| /***************************************************************************** |
| * Copyright (c) 2013, 2017 CEA LIST. |
| * |
| * All rights reserved. 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: |
| * CEA LIST - Initial API and implementation |
| *****************************************************************************/ |
| package org.eclipse.papyrus.cdo.internal.ui.handlers; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.emf.cdo.dawn.spi.IDawnEditingSupport; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| |
| /** |
| * This is the UIHandlerUtil type. Enjoy. |
| */ |
| public class UIHandlerUtil { |
| |
| private UIHandlerUtil() { |
| super(); |
| } |
| |
| public static <T> Collection<T> getSelection(ExecutionEvent event, |
| Class<T> type) |
| throws ExecutionException { |
| |
| ISelection selection = HandlerUtil.getCurrentSelectionChecked(event); |
| Collection<T> result = Collections.emptyList(); |
| |
| if (selection instanceof IStructuredSelection) { |
| Collection<?> selected = ((IStructuredSelection) selection) |
| .toList(); |
| result = ImmutableList.copyOf(Iterables.filter(selected, type)); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * The return type is {@code List<Object>} because that is the type required |
| * by the Dawn {@link IDawnEditingSupport#lockObjects(java.util.List)} API. |
| */ |
| public static List<Object> getSelection(ExecutionEvent event) |
| throws ExecutionException { |
| |
| return (List<Object>) getSelection(event, Object.class); |
| } |
| |
| } |