| // 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 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.components.Browser; |
| import org.apache.tapestry.vlib.ejb.IBookQuery; |
| import org.apache.tapestry.vlib.ejb.Person; |
| import org.apache.tapestry.vlib.ejb.SortColumn; |
| import org.apache.tapestry.vlib.ejb.SortOrdering; |
| |
| /** |
| * Displays the book inventory list for a single {@link org.apache.tapestry.vlib.ejb.IPerson}, showing |
| * what books are owned by the person, who has them borrowed, etc. If the |
| * user is logged in, then books can be borrowed from this page as well. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * |
| **/ |
| |
| public abstract class ViewPerson extends BasePage implements IExternalPage, PageRenderListener |
| { |
| public abstract Integer getPersonId(); |
| |
| public abstract void setPersonId(Integer personId); |
| |
| public abstract void setPerson(Person value); |
| |
| public abstract Person getPerson(); |
| |
| public abstract IBookQuery getQuery(); |
| |
| public abstract void setQuery(IBookQuery value); |
| |
| public abstract SortColumn getSortColumn(); |
| |
| public abstract boolean isDescending(); |
| |
| private Browser _browser; |
| |
| public void finishLoad() |
| { |
| _browser = (Browser) getComponent("browser"); |
| } |
| |
| /** |
| * Invoked by the external service to being viewing the |
| * identified person. |
| * |
| **/ |
| |
| public void activateExternalPage(Object[] parameters, IRequestCycle cycle) |
| { |
| Integer personId = (Integer) parameters[0]; |
| |
| setPersonId(personId); |
| |
| // Force the query to be re-run when the person changes. |
| |
| int count = runQuery(); |
| |
| _browser.initializeForResultCount(count); |
| } |
| |
| public void requery(IRequestCycle cycle) |
| { |
| int count = runQuery(); |
| |
| if (_browser.getResultCount() != count) |
| _browser.setResultCount(count); |
| } |
| |
| private int runQuery() |
| { |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine(); |
| Integer personId = getPersonId(); |
| |
| SortOrdering ordering = new SortOrdering(getSortColumn(), isDescending()); |
| |
| int i = 0; |
| while (true) |
| { |
| IBookQuery query = getQuery(); |
| |
| if (query == null) |
| { |
| query = vengine.createNewQuery(); |
| |
| setQuery(query); |
| } |
| |
| try |
| { |
| return query.ownerQuery(personId, ordering); |
| } |
| catch (RemoteException ex) |
| { |
| vengine.rmiFailure("Remote exception for owner query.", ex, i++); |
| |
| setQuery(null); |
| } |
| } |
| |
| } |
| |
| public void pageBeginRender(PageEvent event) |
| { |
| Person person = getPerson(); |
| |
| if (person == null) |
| { |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine(); |
| |
| person = vengine.readPerson(getPersonId()); |
| |
| setPerson(person); |
| } |
| } |
| |
| } |