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/*
* Copyright (c) 2011-2013 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.cdo.internal.explorer.checkouts;
import org.eclipse.emf.cdo.explorer.CDOExplorerUtil;
import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout;
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.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 org.eclipse.core.runtime.Path;
import java.util.HashMap;
import java.util.Map;
/**
* @author Eike Stepper
*/
public class CDOCheckoutViewProvider extends AbstractCDOViewProvider
{
public static final String SCHEME = "cdo.checkout";
// 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);
}
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 super.getResourceURI(view, path);
}
@Override
public String getPath(URI uri)
{
return new Path(uri.path()).makeAbsolute().removeFirstSegments(1).toString();
}
@Override
public URI getViewURI(URI uri)
{
return URI.createHierarchicalURI(uri.scheme(), uri.authority(), null, uri.query(), null);
}
public static void disposeResourceSet(ResourceSet resourceSet)
{
CheckoutViewProviderAdapter adapter = CheckoutViewProviderAdapter.get(resourceSet);
if (adapter != null)
{
adapter.dispose();
}
}
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<CDOCheckout, CDOView>();
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();
}
public void dispose()
{
CDOView[] array;
synchronized (views)
{
array = views.values().toArray(new CDOView[views.size()]);
views.clear();
}
for (CDOView view : array)
{
view.close();
}
ResourceSet resourceSet = getTarget();
resourceSet.eAdapters().remove(this);
}
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;
}
}
}
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