package xin.glue.ui.common.blob;

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;

import jxl.Workbook;
import jxl.write.WritableWorkbook;

import com.posdata.glue.dao.vo.PosRowSet;

public class PosExcelStream extends PosBolbManager {
	public PosExcelStream(HttpServletRequest request,
			HttpServletResponse response, JspWriter out, PageContext pageContext) {
		super(request, response, out, pageContext);
	}

	public void setContext(OutputStream os) throws Exception {
		PosRowSet rowSet = (PosRowSet)dataList.get(0);
		if (rowSet == null || !rowSet.hasNext()) return;
		InputStream in = (InputStream)rowSet.next().getAttribute("BLOBFILE");
		if (in == null) return;

		WritableWorkbook wb = Workbook.createWorkbook(os,
				Workbook.getWorkbook(new BufferedInputStream(new GZIPInputStream(in))));
		wb.write();
		wb.close();
		in.close();
	}
}