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1
15 package org.apache.tapestry.vlib.pages.admin;
16
17 import java.rmi.RemoteException  ;
18 import java.util.List ;
19
20 import javax.ejb.FinderException ;
21
22 import org.apache.hivemind.ApplicationRuntimeException;
23 import org.apache.tapestry.IRequestCycle;
24 import org.apache.tapestry.Tapestry;
25 import org.apache.tapestry.event.PageEvent;
26 import org.apache.tapestry.event.PageRenderListener;
27 import org.apache.tapestry.form.IPropertySelectionModel;
28 import org.apache.tapestry.vlib.AdminPage;
29 import org.apache.tapestry.vlib.EntitySelectionModel;
30 import org.apache.tapestry.vlib.IErrorProperty;
31 import org.apache.tapestry.vlib.IMessageProperty;
32 import org.apache.tapestry.vlib.VirtualLibraryEngine;
33 import org.apache.tapestry.vlib.ejb.Book;
34 import org.apache.tapestry.vlib.ejb.IBookQuery;
35 import org.apache.tapestry.vlib.ejb.IOperations;
36 import org.apache.tapestry.vlib.ejb.Person;
37
38
47
48 public abstract class TransferBooksTransfer extends AdminPage implements PageRenderListener
49 {
50 public abstract Person getFromUser();
51
52 public abstract void setFromUser(Person fromUser);
53
54 public abstract Integer getFromUserId();
55
56 public abstract void setFromUserId(Integer fromUserId);
57
58 public abstract Integer getToUserId();
59
60 public abstract void setToUserId(Integer toUserId);
61
62 public abstract Person getToUser();
63
64 public abstract void setToUser(Person toUser);
65
66 public abstract List getSelectedBooks();
67
68 public abstract IPropertySelectionModel getUserBookModel();
69
70 public abstract void setUserBookModel(IPropertySelectionModel userBookModel);
71
72 public void activate(IRequestCycle cycle, Integer fromUserId, Integer toUserId)
73 {
74 Person fromUser = readPerson(fromUserId);
75
76 IPropertySelectionModel model = buildUserBookModel(fromUser);
77
78 if (model.getOptionCount() == 0)
79 {
80 IErrorProperty page = (IErrorProperty) cycle.getPage();
81 page.setError(format("user-has-no-books", fromUser.getNaturalName()));
82 return;
83 }
84
85 setFromUserId(fromUserId);
86 setFromUser(fromUser);
87
88 setToUserId(toUserId);
89
90 setUserBookModel(model);
91
92 cycle.activate(this);
93 }
94
95
101
102 public void pageBeginRender(PageEvent event)
103 {
104 Person fromUser = getFromUser();
105
106 if (fromUser == null)
107 {
108 fromUser = readPerson(getFromUserId());
109 setFromUser(fromUser);
110 }
111
112 if (getUserBookModel() == null)
113 setUserBookModel(buildUserBookModel(fromUser));
114
115 Person toUser = getToUser();
116 if (toUser == null)
117 {
118 toUser = readPerson(getToUserId());
119 setToUser(toUser);
120 }
121 }
122
123 public void formSubmit(IRequestCycle cycle)
124 {
125 List selectedBooks = getSelectedBooks();
126
127 int count = Tapestry.size(selectedBooks);
128
129 if (count == 0)
130 {
131 setError(getMessage("no-books-selected"));
132 return;
133 }
134
135 Integer [] keys = (Integer []) selectedBooks.toArray(new Integer [count]);
136 Person toUser = getToUser();
137
138 VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
139
140 int i = 0;
141 while (true)
142 {
143 try
144 {
145 IOperations operations = vengine.getOperations();
146
147 operations.transferBooks(toUser.getId(), keys);
148
149 break;
150 }
151 catch (FinderException ex)
152 {
153 throw new ApplicationRuntimeException(ex);
154 }
155 catch (RemoteException ex)
156 {
157 vengine.rmiFailure("Unable to transfer ownership of books.", ex, i++);
158 }
159 }
160
161 Person fromUser = getFromUser();
162 IMessageProperty selectPage = (TransferBooksSelect) cycle.getPage("TransferBooksSelect");
163 selectPage.setMessage(
164 format(
165 "transfered-books",
166 Integer.toString(count),
167 fromUser.getNaturalName(),
168 toUser.getNaturalName()));
169 cycle.activate(selectPage);
170 }
171
172 private IPropertySelectionModel buildUserBookModel(Person user)
173 {
174 VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
175 Book[] books = null;
176
177 int i = 0;
178 while (true)
179 {
180 books = null;
181
182 try
183 {
184 IBookQuery query = vengine.createNewQuery();
185
186 int count = query.ownerQuery(user.getId(), null);
187
188 if (count > 0)
189 books = query.get(0, count);
190
191 break;
192 }
193 catch (RemoteException ex)
194 {
195 vengine.rmiFailure(
196 "Unable to retrieve books owned by " + user.getNaturalName() + ".",
197 ex,
198 i++);
199 }
200 }
201
202 EntitySelectionModel model = new EntitySelectionModel();
203
204 if (books != null)
205 for (i = 0; i < books.length; i++)
206 model.add(books[i].getId(), books[i].getTitle());
207
208 return model;
209 }
210
211 private Person readPerson(Integer personId)
212 {
213 VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
214
215 return vengine.readPerson(personId);
216 }
217 }
218 |
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