/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation", "Tapestry"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* or "Tapestry", nor may "Apache" or "Tapestry" appear in their
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.tapestry.vlib.pages;
import java.rmi.RemoteException;
import java.text.DateFormat;
import javax.ejb.FinderException;
import org.apache.tapestry.IExternalPage;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.event.PageEvent;
import org.apache.tapestry.event.PageRenderListener;
import org.apache.tapestry.html.BasePage;
import org.apache.tapestry.vlib.VirtualLibraryEngine;
import org.apache.tapestry.vlib.ejb.Book;
import org.apache.tapestry.vlib.ejb.IOperations;
/**
* Shows the details of a book, and allows the user to borrow it.
*
* @author Howard Lewis Ship
* @version $Id: ViewBook.java,v 1.5 2003/04/21 15:39:58 hlship Exp $
*
**/
public abstract class ViewBook extends BasePage implements IExternalPage, PageRenderListener
{
private DateFormat _dateFormat;
public abstract Integer getBookId();
public abstract void setBookId(Integer bookId);
public abstract Book getBook();
public abstract void setBook(Book value);
public void activateExternalPage(Object[] parameters, IRequestCycle cycle)
{
Integer bookId = (Integer) parameters[0];
setBookId(bookId);
}
public void readBook()
{
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
Integer bookId = getBookId();
int i = 0;
while (true)
{
IOperations bean = vengine.getOperations();
try
{
setBook(bean.getBook(bookId));
return;
}
catch (FinderException ex)
{
vengine.presentError("Book not found in database.", getRequestCycle());
return;
}
catch (RemoteException ex)
{
vengine.rmiFailure(
"Remote exception obtaining information for book #" + bookId + ".",
ex,
i++);
}
}
}
public DateFormat getDateFormat()
{
if (_dateFormat == null)
_dateFormat =
DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT, getLocale());
return _dateFormat;
}
public void pageBeginRender(PageEvent event)
{
if (getBook() == null)
readBook();
}
}