| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.vlib.pages.admin; |
| |
| import java.rmi.RemoteException; |
| import java.util.List; |
| |
| import javax.ejb.FinderException; |
| |
| import org.apache.tapestry.ApplicationRuntimeException; |
| import org.apache.tapestry.IRequestCycle; |
| import org.apache.tapestry.Tapestry; |
| import org.apache.tapestry.event.PageEvent; |
| import org.apache.tapestry.event.PageRenderListener; |
| import org.apache.tapestry.form.IPropertySelectionModel; |
| import org.apache.tapestry.vlib.AdminPage; |
| import org.apache.tapestry.vlib.EntitySelectionModel; |
| import org.apache.tapestry.vlib.IErrorProperty; |
| import org.apache.tapestry.vlib.IMessageProperty; |
| import org.apache.tapestry.vlib.VirtualLibraryEngine; |
| import org.apache.tapestry.vlib.ejb.Book; |
| import org.apache.tapestry.vlib.ejb.IBookQuery; |
| import org.apache.tapestry.vlib.ejb.IOperations; |
| import org.apache.tapestry.vlib.ejb.Person; |
| |
| /** |
| * Second page in Transfer Books wizard; allows the books owned by the |
| * from user to be selected and transfered to the target user. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 3.0 |
| * |
| **/ |
| |
| public abstract class TransferBooksTransfer extends AdminPage implements PageRenderListener |
| { |
| public abstract Person getFromUser(); |
| |
| public abstract void setFromUser(Person fromUser); |
| |
| public abstract Integer getFromUserId(); |
| |
| public abstract void setFromUserId(Integer fromUserId); |
| |
| public abstract Integer getToUserId(); |
| |
| public abstract void setToUserId(Integer toUserId); |
| |
| public abstract Person getToUser(); |
| |
| public abstract void setToUser(Person toUser); |
| |
| public abstract List getSelectedBooks(); |
| |
| public abstract IPropertySelectionModel getUserBookModel(); |
| |
| public abstract void setUserBookModel(IPropertySelectionModel userBookModel); |
| |
| public void activate(IRequestCycle cycle, Integer fromUserId, Integer toUserId) |
| { |
| Person fromUser = readPerson(fromUserId); |
| |
| IPropertySelectionModel model = buildUserBookModel(fromUser); |
| |
| if (model.getOptionCount() == 0) |
| { |
| IErrorProperty page = (IErrorProperty) cycle.getPage(); |
| page.setError(format("user-has-no-books", fromUser.getNaturalName())); |
| return; |
| } |
| |
| setFromUserId(fromUserId); |
| setFromUser(fromUser); |
| |
| setToUserId(toUserId); |
| |
| setUserBookModel(model); |
| |
| cycle.activate(this); |
| } |
| |
| /** |
| * Only properties toUserPK and fromUserPK are persistent. We need to refresh |
| * the fromUser, toUser and userBookModel properties at the start |
| * of each request cycle. |
| * |
| **/ |
| |
| public void pageBeginRender(PageEvent event) |
| { |
| Person fromUser = getFromUser(); |
| |
| if (fromUser == null) |
| { |
| fromUser = readPerson(getFromUserId()); |
| setFromUser(fromUser); |
| } |
| |
| if (getUserBookModel() == null) |
| setUserBookModel(buildUserBookModel(fromUser)); |
| |
| Person toUser = getToUser(); |
| if (toUser == null) |
| { |
| toUser = readPerson(getToUserId()); |
| setToUser(toUser); |
| } |
| } |
| |
| public void formSubmit(IRequestCycle cycle) |
| { |
| List selectedBooks = getSelectedBooks(); |
| |
| int count = Tapestry.size(selectedBooks); |
| |
| if (count == 0) |
| { |
| setError(getMessage("no-books-selected")); |
| return; |
| } |
| |
| Integer[] keys = (Integer[]) selectedBooks.toArray(new Integer[count]); |
| Person toUser = getToUser(); |
| |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine(); |
| |
| int i = 0; |
| while (true) |
| { |
| try |
| { |
| IOperations operations = vengine.getOperations(); |
| |
| operations.transferBooks(toUser.getId(), keys); |
| |
| break; |
| } |
| catch (FinderException ex) |
| { |
| throw new ApplicationRuntimeException(ex); |
| } |
| catch (RemoteException ex) |
| { |
| vengine.rmiFailure("Unable to transfer ownership of books.", ex, i++); |
| } |
| } |
| |
| Person fromUser = getFromUser(); |
| IMessageProperty selectPage = (TransferBooksSelect) cycle.getPage("TransferBooksSelect"); |
| selectPage.setMessage( |
| format( |
| "transfered-books", |
| Integer.toString(count), |
| fromUser.getNaturalName(), |
| toUser.getNaturalName())); |
| cycle.activate(selectPage); |
| } |
| |
| private IPropertySelectionModel buildUserBookModel(Person user) |
| { |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine(); |
| Book[] books = null; |
| |
| int i = 0; |
| while (true) |
| { |
| books = null; |
| |
| try |
| { |
| IBookQuery query = vengine.createNewQuery(); |
| |
| int count = query.ownerQuery(user.getId(), null); |
| |
| if (count > 0) |
| books = query.get(0, count); |
| |
| break; |
| } |
| catch (RemoteException ex) |
| { |
| vengine.rmiFailure( |
| "Unable to retrieve books owned by " + user.getNaturalName() + ".", |
| ex, |
| i++); |
| } |
| } |
| |
| EntitySelectionModel model = new EntitySelectionModel(); |
| |
| if (books != null) |
| for (i = 0; i < books.length; i++) |
| model.add(books[i].getId(), books[i].getTitle()); |
| |
| return model; |
| } |
| |
| private Person readPerson(Integer personId) |
| { |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine(); |
| |
| return vengine.readPerson(personId); |
| } |
| } |