/*****************************************************************************
* *
* This file is part of the tna framework distribution. *
* Documentation and updates may be get from biaoping.yin the author of *
* this framework *
* *
* Sun Public License Notice: *
* *
* The contents of this file are subject to the Sun Public License Version *
* 1.0 (the "License"); you may not use this file except in compliance with *
* the License. A copy of the License is available at http://www.sun.com *
* *
* The Original Code is tag. The Initial Developer of the Original *
* Code is biaoping yin. Portions created by biaoping yin are Copyright *
* (C) 2000. All Rights Reserved. *
* *
* GNU Public License Notice: *
* *
* Alternatively, the contents of this file may be used under the terms of *
* the GNU Lesser General Public License (the "LGPL"), in which case the *
* provisions of LGPL are applicable instead of those above. If you wish to *
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* indicate your decision by deleting the provisions above and replace *
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* biaoping.yin (yin-bp@163.com) *
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*****************************************************************************/
package com.frameworkset.common.tag.pager.model;
import com.frameworkset.common.tag.pager.DataInfo;
/**
* 保存所有的页面参数
* @author biaoping.yin
* created on 2005-5-18
* version 1.0
*/
public class PageInfo implements ModelObject{
/**每页显示的记录条数*/
protected int maxPageItems = 0;
/**记录总数*/
protected long totalSize = 0;
/**标识列表模式*/
protected boolean isList = false;
/**数据库查询语句*/
protected String statement ;
/**数据库链接池名称*/
protected String dbName;
/**排序字段*/
protected String sortKey;
/**页面查询参数*/
protected String queryString;
/**
* 分页时，控制是否导出全部数据，
*/
private boolean eportAll = false;
/**
* 定义页面上要显示的所有字段域
*/
protected MetaDatas metaDatas = null;
/**页号*/
private Object pageNumberInteger;
/**页码*/
private long pageNumber;
private DataInfo dataInfo ;
/**
* @return Returns the maxPageItem.
*/
public int getMaxPageItems() {
return maxPageItems;
}
/**
* @param maxPageItems The maxPageItem to set.
*/
public void setMaxPageItems(int maxPageItems) {
}
/**
* @return Returns the totalSize.
*/
public long getTotalSize() {
return totalSize;
}
/**
* @param totalSize The totalSize to set.
*/
public void setTotalSize(long totalSize) {
this.totalSize = totalSize;
}
/**
* @return Returns the dbName.
*/
public String getDbName() {
return dbName;
}
/**
* @param dbName The dbName to set.
*/
public void setDbName(String dbName) {
this.dbName = dbName;
}
/**
* @return Returns the isList.
*/
public boolean isList() {
return isList;
}
/**
* @param isList The isList to set.
*/
public void setList(boolean isList) {
this.isList = isList;
}
/**
* @return Returns the sortKey.
*/
public String getSortKey() {
return sortKey;
}
/**
* @param sortKey The sortKey to set.
*/
public void setSortKey(String sortKey) {
this.sortKey = sortKey;
}
/**
* @return Returns the statement.
*/
public String getStatement() {
return statement;
}
/**
* @param statement The statement to set.
*/
public void setStatement(String statement) {
this.statement = statement;
}
/**
* @return Returns the eportAll.
*/
public boolean isEportAll() {
return eportAll;
}
/**
* @param eportAll The eportAll to set.
*/
public void setEportAll(boolean eportAll) {
this.eportAll = eportAll;
}
/**
* 功能说明：计算当前页面编号
* @param offset
* @return long
*/
private final long pageNumber(long offset) {
return (offset / maxPageItems) + (offset % maxPageItems == 0 ? 0 : 1);
}
/**
* 获取页面总数量
*
* @return int
*/
final long getPageCount() {
return pageNumber(getTotalSize());
}
/**
* 获取最后一页的页码，比如共有5页，返回4。如果只有0页则返回0；
* @return int
*/
public long getLastPageNumber()
{
return Math.max(0,getPageCount() - 1);
}
public void initContext(long offset,long totalsize)
{
this.totalSize = totalsize;
try {
offset = Math.max(0, offset);
long newPageCount = pageNumber(offset);
long lastPagerNumber = getLastPageNumber();
if(newPageCount > lastPagerNumber)
{
offset = lastPagerNumber * getMaxPageItems();
/**
* 重新获取数据，如果数据库底层能够处理这个问题，将不需要重新获取数据
*/
//setDataInfo(getData());
}
//if (isOffset) 于2004/4/30注释
//itemCount = offset;
}
catch (NumberFormatException ignore)
{
ignore.printStackTrace();
}
/**
* 当前第几页,从零开始
*/
pageNumber = pageNumber(offset);
/**
* 当前页码，从1开始
*/
pageNumberInteger = new Long(1+pageNumber);
}
/**
* @return Returns the pageNumber.
*/
public long getPageNumber() {
return pageNumber;
}
/**
* @param pageNumber The pageNumber to set.
*/
public void setPageNumber(int pageNumber) {
this.pageNumber = pageNumber;
}
/**
* @return Returns the pageNumberInteger.
*/
public Object getPageNumberInteger() {
return pageNumberInteger;
}
/**
* @param pageNumberInteger The pageNumberInteger to set.
*/
public void setPageNumberInteger(Object pageNumberInteger) {
this.pageNumberInteger = pageNumberInteger;
}
/**
* @return Returns the queryString.
*/
public String getQueryString() {
return queryString;
}
/**
* @param queryString The queryString to set.
*/
public void setQueryString(String queryString) {
this.queryString = queryString;
}
/**
* @return Returns the dataInfo.
*/
public DataInfo getDataInfo() {
return dataInfo;
}
/**
* @param dataInfo The dataInfo to set.
*/
public void setDataInfo(DataInfo dataInfo) {
this.dataInfo = dataInfo;
}
/**
* @return Returns the metaDatas.
*/
public MetaDatas getMetaDatas() {
return metaDatas;
}
/**
* @param metaDatas The metaDatas to set.
*/
public void setMetaDatas(MetaDatas metaDatas) {
this.metaDatas = metaDatas;
}
}