集合
*
* @param service 业务接口
* @param page 页码
* @param size 页量
* @param wrapper 查询条件
* @param 查询实体
* @return page页中的集合
*/
public static List items(IService service, int page, int size, QueryWrapper wrapper) {
Assert.notNull(service, "服务接口实现不能为空");
Assert.notNull(wrapper, "查询条件不能为空");
return items(service.page(QueryUtils.page(page, size), wrapper));
}
}