// Copyright 2004, 2005 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.hivemind.ApplicationRuntimeException;
import org.apache.tapestry.IPage;
import org.apache.tapestry.annotations.Bean;
import org.apache.tapestry.annotations.InjectPage;
import org.apache.tapestry.annotations.Message;
import org.apache.tapestry.annotations.Meta;
import org.apache.tapestry.annotations.Persist;
import org.apache.tapestry.event.PageBeginRenderListener;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.form.IPropertySelectionModel;
import org.apache.tapestry.valid.IValidationDelegate;
import org.apache.tapestry.vlib.AdminPage;
import org.apache.tapestry.vlib.EntitySelectionModel;
import org.apache.tapestry.vlib.IErrorProperty;
import org.apache.tapestry.vlib.VirtualLibraryDelegate;
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
* @since 3.0
*/
@Meta("page-type=TransferBooks")
public abstract class TransferBooksTransfer extends AdminPage implements PageBeginRenderListener
{
public abstract Person getFromUser();
public abstract void setFromUser(Person fromUser);
@Persist("client")
public abstract Integer getFromUserId();
public abstract void setFromUserId(Integer fromUserId);
@Persist("client")
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);
@Bean(VirtualLibraryDelegate.class)
public abstract IValidationDelegate getValidationDelegate();
@Message
public abstract String userHasNoBooks(String userName);
@InjectPage("TransferBooksSelect")
public abstract TransferBooksSelect getSelectPage();
@Message
public abstract String transferedBooks(int count, String fromName, String toName);
public void activate(Integer fromUserId, Integer toUserId)
{
Person fromUser = readPerson(fromUserId);
IPropertySelectionModel model = buildUserBookModel(fromUser);
if (model.getOptionCount() == 0)
{
IErrorProperty page = getSelectPage();
page.setError(userHasNoBooks(fromUser.getNaturalName()));
return;
}
setFromUserId(fromUserId);
setFromUser(fromUser);
setToUserId(toUserId);
setUserBookModel(model);
getRequestCycle().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 IPage formSubmit()
{
List selectedBooks = getSelectedBooks();
Integer[] keys = (Integer[]) selectedBooks.toArray(new Integer[0]);
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();
TransferBooksSelect selectPage = getSelectPage();
selectPage.setMessage(transferedBooks(keys.length, fromUser.getNaturalName(), toUser
.getNaturalName()));
return 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);
}
}