| /******************************************************************************* |
| * Copyright (c) 2016, 2017 EclipseSource Muenchen GmbH 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: |
| * Stefan Dirix - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.papyrus.compare.diagram.ide.ui.contentmergeviewer.provider; |
| |
| import static org.eclipse.papyrus.compare.diagram.ide.ui.internal.context.PapyrusContextUtil.isPapyrusContext; |
| |
| import java.util.Map; |
| import java.util.WeakHashMap; |
| |
| import org.eclipse.emf.compare.Comparison; |
| import org.eclipse.emf.compare.adapterfactory.context.AbstractContextTester; |
| |
| /** |
| * Indicates whether we are in a Papyrus context. |
| * |
| * @author Stefan Dirix <sdirix@eclipsesource.com> |
| */ |
| public class PapyrusContextTester extends AbstractContextTester { |
| |
| /** |
| * A weak cache of comparisons that have been already been tested. |
| */ |
| private final Map<Comparison, Boolean> cache = new WeakHashMap<>(); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean apply(Map<Object, Object> context) { |
| Comparison comparison = getComparison(context); |
| if (comparison != null) { |
| Boolean result = cache.get(comparison); |
| if (result == null) { |
| result = Boolean.valueOf(isPapyrusContext(comparison)); |
| cache.put(comparison, result); |
| } |
| return result.booleanValue(); |
| } |
| return false; |
| } |
| |
| } |
