/*
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* Copyright (c) 2018-2028, DreamLu All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: DreamLu 卢春梦 (596392912@qq.com)
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*/
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package org.springblade.core.mp.utils;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import org.springblade.core.tool.utils.BeanUtil;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.function.Function;
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/**
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* 分页工具类
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*
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* @author L.cm
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*/
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public class PageUtil {
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/**
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* 2个 IPage 转 Page
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*
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* @param page IPage
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* @param target 需要copy转换的类型
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* @param <T> 泛型
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* @return PageResult
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*/
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public static <T> Page<T> toPage(IPage<?> page, Class<T> target) {
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List<T> records = BeanUtil.copy(page.getRecords(), target);
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return toPage(page, records);
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}
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/**
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* 2个 IPage 转 Page
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*
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* @param page IPage
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* @param records 转换过的list模型
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* @param <T> 泛型
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* @return PageResult
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*/
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public static <T> Page<T> toPage(IPage<?> page, List<T> records) {
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Page<T> pageResult = new Page<>();
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pageResult.setCurrent(page.getCurrent());
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pageResult.setSize(page.getSize());
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pageResult.setPages(page.getPages());
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pageResult.setTotal(page.getTotal());
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pageResult.setRecords(records);
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return pageResult;
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}
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/**
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* Page 转换
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*
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* @param page IPage
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* @param function 转换过的函数
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* @param <T> 泛型
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* @return PageResult
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*/
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public static <T, R> Page<R> toPage(IPage<T> page, Function<T, R> function) {
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List<R> records = new ArrayList<>();
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for (T record : page.getRecords()) {
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records.add(function.apply(record));
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}
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return toPage(page, records);
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}
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}
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