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/*
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	   Copyright 2020 t-io

	   Licensed under the Apache License, Version 2.0 (the "License");
	   you may not use this file except in compliance with the License.
	   You may obtain a copy of the License at

	     http://www.apache.org/licenses/LICENSE-2.0

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*/
package org.tio.utils.page;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;

/**
 * @author tanyaowu
 * 2017年5月10日 下午12:01:18
 */
public class Page implements Serializable {

	private static final long serialVersionUID = 6551482606063638959L;
	private List list = null;                    //当前页的数据
	private Integer pageNumber;                                    //当前页码,从1开始,如果值小于等于0,则视为1
	private Integer pageSize;                                    //每页记录数
	private Integer totalRow;                                    //总条数
	private Integer totalPage;                                    //总页数

	public Page() {

	}

	/**
	 * @param list       list
	 * @param pageNumber pageNumber
	 * @param pageSize   pageSize
	 * @param totalRow   totalRow
	 * @author tanyaowu
	 */
	public Page(List list, Integer pageNumber, Integer pageSize, Integer totalRow) {
		this.list = list;
		this.pageNumber = pageNumber;
		this.pageSize = pageSize;
		this.totalRow = totalRow;
	}

	public Page(List list, Integer pageNumber, Integer pageSize, Integer totalRow, Function converter) {
		if (list != null && !list.isEmpty() && converter != null) {
			this.list = new ArrayList<>(list.size());
			for (Object object : list) {
				T t = converter.apply(object);
				this.list.add(t);
			}
		}
		this.pageNumber = pageNumber;
		this.pageSize = pageSize;
		this.totalRow = totalRow;
	}

	public List getList() {
		return list;
	}

	public void setList(List list) {
		this.list = list;
	}

	public Integer getPageNumber() {
		return pageNumber;
	}

	public void setPageNumber(Integer pageNumber) {
		this.pageNumber = pageNumber;
	}

	public Integer getPageSize() {
		return pageSize;
	}

	public void setPageSize(Integer pageSize) {
		this.pageSize = pageSize;
	}

	public Integer getTotalRow() {
		return totalRow;
	}

	public void setTotalRow(Integer totalRow) {
		this.totalRow = totalRow;
	}

	public Integer getTotalPage() {
		double result = Math.ceil(((double) (totalRow) / pageSize));
		this.totalPage = (int) result;
		return totalPage;
	}

	public void setTotalPage(Integer totalPage) {
		this.totalPage = totalPage;
	}

	public boolean isFirstPage() {
		return pageNumber <= 1;
	}

	public boolean isLastPage() {
		return pageNumber >= getTotalPage();
	}

	@Override
	public String toString() {
		return "Page{" +
			"list=" + list +
			", pageNumber=" + pageNumber +
			", pageSize=" + pageSize +
			", totalRow=" + totalRow +
			", totalPage=" + getTotalPage() +
			'}';
	}

}




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