| /******************************************************************************* |
| * Copyright (c) 2016, 2018 Obeo. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0 |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: Obeo - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.eef.ide.ui.ext.widgets.reference.internal; |
| |
| import java.util.Collection; |
| |
| import org.eclipse.emf.ecore.EObject; |
| import org.eclipse.emf.ecore.EReference; |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| |
| /** |
| * The {@link IStructuredContentProvider} to display the value of the given EReference. |
| * |
| * @author sbegaudeau |
| */ |
| public class EReferenceContentProvider implements IStructuredContentProvider { |
| |
| /** |
| * The EReference. |
| */ |
| private EReference eReference; |
| |
| /** |
| * The constructor. |
| * |
| * @param eReference |
| * The EReference |
| */ |
| public EReferenceContentProvider(EReference eReference) { |
| this.eReference = eReference; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, |
| * java.lang.Object) |
| */ |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| // do nothing |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) |
| */ |
| @Override |
| public Object[] getElements(Object inputElement) { |
| if (inputElement instanceof EObject && ((EObject) inputElement).eClass().getEAllStructuralFeatures().contains(this.eReference)) { |
| EObject eObject = (EObject) inputElement; |
| Object values = eObject.eGet(eReference); |
| if (values instanceof Collection<?>) { |
| Collection<?> collections = (Collection<?>) values; |
| return collections.toArray(); |
| } |
| } |
| return new Object[] {}; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#dispose() |
| */ |
| @Override |
| public void dispose() { |
| // do nothing |
| } |
| |
| } |