| /******************************************************************************* |
| * Copyright (c) 2013, 2018 CEA LIST and others. |
| * 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 |
| * http://www.eclipse.org/legal/epl-v20.html |
| * |
| * Contributors: |
| * E.D.Willink (CEA LIST) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ocl.examples.emf.validation.validity.ui.providers; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ocl.examples.emf.validation.validity.AbstractNode; |
| import org.eclipse.ocl.examples.emf.validation.validity.RootNode; |
| import org.eclipse.ocl.examples.emf.validation.validity.manager.ValidityManager; |
| |
| public abstract class AbstractNodeContentProvider implements ITreeContentProvider |
| { |
| public static final @NonNull Object @NonNull [] NO_OBJECTS = new @NonNull Object[0]; |
| |
| private final @NonNull ValidityManager validityManager; |
| |
| public AbstractNodeContentProvider(@NonNull ValidityManager validityManager) { |
| this.validityManager = validityManager; |
| } |
| |
| @Override |
| public void dispose() {} |
| |
| @Override |
| public Object[] getElements(Object inputElement) { |
| RootNode rootNode = validityManager.getRootNode(); |
| if (rootNode == null) { |
| return NO_OBJECTS; |
| } |
| List<@NonNull ? extends AbstractNode> validatableNodes = getRootNodes(rootNode); |
| List<@NonNull AbstractNode> visibleNodes = new ArrayList<>(validatableNodes.size()); |
| for (@NonNull AbstractNode node : validatableNodes) { |
| if (node.isVisible()) { |
| visibleNodes.add(node); |
| } |
| } |
| return visibleNodes.toArray(new Object[visibleNodes.size()]); |
| } |
| |
| @Override |
| public Object[] getChildren(Object parentElement) { |
| return ((AbstractNode)parentElement).getVisibleChildren(); |
| } |
| |
| @Override |
| public Object getParent(Object element) { |
| return ((AbstractNode)element).getParent(); |
| } |
| |
| protected abstract @NonNull List<@NonNull ? extends AbstractNode> getRootNodes(@NonNull RootNode rootNode); |
| |
| @Override |
| public boolean hasChildren(Object element) { |
| AbstractNode[] validatableNodes = ((AbstractNode)element).getVisibleChildren(); |
| return validatableNodes.length > 0; |
| } |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {} |
| } |