| /******************************************************************************* |
| * 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.Assert; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.team.core.diff.IDiff; |
| import org.eclipse.team.core.diff.IThreeWayDiff; |
| import org.eclipse.team.core.diff.ITwoWayDiff; |
| import org.eclipse.team.internal.core.Messages; |
| import org.eclipse.team.internal.core.mapping.SyncInfoToDiffConverter; |
| |
| /** |
| * Implementation of {@link IThreeWayDiff}. |
| * |
| * @since 3.2 |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ThreeWayDiff extends Diff implements IThreeWayDiff { |
| |
| private final ITwoWayDiff localChange; |
| private final ITwoWayDiff remoteChange; |
| |
| /** |
| * Create a three-way delta from the two changes. At least one change |
| * must be provided (i.e. either change may be <code>null</code> |
| * but at least one must be non-<code>null</code>). |
| * @param localChange the local change in the model object or <code>null</code> if there is no local change |
| * @param remoteChange the remote change in the model object or <code>null</code> if there is no local change |
| */ |
| public ThreeWayDiff(ITwoWayDiff localChange, ITwoWayDiff remoteChange) { |
| super(calculatePath(localChange, remoteChange), calculateKind(localChange, remoteChange) | calculateDirection(localChange, remoteChange)); |
| this.localChange = localChange; |
| this.remoteChange = remoteChange; |
| } |
| |
| private static IPath calculatePath(ITwoWayDiff localChange, ITwoWayDiff remoteChange) { |
| if (localChange != null && remoteChange != null) |
| Assert.isTrue(localChange.getPath().equals(remoteChange.getPath())); |
| if (localChange != null) |
| return localChange.getPath(); |
| if (remoteChange != null) |
| return remoteChange.getPath(); |
| Assert.isLegal(false, "Either or local or remote change must be supplied"); //$NON-NLS-1$ |
| return null; // Will never be reached |
| } |
| |
| private static int calculateDirection(ITwoWayDiff localChange, ITwoWayDiff remoteChange) { |
| int direction = 0; |
| if (localChange != null && localChange.getKind() != NO_CHANGE) { |
| direction |= OUTGOING; |
| } |
| if (remoteChange != null && remoteChange.getKind() != NO_CHANGE) { |
| direction |= INCOMING; |
| } |
| return direction; |
| } |
| |
| private static int calculateKind(ITwoWayDiff localChange, ITwoWayDiff remoteChange) { |
| int localKind = NO_CHANGE; |
| if (localChange != null) |
| localKind = localChange.getKind(); |
| int remoteKind = NO_CHANGE; |
| if (remoteChange != null) |
| remoteKind = remoteChange.getKind(); |
| if (localKind == NO_CHANGE || localKind == remoteKind) |
| return remoteKind; |
| if (remoteKind == NO_CHANGE) |
| return localKind; |
| return CHANGE; |
| } |
| |
| @Override |
| public ITwoWayDiff getLocalChange() { |
| return localChange; |
| } |
| |
| @Override |
| public ITwoWayDiff getRemoteChange() { |
| return remoteChange; |
| } |
| |
| @Override |
| public int getDirection() { |
| return getStatus() & CONFLICTING; |
| } |
| |
| @Override |
| public String toDiffString() { |
| int kind = getKind(); |
| String label = ""; //$NON-NLS-1$ |
| if(kind==IDiff.NO_CHANGE) { |
| label = super.toDiffString(); |
| } else { |
| label = SyncInfoToDiffConverter.diffDirectionToString(getDirection()); |
| label = NLS.bind(Messages.concatStrings, new String[] { label, super.toDiffString() }); |
| } |
| return label; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) |
| return true; |
| if (super.equals(obj)) { |
| if (obj instanceof ThreeWayDiff) { |
| ThreeWayDiff other = (ThreeWayDiff) obj; |
| return changesEqual(getLocalChange(), other.getLocalChange()) |
| && changesEqual(getRemoteChange(), other.getRemoteChange()); |
| } |
| } |
| return false; |
| } |
| |
| private boolean changesEqual(ITwoWayDiff diff, ITwoWayDiff diff2) { |
| if (diff == null) |
| return diff2 == null; |
| if (diff2 == null) |
| return false; |
| return diff.equals(diff2); |
| } |
| |
| } |