| /******************************************************************************* |
| * Copyright (c) 2007, 2008 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.utility.internal.model.value; |
| |
| import java.util.Arrays; |
| import org.eclipse.jpt.utility.model.Model; |
| import org.eclipse.jpt.utility.model.event.CollectionChangeEvent; |
| import org.eclipse.jpt.utility.model.listener.CollectionChangeListener; |
| import org.eclipse.jpt.utility.model.value.CollectionValueModel; |
| import org.eclipse.jpt.utility.model.value.ListValueModel; |
| |
| /** |
| * Extend ItemAspectListValueModelAdapter to listen to one or more collection |
| * aspects of each item in the wrapped list model. |
| */ |
| public class ItemCollectionListValueModelAdapter<E> |
| extends ItemAspectListValueModelAdapter<E> |
| { |
| |
| /** The names of the items' collections that we listen to. */ |
| protected final String[] collectionNames; |
| |
| /** Listener that listens to all the items in the list. */ |
| protected final CollectionChangeListener itemCollectionListener; |
| |
| |
| // ********** constructors ********** |
| |
| /** |
| * Construct an adapter for the specified item Collections. |
| */ |
| public ItemCollectionListValueModelAdapter(ListValueModel<E> listHolder, String... collectionNames) { |
| super(listHolder); |
| this.collectionNames = collectionNames; |
| this.itemCollectionListener = this.buildItemCollectionListener(); |
| } |
| |
| /** |
| * Construct an adapter for the specified item Collections. |
| */ |
| public ItemCollectionListValueModelAdapter(CollectionValueModel<E> collectionHolder, String... collectionNames) { |
| this(new CollectionListValueModelAdapter<E>(collectionHolder), collectionNames); |
| } |
| |
| |
| // ********** initialization ********** |
| |
| /** |
| * All we really care about is the fact that a Collection aspect has |
| * changed. Do the same thing no matter which event occurs. |
| */ |
| protected CollectionChangeListener buildItemCollectionListener() { |
| return new CollectionChangeListener() { |
| public void itemsAdded(CollectionChangeEvent event) { |
| ItemCollectionListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| public void itemsRemoved(CollectionChangeEvent event) { |
| ItemCollectionListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| public void collectionCleared(CollectionChangeEvent event) { |
| ItemCollectionListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| public void collectionChanged(CollectionChangeEvent event) { |
| ItemCollectionListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| @Override |
| public String toString() { |
| return "item collection listener: " + Arrays.asList(ItemCollectionListValueModelAdapter.this.collectionNames); |
| } |
| }; |
| } |
| |
| |
| // ********** behavior ********** |
| |
| @Override |
| protected void startListeningToItem(Model item) { |
| for (String collectionName : this.collectionNames) { |
| item.addCollectionChangeListener(collectionName, this.itemCollectionListener); |
| } |
| } |
| |
| @Override |
| protected void stopListeningToItem(Model item) { |
| for (String collectionName : this.collectionNames) { |
| item.removeCollectionChangeListener(collectionName, this.itemCollectionListener); |
| } |
| } |
| |
| } |