| /******************************************************************************* |
| * Copyright (c) 2001, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jem.internal.beaninfo.ui; |
| /* |
| * $RCSfile: PackageOnlyContentProvider.java,v $ |
| * $Revision: 1.4 $ $Date: 2005/08/24 21:07:12 $ |
| */ |
| |
| |
| import org.eclipse.jdt.ui.StandardJavaElementContentProvider; |
| |
| import org.eclipse.jdt.core.IPackageFragment; |
| import java.util.*; |
| /** |
| * A content provider which will only go down to the package level, |
| * it won't explore further. The advantage of this is so that plus signs ('+') |
| * won't show up on packages. The Filter technique could be used to not |
| * show the children, but this still shows the plus sign. |
| * |
| * Also, if the element is a java.util.List, then that list will be returned |
| * as the children. This allows for a root to be composed instead of being |
| * one of the standard Java Elements. |
| */ |
| |
| public class PackageOnlyContentProvider extends StandardJavaElementContentProvider { |
| |
| /** |
| * If the element is a list, return the iterator on it. |
| * Else send it up the chain. |
| */ |
| public Object[] getChildren(Object element) { |
| if (element instanceof List) |
| return ((List) element).toArray(); |
| return super.getChildren(element); |
| } |
| |
| /** |
| * If the element is a list and it is not empty, it has children, |
| * if it is a IPackageFragment it does not, |
| * else send it up the chain. |
| */ |
| public boolean hasChildren(Object element) { |
| if (element instanceof List) |
| return !((List) element).isEmpty(); |
| if (element instanceof IPackageFragment) |
| return false; |
| return super.hasChildren(element); |
| } |
| } |