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
/*******************************************************************************
 * 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 ITwoWayDiff. By default, this implementation returns null for the getFromPath() and getToPath(). Subclasses that support move diffs should override these methods. 

This class may be subclassed by clients.
Since:
3.2/**
 * 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 FLAG_MASK
See Also:
getStatus.getStatus()/**
	 * 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
Params:
path – the path of the model object that has changed
kind – the kind of change
flags – additional flags that describe the change/**
	 * 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);
	}

}