| /******************************************************************************* |
| * Copyright (c) 2000, 2006 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.core.variants; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.resources.IWorkspaceRunnable; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.team.core.TeamException; |
| |
| /** |
| * A resource variant tree that caches and obtains its bytes from the remote slot |
| * in a three-way synchronizer. Clients must subclass to provide remote resource |
| * variant refresh functionality. |
| * |
| * @see ThreeWaySubscriber |
| * |
| * @since 3.0 |
| */ |
| public abstract class ThreeWayRemoteTree extends ResourceVariantTree { |
| |
| private ThreeWaySubscriber subscriber; |
| |
| /* |
| * A resource variant byte store that accesses the remote bytes |
| * from a three-way synchronizer. Both access and modification |
| * are supported. |
| */ |
| static class RemoteResourceVariantByteStore extends ResourceVariantByteStore { |
| private ThreeWaySynchronizer synchronizer; |
| public RemoteResourceVariantByteStore(ThreeWaySynchronizer synchronizer) { |
| this.synchronizer = synchronizer; |
| } |
| public void dispose() { |
| // Nothing to do as contents are owned by the TargetSynchronizer |
| } |
| public byte[] getBytes(IResource resource) throws TeamException { |
| return getSynchronizer().getRemoteBytes(resource); |
| } |
| public boolean setBytes(IResource resource, byte[] bytes) throws TeamException { |
| return getSynchronizer().setRemoteBytes(resource, bytes); |
| } |
| public boolean flushBytes(IResource resource, int depth) throws TeamException { |
| // This method is invoked when the remote bytes are stale and should be removed |
| // This is handled by the ThreeWaySynchronizer so nothing needs to be done here. |
| return false; |
| } |
| public boolean isVariantKnown(IResource resource) throws TeamException { |
| return getSynchronizer().hasSyncBytes(resource); |
| } |
| public boolean deleteBytes(IResource resource) throws TeamException { |
| return getSynchronizer().removeRemoteBytes(resource); |
| } |
| public IResource[] members(IResource resource) throws TeamException { |
| return synchronizer.members(resource); |
| } |
| private ThreeWaySynchronizer getSynchronizer() { |
| return synchronizer; |
| } |
| } |
| |
| /** |
| * Create a remote resource variant tree that stores and obtains |
| * it's bytes from the remote slot of the synchronizer of the |
| * given subscriber |
| * @param subscriber a three-way subscriber |
| */ |
| public ThreeWayRemoteTree(ThreeWaySubscriber subscriber) { |
| super(new RemoteResourceVariantByteStore(subscriber.getSynchronizer())); |
| this.subscriber = subscriber; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.internal.core.subscribers.caches.IResourceVariantTree#roots() |
| */ |
| public IResource[] roots() { |
| return getSubscriber().roots(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.internal.core.subscribers.caches.IResourceVariantTree#getResourceVariant(org.eclipse.core.resources.IResource) |
| */ |
| public IResourceVariant getResourceVariant(IResource resource) throws TeamException { |
| return getSubscriber().getResourceVariant(resource, getByteStore().getBytes(resource)); |
| } |
| |
| /** |
| * Return the subscriber associated with this resource variant tree. |
| * @return the subscriber associated with this resource variant tree |
| */ |
| protected ThreeWaySubscriber getSubscriber() { |
| return subscriber; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.team.core.variants.AbstractResourceVariantTree#collectChanges(org.eclipse.core.resources.IResource, org.eclipse.team.core.variants.IResourceVariant, int, org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| protected IResource[] collectChanges(final IResource local, |
| final IResourceVariant remote, final int depth, IProgressMonitor monitor) |
| throws TeamException { |
| final IResource[][] resources = new IResource[][] { null }; |
| getSubscriber().getSynchronizer().run(local, new IWorkspaceRunnable() { |
| public void run(IProgressMonitor monitor) throws CoreException { |
| resources[0] = ThreeWayRemoteTree.super.collectChanges(local, remote, depth, monitor); |
| } |
| }, monitor); |
| return resources[0]; |
| } |
| } |