Package oss.ngocminh.lego.service

Source Code of oss.ngocminh.lego.service.CartUpdate

package oss.ngocminh.lego.service;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import oss.ngocminh.lego.data.Entity;

/**
* Servlet implementation class CartUpdate
*/
public class CartUpdate extends AbstractController {
  private static final long serialVersionUID = 1L;

    /**
     * Default constructor.
     */
    public CartUpdate() {
    }

  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    List<Entity> orders = (List<Entity>) request.getSession().getAttribute("orders");
    String action = request.getParameter("action");
    if ("clear".equals(action)) {
      orders.clear();
    } else if ("update".equals(action)) {
      for (int i = orders.size()-1; i >= 0; i--) {
        String quantityStr = request.getParameter("quantity" + i);
        int quantity = Integer.parseInt(quantityStr);
        if (quantity <= 0) {
          orders.remove(i);
        } else {
          Entity order = orders.get(i);
          order.put("quantity", quantity);
        }
      }
    } else if (action.startsWith("delete")) {
      int productId = Integer.parseInt(action.substring(6));
      for (int i = orders.size()-1; i >= 0; i--) {
        if (orders.get(i).get("product_id").equals(productId)) {
          orders.remove(i);
        }
      }
    }
    redirect("cart_view", response);
  }

}
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