| /* |
| * Copyright (c) 2008 Borland Software Corporation. |
| * 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: |
| * Artem Tikhomirov (Borland) - initial API and implementation |
| */ |
| package org.eclipse.gmf.graphdef.editor.sheet; |
| |
| import org.eclipse.emf.common.notify.Notification; |
| import org.eclipse.emf.common.notify.Notifier; |
| import org.eclipse.emf.common.notify.impl.AdapterImpl; |
| import org.eclipse.emf.ecore.EClass; |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.EStructuralFeature; |
| |
| /** |
| * Mediator to filter specific changes of the object it is attached to. |
| * |
| * Note, this tracker dispatches notification only when attached to a target |
| * EObject which is compatible with features being tracked (feature's owning |
| * meta-class should be the same or superclass of target's meta-class. |
| * |
| * @author artem |
| */ |
| public final class FeatureTracker extends AdapterImpl { |
| private final EStructuralFeature[] myFeatures; |
| private final ChangeTracker myListener; |
| |
| public FeatureTracker(ChangeTracker listener, EStructuralFeature... features) { |
| assert listener != null && features != null; |
| myListener = listener; |
| myFeatures = features; |
| } |
| |
| @Override |
| public void setTarget(Notifier newTarget) { |
| if (newTarget instanceof EObject) { |
| EClass metaClass = ((EObject) newTarget).eClass(); |
| for (EStructuralFeature sf : myFeatures) { |
| if (sf.getEContainingClass().isSuperTypeOf(metaClass)) { |
| super.setTarget(newTarget); |
| break; |
| } |
| } |
| return; |
| } |
| super.setTarget(newTarget); |
| } |
| |
| @Override |
| public void notifyChanged(Notification msg) { |
| if (msg.isTouch()) { |
| return; |
| } |
| for (EStructuralFeature sf : myFeatures) { |
| if (sf.equals(msg.getFeature())) { |
| myListener.modelChanged(msg); |
| break; |
| } |
| } |
| } |
| } |