| /* |
| * Copyright (c) 2015, 2016, 2019, 2020 Eike Stepper (Loehne, 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.cdo.internal.explorer.checkouts; |
| |
| import org.eclipse.emf.cdo.explorer.CDOExplorerUtil; |
| import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout; |
| import org.eclipse.emf.cdo.internal.explorer.bundle.OM; |
| import org.eclipse.emf.cdo.util.CDOUtil; |
| import org.eclipse.emf.cdo.view.AbstractCDOViewProvider; |
| import org.eclipse.emf.cdo.view.CDOView; |
| import org.eclipse.emf.cdo.view.CDOViewSet; |
| |
| import org.eclipse.net4j.util.lifecycle.ILifecycle; |
| import org.eclipse.net4j.util.lifecycle.LifecycleEventAdapter; |
| import org.eclipse.net4j.util.ref.ReferenceMonitor; |
| |
| import org.eclipse.emf.common.notify.Adapter; |
| import org.eclipse.emf.common.notify.Notifier; |
| import org.eclipse.emf.common.notify.impl.AdapterImpl; |
| import org.eclipse.emf.common.util.EList; |
| import org.eclipse.emf.common.util.URI; |
| import org.eclipse.emf.ecore.resource.ResourceSet; |
| import org.eclipse.emf.ecore.util.EcoreUtil; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class CDOCheckoutViewProvider extends AbstractCDOViewProvider |
| { |
| public static final String SCHEME = CDOExplorerUtil.URI_SCHEME; |
| |
| // TODO Move to activator and deactivate via stop(). |
| private static final ReferenceMonitor<ResourceSet> MONITOR = new ReferenceMonitor<ResourceSet>() |
| { |
| @Override |
| protected void work(ResourceSet resourceSet) |
| { |
| disposeResourceSet(resourceSet); |
| } |
| }; |
| |
| public CDOCheckoutViewProvider() |
| { |
| this(DEFAULT_PRIORITY); |
| } |
| |
| public CDOCheckoutViewProvider(int priority) |
| { |
| super("cdo\\.checkout://.*", priority); |
| } |
| |
| @Override |
| public CDOView getView(URI uri, ResourceSet resourceSet) |
| { |
| CDOCheckout checkout = getCheckout(uri); |
| if (checkout != null) |
| { |
| CheckoutViewProviderAdapter adapter = CheckoutViewProviderAdapter.get(resourceSet); |
| if (adapter == null) |
| { |
| adapter = CheckoutViewProviderAdapter.create(resourceSet); |
| |
| MONITOR.activate(); |
| MONITOR.monitor(resourceSet); |
| } |
| |
| return adapter.getView(checkout); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public URI getResourceURI(CDOView view, String path) |
| { |
| CDOCheckout checkout = CDOExplorerUtil.getCheckout(view); |
| if (checkout != null) |
| { |
| return checkout.createResourceURI(path); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public URI getViewURI(URI uri) |
| { |
| if (uri == null) |
| { |
| return null; |
| } |
| |
| String scheme = uri.scheme(); |
| if (scheme == null) |
| { |
| return null; |
| } |
| |
| if (!scheme.equals(SCHEME)) |
| { |
| return null; |
| } |
| |
| return super.getViewURI(uri); |
| } |
| |
| public static void disposeResourceSet(ResourceSet resourceSet) |
| { |
| for (Iterator<Adapter> it = resourceSet.eAdapters().iterator(); it.hasNext();) |
| { |
| Adapter adapter = it.next(); |
| if (adapter.getClass() == CheckoutViewProviderAdapter.class) |
| { |
| it.remove(); |
| break; |
| } |
| } |
| } |
| |
| public static CDOCheckout getCheckout(URI uri) |
| { |
| if (SCHEME.equals(uri.scheme())) |
| { |
| String checkoutID = uri.authority(); |
| return CDOExplorerUtil.getCheckoutManager().getCheckout(checkoutID); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * @author Eike Stepper |
| */ |
| private static final class CheckoutViewProviderAdapter extends AdapterImpl |
| { |
| private final Map<CDOCheckout, CDOView> views = new HashMap<>(); |
| |
| private CheckoutViewProviderAdapter() |
| { |
| } |
| |
| public CDOView getView(final CDOCheckout checkout) |
| { |
| synchronized (views) |
| { |
| CDOView view = views.get(checkout); |
| if (view == null) |
| { |
| ResourceSet resourceSet = getTarget(); |
| CDOViewSet viewSet = CDOUtil.getViewSet(resourceSet); |
| if (viewSet != null) |
| { |
| for (CDOView viewSetView : viewSet.getViews()) |
| { |
| if (checkout == CDOExplorerUtil.getCheckout(viewSetView)) |
| { |
| view = viewSetView; |
| break; |
| } |
| } |
| } |
| |
| if (view == null) |
| { |
| view = checkout.openView(resourceSet); |
| } |
| |
| if (view != null) |
| { |
| views.put(checkout, view); |
| |
| view.addListener(new LifecycleEventAdapter() |
| { |
| @Override |
| protected void onDeactivated(ILifecycle lifecycle) |
| { |
| synchronized (views) |
| { |
| views.remove(checkout); |
| } |
| } |
| }); |
| } |
| } |
| |
| return view; |
| } |
| } |
| |
| @Override |
| public boolean isAdapterForType(Object type) |
| { |
| return type == CheckoutViewProviderAdapter.class; |
| } |
| |
| @Override |
| public ResourceSet getTarget() |
| { |
| return (ResourceSet)super.getTarget(); |
| } |
| |
| @Override |
| public void setTarget(Notifier newTarget) |
| { |
| ResourceSet resourceSet = getTarget(); |
| if (newTarget == resourceSet) |
| { |
| return; |
| } |
| |
| if (newTarget == null) |
| { |
| CDOView[] array; |
| synchronized (views) |
| { |
| array = views.values().toArray(new CDOView[views.size()]); |
| views.clear(); |
| } |
| |
| for (CDOView view : array) |
| { |
| try |
| { |
| view.close(); |
| } |
| catch (Exception ex) |
| { |
| OM.LOG.error(ex); |
| } |
| } |
| } |
| else if (resourceSet != null) |
| { |
| throw new IllegalStateException("Illegal attempt to retarget CheckoutViewProviderAdapter to " + newTarget); |
| } |
| |
| super.setTarget(newTarget); |
| } |
| |
| public static CheckoutViewProviderAdapter get(ResourceSet resourceSet) |
| { |
| EList<Adapter> adapters = resourceSet.eAdapters(); |
| |
| CheckoutViewProviderAdapter adapter = (CheckoutViewProviderAdapter)EcoreUtil.getAdapter(adapters, CheckoutViewProviderAdapter.class); |
| if (adapter != null && adapter.getTarget() != resourceSet) |
| { |
| adapters.remove(adapter); |
| adapter = null; |
| } |
| |
| return adapter; |
| } |
| |
| public static CheckoutViewProviderAdapter create(ResourceSet resourceSet) |
| { |
| CheckoutViewProviderAdapter adapter = new CheckoutViewProviderAdapter(); |
| resourceSet.eAdapters().add(adapter); |
| return adapter; |
| } |
| } |
| } |