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/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ccvs.core;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceStatus;
import org.eclipse.core.runtime.*;
import org.eclipse.team.core.RepositoryProvider;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.core.diff.IDiff;
import org.eclipse.team.core.subscribers.Subscriber;
import org.eclipse.team.core.synchronize.SyncInfo;
import org.eclipse.team.core.variants.*;
import org.eclipse.team.internal.ccvs.core.filehistory.CVSResourceVariantFileRevision;
import org.eclipse.team.internal.ccvs.core.resources.CVSWorkspaceRoot;
import org.eclipse.team.internal.core.mapping.ResourceVariantFileRevision;
import org.eclipse.team.internal.core.mapping.SyncInfoToDiffConverter;
/**
* This class provides common functionality for three way synchronizing
* for CVS.
*/
public abstract class CVSSyncTreeSubscriber extends ResourceVariantTreeSubscriber implements IAdaptable {
public static final String SYNC_KEY_QUALIFIER = "org.eclipse.team.cvs"; //$NON-NLS-1$
private IResourceVariantComparator comparisonCriteria;
private QualifiedName id;
private String name;
private SyncInfoToDiffConverter converter = new CVSSyncInfoToDiffConverter();
public class CVSSyncInfoToDiffConverter extends SyncInfoToDiffConverter {
protected ResourceVariantFileRevision asFileRevision(IResourceVariant variant) {
return new CVSResourceVariantFileRevision(variant);
}
}
CVSSyncTreeSubscriber(QualifiedName id, String name) {
this.id = id;
this.name = name;
this.comparisonCriteria = new CVSRevisionNumberCompareCriteria(isThreeWay());
}
/* (non-Javadoc)
* @see org.eclipse.team.core.sync.ISyncTreeSubscriber#getId()
*/
public QualifiedName getId() {
return id;
}
/* (non-Javadoc)
* @see org.eclipse.team.core.sync.ISyncTreeSubscriber#getName()
*/
public String getName() {
return name;
}
/* (non-Javadoc)
* @see org.eclipse.team.core.sync.ISyncTreeSubscriber#getSyncInfo(org.eclipse.core.resources.IResource)
*/
public SyncInfo getSyncInfo(IResource resource) throws TeamException {
if (!isSupervised(resource)) return null;
if(resource.getType() == IResource.FILE || !isThreeWay()) {
return super.getSyncInfo(resource);
} else {
// In CVS, folders do not have a base. Hence, the remote is used as the base.
IResourceVariant remoteResource = getRemoteTree().getResourceVariant(resource);
return getSyncInfo(resource, remoteResource, remoteResource);
}
}
/* (non-Javadoc)
* @see org.eclipse.team.core.sync.ISyncTreeSubscriber#isSupervised(org.eclipse.core.resources.IResource)
*/
public boolean isSupervised(IResource resource) throws TeamException {
try {
RepositoryProvider provider = RepositoryProvider.getProvider(resource.getProject(), CVSProviderPlugin.getTypeId());
if (provider == null) return false;
// TODO: what happens for resources that don't exist?
// TODO: is it proper to use ignored here?
ICVSResource cvsThing = CVSWorkspaceRoot.getCVSResourceFor(resource);
if (cvsThing.isIgnored()) {
// An ignored resource could have an incoming addition (conflict)
return getRemoteTree().hasResourceVariant(resource);
}
return true;
} catch (TeamException e) {
// If there is no resource in core this means there is no local and no remote
// so the resource is not supervised.
if (e.getStatus().getCode() == IResourceStatus.RESOURCE_NOT_FOUND || !resource.getProject().isAccessible()) {
return false;
}
throw e;
}
}
/* (non-Javadoc)
* @see org.eclipse.team.core.subscribers.TeamSubscriber#getDefaultComparisonCriteria()
*/
public IResourceVariantComparator getResourceComparator() {
return comparisonCriteria;
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.core.subscribers.caches.ResourceVariantTreeSubscriber#getSyncInfo(org.eclipse.core.resources.IResource, org.eclipse.team.core.synchronize.IResourceVariant, org.eclipse.team.core.synchronize.IResourceVariant)
*/
protected SyncInfo getSyncInfo(IResource local, IResourceVariant base, IResourceVariant remote) throws TeamException {
CVSSyncInfo info = new CVSSyncInfo(local, base, remote, this);
info.init();
return info;
}
/*
* Indicate whether file contents should be cached on a refresh
*/
protected boolean getCacheFileContentsHint() {
return false;
}
/*
* Indicate whether the subscriber is two-way or three-way
*/
protected boolean isThreeWay() {
return true;
}
protected boolean rootsEqual(Subscriber other) {
Set roots1 = new HashSet(Arrays.asList(other.roots()));
Set roots2 = new HashSet(Arrays.asList(roots()));
if(roots1.size() != roots2.size()) return false;
return roots2.containsAll(roots1);
}
public IDiff getDiff(IResource resource) throws CoreException {
SyncInfo info = getSyncInfo(resource);
if (info == null || info.getKind() == SyncInfo.IN_SYNC)
return null;
return converter.getDeltaFor(info);
}
public <T> T getAdapter(Class<T> adapter) {
if (adapter == SyncInfoToDiffConverter.class) {
return adapter.cast(converter);
}
return Platform.getAdapterManager().getAdapter(this, adapter);
}
}
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