// 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 javax.ejb.RemoveException;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.PageRedirectException;
import org.apache.tapestry.Tapestry;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.event.PageRenderListener;
import org.apache.tapestry.form.ListEditMap;
import org.apache.tapestry.vlib.AdminPage;
import org.apache.tapestry.vlib.VirtualLibraryEngine;
import org.apache.tapestry.vlib.ejb.IOperations;
import org.apache.tapestry.vlib.ejb.Publisher;
/**
* Allows editting of the publishers in the database, including deleting
* publishers (which can be dangerous if any books are linked to the publisher).
*
* @author Howard Lewis Ship
* @version $Id: EditPublishers.java,v 1.10 2004/04/30 15:17:21 hlship Exp $
*
**/
public abstract class EditPublishers extends AdminPage implements PageRenderListener
{
public abstract ListEditMap getListEditMap();
public abstract void setListEditMap(ListEditMap listEditMap);
public abstract Publisher getPublisher();
public abstract void setPublisher(Publisher publisher);
public void synchronizePublisher(IRequestCycle cycle)
{
ListEditMap map = getListEditMap();
Publisher publisher = (Publisher) map.getValue();
if (publisher == null)
{
setError(getMessage("out-of-date"));
throw new PageRedirectException(this);
}
setPublisher(publisher);
}
/**
* Reads all publishers from the database, building the list
* of publisher ids, and the map from id to Publisher.
* Also, sets the deletedPublisherIds property to an empty set.
*
**/
private void readPublishers()
{
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
Publisher[] publishers = null;
int i = 0;
while (true)
{
try
{
IOperations operations = vengine.getOperations();
publishers = operations.getPublishers();
break;
}
catch (RemoteException ex)
{
vengine.rmiFailure(getMessage("read-failure"), ex, i++);
}
}
ListEditMap map = new ListEditMap();
int count = Tapestry.size(publishers);
for (i = 0; i < count; i++)
map.add(publishers[i].getId(), publishers[i]);
setListEditMap(map);
}
public void processForm(IRequestCycle cycle)
{
if (isInError())
return;
ListEditMap map = getListEditMap();
List updateList = map.getValues();
List deletedIds = map.getDeletedKeys();
Publisher[] updated = (Publisher[]) updateList.toArray(new Publisher[updateList.size()]);
Integer[] deleted =
deletedIds == null
? null
: (Integer[]) deletedIds.toArray(new Integer[deletedIds.size()]);
// Now, push the updates through to the database
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
int i = 0;
while (true)
{
try
{
IOperations operations = vengine.getOperations();
operations.updatePublishers(updated, deleted);
break;
}
catch (FinderException ex)
{
throw new ApplicationRuntimeException(ex);
}
catch (RemoveException ex)
{
throw new ApplicationRuntimeException(ex);
}
catch (RemoteException ex)
{
vengine.rmiFailure(getMessage("update-failure"), ex, i++);
}
}
// Clear any cached info about publishers.
vengine.clearCache();
}
public void pageBeginRender(PageEvent event)
{
readPublishers();
}
}