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27
33 package olstore.session;
34
35 import java.util.ArrayList;
36 import java.util.Collection;
37 import java.util.Date;
38 import java.util.HashMap;
39 import java.util.Iterator;
40 import java.util.Set;
41 import java.math.BigDecimal;
42
43 import javax.ejb.SessionBean;
44
45 import olstore.dto.ShoppingCartItem;
46 import olstore.framework.EJBHomeFactory;
47
48 import olstore.entity.ItemLocal;
49 import olstore.entity.ItemLocalHome;
50 import olstore.entity.OrderLocalHome;
51 import olstore.entity.UserLocal;
52
53
59
65
67
68
101
102 public abstract class ShoppingCartBean implements SessionBean {
103 private UserLocal customer;
104 private HashMap cart;
105 private javax.ejb.SessionContext ejbContext;
106 private javax.naming.Context initialContext;
107
108
109
114
115 public void ejbCreate(olstore.entity.UserLocal user){
116 customer = user;
117 cart = new HashMap();
118 }
119
120
127
128 public olstore.entity.UserLocal getUser(){
129 return customer;
130 }
131
132
141 private void addItemToCart(Integer itemPK, Integer quantity){
142 ItemLocal item = null;
143 Integer qty;
144
145 if(quantity.intValue() <= 0){
146
147 throw new NumberFormatException("Quantity must be greater than 0:");
148 }
149 try{
150 EJBHomeFactory factory = EJBHomeFactory.getInstance();
151 ItemLocalHome home = (ItemLocalHome) factory.getLocalHome(EJBHomeFactory.ITEM);
152 item = home.findByPrimaryKey(itemPK);
153 if((qty = (Integer)cart.get(item))!=null){
154 cart.remove(item);
155 }
156 cart.put(item, quantity);
157
158 }catch(Exception e){
159 throw new javax.ejb.EJBException("Could not add item "
160 + item , e);
161 }
162 }
163
164 private BigDecimal recalculateTotal(){
165 Iterator it = cart.keySet().iterator();
166 BigDecimal totalCost = new BigDecimal(0.00f);
167
168 while(it.hasNext())
169 totalCost = totalCost.add(getCostForItem(((ItemLocal) it.next()).getItemId()));
170 return totalCost;
171 }
172
173
181
182 public Integer getQuantity(Integer itemPK){
183 ItemLocal item = null;
184
185 try{
186 EJBHomeFactory factory = EJBHomeFactory.getInstance();
187 ItemLocalHome home = (ItemLocalHome)factory.getLocalHome (EJBHomeFactory.ITEM);
188 item = home.findByPrimaryKey(itemPK);
189 return ((Integer) cart.get(item));
190 }catch(Exception e){
191 throw new javax.ejb.EJBException("Could not get the quantity for item"
192 + item , e);
193 }
194
195 }
196
197
205
206 private void removeItemFromCart(Integer itemPK, Integer quantity){
207 ItemLocal item = null;
208 try{
209 EJBHomeFactory factory = EJBHomeFactory.getInstance();
210 ItemLocalHome home = (ItemLocalHome)factory.getLocalHome (EJBHomeFactory.ITEM);
211 item = home.findByPrimaryKey(itemPK);
212 cart.remove(item);
213 cart.put(item, quantity);
214 }catch(Exception e){
215 throw new javax.ejb.EJBException("Could not remove item "
216 + item , e);
217 }
218
219 }
220
221
229
230 public void removeItemFromCart(Integer itemPK){
231 ItemLocal item = null;
232 try{
233 EJBHomeFactory factory = EJBHomeFactory.getInstance();
234 ItemLocalHome home = (ItemLocalHome)factory.getLocalHome (EJBHomeFactory.ITEM);
235 item = home.findByPrimaryKey(itemPK);
236 cart.remove(item);
237 }catch(Exception e){
238 throw new javax.ejb.EJBException("Could not remove item "
239 + item , e);
240
241 }
242 }
243
244
253
254 public void updateQuantity(Integer itemPK, Integer quantity){
255 ItemLocal item = null;
256 if(quantity.intValue() <= 0){
257
258 throw new NumberFormatException("Quantity must be greater than 0:");
259 }
260
261 try{
262 EJBHomeFactory factory = EJBHomeFactory.getInstance();
263 ItemLocalHome home = (ItemLocalHome)factory.getLocalHome (EJBHomeFactory.ITEM);
264 item = home.findByPrimaryKey(itemPK);
265 int orig = 0; Integer origInt;
266 if((origInt = ((Integer) (cart.get(item))))!=null)
267 orig = ((Integer) (cart.get(item))).intValue();
268 if(orig < quantity.intValue())
269 addItemToCart(itemPK, quantity);
