/* ====================================================================
* 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
* name, without prior written permission of the Apache Software Foundation.
*
* 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
* DISCLAIMED. IN NO EVENT SHALL THE TAPESTRY CONTRIBUTOR COMMUNITY
* 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 javax.ejb.FinderException;
import org.apache.tapestry.ApplicationRuntimeException;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.vlib.ActivatePage;
import org.apache.tapestry.vlib.IMessageProperty;
import org.apache.tapestry.vlib.VirtualLibraryEngine;
import org.apache.tapestry.vlib.Visit;
import org.apache.tapestry.vlib.components.Browser;
import org.apache.tapestry.vlib.ejb.Book;
import org.apache.tapestry.vlib.ejb.IBookQuery;
import org.apache.tapestry.vlib.ejb.IOperations;
import org.apache.tapestry.vlib.ejb.SortColumn;
import org.apache.tapestry.vlib.ejb.SortOrdering;
/**
* Shows a list of books the user has borrowed.
*
* @author Howard Lewis Ship
* @version $Id: BorrowedBooks.java,v 1.12 2003/05/28 13:41:42 hlship Exp $
*
**/
public abstract class BorrowedBooks extends ActivatePage implements IMessageProperty
{
private Browser _browser;
public abstract void setBorrowedQuery(IBookQuery value);
public abstract IBookQuery getBorrowedQuery();
public abstract SortColumn getSortColumn();
public abstract boolean isDescending();
public void finishLoad()
{
_browser = (Browser) getComponent("browser");
}
public void activate(IRequestCycle cycle)
{
runQuery();
cycle.activate(this);
}
/**
* Invoked as listener method after the sortColumn or
* descending properties are changed.
*
* @param cycle
* @since 3.0
*
*
**/
public void requery(IRequestCycle cycle)
{
runQuery();
}
private void runQuery()
{
Visit visit = (Visit) getVisit();
Integer userPK = visit.getUserId();
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
SortOrdering ordering = new SortOrdering(getSortColumn(), isDescending());
int i = 0;
while (true)
{
try
{
IBookQuery query = getBorrowedQuery();
if (query == null)
{
query = vengine.createNewQuery();
setBorrowedQuery(query);
}
int count = query.borrowerQuery(userPK, ordering);
if (count != _browser.getResultCount())
_browser.initializeForResultCount(count);
break;
}
catch (RemoteException ex)
{
vengine.rmiFailure("Remote exception finding borrowed books.", ex, i++);
setBorrowedQuery(null);
}
}
}
/**
* Listener used to return a book.
*
**/
public void returnBook(IRequestCycle cycle)
{
Object[] parameters = cycle.getServiceParameters();
Integer bookPK = (Integer) parameters[0];
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
IOperations operations = vengine.getOperations();
try
{
Book book = operations.returnBook(bookPK);
setMessage(format("returned-book", book.getTitle()));
runQuery();
}
catch (FinderException ex)
{
setError(format("unable-to-return-book", ex.getMessage()));
return;
}
catch (RemoteException ex)
{
throw new ApplicationRuntimeException(ex);
}
}
}