displayordersaction.java

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/*
 * @author                        : Sujatha
 * @Version                       : 1.0
 *
 * Development Environment        : Oracle9i JDeveloper
 * Name of the File               : DisplayOrdersAction.java
 * Creation/Modification History  :
 *
 * Sujatha   14-Jan-2003      Created
 *
 */
package oracle.otnsamples.vsm.actions.orders;


// IO and servlet API
import java.io.IOException;

import java.util.HashMap;
import java.util.List;

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

import oracle.otnsamples.util.ServiceLocator;
import oracle.otnsamples.vsm.services.OrderException;
import oracle.otnsamples.vsm.services.OrderManagement;
import oracle.otnsamples.vsm.services.OrderManagementHome;
import oracle.otnsamples.vsm.services.data.Order;
import oracle.otnsamples.vsm.services.data.OrderDetail;

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;


/**
 * This Action class is used to list orders information placed by a user.
 * 
 * @author Sujatha
 * @version 1.0
 */
public class DisplayOrdersAction extends DispatchAction {
  /**
   * This is the action called from the Struts framework to get the list of
   * latest three orders for a given user with the complete information about
   * the most recent order
   *
   * @param mapping The ActionMapping used to select this instance.
   * @param form The optional ActionForm bean for this request.
   * @param request The HTTP Request we are processing.
   * @param response The HTTP Response we are processing.
   */
  public ActionForward display(
                               ActionMapping mapping, ActionForm form,
                               HttpServletRequest request,
                               HttpServletResponse response)
                               throws IOException, ServletException {

    OrderManagementHome orderHome = null;
    OrderManagement orderBean     = null;
    Order[] orders                = null;
    Order[] latestOrder           = new Order[ 1 ];
    ActionForward forward         = mapping.findForward("display");

    try {
      orderHome =
        (OrderManagementHome) ServiceLocator.getLocator().getService("OrderManagement");
      orderBean = orderHome.create();

      String userName = (String) request.getSession().getAttribute("userName");

      // Get the latest three orders for the user and put the same in request scope
      orders = orderBean.getLatestOrdersForUser(userName, 3);
      request.setAttribute("orders", orders);

      /* If an order has been specified, get information about it, else fetch
         information about the most recent order for user */
      if(request.getParameter("orderID") != null) {
        latestOrder [ 0 ] =
          orderBean.getOrder((String) request.getParameter("orderID"));
      } else {
        latestOrder = orderBean.getLatestOrdersForUser(userName, 1);
      }

      request.setAttribute("latestOrder", latestOrder);

      // More each of the order items in the above order, get the item information
      HashMap itemInfo = new HashMap();
      List ordersList  = null;

      if(latestOrder != null && latestOrder.length > 0) {
        ordersList = latestOrder [ 0 ].getOrderDetail();

        String itemID = null;
        String langID = request.getLocale().getLanguage();

        for(int i = 0; i < ordersList.size(); i++) {
          itemID = ((OrderDetail) ordersList.get(i)).getItemID();
          itemInfo.put(itemID, orderBean.getItemName(itemID, langID));
        }

        request.setAttribute("itemInfo", itemInfo);
      }
    } catch(OrderException ex) {
      servlet.log("DisplayOrdersError", ex);                            
      ActionErrors errors = new ActionErrors();
      errors.add(
                 "OrderError", new ActionError("common.error", ex.getMessage()));
      saveErrors(request, errors);

      return mapping.findForward("error");
    } catch(Exception ex) {
      servlet.log("DisplayOrdersError", ex);                            
      ActionErrors errors = new ActionErrors();
      errors.add(
                 "OrderError", new ActionError("common.error", ex.getMessage()));
      saveErrors(request, errors);

      return mapping.findForward("error");
    } finally {

      try {

        if(orderBean != null) {
          orderBean.remove();
        }
      } catch(Exception ex) {
      }
    }

    return forward;
  }
  /**
   * This is the action called from the Struts framework to get the list of all
   * orders placed by a given user
   *
   * @param mapping The ActionMapping used to select this instance.
   * @param form The optional ActionForm bean for this request.
   * @param request The HTTP Request we are processing.
   * @param response The HTTP Response we are processing.
   */
  public ActionForward allOrders(
                                 ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response)
                                 throws IOException, ServletException {

    OrderManagementHome orderHome = null;
    OrderManagement orderBean     = null;
    Order[] orders                = null;
    ActionForward forward         = mapping.findForward("displayAll");

    try {
      orderHome =
        (OrderManagementHome) ServiceLocator.getLocator().getService("OrderManagement");
      orderBean   = orderHome.create();
      orders =
        orderBean.getOrdersForUser((String) request.getSession().getAttribute("userName"));
      request.setAttribute("orders", orders);

      if(orders != null) {

        double[] orderAmount = new double[ orders.length ];
        double amount = 0.0;
        List ordersList = null;
        OrderDetail orderInfo = null;

        for(int i = 0; i < orders.length; i++) {
          ordersList = orders [ i ].getOrderDetail();

          for(int j = 0; j < ordersList.size(); j++) {
            orderInfo = (OrderDetail) ordersList.get(j);
            amount += orderInfo.getQuantity() * orderInfo.getUnitPrice();
          }

          orderAmount [ i ]   = amount;
          amount              = 0.0;
          ordersList.clear();
        }

        request.setAttribute("orderTotal", orderAmount);
      }
    } catch(OrderException ex) {
      servlet.log("DisplayAllOrdersError", ex);                                
      ActionErrors errors = new ActionErrors();
      errors.add(
                 "ProfileError",
                 new ActionError("common.error", ex.getMessage()));
      saveErrors(request, errors);
    } catch(Exception ex) {
      servlet.log("DisplayAllOrdersError", ex);                                
      forward = mapping.findForward("error");
    } finally {
      try {

        if(orderBean != null) {
          orderBean.remove();
        }
      } catch(Exception ex) {
      }
    }
    return forward;
  }
}