270 else
271 removeItemFromCart(itemPK, quantity);
272
273
274 }catch(Exception e){
275 throw new javax.ejb.EJBException("Could not update item "
276 + item , e);
277
278 }
279 }
280
281
290
291 public boolean contains(Integer itemPK){
292 ItemLocal item = null;
293 try{
294 EJBHomeFactory factory = EJBHomeFactory.getInstance();
295 ItemLocalHome home = (ItemLocalHome)factory.getLocalHome (EJBHomeFactory.ITEM);
296 item = home.findByPrimaryKey(itemPK);
297 return cart.containsKey(item);
298 }catch(Exception e){
299 throw new javax.ejb.EJBException("Could not find item "
300 + itemPK , e);
301 }
302 }
303
304
311
312 public Integer listNumOfItems(){
313 return new Integer(cart.size());
314 }
315
316
324
325 public BigDecimal getTotalCost(){
326
327 return recalculateTotal();
328
329 }
330
331
339
340 public Collection getItemsInCart(){
341 return cart.keySet();
342
343 }
344
345
346
351
352 public void createOrders(){
353 ItemLocal item = null;
354 String DATE_FORMAT = "yyyy-MM-dd";
355 Date date = new Date();
356 java.text.SimpleDateFormat sdf =
357 new java.text.SimpleDateFormat(DATE_FORMAT);
358 String strdate = sdf.format(date);
359
360 try{
361 Set items = cart.keySet();
362 EJBHomeFactory factory = EJBHomeFactory.getInstance();
363 OrderLocalHome orderHome = (OrderLocalHome)factory.getLocalHome (EJBHomeFactory.ORDER);
364 Iterator it = items.iterator();
365
366 Collection purchased = customer.getPurchased();
367 while(it.hasNext())
368 {
369 item = ((ItemLocal) it.next());
370 olstore.entity.OrderLocal order = orderHome.create(customer,
371 item, (Integer)(cart.get(item)), new String("Ordered"),
372 strdate, getCostForItem(item.getItemId()));
373 if(!purchased.contains(item)){
374 purchased.add(item);
375 }
376 }
377
378 customer.setPurchased(purchased);
379 clearContents();
380 }catch(Exception e){
381 throw new javax.ejb.EJBException("Could not add item "
382 + item , e);
383 }
384 }
385
386 private void clearContents(){
387 cart.clear();
388 }
389
390
394 public ArrayList shoppingCartToDTOs(){
395 Iterator itemIterator = getItemsInCart().iterator();
396 ArrayList cartEntries = new ArrayList();
397 while(itemIterator.hasNext()){
398 ItemLocal currItemLocal = (ItemLocal)itemIterator.next();
399 ShoppingCartItem cartItem = new ShoppingCartItem(currItemLocal);
400 cartItem.setQuantity(getQuantity(cartItem.getItemId()).toString());
401 cartItem.setPrice(getCostForItem(cartItem.getItemId()));
402 cartEntries.add(cartItem);
403 }
404
405 return cartEntries;
406 }
407
408
409
415 public void DTOsToShoppingCart(ArrayList cartEntries){
416 Iterator entriesIterator = cartEntries.iterator();
417 while(entriesIterator.hasNext()){
418 ShoppingCartItem cartItem = (ShoppingCartItem) entriesIterator.next();
419
420 if(Integer.parseInt(cartItem.getQuantity())==0)
421 removeItemFromCart(cartItem.getItemId());
422 else
423 updateQuantity(cartItem.getItemId(), new Integer(cartItem.getQuantity()));
424 }
425
426 recalculateTotal();
427 }
428
429
430
431
435
436 public BigDecimal getCostForItem(Integer itemPK){
437 ItemLocal item = null;
438 try{
439 EJBHomeFactory factory = EJBHomeFactory.getInstance();
440 ItemLocalHome home = (ItemLocalHome)factory.getLocalHome (EJBHomeFactory.ITEM);
441 item = home.findByPrimaryKey(itemPK);
442 return (item.getPrice().multiply(new BigDecimal(((Integer) cart.get(item)).toString())));
443 }catch(Exception e){
444 throw new javax.ejb.EJBException("Could not find item "
445 + itemPK , e);
446 }
447
448
449 }
450
451 public void ejbRemove(){
452 }
453
454 public void ejbActivate(){
455 }
456
457 public void ejbPassivate(){
458 }
459
460 public void setSessionContext(javax.ejb.SessionContext cntx){
461 ejbContext = cntx;
462 try{
463 initialContext = new javax.naming.InitialContext();
464 }catch(javax.naming.NamingException ne){
465 throw new javax.ejb.EJBException(ne);
466 }
467 }
468 }
469
470
471 |
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