package com.intelsrc.bean;

import java.util.List;
@SuppressWarnings("unchecked")
public class PageBean {
	
	private List list ;
	private int allRow;
	private int totalPage;
	public int getTotalPage() {
		return totalPage;
	}
	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}
	private int currentPage;
	private int pageSize;
	
	
	private boolean isFirstPage;

	private boolean isLastPage;
	
	private boolean hasNextPage;
	
	private boolean hasPreviousPage;
	
	@SuppressWarnings("unchecked")
	public List getList() {
		return list;
	}
	@SuppressWarnings("unchecked")
	public void setList(List list) {
		this.list = list;
	}
	public int getAllRow() {
		return allRow;
	}
	public void setAllRow(int allRow) {
		this.allRow = allRow;
	}
	
	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;
	}
	
	

	
	public void init(){
		this.isFirstPage=this.isFirstPage();
		this.isLastPage=this.isLastPage();
		this.hasNextPage=this.isHasNextPage();
		this.hasPreviousPage=this.isHasPreviousPage();
		
	}
	
	public boolean isFirstPage() {
		return currentPage==1;
	}
	public boolean isLastPage() {
		return currentPage==totalPage;
	}
	public boolean isHasNextPage() {
		return currentPage!=1;
	}
	public boolean isHasPreviousPage() {
		return currentPage!=totalPage;
	}
	/**
	 * 计算总页数，静态方法，供外部直接通过类名调用
	 * @param pageSize
	 * @param allRow
	 * @return 总页数
	 */
	public static int countToltalPage(final int pageSize,int allRow){
		int toltalPage=allRow%pageSize==0?allRow/pageSize:allRow/pageSize+1;
		return toltalPage;
	}
	/**
	 * 计算当前页开始记录
	 * @param pageSize
	 * @param currentPage
	 * @return  当前页开始记录号
	 */
	public static int countOffset(final int pageSize,final int currentPage){
		final int offset=pageSize*(pageSize-1);
		return offset;
		
	}
	/**
	 * 计算当前页，若为0或者请求的URL中没有"?page=",则用1代替。
	 * @param page  page 传入的参数(可能为空,即0,则返回1)
	 * @return 当前页
	 */
	public static int countCurrentPage(int page){
        final int curPage = (page==0?1:page);
        return curPage;
    }

}