// 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;
import java.rmi.RemoteException;
import java.util.HashMap;
import java.util.Map;
import javax.ejb.CreateException;
import javax.ejb.FinderException;
import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.HiveMind;
import org.apache.tapestry.IPage;
import org.apache.tapestry.IRequestCycle;
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.vlib.VlibPage;
import org.apache.tapestry.vlib.ejb.IOperations;
import org.apache.tapestry.vlib.services.RemoteCallback;
/**
* Edits the properties of at book.
*
* @author Howard Lewis Ship
*/
@Meta("page-type=MyLibrary")
public abstract class EditBook extends VlibPage implements
PageBeginRenderListener
{
public abstract Map getAttributes();
public abstract void setAttributes(Map attributes);
public abstract String getPublisherName();
@Persist("client")
public abstract Integer getBookId();
public abstract void setBookId(Integer bookId);
/**
* Invoked (from {@link MyLibrary}) to begin editting a book. Gets the
* attributes from the {@link org.apache.tapestry.vlib.ejb.IBook} and
* updates the request cycle to render this page,
*/
public void beginEdit(final Integer bookId)
{
setBookId(bookId);
RemoteCallback<Map> callback = new RemoteCallback()
{
public Map doRemote()
throws RemoteException
{
try
{
return getOperations().getBookAttributes(bookId);
}
catch (FinderException ex)
{
throw new ApplicationRuntimeException(ex);
}
}
};
Map attributes = getRemoteTemplate().execute(callback,
"Error setting up page for book #" + bookId + ".");
setAttributes(attributes);
getRequestCycle().activate(this);
}
@Message
public abstract String needPublisherName();
@Message
public abstract String leavePublisherNameEmpty();
@Message
public abstract String updatedBook(Object title);
/**
* Used to update the book when the form is submitted.
*/
public IPage formSubmit(IRequestCycle cycle)
{
final Map attributes = getAttributes();
final Integer publisherId = (Integer) attributes.get("publisherId");
final String publisherName = getPublisherName();
if (publisherId == null && HiveMind.isBlank(publisherName))
{
setErrorField("inputPublisherName", needPublisherName());
return null;
}
if (publisherId != null && HiveMind.isNonBlank(publisherName))
{
setErrorField("inputPublisherName", leavePublisherNameEmpty());
return null;
}
// Check for an error from a validation field
if (isInError()) return null;
final Integer bookId = getBookId();
RemoteCallback callback = new RemoteCallback()
{
public Object doRemote()
throws RemoteException
{
try
{
IOperations operations = getOperations();
if (publisherId != null)
operations.updateBook(bookId, attributes);
else
{
operations
.updateBook(bookId, attributes, publisherName);
}
return null;
}
catch (FinderException ex)
{
throw new ApplicationRuntimeException(ex);
}
catch (CreateException ex)
{
throw new ApplicationRuntimeException(ex);
}
}
};
getRemoteTemplate().execute(callback,
"Error updating book #" + bookId + ".");
getModelSource().clear();
MyLibrary page = (MyLibrary) cycle.getPage("MyLibrary");
page.setMessage(updatedBook(attributes.get("title")));
return page;
}
public void pageBeginRender(PageEvent event)
{
if (getAttributes() == null) setAttributes(new HashMap());
}
}