| /******************************************************************************* |
| * Copyright (c) 2007, 2012 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.common.utility.internal.model.value; |
| |
| import java.util.Arrays; |
| |
| import org.eclipse.jpt.common.utility.model.Model; |
| import org.eclipse.jpt.common.utility.model.event.CollectionAddEvent; |
| import org.eclipse.jpt.common.utility.model.event.CollectionChangeEvent; |
| import org.eclipse.jpt.common.utility.model.event.CollectionClearEvent; |
| import org.eclipse.jpt.common.utility.model.event.CollectionRemoveEvent; |
| import org.eclipse.jpt.common.utility.model.listener.CollectionChangeListener; |
| import org.eclipse.jpt.common.utility.model.value.ModifiablePropertyValueModel; |
| |
| /** |
| * Extend {@link ValueAspectAdapter} to listen to one or more collection |
| * aspects of the value in the wrapped value model. |
| */ |
| public class ValueCollectionAdapter<V extends Model> |
| extends ValueAspectAdapter<V> |
| { |
| /** The names of the value's collections that we listen to. */ |
| protected final String[] collectionNames; |
| |
| /** Listener that listens to the value. */ |
| protected final CollectionChangeListener valueCollectionListener; |
| |
| |
| // ********** constructors ********** |
| |
| /** |
| * Construct an adapter for the specified value collections. |
| */ |
| public ValueCollectionAdapter(ModifiablePropertyValueModel<V> valueHolder, String... collectionNames) { |
| super(valueHolder); |
| this.collectionNames = collectionNames; |
| this.valueCollectionListener = this.buildValueCollectionListener(); |
| } |
| |
| |
| // ********** initialization ********** |
| |
| protected CollectionChangeListener buildValueCollectionListener() { |
| return new CollectionChangeListener() { |
| public void itemsAdded(CollectionAddEvent event) { |
| ValueCollectionAdapter.this.itemsAdded(event); |
| } |
| public void itemsRemoved(CollectionRemoveEvent event) { |
| ValueCollectionAdapter.this.itemsRemoved(event); |
| } |
| public void collectionCleared(CollectionClearEvent event) { |
| ValueCollectionAdapter.this.collectionCleared(event); |
| } |
| public void collectionChanged(CollectionChangeEvent event) { |
| ValueCollectionAdapter.this.collectionChanged(event); |
| } |
| @Override |
| public String toString() { |
| return "value collection listener: " + Arrays.asList(ValueCollectionAdapter.this.collectionNames); //$NON-NLS-1$ |
| } |
| }; |
| } |
| |
| |
| // ********** ValueAspectAdapter implementation ********** |
| |
| @Override |
| protected void engageValue_() { |
| for (String collectionName : this.collectionNames) { |
| this.value.addCollectionChangeListener(collectionName, this.valueCollectionListener); |
| } |
| } |
| |
| @Override |
| protected void disengageValue_() { |
| for (String collectionName : this.collectionNames) { |
| this.value.removeCollectionChangeListener(collectionName, this.valueCollectionListener); |
| } |
| } |
| |
| |
| // ********** change events ********** |
| |
| protected void itemsAdded(@SuppressWarnings("unused") CollectionAddEvent event) { |
| this.valueAspectChanged(); |
| } |
| |
| protected void itemsRemoved(@SuppressWarnings("unused") CollectionRemoveEvent event) { |
| this.valueAspectChanged(); |
| } |
| |
| protected void collectionCleared(@SuppressWarnings("unused") CollectionClearEvent event) { |
| this.valueAspectChanged(); |
| } |
| |
| protected void collectionChanged(@SuppressWarnings("unused") CollectionChangeEvent event) { |
| this.valueAspectChanged(); |
| } |
| |
| } |