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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.caches;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.core.subscribers.Subscriber;
import org.eclipse.team.core.synchronize.*;
/**
* A specialization of Subscriber that provides some additional logic for creating
* <code>SyncInfo</code> from <code>IResourceVariant</code> instances.
* The <code>members()</code> also assumes that remote
* instances are stored in the <code>ISynchronizer</code>.
*/
public abstract class SyncTreeSubscriber extends Subscriber {
public abstract IResourceVariant getRemoteResource(IResource resource) throws TeamException;
public abstract IResourceVariant getBaseResource(IResource resource) throws TeamException;
/**
* Return whether the given local resource has a corresponding remote resource
* @param resource the local resource
* @return <code>true</code> if the locla resource has a corresponding remote
*/
protected abstract boolean hasRemote(IResource resource) throws TeamException;
public SyncInfo getSyncInfo(IResource resource) throws TeamException {
if (!isSupervised(resource)) return null;
IResourceVariant remoteResource = getRemoteResource(resource);
IResourceVariant baseResource;
if (getResourceComparator().isThreeWay()) {
baseResource= getBaseResource(resource);
} else {
baseResource = null;
}
return getSyncInfo(resource, baseResource, remoteResource);
}
/**
* @return
*/
public abstract IResourceVariantComparator getResourceComparator();
/**
* Method that creates an instance of SyncInfo for the provider local, base and remote.
* Can be overiden by subclasses.
* @param local
* @param base
* @param remote
* @param monitor
* @return
*/
protected SyncInfo getSyncInfo(IResource local, IResourceVariant base, IResourceVariant remote) throws TeamException {
SyncInfo info = new SyncInfo(local, base, remote, this.getResourceComparator());
info.init();
return info;
}
public IResource[] members(IResource resource) throws TeamException {
if(resource.getType() == IResource.FILE) {
return new IResource[0];
}
try {
// Filter and return only phantoms associated with the remote synchronizer.
IResource[] members;
try {
members = ((IContainer)resource).members(true /* include phantoms */);
} catch (CoreException e) {
if (!isSupervised(resource) || e.getStatus().getCode() == IResourceStatus.RESOURCE_NOT_FOUND) {
// The resource is no longer supervised or doesn't exist in any form
// so ignore the exception and return that there are no members
return new IResource[0];
}
throw e;
}
List filteredMembers = new ArrayList(members.length);
for (int i = 0; i < members.length; i++) {
IResource member = members[i];
// TODO: consider that there may be several sync states on this resource. There
// should instead be a method to check for the existance of a set of sync types on
// a resource.
if(member.isPhantom() && !hasRemote(member)) {
continue;
}
// TODO: Is this a valid use of isSupervised
if (isSupervised(resource)) {
filteredMembers.add(member);
}
}
return (IResource[]) filteredMembers.toArray(new IResource[filteredMembers.size()]);
} catch (CoreException e) {
throw TeamException.asTeamException(e);
}
}
}
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