| /* |
| * Copyright (c) 2010-2012, 2015 Eike Stepper (Berlin, Germany) and others. |
| * 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.spi.cdo; |
| |
| import org.eclipse.emf.cdo.CDOObject; |
| import org.eclipse.emf.cdo.view.CDOAdapterPolicy; |
| import org.eclipse.emf.cdo.view.CDOView; |
| |
| import org.eclipse.emf.common.notify.Adapter; |
| import org.eclipse.emf.common.notify.impl.AdapterImpl; |
| import org.eclipse.emf.common.util.EList; |
| import org.eclipse.emf.ecore.EObject; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * If the meaning of this type isn't clear, there really should be more of a description here... |
| * |
| * @author Eike Stepper |
| * @since 4.0 |
| * @noextend This interface is not intended to be extended by clients. |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| */ |
| public class CDOChangeSubscriptionAdapter extends AdapterImpl |
| { |
| private CDOView view; |
| |
| private CDOAdapterPolicy policy = new CDOAdapterPolicy() |
| { |
| public boolean isValid(EObject eObject, Adapter adapter) |
| { |
| return adapter == CDOChangeSubscriptionAdapter.this; |
| } |
| }; |
| |
| private Set<CDOObject> notifiers = new HashSet<CDOObject>(); |
| |
| public CDOChangeSubscriptionAdapter(CDOView view) |
| { |
| this.view = view; |
| view.options().addChangeSubscriptionPolicy(policy); |
| } |
| |
| public void dispose() |
| { |
| reset(); |
| view.options().removeChangeSubscriptionPolicy(policy); |
| view = null; |
| } |
| |
| public CDOView getView() |
| { |
| return view; |
| } |
| |
| public Set<CDOObject> getNotifiers() |
| { |
| return notifiers; |
| } |
| |
| public void attach(CDOObject notifier) |
| { |
| if (notifiers.add(notifier)) |
| { |
| notifier.eAdapters().add(this); |
| } |
| } |
| |
| public void reset() |
| { |
| for (CDOObject notifier : notifiers) |
| { |
| try |
| { |
| if (notifier != null) |
| { |
| EList<Adapter> adapters = notifier.eAdapters(); |
| if (adapters != null) |
| { |
| adapters.remove(this); |
| } |
| } |
| } |
| catch (Exception ex) |
| { |
| //$FALL-THROUGH$ |
| } |
| } |
| |
| notifiers.clear(); |
| } |
| } |