| // 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 javax.ejb.FinderException; |
| |
| import org.apache.tapestry.ApplicationRuntimeException; |
| 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.ejb.IOperations; |
| |
| /** |
| * Edits the properties of at book. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| **/ |
| |
| public abstract class EditBook extends Protected implements PageRenderListener |
| { |
| public abstract Map getAttributes(); |
| |
| public abstract void setAttributes(Map attributes); |
| |
| public abstract String getPublisherName(); |
| |
| public abstract Integer getBookId(); |
| |
| public abstract void setBookId(Integer bookId); |
| |
| /** |
| * Invoked (from {@link MyLibrary}) to begin editting a book. |
| * Gets the attributes from the {@link org.apache.tapestry.vlib.ejb.IBook} |
| * and updates the request cycle to render this page, |
| * |
| **/ |
| |
| public void beginEdit(IRequestCycle cycle, Integer bookId) |
| { |
| setBookId(bookId); |
| |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine(); |
| |
| int i = 0; |
| while (true) |
| { |
| try |
| { |
| // Get the attributes as a source for our input fields. |
| |
| IOperations operations = vengine.getOperations(); |
| |
| setAttributes(operations.getBookAttributes(bookId)); |
| |
| break; |
| } |
| catch (FinderException ex) |
| { |
| throw new ApplicationRuntimeException(ex); |
| } |
| catch (RemoteException ex) |
| { |
| vengine.rmiFailure( |
| "Remote exception setting up page for book #" + bookId + ".", |
| ex, |
| i++); |
| } |
| } |
| |
| cycle.activate(this); |
| } |
| |
| /** |
| * Used to update the book when the form is submitted. |
| * |
| **/ |
| |
| public void formSubmit(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; |
| } |
| |
| // Check for an error from a validation field |
| |
| if (isInError()) |
| return; |
| |
| // OK, do the update. |
| |
| VirtualLibraryEngine vengine = (VirtualLibraryEngine)cycle.getEngine(); |
| Integer bookId = getBookId(); |
| |
| int i = 0; |
| while (true) |
| { |
| IOperations bean = vengine.getOperations(); |
| |
| try |
| { |
| if (publisherId != null) |
| bean.updateBook(bookId, attributes); |
| else |
| { |
| bean.updateBook(bookId, attributes, publisherName); |
| vengine.clearCache(); |
| } |
| |
| break; |
| } |
| catch (FinderException ex) |
| { |
| throw new ApplicationRuntimeException(ex); |
| } |
| catch (CreateException ex) |
| { |
| throw new ApplicationRuntimeException(ex); |
| } |
| catch (RemoteException ex) |
| { |
| vengine.rmiFailure("Remote exception updating book #" + bookId + ".", ex, i++); |
| |
| continue; |
| } |
| } |
| |
| MyLibrary page = (MyLibrary) cycle.getPage("MyLibrary"); |
| page.setMessage(format("updated-book", attributes.get("title"))); |
| page.activate(cycle); |
| |
| } |
| |
| public void pageBeginRender(PageEvent event) |
| { |
| if (getAttributes() == null) |
| setAttributes(new HashMap()); |
| } |
| |
| } |