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/*******************************************************************************
* Copyright (c) 2000, 2008 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.diff;
import org.eclipse.core.runtime.IPath;
import org.eclipse.team.core.diff.provider.Diff;
/**
* A diff describes differences between two or more model objects.
*
* @see ITwoWayDiff
* @see IThreeWayDiff
* @since 3.2
* @noimplement This interface is not intended to be implemented by clients.
* Instead, clients can subclass {@link Diff}.
*/
public interface IDiff {
/*
* ====================================================================
* Constants defining diff kinds:
* ====================================================================
*/
/**
* Diff kind constant (bit mask) indicating that the resource has not been changed in
* any way.
*
* @see IDiff#getKind()
*/
public static final int NO_CHANGE = 0;
/**
* Diff kind constant (bit mask) indicating that the resource has been
* added to its parent. That is, one that appears in the "after" state, not
* in the "before" one.
*
* @see IDiff#getKind()
*/
public static final int ADD = 0x1;
/**
* Diff kind constant (bit mask) indicating that the resource has been
* removed from its parent. That is, one that appears in the "before" state,
* not in the "after" one.
*
* @see IDiff#getKind()
*/
public static final int REMOVE = 0x2;
/**
* Diff kind constant (bit mask) indicating that the resource has been
* changed. That is, one that appears in both the "before" and "after"
* states.
*
* @see IDiff#getKind()
*/
public static final int CHANGE = 0x4;
/**
* Returns the full, absolute path of the object to which the diff applies
* with respect to the model root.
* <p>
* Note: the returned path never has a trailing separator.
* </p>
*
* @return the full, absolute path of this diff
*/
public IPath getPath();
/**
* Returns the kind of this diff. Normally, one of
* <code>ADDED</code>, <code>REMOVED</code>, <code>CHANGED</code>.
*
* @return the kind of this diff
* @see IDiff#ADD
* @see IDiff#REMOVE
* @see IDiff#CHANGE
*/
public int getKind();
/**
* Return a string that describes the difference represented by
* this node.
* @return a string that describes the difference represented by
* this node
*/
public String toDiffString();
}
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