basketservlet.java

Java写的ERP系统

/******************************************************************************
 * The contents of this file are subject to the   Compiere License  Version 1.1
 * ("License"); You may not use this file except in compliance with the License
 * You may obtain a copy of the License at http://www.compiere.org/license.html
 * Software distributed under the License is distributed on an  "AS IS"  basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * The Original Code is                  Compiere  ERP & CRM  Business Solution
 * The Initial Developer of the Original Code is Jorg Janke  and ComPiere, Inc.
 * Portions created by Jorg Janke are Copyright (C) 1999-2001 Jorg Janke, parts
 * created by ComPiere are Copyright (C) ComPiere, Inc.;   All Rights Reserved.
 * Contributor(s): ______________________________________.
 *****************************************************************************/
package org.compiere.wstore;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.sql.*;
import java.math.*;

import org.apache.ecs.*;
import org.apache.ecs.xhtml.*;
import org.apache.log4j.Logger;

import org.compiere.util.DB;
import org.compiere.util.Env;
import org.compiere.www.*;

/**
 *  Shopping Basket.
 * 	you could add a new line via parameter
 * 	?M_Product_ID=11&Name=aaaaa&Quantity=1&Price=11.11
 * 	if price list found, the price will be potentially overwritten
 *
 *  @author Jorg Janke
 *  @version  $Id: BasketServlet.java,v 1.7 2003/05/04 06:47:27 jjanke Exp $
 */
public class BasketServlet extends HttpServlet
{
	/**	Logging						*/
	private Logger			log = Logger.getLogger(getClass());
	/** Name						*/
	static public final String		NAME = "basketServlet";

	/**
	 *	Initialize global variables
	 *
	 *  @param config Configuration
	 *  @throws ServletException
	 */
	public void init(ServletConfig config)
		throws ServletException
	{
		super.init(config);
		if (!WEnv.initWeb(config))
			throw new ServletException("BasketServlet.init");
	}   //  init

	/**
	 * Get Servlet information
	 * @return Info
	 */
	public String getServletInfo()
	{
		return "Compiere Web Basket";
	}	//	getServletInfo

	/**
	 * Clean up resources
	 */
	public void destroy()
	{
		log.debug("destroy");
	}   //  destroy


	/*************************************************************************/

	/**
	 *  Process the HTTP Get request.
	 *
	 *  @param request request
	 *  @param response response
	 *  @throws ServletException
	 *  @throws IOException
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException
	{
		log.info("doGet from " + request.getRemoteHost() + " - " + request.getRemoteAddr()
			+ " - " + request.getRequestURL());
		Properties ctx = JSPEnv.getCtx(request);
		HttpSession session = request.getSession(true);

		//	Create WebBasket
		WebBasket wb = (WebBasket)session.getAttribute(WebBasket.NAME);
		if (wb == null)
			wb = new WebBasket();
		session.setAttribute(WebBasket.NAME, wb);


		//	Get Price List
		PriceList pl = (PriceList)session.getAttribute(PriceList.NAME);
		if (pl == null)
		{
			log.warn("No Price List in session - " + PriceList.NAME);
			pl = (PriceList)request.getAttribute(PriceList.NAME);
		}
		if (pl == null)
		{
			//	Create Price List
			int AD_Client_ID = Env.getContextAsInt(ctx, "AD_Client_ID");
			int M_PriceList_ID = Env.getContextAsInt(ctx, "M_PriceList_ID");
			pl = PriceList.get(AD_Client_ID, M_PriceList_ID);
		}
		log.debug("- PL=" + pl);

		//	Do we delete?	Delete_x
		deleteLine(request, wb);
		//	Do we add?	Add_x
		addLine(request, pl, wb);

		log.debug("- now - " + wb);
		//	Go back to basket
		String url = "basket.jsp";
		log.info ("doGet - Forward to " + url);
		RequestDispatcher dispatcher = getServletContext ().getRequestDispatcher (url);
		dispatcher.forward (request, response);
	}	//	doGet

