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/*******************************************************************************
* 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.mapping.provider;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.Assert;
import org.eclipse.team.core.diff.provider.TwoWayDiff;
import org.eclipse.team.core.history.IFileRevision;
import org.eclipse.team.core.mapping.IResourceDiff;
/**
* Implementation of {@link IResourceDiff}.
* <p>
* This class may be subclassed by clients.
*
* @since 3.2
*/
public class ResourceDiff extends TwoWayDiff implements IResourceDiff {
private final IFileRevision before;
private final IFileRevision after;
private final IResource resource;
/**
* Create a two-way resource diff
* @param resource the resource
* @param kind the kind of change (ADDED, REMOVED or CHANGED)
* @param flags additional flags that describe the change
* @param before the before state of the model object
* @param after the after state of the model object
*/
public ResourceDiff(IResource resource, int kind, int flags, IFileRevision before, IFileRevision after) {
super(resource.getFullPath(), kind, flags);
this.resource = resource;
this.before = before;
this.after = after;
}
/**
* Convenience constructor for creating a simple folder diff
* that consists of a resource and a kind only. It is equivalent to
* <code>ResourceDiff(resource, kind, 0, null, null)<code>
* @param resource a resource
* @param kind the kind of change (ADDED, REMOVED or CHANGED)
*/
public ResourceDiff(IResource resource, int kind) {
this(resource, kind, 0, null, null);
Assert.isTrue(resource.getType() != IResource.FILE);
}
/* (non-Javadoc)
* @see org.eclipse.team.core.diff.IResourceDiff#getBeforeState()
*/
public IFileRevision getBeforeState() {
return before;
}
/* (non-Javadoc)
* @see org.eclipse.team.core.diff.IResourceDiff#getAfterState()
*/
public IFileRevision getAfterState() {
return after;
}
/* (non-Javadoc)
* @see org.eclipse.team.core.diff.IResourceDiff#getResource()
*/
public IResource getResource() {
return resource;
}
/* (non-Javadoc)
* @see org.eclipse.team.core.diff.provider.Diff#equals(java.lang.Object)
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (super.equals(obj)) {
if (obj instanceof ResourceDiff) {
ResourceDiff other = (ResourceDiff) obj;
return getResource().equals(getResource())
&& revisionsEqual(getBeforeState(), other.getBeforeState())
&& revisionsEqual(getAfterState(), other.getAfterState());
}
}
return false;
}
private boolean revisionsEqual(IFileRevision revision, IFileRevision revision2) {
if (revision == null)
return revision2 == null;
if (revision2 == null)
return false;
return revision.equals(revision2);
}
}
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