package org.svnadmin.common.entity;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @ClassName: PageBean
 * @Description: 分页工具类
 * @author hpboys
 * @date 2015年6月6日 下午3:34:22
 * @version V1.0  
 * @param <T>
 */
public class PageBean<T> implements Serializable {
	private int currentPage;//第几页,即当前页
	private int pageSize;//每页大小
	private int beginRow;//开始取的行数
	private int pageCount;//共几页
	private int recordCount;//记录总数
	private List<T> dataList;//数据
	private Map<String, Object> footer;//底部统计区

	private int startPage;//开始页码数
	private int endPage;//结束页码数
	private List<Integer> pages;//动态页码
	private int maxShowPageNum = 6;//最大显示页码数
	private Map<String, String> queryMap;//查询参数
	private String sqlWhere;

	public PageBean(){}

	public PageBean(int pageNumber, int pageSize) {
		this.currentPage = pageNumber;
		this.pageSize = pageSize;
	}
	
	public PageBean(int pageNumber, int pageSize,int maxShowPageNum) {
		this.currentPage = pageNumber;
		this.pageSize = pageSize;
		this.maxShowPageNum = maxShowPageNum;
	}
	
	private void initPages(){
		int startPage = 0;
    	int endPage = 0;
    	int ban_page_Num = (this.maxShowPageNum % 2)==0? (this.maxShowPageNum / 2):(this.maxShowPageNum / 2)+1;
    	if ( this.currentPage <= ban_page_Num) {
    		// 如果当前页码小于显示最大页码数的一半
    		startPage = 1;
    		if (pageCount <= this.maxShowPageNum) {
    			endPage = pageCount+1;
    		} else {
    			endPage = this.maxShowPageNum;
    		}
    	} else if ( this.currentPage > (pageCount - ban_page_Num) ) {
    		// 如果当前页面大于最大页数-显示最大页码数的一半
    		startPage = pageCount - this.maxShowPageNum;
    		endPage = pageCount;
    	} else {
    		// 否则，保持当前页码在输出页码数的中间
    		startPage = this.currentPage - ban_page_Num + 1;
    		endPage = this.currentPage + ban_page_Num;
    	}
    	if (startPage < 1) startPage = 1;
    	if (endPage > pageCount) endPage = pageCount;
    	this.startPage = startPage;
    	this.endPage = endPage;
    	this.pages = new ArrayList<Integer>();
    	for (int i = this.startPage; i <= this.endPage; i++) {
			this.pages.add(i);
		}
	}
	
	
	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 int getPageCount() {
		return pageCount;
	}
	
	public void setPageCount(int recordCount) {
		if(recordCount%pageSize==0){
			this.pageCount = recordCount/pageSize;
		}else{
			this.pageCount = recordCount/pageSize+1;
		}
		initPages();
	}
	public int getRecordCount() {
		return recordCount;
	}
	public void setRecordCount(int recordCount) {
		this.recordCount = recordCount;
	}
	public List<T> getDataList() {
		if(null==dataList){
			return new ArrayList<T>(0);
		}
		return dataList;
	}
	public void setDataList(List<T> dataList) {
		this.dataList = dataList;
	}

	public Map<String, Object> getFooter() {
		return footer;
	}

	public void setFooter(Map<String, Object> footer) {
		this.footer = footer;
	}

	public int getStartPage() {
		return this.startPage;
	}

	public void setStartPage(int startPage) {
		this.startPage = startPage;
	}

	public int getEndPage() {
		return endPage;
	}

	public void setEndPage(int endPage) {
		this.endPage = endPage;
	}

	public void setPages(List<Integer> pages) {
		this.pages = pages;
	}

	public List<Integer> getPages() {
    	return pages;
	}

	public int getMaxShowPageNum() {
		return maxShowPageNum;
	}

	public void setMaxShowPageNum(int maxShowPageNum) {
		this.maxShowPageNum = maxShowPageNum;
	}

	public int getBeginRow() {
		this.beginRow = (this.getCurrentPage()<=1?0:this.getCurrentPage()-1)*this.getPageSize();
		return this.beginRow;
	}

	public void setQuery(String queryKey,String queryVal) {
		if(this.queryMap == null){
			this.queryMap = new HashMap<String,String>();
		}
		this.queryMap.put(queryKey,queryVal);
	}

	public void setQueryMap(Map<String, String> queryMap) {
		this.queryMap = queryMap;
	}
	
	public Map<String, String> getQueryMap() {
		return queryMap;
	}

	/**
	 * @Description: 传入查询参数KEY，得到值
	 * @return String 返回类型
	 */
	public String get(String key){
		return this.queryMap==null? null:this.queryMap.get(key);
	}

	public String getSqlWhere() {
		return sqlWhere;
	}

	public void setSqlWhere(String sqlWhere) {
		this.sqlWhere = sqlWhere;
	}

	
}