	/**
	 * 	Add Line
	 * 	@param request request
	 * 	@param pl price list
	 * 	@param wb web basket
	 */
	private void addLine (HttpServletRequest request, PriceList pl, WebBasket wb)
	{
		//	Get Parameter
		int M_PriceList_ID = WUtil.getParameterAsInt (request, "M_PriceList_ID");
		int M_PriceList_Version_ID = WUtil.getParameterAsInt (request, "M_PriceList_Version_ID");
		wb.setM_PriceList_ID(M_PriceList_ID);
		wb.setM_PriceList_Version_ID(M_PriceList_Version_ID);
		//
		int M_Product_ID = WUtil.getParameterAsInt (request, "M_Product_ID");
		String Name = request.getParameter ("Name");
		String sQuantity = request.getParameter ("Quantity");
		String sPrice = request.getParameter ("Price");

		//	Search for Product ID	Add_134 = Add
		Enumeration en = request.getParameterNames ();
		while (M_Product_ID == 0 && en.hasMoreElements ())
		{
			String parameter = (String)en.nextElement ();
			if (parameter.startsWith ("Add_"))
			{
				if (WUtil.exists (request, parameter)) //	to be sure
				{
					try
					{
						M_Product_ID = Integer.parseInt (parameter.substring (4));
						log.debug ("- found Parameter=" + parameter + " -> " + M_Product_ID);
						if (!WUtil.exists(sQuantity))
							sQuantity = request.getParameter ("Qty_" + M_Product_ID);
						if (!WUtil.exists(sPrice))
							sPrice = request.getParameter("Price_" + M_Product_ID);
						if (!WUtil.exists(Name))
							Name = request.getParameter("Name_" + M_Product_ID);
						log.debug("- found Parameters " + Name + ",Qty=" + sQuantity + ",Price=" + sPrice);
					}
					catch (NumberFormatException ex)
					{
						log.warn ("ParseError for " + parameter + " - " + ex.toString ());
					}
				}
			}
		}
		if (M_Product_ID == 0)
			return;

		//	Get Qty
		BigDecimal Qty = null;
		try
		{
			if (sQuantity != null && sQuantity.length () > 0)
				Qty = new BigDecimal (sQuantity);
		}
		catch (Exception ex1)
		{
		}
		if (Qty == null)
			Qty = WebBasketLine.ONE;

		//	Get Price
		BigDecimal Price = null;
		//	Find info in price list
		if (M_Product_ID != 0 && pl != null)
		{
			ArrayList prices = pl.getPrices ();
			for (int i = 0; i < prices.size (); i++)
			{
				PriceListProduct plp = (PriceListProduct)prices.get (i);
				if (plp.getId () == M_Product_ID)
				{
					Price = plp.getPrice ();
					Name = plp.getName ();
					log.debug ("- found in PL = " + Name + " - " + Price);
					break;
				}
			}
		}
		try //	if not found and as parameter
		{
			if (Price == null && sPrice != null && sPrice.length () > 0)
				Price = new BigDecimal (sPrice);
		}
		catch (Exception ex1)
		{
		}
		if (Price == null)
			Price = WebBasketLine.ONE;

		WebBasketLine wbl = new WebBasketLine (M_Product_ID, Name, Qty,	Price);
		wb.add (wbl);
		log.debug ("- added - " + wbl);
	}	//	addLine

	/**
	 *	Delete Line.
	 *		Delete_x
	 *	@param request request
	 *	@param wb web basket
	 */
	private void deleteLine (HttpServletRequest request, WebBasket wb)
	{
		Enumeration en = request.getParameterNames();
		while (en.hasMoreElements())
		{
			String parameter = (String)en.nextElement();
			if (parameter.startsWith("Delete_"))
			{
				try
				{
					int line = Integer.parseInt (parameter.substring (7));
					log.debug ("- delete parameter=" + parameter + " -> " + line);
					wb.delete(line);
				}
				catch (NumberFormatException ex)
				{
					log.warn("ParseError for " + parameter + " - " + ex.toString());
				}
			}
		}
	}	//	deleteLine


	/**
	 *  Process the HTTP Post request
	 *
	 *  @param request request
	 *  @param response response
	 *  @throws ServletException
	 *  @throws IOException
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException
	{
	//	log.info("doPost from " + request.getRemoteHost() + " - " + request.getRemoteAddr());
		doGet(request, response);
	}
}   //  Basket