package com.jewel.tag.pagination;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.TagSupport;
/**
 * <p>Title: www.entel.com.cn</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: entel</p>
 * @author chendesheng
 * @version 1.0
 */

public class PageInfo extends TagSupport implements PagerInterface {
  protected String offset = "0";
  protected String length = "10";
  public int doStartTag() throws JspException {
    Common comm = new Common((HttpServletRequest) pageContext.getRequest());
    this.setLength(""+comm.pageLength);
    String currentPageCount = ""+comm.offset ;
    int crPage =0;
    if(currentPageCount!=null && !currentPageCount.equalsIgnoreCase("")){
      try{
        crPage = Integer.parseInt(currentPageCount)/comm.pageLength;
        if(Integer.parseInt(currentPageCount)>comm.AllElementCount){
          crPage = 0;
        }
      }catch(Exception e){
        crPage = 0;
      }
    }
    crPage += 1;
    String out = comm.PageInformation(""+crPage);
    write(out);
    return SKIP_BODY;
  }

  private void write(String param) throws JspException {
    try {
      pageContext.getOut().write(param);
    } catch (IOException oe) {
      throw new JspTagException("IOException while writing to the Client: " +
                                oe.getMessage());
    }
  }

  public String getLength() {
    return length;
  }
  public void setLength(String length) {
    this.length = length;
  }
  public void setOffset(String offset) {
    this.offset = offset;
  }
  public String getOffset() {
    return offset;
  }

}