itemactions.java

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/*
 * @author                        : Sujatha
 * @Version                       : 1.0
 *
 * Development Environment        : Oracle9i JDeveloper
 * Name of the File               : ItemActions.java
 * Creation/Modification History  :
 *
 * Sujatha   16-Jan-2003      Created
 *
 */
package oracle.otnsamples.vsm.actions.owner;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;

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

import oracle.otnsamples.util.MessageCache;
import oracle.otnsamples.util.ServiceLocator;
import oracle.otnsamples.vsm.actions.forms.ItemForm;
import oracle.otnsamples.vsm.services.Administration;
import oracle.otnsamples.vsm.services.AdministrationHome;
import oracle.otnsamples.vsm.services.CategoryException;
import oracle.otnsamples.vsm.services.ItemException;
import oracle.otnsamples.vsm.services.ShopOwner;
import oracle.otnsamples.vsm.services.ShopOwnerHome;
import oracle.otnsamples.vsm.services.data.Category;
import oracle.otnsamples.vsm.services.data.Item;
import oracle.otnsamples.vsm.services.data.Shop;
import oracle.otnsamples.vsm.services.data.SubCategory;

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;
import org.apache.struts.upload.FormFile;


/**
 * This action class is used to manage - add/ update/ delete item information.
 * 
 * @author Sujatha
 * @version 1.0
 */
public class ItemActions extends DispatchAction {
  /**
   * This is the action called from the Struts framework to get the list of
   * subcategories associated with the given shop. These subcategories will be
   * listed in the add item form
   *
   * @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 addItemForm(
                                   ActionMapping mapping, ActionForm form,
                                   HttpServletRequest request,
                                   HttpServletResponse response)
                            throws IOException, 
                                   ServletException {

    ShopOwnerHome shopHome = null;
    ShopOwner shopBean     = null;
    ActionForward forward  = mapping.findForward("addItemForm");
    ItemForm item          = (ItemForm) form;

    try {

      String langID = request.getLocale().getLanguage();
      shopHome =
        (ShopOwnerHome) ServiceLocator.getLocator().getService("ShopOwner");
      shopBean = shopHome.create();

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

      if(shopID != null) {

        SubCategory[] subCategories = shopBean.getSubCategories(shopID, langID);
        request.setAttribute("subcategories", subCategories);
      }
    } catch(CategoryException ex) {
      servlet.log("AddItemFormError", ex);                            
      ActionErrors errors = new ActionErrors();
      errors.add("ItemError", new ActionError("common.error", ex.getMessage()));
      saveErrors(request, errors);

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

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

      try {

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

    return forward;
  }
  /**
   * This is the action called from the Struts framework to add an item to a
   * shop
   *
   * @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 addItem(
                               ActionMapping mapping, ActionForm form,
                               HttpServletRequest request,
                               HttpServletResponse response)
                        throws IOException, 
                               ServletException {

    ShopOwnerHome shopHome       = null;
    ShopOwner shopBean           = null;
    AdministrationHome adminHome = null;
    Administration adminBean     = null;
    Category category            = null;
    Shop shop                    = null;
    ItemForm item                = (ItemForm) form;
    ActionForward forward        = mapping.findForward("displayItemAttr");
    String langID                = request.getLocale().getLanguage();
    String shopID                =
      (String) request.getSession().getAttribute("shopID");

    try {
      shopHome =
        (ShopOwnerHome) ServiceLocator.getLocator().getService("ShopOwner");
      shopBean = shopHome.create();

      // Upload the image for the item, if specified
      FormFile imageFile = item.getImage();

      if(imageFile.getFileName() != null &&
           !"".equals(imageFile.getFileName())) {

        String uploadDir =
          servlet.getServletConfig().getInitParameter("UploadDir");

        java.net.URL url     =
          servlet.getServletContext().getResource(uploadDir);
        FileOutputStream out =
          new FileOutputStream(url.getFile() + File.separator +
                               imageFile.getFileName());
        out.write(imageFile.getFileData());
      }

      // Construct an item value object and call item service bean for item addition
      String itemID =
        shopBean.addItem(new Item(
                                  null, item.getName(), item.getDesc(),
                                  item.getSubCatID(), shopID,
                                  Double.parseDouble(item.getUnitPrice()),
                                  Integer.parseInt(item.getQuantity()),
                                  Integer.parseInt(item.getReorderLevel()),
                                  Integer.parseInt(item.getReorderQty()),
                                  imageFile.getFileName(), langID, null));

      /* Get the list of attributes associated with the item category to be
         displayed in the item attributes addition form */
      shop        = shopBean.getShopDetails(shopID, langID);
      adminHome =
        (AdministrationHome) ServiceLocator.getLocator().getService("Administration");
      adminBean   = adminHome.create();
      category    = adminBean.findCategory(shop.getCategoryId(), langID);
      request.setAttribute("categoryAttr", category.getAttributes());

      // Add the newly added item's ID to the request scope
      request.setAttribute("itemID", itemID);

    } catch(ItemException ex) {
      servlet.log("AddItemError", ex);                                
      request.setAttribute(
                           "message",
                           MessageCache.getMessage(
                                                   ex.getMessageCode(),
                                                   getLocale(request)));
      forward = mapping.findForward("addItemForm");

      try {

        SubCategory[] subCategories = shopBean.getSubCategories(shopID, langID);
        request.setAttribute("subcategories", subCategories);
      } catch(CategoryException cex) {
        servlet.log("AddItemError", ex);                                
        forward = mapping.findForward("error");
      }
    } catch(Exception ex) {
      servlet.log("AddItemError", ex);                                
      ActionErrors errors = new ActionErrors();
      errors.add("ItemError", new ActionError("common.error", ex.getMessage()));
      saveErrors(request, errors);

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

      try {

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

    return forward;
  }
  /**
   * This is the action called from the Struts framework to add item attributes
   *
   * @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 addItemAttr(
                                   ActionMapping mapping, ActionForm form,
                                   HttpServletRequest request,
                                   HttpServletResponse response)
                            throws IOException, 
                                   ServletException {

    ShopOwnerHome shopHome = null;
    ShopOwner shopBean     = null;
    ActionForward forward  = mapping.findForward("success");

    try {

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

      // Get all user parameters from the request
      Enumeration names = request.getParameterNames();
      String paramName  = null;
      Map attributes    = new HashMap();

      /* Retrieve attribute labels and attribute values from the request object
         and add them to a Map */
      while(names.hasMoreElements()) {
        paramName = (String) names.nextElement();

        if(
           !paramName.equalsIgnoreCase("itemID") &&
             !paramName.equalsIgnoreCase("command")) {
          attributes.put(paramName, request.getParameter(paramName));
        }
      }

      // Construct an item value object with the attributes information
      Item item =
        new Item(
                 request.getParameter("itemID"), null, null, null, null, 0.0, 0,
                 0, 0, null, langID, attributes);
      shopHome =
        (ShopOwnerHome) ServiceLocator.getLocator().getService("ShopOwner");
      shopBean = shopHome.create();
      shopBean.addItemAttributes(item);
      request.setAttribute(
                           "message",
                           MessageCache.getMessage(
                                                   "message.additem.success",
                                                   getLocale(request)));

    } catch(ItemException ex) {
      servlet.log("AddItemAttributeError", ex);                                
      ActionErrors errors = new ActionErrors();
      errors.add("ItemError", new ActionError("common.error", ex.getMessage()));
      saveErrors(request, errors);

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

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

      try {

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

    return forward;