rowsetpage.java

一个完整的代码管理系统的源代码

/*
 * Copyright (c) 2008-2010 Tanming1003 Inc.
 * All rights reserved.
 * 
 * tanming1003<[e-mail]>
 * 
 * 
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * Redistributions of source code must retain the above copyright 
 * notice, this list of conditions and the following disclaimer. 
 * Redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution. 
 * Neither the name of tanming1003 nor the names of its contributors 
 * may be used to endorse or promote products derived from this 
 * software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */
package hunnu.edu.cn.product.common.splitPages;

import java.sql.SQLException;

import javax.sql.RowSet;

/**
 * @author [e-mail]
 * @date 2008-10-13
 * @time 下午12:43:20
 * @project_name Product
 * @package_name hunnu.edu.cn.product.common.splitPages
 * @file_name    RowSetPage.java
 * @version      1.0
 */
public class RowSetPage extends Page
{
    /**
	 * 
	 */
	private static final long serialVersionUID = 29711812787612103L;
	/**
	 * 空页
	 */
	public static final RowSetPage EMPTY_PAGE=new RowSetPage();
	
	private RowSet rs;
	
	/**
	 * 构造一个空页
	 */
	public RowSetPage()
	{
		this(null,0,0);	
	}
	
	/**
	 * 构造一个分页
	 * @param crs        包含一页数据的OracleCachedRowSet 
	 * @param start      该页数据在数据库中的起始位置 
	 * @param totalSize  数据库中包含的记录总数
	 */
	public RowSetPage(RowSet crs,int start,int totalSize)
	{
		this(crs,start,totalSize,Page.DEFAULT_PAGE_SIZE);
	}
	
	/**
	 * 构造一个分页
	 * @param crs        包含一页数据的OracleCachedRowSet
	 * @param start      该页数据在数据库中的起始位置
	 * @param totalSize  数据库中包含的记录总数
	 * @param pageSize   该页的数据大小
	 */
	public RowSetPage(RowSet crs,int start,int totalSize,int pageSize)
	{
		try
		{
			int avaCount=0;
			if(crs!=null)
			{  
				crs.beforeFirst();
				if(crs.next())
				{   
					crs.last();
					avaCount=crs.getRow();
				}
				rs=crs;
				rs.beforeFirst();
				
			}
			super.initPage(start, avaCount, totalSize, pageSize, rs);
		}
		catch(SQLException e)
		{
		    e.printStackTrace();	
		}
	}
	
	/**
	 * 获得该页的记录集
	 * @return 该页的记录集
	 */
	public RowSet getRowSet()
	{
		return this.rs;
	}
	
}