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/*******************************************************************************
* Copyright (c) 2000, 2017 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.core.diff.provider;
import org.eclipse.core.runtime.IPath;
import org.eclipse.team.core.diff.ITwoWayDiff;
/**
* Implementation of {@link ITwoWayDiff}. By default, this implementation
* returns <code>null</code> for the {@link #getFromPath() } and
* {@link #getToPath() }. Subclasses that support move diffs
* should override these methods.
* <p>
* This class may be subclassed by clients.
*
* @since 3.2
*/
public class TwoWayDiff extends Diff implements ITwoWayDiff {
/**
* Constant (bit mask) that defines the area of the status that is reserved
* for use by this abstract class for encoding the flags of the diff.
* However, subclasses may include their own bits in the flag
* as long as they do not overlap with the bits in the <code>FLAG_MASK</code>
*
* @see Diff#getStatus()
*/
protected static final int FLAG_MASK = 0xFF00;
/**
* Create a two-way diff
* @param path the path of the model object that has changed
* @param kind the kind of change
* @param flags additional flags that describe the change
*/
public TwoWayDiff(IPath path, int kind, int flags) {
super(path, (kind & KIND_MASK) | (flags & ~KIND_MASK));
}
@Override
public int getFlags() {
return getStatus() & ~KIND_MASK;
}
@Override
public IPath getToPath() {
return null;
}
@Override
public IPath getFromPath() {
return null;
}
@Override
public boolean equals(Object obj) {
if (obj == this)
return true;
if (super.equals(obj)) {
if (obj instanceof TwoWayDiff) {
TwoWayDiff other = (TwoWayDiff) obj;
return pathsEqual(getFromPath(), other.getFromPath()) && pathsEqual(getToPath(), other.getToPath());
}
}
return false;
}
private boolean pathsEqual(IPath path1, IPath path2) {
if (path1 == null)
return path2 == null;
if (path2 == null)
return false;
return path1.equals(path2);
}
}
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