// 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;
import java.rmi.RemoteException;
import java.util.HashMap;
import java.util.Map;
import javax.ejb.CreateException;
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.vlib.Protected;
import org.apache.tapestry.vlib.VirtualLibraryEngine;
import org.apache.tapestry.vlib.Visit;
import org.apache.tapestry.vlib.ejb.IOperations;
/**
* Collects information for a new book.
*
* @author Howard Lewis Ship
* @version $Id: NewBook.java,v 1.14 2004/02/19 17:37:48 hlship Exp $
*
**/
public abstract class NewBook extends Protected implements PageRenderListener
{
public abstract Map getAttributes();
public abstract void setAttributes(Map attributes);
public abstract String getPublisherName();
public void addBook(IRequestCycle cycle)
{
Map attributes = getAttributes();
Integer publisherId = (Integer) attributes.get("publisherId");
String publisherName = getPublisherName();
if (publisherId == null && Tapestry.isBlank(publisherName))
{
setErrorField("inputPublisherName", getMessage("need-publisher-name"));
return;
}
if (publisherId != null && Tapestry.isNonBlank(publisherName))
{
setErrorField("inputPublisherName", getMessage("leave-publisher-name-empty"));
return;
}
if (isInError())
return;
Visit visit = (Visit) getVisit();
Integer userId = visit.getUserId();
VirtualLibraryEngine vengine = (VirtualLibraryEngine) cycle.getEngine();
attributes.put("ownerId", userId);
attributes.put("holderId", userId);
int i = 0;
while (true)
{
try
{
IOperations operations = vengine.getOperations();
if (publisherId != null)
operations.addBook(attributes);
else
{
operations.addBook(attributes, publisherName);
// Clear the app's cache of info; in this case, known publishers.
vengine.clearCache();
}
break;
}
catch (CreateException ex)
{
setError("Error adding book: " + ex.getMessage());
return;
}
catch (RemoteException ex)
{
vengine.rmiFailure("Remote exception adding new book.", ex, i++);
}
}
// Success. First, update the message property of the return page.
MyLibrary myLibrary = (MyLibrary) cycle.getPage("MyLibrary");
myLibrary.setMessage(format("added-book", attributes.get("title")));
myLibrary.activate(cycle);
}
public void pageBeginRender(PageEvent event)
{
if (getAttributes() == null)
{
Map attributes = new HashMap();
// Setup defaults for the new book.
attributes.put("lendable", Boolean.TRUE);
setAttributes(attributes);
}
}
}