package com.yanhui;

import java.util.List;

public class YanhuiResult {
	@SuppressWarnings("rawtypes")
	private List list; //返回某一页的记录列表
	
	private int allRow; //总记录数
	private int totalPage; //总页数
	private int currentPage; //当前页数
	private int pageSize; //每页记录数
	
	@SuppressWarnings("unused")
	private boolean isFirstPage; //是否为第一页
	@SuppressWarnings("unused")
	private boolean isLastPage; //是否为最后一页
	@SuppressWarnings("unused")
	private boolean hasPreviousPage; //是否有前一页
	@SuppressWarnings("unused")
	private boolean hasNextPage; //是否有下一页
	
	@SuppressWarnings("rawtypes")
	public List getList() {
		return list;
	}
	@SuppressWarnings("rawtypes")
	public void setList(List list) {
		this.list = list;
	}
	public int getAllRow() {
		return allRow;
	}
	public void setAllRow(int allRow) {
		this.allRow = allRow;
	}
	public int getTotalPage() {
		return totalPage;
	}
	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}
	public int getCurrentPage() {
		return currentPage;
	}
	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}
	public int getPageSize() {
		return pageSize;
	}
	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}
	
	/**
	 * 初始化分页信息
	 */
	public void init() {
		this.isFirstPage = isFirstPage();
		this.isLastPage = isLastPage();
		this.hasPreviousPage = isHasPreviousPage();
		this.hasNextPage = isHasNextPage();
	}
	
	public boolean isFirstPage(){
		return currentPage == 1;  //如果当前页是第1页
	}
	public boolean isLastPage(){
		return currentPage == totalPage;  //如果当前页是最后一页
	}
	public boolean isHasPreviousPage(){
		return currentPage != 1;  //只要当前页不是第1页
	}
	public boolean isHasNextPage(){
		return currentPage != totalPage;  //只要当前页不是最后一页
	}
	
	/**
	 * 计算总页数
	 * @param pageSize 每页记录数
	 * @param allRow 总记录数
	 * @return 总页数
	 */
	public static int countTotalPage(final int pageSize,final int allRow){
		int totalPage = allRow % pageSize == 0 ? allRow / pageSize : allRow/pageSize + 1 ;
		return totalPage;
	}
	
	/**
	 * 计算当前页开始记录
	 * @param pageSize 每页记录数
	 * @param cuurentPage 当前第几页
	 * @return 当前页开始记录号
	 */
	public static int countOffset(final int pageSize,final int cuurentPage){
		final int offset = pageSize*(cuurentPage - 1);
		return offset;
	}
	/**
	 * 计算当前页，若为0或者请求的URL没有“？page=”，则用1代替
	 * @param page 传入参数（可能为空，即0，则返回1）
	 * @return 当前页
	 */
	public static int countCurrentPage(int page){
		final int currentPage = (page==0?1:page);
		return currentPage;
	}
	
}