| /******************************************************************************* |
| * Copyright (c) 2012, 2020 Original authors and others. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Original authors and others - initial API and implementation |
| * Dirk Fauth <dirk.fauth@googlemail.com> - Deprecated expand/collapse methods since they should reside in ITreeRowModel |
| * Dirk Fauth <dirk.fauth@googlemail.com> - Bug 455364 |
| ******************************************************************************/ |
| package org.eclipse.nebula.widgets.nattable.extension.glazedlists.tree; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.nebula.widgets.nattable.tree.ITreeData; |
| |
| import ca.odell.glazedlists.TreeList; |
| import ca.odell.glazedlists.TreeList.Node; |
| |
| /** |
| * Implementation of ITreeData that operates on a GlazedLists TreeList. |
| * |
| * @param <T> |
| * The type of objects that are contained in the TreeList. |
| */ |
| public class GlazedListTreeData<T> implements ITreeData<T> { |
| |
| private final TreeList<T> treeList; |
| |
| public GlazedListTreeData(TreeList<T> treeList) { |
| this.treeList = treeList; |
| } |
| |
| @Override |
| public T getDataAtIndex(int index) { |
| if (!isValidIndex(index)) { |
| return null; |
| } |
| return this.treeList.get(index); |
| } |
| |
| @Override |
| public int getDepthOfData(T object) { |
| return getDepthOfData(indexOf(object)); |
| } |
| |
| @Override |
| public int getDepthOfData(int index) { |
| if (!isValidIndex(index)) { |
| return 0; |
| } |
| return this.treeList.depth(index); |
| } |
| |
| @Override |
| public int indexOf(T object) { |
| return this.treeList.indexOf(object); |
| } |
| |
| @Override |
| public boolean hasChildren(T object) { |
| return hasChildren(indexOf(object)); |
| } |
| |
| @Override |
| public boolean hasChildren(int index) { |
| if (!isValidIndex(index)) { |
| return false; |
| } |
| return this.treeList.hasChildren(index); |
| } |
| |
| @Override |
| public List<T> getChildren(T object) { |
| return getChildren(indexOf(object)); |
| } |
| |
| private List<T> getNodeChildren(Node<T> treeNode) { |
| List<T> children = new ArrayList<>(); |
| for (Node<T> child : treeNode.getChildren()) { |
| children.add(child.getElement()); |
| children.addAll(getNodeChildren(child)); |
| } |
| return children; |
| } |
| |
| @Override |
| public List<T> getChildren(T object, boolean fullDepth) { |
| if (!fullDepth) { |
| return getChildren(object); |
| } |
| int index = indexOf(object); |
| if (index >= 0) { |
| Node<T> treeNode = this.treeList.getTreeNode(index); |
| return getNodeChildren(treeNode); |
| } |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public List<T> getChildren(int index) { |
| if (!isValidIndex(index)) { |
| return new ArrayList<>(); |
| } |
| |
| List<T> children = null; |
| if (index >= 0) { |
| Node<T> treeNode = this.treeList.getTreeNode(index); |
| if (treeNode != null) { |
| List<Node<T>> childrenNodes = treeNode.getChildren(); |
| children = new ArrayList<>(childrenNodes.size()); |
| for (Node<T> node : childrenNodes) { |
| children.add(node.getElement()); |
| } |
| } |
| } |
| return children != null ? children : new ArrayList<>(); |
| } |
| |
| @Override |
| public int getElementCount() { |
| return this.treeList.size(); |
| } |
| |
| @Override |
| public boolean isValidIndex(int index) { |
| return (index >= 0 && index < this.treeList.size()); |
| } |
| |
| /** |
| * @return The underlying {@link TreeList} this {@link GlazedListTreeData} |
| * is operating on. |
| */ |
| public TreeList<T> getTreeList() { |
| return this.treeList; |
| } |
| } |