// 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 org.apache.hivemind.ApplicationRuntimeException;
import org.apache.hivemind.HiveMind;
import org.apache.tapestry.annotations.InjectComponent;
import org.apache.tapestry.annotations.InjectPage;
import org.apache.tapestry.annotations.Message;
import org.apache.tapestry.event.PageBeginRenderListener;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.valid.IValidationDelegate;
import org.apache.tapestry.vlib.Visit;
import org.apache.tapestry.vlib.VlibPage;
import org.apache.tapestry.vlib.ejb.IOperations;
import org.apache.tapestry.vlib.services.RemoteCallback;
/**
* Collects information for a new book.
*
* @author Howard Lewis Ship
*/
public abstract class NewBook extends VlibPage implements
PageBeginRenderListener
{
public abstract Map getAttributes();
public abstract void setAttributes(Map attributes);
public abstract String getPublisherName();
@Message
public abstract String needPublisherName();
@Message
public abstract String leavePublisherNameEmpty();
@Message
public abstract String addedBook(Object title);
@InjectComponent("publisherName")
public abstract IFormComponent getPublisherNameField();
@InjectPage("MyLibrary")
public abstract MyLibrary getMyLibrary();
public void addBook()
{
IValidationDelegate delegate = getValidationDelegate();
final Map attributes = getAttributes();
final Integer publisherId = (Integer) attributes.get("publisherId");
final String publisherName = getPublisherName();
if (publisherId == null && HiveMind.isBlank(publisherName))
{
delegate.record(getPublisherNameField(), needPublisherName());
return;
}
if (publisherId != null && HiveMind.isNonBlank(publisherName))
{
delegate.record(getPublisherNameField(), leavePublisherNameEmpty());
return;
}
if (isInError()) return;
Visit visit = getVisitState();
Integer userId = visit.getUserId();
attributes.put("ownerId", userId);
attributes.put("holderId", userId);
RemoteCallback<Boolean> callback = new RemoteCallback()
{
public Boolean doRemote()
throws RemoteException
{
IOperations operations = getOperations();
try
{
if (publisherId != null)
{
operations.addBook(attributes);
return false;
}
operations.addBook(attributes, publisherName);
return true;
}
catch (CreateException ex)
{
throw new ApplicationRuntimeException(ex);
}
}
};
boolean clearCache = getRemoteTemplate().execute(callback,
"Error adding new book.");
if (clearCache) getModelSource().clear();
// Success. First, update the message property of the return page.
MyLibrary myLibrary = getMyLibrary();
myLibrary.setMessage(addedBook(attributes.get("title")));
myLibrary.activate();
}
public void pageBeginRender(PageEvent event)
{
if (getAttributes() == null)
{
Map attributes = new HashMap();
// Setup defaults for the new book.
attributes.put("lendable", true);
setAttributes(attributes);
}
}
}