| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.wizards.datatransfer; |
| |
| import java.util.*; |
| import org.eclipse.ui.model.AdaptableList; |
| import org.eclipse.ui.dialogs.FileSystemElement; |
| |
| /** |
| * The <code>MinimizedFileSystemElement</code> is a <code>FileSystemElement</code> that knows |
| * if it has been populated or not. |
| */ |
| class MinimizedFileSystemElement extends FileSystemElement { |
| private boolean populated = false; |
| /** |
| * Create a <code>MinimizedFileSystemElement</code> with the supplied name and parent. |
| * @param name the name of the file element this represents |
| * @param parent the containing parent |
| * @param isDirectory indicated if this could have children or not |
| */ |
| MinimizedFileSystemElement(String name, FileSystemElement parent, boolean isDirectory) { |
| super(name, parent, isDirectory); |
| } |
| /** |
| * Returns a list of the files that are immediate children. Use the supplied provider |
| * if it needs to be populated. |
| * of this folder. |
| */ |
| public AdaptableList getFiles(IImportStructureProvider provider) { |
| if (!populated) { |
| populate(provider); |
| } |
| return super.getFiles(); |
| } |
| /** |
| * Returns a list of the folders that are immediate children. Use the supplied provider |
| * if it needs to be populated. |
| * of this folder. |
| */ |
| public AdaptableList getFolders(IImportStructureProvider provider) { |
| if (!populated) { |
| populate(provider); |
| } |
| return super.getFolders(); |
| } |
| /** |
| * Return whether or not population has happened for the receiver. |
| */ |
| boolean isPopulated() { |
| return this.populated; |
| } |
| /** |
| * Return whether or not population has not happened for the receiver. |
| */ |
| boolean notPopulated() { |
| return !this.populated; |
| } |
| /** |
| * Populate the files and folders of the receiver using the suppliec structure provider. |
| * @param provider org.eclipse.ui.wizards.datatransfer.IImportStructureProvider |
| */ |
| private void populate(IImportStructureProvider provider) { |
| |
| Object fileSystemObject = getFileSystemObject(); |
| |
| List children = provider.getChildren(fileSystemObject); |
| if (children == null) { |
| children = new ArrayList(1); |
| } |
| Iterator childrenEnum = children.iterator(); |
| while (childrenEnum.hasNext()) { |
| Object child = childrenEnum.next(); |
| |
| String elementLabel = provider.getLabel(child); |
| //Create one level below |
| MinimizedFileSystemElement result = |
| new MinimizedFileSystemElement(elementLabel, this, provider.isFolder(child)); |
| result.setFileSystemObject(child); |
| } |
| setPopulated(); |
| } |
| /** |
| * Set whether or not population has happened for the receiver to true. |
| */ |
| void setPopulated() { |
| this.populated = true; |
| } |
| } |