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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.core.subscribers;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.core.variants.IResourceVariant;
import org.eclipse.team.core.variants.ResourceVariantByteStore;
import org.eclipse.team.core.variants.ResourceVariantTree;
import org.eclipse.team.core.variants.ThreeWaySubscriber;
/**
* Allow access to the base resource variants but do not support refresh
* or modification.
*/
public final class ThreeWayBaseTree extends ResourceVariantTree {
private ThreeWaySubscriber subscriber;
/*
* A resource variant byte store that accesses the base bytes from a three-way
* synchronizer. The modification methods are disabled as the base should
* only be modified in the synchronizer directly.
*/
static class BaseResourceVariantByteStore extends ResourceVariantByteStore {
private ThreeWaySubscriber subscriber;
public BaseResourceVariantByteStore(ThreeWaySubscriber subscriber) {
this.subscriber = subscriber;
}
public void dispose() {
// Nothing to do
}
public byte[] getBytes(IResource resource) throws TeamException {
return subscriber.getSynchronizer().getBaseBytes(resource);
}
public boolean setBytes(IResource resource, byte[] bytes) throws TeamException {
// Base bytes are set directly in the synchronizer
return false;
}
public boolean flushBytes(IResource resource, int depth) throws TeamException {
// Base bytes are flushed directly in the synchronizer
return false;
}
public boolean deleteBytes(IResource resource) throws TeamException {
// Base bytes are deleted directly in the synchronizer
return false;
}
public IResource[] members(IResource resource) throws TeamException {
return subscriber.getSynchronizer().members(resource);
}
}
/**
* Create a base resource variant tree that accesses the base bytes
* from a three-way synchronizer.
* @param subscriber the three-way subscriber
*/
public ThreeWayBaseTree(ThreeWaySubscriber subscriber) {
super(new BaseResourceVariantByteStore(subscriber));
this.subscriber = subscriber;
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.core.subscribers.caches.AbstractResourceVariantTree#refresh(org.eclipse.core.resources.IResource[], int, org.eclipse.core.runtime.IProgressMonitor)
*/
public IResource[] refresh(IResource[] resources, int depth, IProgressMonitor monitor) throws TeamException {
return new IResource[0];
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.core.subscribers.caches.AbstractResourceVariantTree#fetchMembers(org.eclipse.team.core.synchronize.IResourceVariant, org.eclipse.core.runtime.IProgressMonitor)
*/
protected IResourceVariant[] fetchMembers(IResourceVariant variant, IProgressMonitor progress) throws TeamException {
// Refresh not supported
return new IResourceVariant[0];
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.core.subscribers.caches.AbstractResourceVariantTree#fetchVariant(org.eclipse.core.resources.IResource, int, org.eclipse.core.runtime.IProgressMonitor)
*/
protected IResourceVariant fetchVariant(IResource resource, int depth, IProgressMonitor monitor) throws TeamException {
// Refresh not supported
return null;
}
/* (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));
}
private ThreeWaySubscriber getSubscriber() {
return subscriber;
}
}
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