| /******************************************************************************* |
| * Copyright (c) 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.TreeChangeEvent; |
| import org.eclipse.jpt.utility.model.listener.TreeChangeListener; |
| import org.eclipse.jpt.utility.model.value.CollectionValueModel; |
| import org.eclipse.jpt.utility.model.value.ListValueModel; |
| |
| /** |
| * Extend ItemAspectListValueModelAdapter to listen to one or more tree |
| * aspects of each item in the wrapped list model. |
| */ |
| public class ItemTreeListValueModelAdapter<E> |
| extends ItemAspectListValueModelAdapter<E> |
| { |
| |
| /** The names of the items' tree that we listen to. */ |
| protected final String[] treeNames; |
| |
| /** Listener that listens to all the items in the list. */ |
| protected final TreeChangeListener itemTreeListener; |
| |
| |
| // ********** constructors ********** |
| |
| /** |
| * Construct an adapter for the specified item trees. |
| */ |
| public ItemTreeListValueModelAdapter(ListValueModel<E> listHolder, String... treeNames) { |
| super(listHolder); |
| this.treeNames = treeNames; |
| this.itemTreeListener = this.buildItemTreeListener(); |
| } |
| |
| /** |
| * Construct an adapter for the specified item trees. |
| */ |
| public ItemTreeListValueModelAdapter(CollectionValueModel<E> collectionHolder, String... treeNames) { |
| this(new CollectionListValueModelAdapter<E>(collectionHolder), treeNames); |
| } |
| |
| |
| // ********** initialization ********** |
| |
| /** |
| * All we really care about is the fact that a tree aspect has |
| * changed. Do the same thing no matter which event occurs. |
| */ |
| protected TreeChangeListener buildItemTreeListener() { |
| return new TreeChangeListener() { |
| public void nodeAdded(TreeChangeEvent event) { |
| ItemTreeListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| public void nodeRemoved(TreeChangeEvent event) { |
| ItemTreeListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| public void treeCleared(TreeChangeEvent event) { |
| ItemTreeListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| public void treeChanged(TreeChangeEvent event) { |
| ItemTreeListValueModelAdapter.this.itemAspectChanged(event); |
| } |
| @Override |
| public String toString() { |
| return "item tree listener: " + Arrays.asList(ItemTreeListValueModelAdapter.this.treeNames); |
| } |
| }; |
| } |
| |
| |
| // ********** behavior ********** |
| |
| @Override |
| protected void startListeningToItem(Model item) { |
| for (String treeName : this.treeNames) { |
| item.addTreeChangeListener(treeName, this.itemTreeListener); |
| } |
| } |
| |
| @Override |
| protected void stopListeningToItem(Model item) { |
| for (String treeName : this.treeNames) { |
| item.removeTreeChangeListener(treeName, this.itemTreeListener); |
| } |
| } |
| |
| } |